How to use Collection.shouldContainNull method of io.kotest.matchers.collections.nulls class

Best Kotest code snippet using io.kotest.matchers.collections.nulls.Collection.shouldContainNull

CollectionMatchersTest.kt

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1package com.sksamuel.kotest.matchers.collections2import io.kotest.assertions.shouldFail3import io.kotest.assertions.throwables.shouldNotThrow4import io.kotest.assertions.throwables.shouldThrow5import io.kotest.assertions.withClue6import io.kotest.core.spec.style.WordSpec7import io.kotest.equals.Equality8import io.kotest.equals.types.byObjectEquality9import io.kotest.matchers.collections.atLeastSize10import io.kotest.matchers.collections.atMostSize11import io.kotest.matchers.collections.beLargerThan12import io.kotest.matchers.collections.beSameSizeAs13import io.kotest.matchers.collections.beSmallerThan14import io.kotest.matchers.collections.contain15import io.kotest.matchers.collections.containDuplicates16import io.kotest.matchers.collections.containNoNulls17import io.kotest.matchers.collections.containNull18import io.kotest.matchers.collections.containOnlyNulls19import io.kotest.matchers.collections.matchInOrder20import io.kotest.matchers.collections.existInOrder21import io.kotest.matchers.collections.haveElementAt22import io.kotest.matchers.collections.haveSize23import io.kotest.matchers.collections.matchEach24import io.kotest.matchers.collections.matchInOrderSubset25import io.kotest.matchers.collections.monotonicallyDecreasing26import io.kotest.matchers.collections.monotonicallyDecreasingWith27import io.kotest.matchers.collections.monotonicallyIncreasing28import io.kotest.matchers.collections.monotonicallyIncreasingWith29import io.kotest.matchers.collections.shouldBeIn30import io.kotest.matchers.collections.shouldBeLargerThan31import io.kotest.matchers.collections.shouldBeMonotonicallyDecreasing32import io.kotest.matchers.collections.shouldBeMonotonicallyDecreasingWith33import io.kotest.matchers.collections.shouldBeMonotonicallyIncreasing34import io.kotest.matchers.collections.shouldBeMonotonicallyIncreasingWith35import io.kotest.matchers.collections.shouldBeSameSizeAs36import io.kotest.matchers.collections.shouldBeSingleton37import io.kotest.matchers.collections.shouldBeSmallerThan38import io.kotest.matchers.collections.shouldBeSorted39import io.kotest.matchers.collections.shouldBeSortedBy40import io.kotest.matchers.collections.shouldBeSortedWith41import io.kotest.matchers.collections.shouldBeStrictlyDecreasing42import io.kotest.matchers.collections.shouldBeStrictlyDecreasingWith43import io.kotest.matchers.collections.shouldBeStrictlyIncreasing44import io.kotest.matchers.collections.shouldBeStrictlyIncreasingWith45import io.kotest.matchers.collections.shouldContainAnyOf46import io.kotest.matchers.collections.shouldContainDuplicates47import io.kotest.matchers.collections.shouldContainNoNulls48import io.kotest.matchers.collections.shouldContainNull49import io.kotest.matchers.collections.shouldContainOnlyNulls50import io.kotest.matchers.collections.shouldExist51import io.kotest.matchers.collections.shouldHaveAtLeastSize52import io.kotest.matchers.collections.shouldHaveAtMostSize53import io.kotest.matchers.collections.shouldHaveElementAt54import io.kotest.matchers.collections.shouldHaveSingleElement55import io.kotest.matchers.collections.shouldHaveSize56import io.kotest.matchers.collections.shouldMatchInOrder57import io.kotest.matchers.collections.shouldMatchInOrderSubset58import io.kotest.matchers.collections.shouldNotBeIn59import io.kotest.matchers.collections.shouldNotBeMonotonicallyDecreasing60import io.kotest.matchers.collections.shouldNotBeMonotonicallyDecreasingWith61import io.kotest.matchers.collections.shouldNotBeMonotonicallyIncreasing62import io.kotest.matchers.collections.shouldNotBeMonotonicallyIncreasingWith63import io.kotest.matchers.collections.shouldNotBeSingleton64import io.kotest.matchers.collections.shouldNotBeSorted65import io.kotest.matchers.collections.shouldNotBeSortedBy66import io.kotest.matchers.collections.shouldNotBeSortedWith67import io.kotest.matchers.collections.shouldNotBeStrictlyDecreasing68import io.kotest.matchers.collections.shouldNotBeStrictlyDecreasingWith69import io.kotest.matchers.collections.shouldNotBeStrictlyIncreasing70import io.kotest.matchers.collections.shouldNotBeStrictlyIncreasingWith71import io.kotest.matchers.collections.shouldNotContainAnyOf72import io.kotest.matchers.collections.shouldNotContainDuplicates73import io.kotest.matchers.collections.shouldNotContainNoNulls74import io.kotest.matchers.collections.shouldNotContainNull75import io.kotest.matchers.collections.shouldNotContainOnlyNulls76import io.kotest.matchers.collections.shouldNotHaveElementAt77import io.kotest.matchers.collections.shouldNotHaveSize78import io.kotest.matchers.collections.shouldNotMatchEach79import io.kotest.matchers.collections.shouldNotMatchInOrder80import io.kotest.matchers.collections.shouldNotMatchInOrderSubset81import io.kotest.matchers.collections.singleElement82import io.kotest.matchers.collections.sorted83import io.kotest.matchers.collections.strictlyDecreasing84import io.kotest.matchers.collections.strictlyDecreasingWith85import io.kotest.matchers.collections.strictlyIncreasing86import io.kotest.matchers.collections.strictlyIncreasingWith87import io.kotest.matchers.ints.shouldBeGreaterThan88import io.kotest.matchers.ints.shouldBeInRange89import io.kotest.matchers.should90import io.kotest.matchers.shouldBe91import io.kotest.matchers.shouldHave92import io.kotest.matchers.shouldNot93import io.kotest.matchers.shouldNotBe94import io.kotest.matchers.shouldNotHave95import io.kotest.matchers.throwable.shouldHaveMessage96class CollectionMatchersTest : WordSpec() {97 private val countdown = (10 downTo 0).toList()98 private val asc = { a: Int, b: Int -> a - b }99 private val desc = { a: Int, b: Int -> b - a }100 init {101 "a descending non-empty list" should {102 "fail to ascend" {103 shouldFail {104 countdown.shouldBeSortedWith(asc)105 }106 }107 "descend" {108 countdown.shouldBeSortedWith(desc)109 }110 "not ascend" {111 countdown.shouldNotBeSortedWith(asc)112 }113 "fail not to descend" {114 shouldFail {115 countdown.shouldNotBeSortedWith(desc)116 }117 }118 }119 "sortedWith" should {120 val items = listOf(121 1 to "I",122 2 to "II",123 4 to "IV",124 5 to "V",125 6 to "VI",126 9 to "IX",127 10 to "X"128 )129 "work on non-Comparable given a Comparator" {130 items.shouldBeSortedWith(Comparator { a, b -> asc(a.first, b.first) })131 }132 "work on non-Comparable given a compare function" {133 items.shouldBeSortedWith { a, b -> asc(a.first, b.first) }134 }135 }136 "haveElementAt" should {137 "test that a collection contains the specified element at the given index" {138 listOf("a", "b", "c") should haveElementAt(1, "b")139 listOf("a", "b", "c") shouldNot haveElementAt(1, "c")140 listOf("a", "b", null) should haveElementAt(2, null)141 listOf("a", "b", null) shouldNot haveElementAt(3, null)142 listOf("a", "b", "c").shouldHaveElementAt(1, "b")143 listOf("a", "b", "c").shouldNotHaveElementAt(1, "c")144 listOf("a", "b", null).shouldHaveElementAt(2, null)145 }146 "support type inference for subtypes of collection" {147 val tests = listOf(148 TestSealed.Test1("test1"),149 TestSealed.Test2(2)150 )151 tests should haveElementAt(0, TestSealed.Test1("test1"))152 tests.shouldHaveElementAt(1, TestSealed.Test2(2))153 }154 }155 "containNull()" should {156 "test that a collection contains at least one null" {157 listOf(1, 2, null) should containNull()158 listOf(null) should containNull()159 listOf(1, 2) shouldNot containNull()160 listOf(1, 2, null).shouldContainNull()161 listOf(null).shouldContainNull()162 listOf(1, 2).shouldNotContainNull()163 }164 }165 "sorted" should {166 "test that a collection is sorted" {167 emptyList<Int>() shouldBe sorted<Int>()168 listOf(1) shouldBe sorted<Int>()169 listOf(1, 2, 3, 4) shouldBe sorted<Int>()170 shouldThrow<AssertionError> {171 listOf(2, 1) shouldBe sorted<Int>()172 }.shouldHaveMessage("List [2, 1] should be sorted. Element 2 at index 0 was greater than element 1")173 listOf(1, 2, 6, 9).shouldBeSorted()174 shouldThrow<AssertionError> {175 listOf(2, 1).shouldBeSorted()176 }.shouldHaveMessage("List [2, 1] should be sorted. Element 2 at index 0 was greater than element 1")177 shouldThrow<AssertionError> {178 listOf(1, 2, 3).shouldNotBeSorted()179 }.shouldHaveMessage("List [1, 2, 3] should not be sorted")180 }181 "restrict items at the error message" {182 val longList = (1..1000).toList()183 shouldThrow<AssertionError> {184 longList.shouldNotBeSorted()185 }.shouldHaveMessage("List [1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, ...and 980 more (set the 'kotest.assertions.collection.print.size' JVM property to see more /​ less items)] should not be sorted")186 }187 }188 "sortedBy" should {189 val items = listOf(190 1 to "I",191 2 to "II",192 4 to "IV",193 5 to "V",194 6 to "VI",195 9 to "IX",196 10 to "X"197 )198 "compare by the tranformed value" {199 items.shouldBeSortedBy { it.first }200 items.shouldNotBeSortedBy { it.second }201 }202 }203 "shouldBeIncreasing" should {204 "test that a collection is monotonically increasing" {205 listOf(1, 2, 2, 3) shouldBe monotonicallyIncreasing<Int>()206 listOf(6, 5) shouldNotBe monotonicallyIncreasing<Int>()207 listOf(1, 2, 2, 3).shouldBeMonotonicallyIncreasing()208 listOf(6, 5).shouldNotBeMonotonicallyIncreasing()209 }210 "test that a collection is monotonically increasing according to comparator" {211 val comparator = Comparator(desc)212 listOf(3, 2, 2, 1) shouldBe monotonicallyIncreasingWith(comparator)213 listOf(5, 6) shouldNotBe monotonicallyIncreasingWith(comparator)214 listOf(3, 2, 2, 1).shouldBeMonotonicallyIncreasingWith(comparator)215 listOf(5, 6).shouldNotBeMonotonicallyIncreasingWith(comparator)216 }217 "test that a collection is strictly increasing" {218 listOf(1, 2, 3) shouldBe strictlyIncreasing<Int>()219 listOf(1, 2, 2, 3) shouldNotBe strictlyIncreasing<Int>()220 listOf(6, 5) shouldNotBe strictlyIncreasing<Int>()221 listOf(1, 2, 3).shouldBeStrictlyIncreasing()222 listOf(1, 2, 2, 3).shouldNotBeStrictlyIncreasing()223 listOf(6, 5).shouldNotBeStrictlyIncreasing()224 }225 "test that a collection is strictly increasing according to comparator" {226 val comparator = Comparator(desc)227 listOf(3, 2, 1) shouldBe strictlyIncreasingWith(comparator)228 listOf(3, 2, 2, 1) shouldNotBe strictlyIncreasingWith(comparator)229 listOf(5, 6) shouldNotBe strictlyIncreasingWith(comparator)230 listOf(3, 2, 1).shouldBeStrictlyIncreasingWith(comparator)231 listOf(3, 2, 2, 1).shouldNotBeStrictlyIncreasingWith(comparator)232 listOf(5, 6).shouldNotBeStrictlyIncreasingWith(comparator)233 }234 }235 "shouldBeDecreasing" should {236 "test that a collection is monotonically decreasing" {237 listOf(3, 2, 2, -4) shouldBe monotonicallyDecreasing<Int>()238 listOf(5, 6) shouldNotBe monotonicallyDecreasing<Int>()239 listOf(3, 2, 2, -4).shouldBeMonotonicallyDecreasing()240 listOf(5, 6).shouldNotBeMonotonicallyDecreasing()241 }242 "test that a collection is monotonically decreasing according to comparator" {243 val comparator = Comparator(desc)244 listOf(-4, 2, 2, 3) shouldBe monotonicallyDecreasingWith(comparator)245 listOf(6, 5) shouldNotBe monotonicallyDecreasingWith(comparator)246 listOf(-4, 2, 2, 3).shouldBeMonotonicallyDecreasingWith(comparator)247 listOf(6, 5).shouldNotBeMonotonicallyDecreasingWith(comparator)248 }249 "test that a collection is strictly decreasing" {250 listOf(3, 2, -4) shouldBe strictlyDecreasing<Int>()251 listOf(3, 2, 2, -4) shouldNotBe strictlyDecreasing<Int>()252 listOf(5, 6) shouldNotBe strictlyDecreasing<Int>()253 listOf(3, 2, -4).shouldBeStrictlyDecreasing()254 listOf(3, 2, 2, -4).shouldNotBeStrictlyDecreasing()255 listOf(5, 6).shouldNotBeStrictlyDecreasing()256 }257 "test that a collection is strictly decreasing according to comparator" {258 val comparator = Comparator(desc)259 listOf(-4, 2, 3) shouldBe strictlyDecreasingWith(comparator)260 listOf(-4, 2, 2, 3) shouldNotBe strictlyDecreasingWith(comparator)261 listOf(6, 5) shouldNotBe strictlyDecreasingWith(comparator)262 listOf(-4, 2, 3).shouldBeStrictlyDecreasingWith(comparator)263 listOf(-4, 2, 2, 3).shouldNotBeStrictlyDecreasingWith(comparator)264 listOf(6, 5).shouldNotBeStrictlyDecreasingWith(comparator)265 }266 }267 "haveDuplicates" should {268 "test that a collection is unique" {269 listOf(1, 2, 3, 3) should containDuplicates()270 listOf(1, 2, 3, 4) shouldNot containDuplicates()271 listOf(1, 2, 3, 3).shouldContainDuplicates()272 listOf(1, 2, 3, 4).shouldNotContainDuplicates()273 }274 }275 "singleElement" should {276 "test that a collection contains a single given element" {277 listOf(1) shouldBe singleElement(1)278 listOf(1).shouldHaveSingleElement(1)279 shouldThrow<AssertionError> {280 listOf(1) shouldBe singleElement(2)281 }.shouldHaveMessage("Collection should be a single element of 2 but has 1 elements: [1]")282 shouldThrow<AssertionError> {283 listOf(1, 2) shouldBe singleElement(2)284 }.shouldHaveMessage("Collection should be a single element of 2 but has 2 elements: [1, 2]")285 }286 }287 "singleElement with predicate" should {288 "test that a collection contains a single element by given predicate" {289 listOf(1) shouldHave singleElement { e -> e == 1 }290 listOf(1).shouldHaveSingleElement { e -> e == 1 }291 shouldThrow<AssertionError> {292 listOf(1) shouldHave singleElement { e -> e == 2 }293 }.shouldHaveMessage("Collection should have a single element by a given predicate but has 0 elements: [1]")294 shouldThrow<AssertionError> {295 listOf(2, 2) shouldHave singleElement { e -> e == 2 }296 }.shouldHaveMessage("Collection should have a single element by a given predicate but has 2 elements: [2, 2]")297 }298 }299 "should contain element" should {300 "test that a collection contains an element" {301 val col = listOf(1, 2, 3)302 col should contain(2)303 col should contain(2.0) /​/​ uses strict num equality = false304 shouldThrow<AssertionError> {305 col should contain(4)306 }.shouldHaveMessage("Collection should contain element 4 based on object equality; but the collection is [1, 2, 3]")307 }308 }309 "should contain element based on a custom equality object" should {310 "test that a collection contains an element" {311 val col = listOf(1, 2, 3.0)312 val verifier = Equality.byObjectEquality<Number>(strictNumberEquality = true)313 col should contain(2, verifier)314 col should contain(3.0, verifier)315 shouldThrow<AssertionError> {316 col should contain(3, verifier)317 }.shouldHaveMessage("Collection should contain element 3 based on object equality; but the collection is [1, 2, 3.0]")318 }319 }320 "shouldBeLargerThan" should {321 "test that a collection is larger than another collection" {322 val col1 = listOf(1, 2, 3)323 val col2 = setOf(1, 2, 3, 4)324 col2.shouldBeLargerThan(col1)325 col2 should beLargerThan(col1)326 col1 shouldNot beLargerThan(col2)327 shouldThrow<AssertionError> {328 col1.shouldBeLargerThan(col2)329 }.shouldHaveMessage("Collection of size 3 should be larger than collection of size 4")330 }331 }332 "shouldBeSmallerThan" should {333 "test that a collection is smaller than another collection" {334 val col1 = listOf(1, 2, 3)335 val col2 = setOf(1, 2, 3, 4)336 col1.shouldBeSmallerThan(col2)337 col1 should beSmallerThan(col2)338 col2 shouldNot beSmallerThan(col1)339 shouldThrow<AssertionError> {340 col2.shouldBeSmallerThan(col1)341 }.shouldHaveMessage("Collection of size 4 should be smaller than collection of size 3")342 }343 }344 "shouldBeSameSizeAs" should {345 "test that a collection is the same size as another collection" {346 val col1 = listOf(1, 2, 3)347 val col2 = setOf(1, 2, 3)348 val col3 = listOf(1, 2, 3, 4)349 col1.shouldBeSameSizeAs(col2)350 col1 should beSameSizeAs(col2)351 col1 shouldNot beSameSizeAs(col3)352 shouldThrow<AssertionError> {353 col1.shouldBeSameSizeAs(col3)354 }.shouldHaveMessage("Collection of size 3 should be the same size as collection of size 4")355 }356 }357 "haveSize" should {358 "test that a collection has a certain size" {359 val col1 = listOf(1, 2, 3)360 col1 should haveSize(3)361 col1.shouldHaveSize(3)362 shouldThrow<AssertionError> {363 col1 should haveSize(2)364 }365 val col2 = emptyList<String>()366 col2 should haveSize(0)367 shouldThrow<AssertionError> {368 col2 should haveSize(1)369 }370 listOf(1, 2, 3).shouldNotHaveSize(1)371 listOf(1, 2, 3).shouldNotHaveSize(4)372 shouldThrow<AssertionError> {373 listOf(1, 2, 3).shouldNotHaveSize(3)374 }.shouldHaveMessage("Collection should not have size 3. Values: [1, 2, 3]")375 }376 }377 "should be singleton" should {378 "pass for collection with a single element" {379 listOf(1).shouldBeSingleton()380 }381 "fail for collection with 0 elements" {382 shouldThrow<AssertionError> {383 listOf<Int>().shouldBeSingleton()384 }.shouldHaveMessage("Collection should have size 1 but has size 0. Values: []")385 }386 "fail for collection with 2+ elements" {387 shouldThrow<AssertionError> {388 listOf(1, 2).shouldBeSingleton()389 }.shouldHaveMessage("Collection should have size 1 but has size 2. Values: [1, 2]")390 shouldThrow<AssertionError> {391 listOf(1, 2, 3, 4).shouldBeSingleton()392 }.shouldHaveMessage("Collection should have size 1 but has size 4. Values: [1, 2, 3, 4]")393 }394 }395 "should be singleton with block" should {396 "pass for collection with a single element" {397 listOf(1).shouldBeSingleton { it shouldBe 1 }398 }399 "fail for collection with 0 elements" {400 shouldThrow<AssertionError> {401 listOf<Int>().shouldBeSingleton { it shouldBe 1 }402 }.shouldHaveMessage("Collection should have size 1 but has size 0. Values: []")403 }404 "fail for collection with a single incorrect elements" {405 shouldThrow<AssertionError> {406 listOf(2).shouldBeSingleton { it shouldBe 1 }407 }.shouldHaveMessage("expected:<1> but was:<2>")408 }409 "fail for collection with 2+ elements" {410 shouldThrow<AssertionError> {411 listOf(1, 2).shouldBeSingleton { it shouldBe 1 }412 }.shouldHaveMessage("Collection should have size 1 but has size 2. Values: [1, 2]")413 shouldThrow<AssertionError> {414 listOf(1, 2, 3, 4).shouldBeSingleton { it shouldBe 1 }415 }.shouldHaveMessage("Collection should have size 1 but has size 4. Values: [1, 2, 3, 4]")416 }417 }418 "should not be singleton" should {419 "pass for collection with 0 elements" {420 listOf<Int>().shouldNotBeSingleton()421 }422 "pass for collection with 2+ elements" {423 listOf(1, 2).shouldNotBeSingleton()424 listOf(1, 2, 3, 4).shouldNotBeSingleton()425 }426 "fail for collection with a single element" {427 shouldThrow<AssertionError> {428 listOf(1).shouldNotBeSingleton()429 }.shouldHaveMessage("Collection should not have size 1. Values: [1]")430 }431 }432 "shouldExist" should {433 "test that a collection contains at least one element that matches a predicate" {434 val list = listOf(1, 2, 3)435 list.shouldExist { it == 2 }436 }437 }438 "shouldHaveAtLeastSize" should {439 "test that a collection has at least a certain number of elements" {440 val list = listOf(1, 2, 3)441 list.shouldHaveAtLeastSize(2)442 list shouldHave atLeastSize(2)443 val set = setOf(1, 2, 3)444 set.shouldHaveAtLeastSize(3)445 set shouldHave atLeastSize(3)446 shouldThrow<AssertionError> {447 list.shouldHaveAtLeastSize(4)448 }.shouldHaveMessage("Collection [1, 2, 3] should contain at least 4 elements")449 shouldThrow<AssertionError> {450 list shouldHave atLeastSize(4)451 }.shouldHaveMessage("Collection [1, 2, 3] should contain at least 4 elements")452 shouldThrow<AssertionError> {453 list shouldNotHave atLeastSize(2)454 }.shouldHaveMessage("Collection [1, 2, 3] should contain less than 2 elements")455 }456 }457 "shouldHaveAtMostSize" should {458 "test that a collection has at least a certain number of elements" {459 val list = listOf(1, 2, 3)460 list.shouldHaveAtMostSize(3)461 list shouldHave atMostSize(3)462 list.shouldHaveAtMostSize(4)463 list shouldHave atMostSize(4)464 val set = setOf(1, 2, 3)465 set.shouldHaveAtMostSize(3)466 set shouldHave atMostSize(3)467 set.shouldHaveAtMostSize(4)468 set shouldHave atMostSize(4)469 shouldThrow<AssertionError> {470 list.shouldHaveAtMostSize(2)471 }.shouldHaveMessage("Collection [1, 2, 3] should contain at most 2 elements")472 shouldThrow<AssertionError> {473 list shouldHave atMostSize(2)474 }.shouldHaveMessage("Collection [1, 2, 3] should contain at most 2 elements")475 shouldThrow<AssertionError> {476 list shouldNotHave atMostSize(4)477 }.shouldHaveMessage("Collection [1, 2, 3] should contain more than 4 elements")478 }479 }480 "containNoNulls" should {481 "test that a collection contains zero nulls" {482 emptyList<String>() should containNoNulls()483 listOf(1, 2, 3) should containNoNulls()484 listOf(null, null, null) shouldNot containNoNulls()485 listOf(1, null, null) shouldNot containNoNulls()486 emptyList<String>().shouldContainNoNulls()487 listOf(1, 2, 3).shouldContainNoNulls()488 listOf(null, null, null).shouldNotContainNoNulls()489 listOf(1, null, null).shouldNotContainNoNulls()490 shouldThrow<AssertionError> {491 listOf(null, null, null).shouldContainNoNulls()492 }.shouldHaveMessage("Collection should not contain nulls")493 shouldThrow<AssertionError> {494 listOf(1, 2, 3).shouldNotContainNoNulls()495 }.shouldHaveMessage("Collection should have at least one null")496 }497 "support type inference for subtypes of collection" {498 val tests = listOf(499 TestSealed.Test1("test1"),500 TestSealed.Test2(2)501 )502 tests should containNoNulls()503 tests.shouldContainNoNulls()504 }505 }506 "containOnlyNulls" should {507 "test that a collection contains only nulls" {508 emptyList<String>() should containOnlyNulls()509 listOf(null, null, null) should containOnlyNulls()510 listOf(1, null, null) shouldNot containOnlyNulls()511 listOf(1, 2, 3) shouldNot containOnlyNulls()512 listOf(null, 1, 2, 3).shouldNotContainOnlyNulls()513 listOf(1, 2, 3).shouldNotContainOnlyNulls()514 listOf(null, null, null).shouldContainOnlyNulls()515 }516 }517 "matchInOrder" should {518 "test that a collection matches the assertions in the given order, duplicates permitted" {519 withClue("Gaps not allowed") {520 shouldFail {521 listOf(1, 2, 2, 3) should matchInOrder(522 { it shouldBe 1 },523 { it shouldBe 2 },524 { it shouldBe 3 }525 )526 }527 }528 arrayOf(2, 2, 3).shouldMatchInOrder(529 { it shouldBe 2 },530 { it shouldBe 2 },531 { it shouldBe 3 },532 )533 }534 "failure shows best result" {535 shouldFail {536 listOf(1, 2, 3, 1, 2, 1, 2).shouldMatchInOrder(537 { it shouldBe 1 },538 { it shouldBe 2 },539 { it shouldBe 1 },540 { it shouldBe 3 },541 )542 }.message shouldBe """543 Expected a sequence of elements to pass the assertions, but failed to match all assertions544 Best result when comparing from index [3], where 3 elements passed, but the following elements failed:545 6 => expected:<3> but was:<2>546 """.trimIndent()547 }548 "Non existing element causes error" {549 shouldThrow<AssertionError> {550 listOf(1, 2, 3).shouldMatchInOrder(551 { it shouldBe 1 },552 { it shouldBe 2 },553 { it shouldBe 6 }554 )555 }556 }557 "out-of-order elements cause error" {558 shouldThrow<AssertionError> {559 listOf(1, 2, 3) should matchInOrder(560 { it shouldBe 2 },561 { it shouldBe 1 },562 { it shouldBe 3 }563 )564 }565 }566 "work with unsorted collections" {567 val actual = listOf(5, 3, 1, 2, 4, 2)568 withClue("should match 4th, 5th and 6th elements ([.., 2, 4, 2])") {569 actual should matchInOrder(570 { it shouldBe 2 },571 { it shouldBeGreaterThan 3 },572 { it shouldBeInRange 2..2 }573 )574 }575 }576 "negation should work" {577 shouldFail {578 listOf(1, 2, 3, 4).shouldNotMatchInOrder(579 { it shouldBe 2 },580 { it shouldBe 3 },581 )582 }.message shouldBe """583 Expected some assertion to fail but all passed584 """.trimIndent()585 listOf(1, 2, 3, 4).shouldNotMatchInOrder(586 { it shouldBe 2 },587 { it shouldBe 4 }588 )589 }590 }591 "matchInOrderSubset" should {592 "test that a collection matches the assertions in the given order without gaps" {593 listOf(1, 1, 2, 2, 3, 3) should matchInOrderSubset(594 { it shouldBe 1 },595 { it shouldBe 2 },596 { it shouldBe 2 },597 { it shouldBe 3 }598 )599 arrayOf(1, 1, 1).shouldMatchInOrderSubset(600 { it shouldBe 1 }601 )602 }603 "Negation should work" {604 shouldFail {605 listOf(1, 2, 3, 4).shouldNotMatchInOrderSubset(606 { it shouldBe 2 },607 { it shouldBe 4 },608 )609 }.message shouldBe """610 Expected some assertion to fail but all passed611 """.trimIndent()612 arrayOf(1, 2, 3, 4).shouldNotMatchInOrder(613 { it shouldBe 4 },614 { it shouldBe 1 }615 )616 }617 "Non existing element causes error" {618 shouldThrow<AssertionError> {619 listOf(1, 1, 2, 2, 3, 3) should matchInOrderSubset(620 { it shouldBe 1 },621 { it shouldBe 2 },622 { it shouldBe 6 }623 )624 }.message shouldBe """625 Expected a sequence of elements to pass the assertions, possibly with gaps between but failed to match all assertions626 Best result when comparing from index [0], where 2 elements passed, but the following elements failed:627 3 => expected:<6> but was:<2>628 4 => expected:<6> but was:<3>629 5 => expected:<6> but was:<3>630 """.trimIndent()631 }632 "out-of-order elements cause error" {633 shouldThrow<AssertionError> {634 listOf(1, 2, 3) should matchInOrderSubset(635 { it shouldBe 2 },636 { it shouldBe 1 },637 { it shouldBe 3 }638 )639 }640 }641 "gaps should be ok" {642 listOf(1, 1, 2, 2, 3, 3) should matchInOrderSubset(643 { it shouldBe 1 },644 { it shouldBe 2 },645 { it shouldBe 3 }646 )647 }648 "work with unsorted collections" {649 val actual = listOf(5, 3, 1, 2, 4, 2)650 withClue("should match 4th, 5th and 6th elements ([.., 2, 4, 2])") {651 actual should matchInOrderSubset(652 { it shouldBe 2 },653 { it shouldBeGreaterThan 3 },654 { it shouldBeInRange 2..2 }655 )656 }657 }658 }659 "matchEach" should {660 "test that a collection matches the assertions in the given order without gaps" {661 listOf(1, 3, 7) should matchEach(662 { it shouldBe 1 },663 { it shouldBeInRange 2..4 },664 { it shouldBeGreaterThan 2 }665 )666 }667 "Negation should work" {668 shouldFail{669 listOf(1, 2).shouldNotMatchEach(670 { it shouldBe 1 },671 { it shouldBe 2 },672 )673 }.message shouldBe """674 Expected some element to fail its assertion, but all passed.675 """.trimIndent()676 arrayOf(1, 2).shouldNotMatchEach(677 { it shouldBe 2 },678 { it shouldBe 1 }679 )680 }681 "No assertion exists for each element" {682 shouldFail {683 listOf(1, -1, 999) should matchEach(684 { it shouldBe 1 }685 )686 }.message shouldBe """687 Expected each element to pass its assertion, but found issues at indexes: [1, 2]688 1 => Element has no corresponding assertion. Only 1 assertions provided689 2 => Element has no corresponding assertion. Only 1 assertions provided690 """.trimIndent()691 }692 "Too many assertions cause error" {693 shouldFail {694 listOf(1, 3, 7) should matchEach(695 { it shouldBe 1 },696 { it shouldBe 3 },697 { it shouldBe 7 },698 { it shouldBe 7 },699 { it shouldBe 7 },700 )701 }.message shouldBe """702 Expected each element to pass its assertion, but found issues at indexes: [3, 4]703 3 => No actual element for assertion at index 3704 4 => No actual element for assertion at index 4705 """.trimIndent()706 }707 "Non matching element causes error" {708 shouldFail {709 listOf(1, 3, 7) should matchEach(710 { it shouldBe 1 },711 { it shouldBeInRange 2..4 },712 { it shouldBeGreaterThan 7 }713 )714 }.message shouldBe """715 Expected each element to pass its assertion, but found issues at indexes: [2]716 2 => 7 should be > 7717 """.trimIndent()718 }719 "out-of-order elements cause error" {720 shouldThrow<AssertionError> {721 setOf(2, 3, 1) should matchEach(722 { it shouldBe 2 },723 { it shouldBe 1 },724 { it shouldBe 3 }725 )726 }.message shouldBe """727 Expected each element to pass its assertion, but found issues at indexes: [1, 2]728 1 => expected:<1> but was:<3>729 2 => expected:<3> but was:<1>730 """.trimIndent()731 }732 "gaps cause errors" {733 shouldThrow<AssertionError> {734 listOf(1, 1, 2, 2, 3, 3) should matchEach(735 { it shouldBe 1 },736 { it shouldBe 2 },737 { it shouldBe 3 }738 )739 }.message shouldBe """740 Expected each element to pass its assertion, but found issues at indexes: [1, 2, 3, 4, 5]741 1 => expected:<2> but was:<1>742 2 => expected:<3> but was:<2>743 3 => Element has no corresponding assertion. Only 3 assertions provided744 4 => Element has no corresponding assertion. Only 3 assertions provided745 5 => Element has no corresponding assertion. Only 3 assertions provided746 """.trimIndent()747 }748 }749 "existInOrder" should {750 "test that a collection matches the predicates in the given order, duplicates permitted" {751 val col = listOf(1, 1, 2, 2, 3, 3)752 col should existInOrder(753 { it == 1 },754 { it == 2 },755 { it == 3 }756 )757 col should existInOrder({ it == 1 })758 shouldThrow<AssertionError> {759 col should existInOrder(760 { it == 1 },761 { it == 2 },762 { it == 6 }763 )764 }765 shouldThrow<AssertionError> {766 col should existInOrder({ it == 4 })767 }768 shouldThrow<AssertionError> {769 col should existInOrder(770 { it == 2 },771 { it == 1 },772 { it == 3 }773 )774 }775 }776 "work with unsorted collections" {777 val actual = listOf(5, 3, 1, 2, 4, 2)778 actual should existInOrder(779 { it == 3 },780 { it == 2 },781 { it == 2 }782 )783 }784 }785 "Contain any" should {786 "Fail when the list is empty" {787 shouldThrow<AssertionError> {788 listOf(1, 2, 3).shouldContainAnyOf(emptyList())789 }.shouldHaveMessage("Asserting content on empty collection. Use Collection.shouldBeEmpty() instead.")790 }791 "Pass when one element is in the list" {792 listOf(1, 2, 3).shouldContainAnyOf(1)793 }794 "Pass when all elements are in the list" {795 listOf(1, 2, 3).shouldContainAnyOf(1, 2, 3)796 }797 "Fail when no element is in the list" {798 shouldThrow<AssertionError> {799 listOf(1, 2, 3).shouldContainAnyOf(4)800 }.shouldHaveMessage("Collection [1, 2, 3] should contain any of [4]")801 }802 }803 "Contain any (negative)" should {804 "Fail when the list is empty" {805 shouldThrow<AssertionError> {806 listOf(1, 2, 3).shouldNotContainAnyOf(emptyList())807 }.shouldHaveMessage("Asserting content on empty collection. Use Collection.shouldBeEmpty() instead.")808 }809 "Pass when no element is present in the list" {810 listOf(1, 2, 3).shouldNotContainAnyOf(4)811 }812 "Fail when one element is in the list" {813 shouldThrow<AssertionError> {814 listOf(1, 2, 3).shouldNotContainAnyOf(1)815 }.shouldHaveMessage("Collection [1, 2, 3] should not contain any of [1]")816 }817 "Fail when all elements are in the list" {818 shouldThrow<AssertionError> {819 listOf(1, 2, 3).shouldNotContainAnyOf(1, 2, 3)820 }.shouldHaveMessage("Collection [1, 2, 3] should not contain any of [1, 2, 3]")821 }822 }823 "Be in" should {824 "Pass when the element is in the list" {825 val foo = Foo("Bar")826 val list = listOf(foo)827 foo shouldBeIn list828 }829 "Fail when the element is not in the list" {830 val foo1 = Foo("Bar")831 val foo2 = Foo("Booz")832 val list = listOf(foo1)833 shouldThrow<AssertionError> {834 foo2.shouldBeIn(list)835 }.shouldHaveMessage("Collection should contain Foo(bar=Booz), but doesn't. Possible values: [Foo(bar=Bar)]")836 }837 "Pass when there's an equal element, but not the same instance in the list" {838 val foo1 = Foo("Bar")839 val foo2 = Foo("Bar")840 val list = listOf(foo1)841 shouldNotThrow<AssertionError> { foo2 shouldBeIn list }842 }843 "Pass when there's an equal element, but not the same instance in the array" {844 val foo1 = Foo("Bar")845 val foo2 = Foo("Bar")846 val list = arrayOf(foo1)847 shouldNotThrow<AssertionError> { foo2 shouldBeIn list }848 }849 "Fail when the list is empty" {850 val foo = Foo("Bar")851 val list = emptyList<Foo>()852 shouldThrow<AssertionError> {853 foo shouldBeIn list854 }.shouldHaveMessage("Asserting content on empty collection. Use Collection.shouldBeEmpty() instead.")855 }856 }857 "Be in (negative)" should {858 "Fail when the element is in the list" {859 val foo = Foo("Bar")860 val list = listOf(foo)861 shouldThrow<AssertionError> {862 foo shouldNotBeIn list863 }.shouldHaveMessage("Collection should not contain Foo(bar=Bar), but does. Forbidden values: [Foo(bar=Bar)]")864 }865 "Pass when the element is not in the list" {866 val foo1 = Foo("Bar")867 val foo2 = Foo("Booz")868 val list = listOf(foo1)869 shouldNotThrow<AssertionError> {870 foo2.shouldNotBeIn(list)871 }872 }873 "Fail when there's an equal element, but not the same instance in the list" {874 val foo1 = Foo("Bar")875 val foo2 = Foo("Bar")876 val list = listOf(foo1)877 shouldThrow<AssertionError> {878 foo2 shouldNotBeIn list879 }.shouldHaveMessage("Collection should not contain Foo(bar=Bar), but does. Forbidden values: [Foo(bar=Bar)]")880 }881 "Fail when the list is empty" {882 val foo = Foo("Bar")883 val list = emptyList<Foo>()884 shouldThrow<AssertionError> {885 foo shouldNotBeIn list886 }.shouldHaveMessage("Asserting content on empty collection. Use Collection.shouldBeEmpty() instead.")887 }888 }889 }890}891private data class Foo(val bar: String)892sealed class TestSealed {893 data class Test1(val value: String) : TestSealed()894 data class Test2(val value: Int) : TestSealed()895}...

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matchers.kt

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1package io.kotest.matchers.collections2import io.kotest.assertions.show.show3import io.kotest.matchers.Matcher4import io.kotest.matchers.MatcherResult5import io.kotest.matchers.neverNullMatcher6import io.kotest.matchers.should7import io.kotest.matchers.shouldHave8import io.kotest.matchers.shouldNot9import kotlin.jvm.JvmName10fun <T> Iterable<T>.shouldContainOnlyNulls() = toList().shouldContainOnlyNulls()11fun <T> Array<T>.shouldContainOnlyNulls() = asList().shouldContainOnlyNulls()12fun <T> Collection<T>.shouldContainOnlyNulls() = this should containOnlyNulls()13fun <T> Iterable<T>.shouldNotContainOnlyNulls() = toList().shouldNotContainOnlyNulls()14fun <T> Array<T>.shouldNotContainOnlyNulls() = asList().shouldNotContainOnlyNulls()15fun <T> Collection<T>.shouldNotContainOnlyNulls() = this shouldNot containOnlyNulls()16fun <T> containOnlyNulls() = object : Matcher<Collection<T>> {17 override fun test(value: Collection<T>) =18 MatcherResult(19 value.all { it == null },20 "Collection should contain only nulls",21 "Collection should not contain only nulls"22 )23}24fun <T> Iterable<T>.shouldContainNull() = toList().shouldContainNull()25fun <T> Array<T>.shouldContainNull() = asList().shouldContainNull()26fun <T> Collection<T>.shouldContainNull() = this should containNull()27fun <T> Iterable<T>.shouldNotContainNull() = toList().shouldNotContainNull()28fun <T> Array<T>.shouldNotContainNull() = asList().shouldNotContainNull()29fun <T> Collection<T>.shouldNotContainNull() = this shouldNot containNull()30fun <T> containNull() = object : Matcher<Collection<T>> {31 override fun test(value: Collection<T>) =32 MatcherResult(33 value.any { it == null },34 "Collection should contain at least one null",35 "Collection should not contain any nulls"36 )37}38fun <T> Iterable<T>.shouldHaveElementAt(index: Int, element: T) = toList().shouldHaveElementAt(index, element)39fun <T> Array<T>.shouldHaveElementAt(index: Int, element: T) = asList().shouldHaveElementAt(index, element)40fun <T> List<T>.shouldHaveElementAt(index: Int, element: T) = this should haveElementAt(index, element)41fun <T> Iterable<T>.shouldNotHaveElementAt(index: Int, element: T) = toList().shouldNotHaveElementAt(index, element)42fun <T> Array<T>.shouldNotHaveElementAt(index: Int, element: T) = asList().shouldNotHaveElementAt(index, element)43fun <T> List<T>.shouldNotHaveElementAt(index: Int, element: T) = this shouldNot haveElementAt(index, element)44fun <T, L : List<T>> haveElementAt(index: Int, element: T) = object : Matcher<L> {45 override fun test(value: L) =46 MatcherResult(47 value[index] == element,48 { "Collection should contain ${element.show().value} at index $index" },49 { "Collection should not contain ${element.show().value} at index $index" }50 )51}52fun <T> Iterable<T>.shouldContainNoNulls() = toList().shouldContainNoNulls()53fun <T> Array<T>.shouldContainNoNulls() = asList().shouldContainNoNulls()54fun <T> Collection<T>.shouldContainNoNulls() = this should containNoNulls()55fun <T> Iterable<T>.shouldNotContainNoNulls() = toList().shouldNotContainNoNulls()56fun <T> Array<T>.shouldNotContainNoNulls() = asList().shouldNotContainNoNulls()57fun <T> Collection<T>.shouldNotContainNoNulls() = this shouldNot containNoNulls()58fun <T> containNoNulls() = object : Matcher<Collection<T>> {59 override fun test(value: Collection<T>) =60 MatcherResult(61 value.all { it != null },62 { "Collection should not contain nulls" },63 { "Collection should have at least one null" }64 )65}66infix fun <T> Array<T>.shouldNotContainExactlyInAnyOrder(expected: Array<T>) =67 asList().shouldNotContainExactlyInAnyOrder(expected.asList())68infix fun <T, C : Collection<T>> C?.shouldNotContainExactlyInAnyOrder(expected: C) =69 this shouldNot containExactlyInAnyOrder(expected)70fun <T, C : Collection<T>> C?.shouldNotContainExactlyInAnyOrder(vararg expected: T) =71 this shouldNot containExactlyInAnyOrder(*expected)72infix fun <T> Array<T>.shouldContainExactlyInAnyOrder(expected: Array<T>) =73 asList().shouldContainExactlyInAnyOrder(expected.asList())74infix fun <T, C : Collection<T>> C?.shouldContainExactlyInAnyOrder(expected: C) =75 this should containExactlyInAnyOrder(expected)76fun <T, C : Collection<T>> C?.shouldContainExactlyInAnyOrder(vararg expected: T) =77 this should containExactlyInAnyOrder(*expected)78fun <T> containExactlyInAnyOrder(vararg expected: T): Matcher<Collection<T>?> =79 containExactlyInAnyOrder(expected.asList())80/​** Assert that a collection contains exactly the given values and nothing else, in any order. */​81fun <T, C : Collection<T>> containExactlyInAnyOrder(expected: C): Matcher<C?> = neverNullMatcher { value ->82 val valueGroupedCounts: Map<T, Int> = value.groupBy { it }.mapValues { it.value.size }83 val expectedGroupedCounts: Map<T, Int> = expected.groupBy { it }.mapValues { it.value.size }84 val passed = expectedGroupedCounts.size == valueGroupedCounts.size85 && expectedGroupedCounts.all { valueGroupedCounts[it.key] == it.value }86 MatcherResult(87 passed,88 "Collection should contain ${expected.show().value} in any order, but was ${value.show().value}",89 "Collection should not contain exactly ${expected.show().value} in any order"90 )91}92infix fun <T : Comparable<T>> Iterable<T>.shouldHaveUpperBound(t: T) = toList().shouldHaveUpperBound(t)93infix fun <T : Comparable<T>> Array<T>.shouldHaveUpperBound(t: T) = asList().shouldHaveUpperBound(t)94infix fun <T : Comparable<T>, C : Collection<T>> C.shouldHaveUpperBound(t: T) = this should haveUpperBound(t)95fun <T : Comparable<T>, C : Collection<T>> haveUpperBound(t: T) = object : Matcher<C> {96 override fun test(value: C) = MatcherResult(97 value.all { it <= t },98 "Collection should have upper bound $t",99 "Collection should not have upper bound $t"100 )101}102infix fun <T : Comparable<T>> Iterable<T>.shouldHaveLowerBound(t: T) = toList().shouldHaveLowerBound(t)103infix fun <T : Comparable<T>> Array<T>.shouldHaveLowerBound(t: T) = asList().shouldHaveLowerBound(t)104infix fun <T : Comparable<T>, C : Collection<T>> C.shouldHaveLowerBound(t: T) = this should haveLowerBound(t)105fun <T : Comparable<T>, C : Collection<T>> haveLowerBound(t: T) = object : Matcher<C> {106 override fun test(value: C) = MatcherResult(107 value.all { t <= it },108 "Collection should have lower bound $t",109 "Collection should not have lower bound $t"110 )111}112fun <T> Iterable<T>.shouldBeUnique() = toList().shouldBeUnique()113fun <T> Array<T>.shouldBeUnique() = asList().shouldBeUnique()114fun <T> Collection<T>.shouldBeUnique() = this should beUnique()115fun <T> Iterable<T>.shouldNotBeUnique() = toList().shouldNotBeUnique()116fun <T> Array<T>.shouldNotBeUnique() = asList().shouldNotBeUnique()117fun <T> Collection<T>.shouldNotBeUnique() = this shouldNot beUnique()118fun <T> beUnique() = object : Matcher<Collection<T>> {119 override fun test(value: Collection<T>) = MatcherResult(120 value.toSet().size == value.size,121 "Collection should be Unique",122 "Collection should contain at least one duplicate element"123 )124}125fun <T> Iterable<T>.shouldContainDuplicates() = toList().shouldContainDuplicates()126fun <T> Array<T>.shouldContainDuplicates() = asList().shouldContainDuplicates()127fun <T> Collection<T>.shouldContainDuplicates() = this should containDuplicates()128fun <T> Iterable<T>.shouldNotContainDuplicates() = toList().shouldNotContainDuplicates()129fun <T> Array<T>.shouldNotContainDuplicates() = asList().shouldNotContainDuplicates()130fun <T> Collection<T>.shouldNotContainDuplicates() = this shouldNot containDuplicates()131fun <T> containDuplicates() = object : Matcher<Collection<T>> {132 override fun test(value: Collection<T>) = MatcherResult(133 value.toSet().size < value.size,134 "Collection should contain duplicates",135 "Collection should not contain duplicates"136 )137}138fun <T> beSortedWith(comparator: Comparator<in T>): Matcher<List<T>> = sortedWith(comparator)139fun <T> beSortedWith(cmp: (T, T) -> Int): Matcher<List<T>> = sortedWith(cmp)140fun <T> sortedWith(comparator: Comparator<in T>): Matcher<List<T>> = sortedWith { a, b ->141 comparator.compare(a, b)142}143fun <T> sortedWith(cmp: (T, T) -> Int): Matcher<List<T>> = object : Matcher<List<T>> {144 override fun test(value: List<T>): MatcherResult {145 val failure = value.withIndex().firstOrNull { (i, it) -> i != value.lastIndex && cmp(it, value[i + 1]) > 0 }146 val snippet = value.joinToString(",", limit = 10)147 val elementMessage = when (failure) {148 null -> ""149 else -> ". Element ${failure.value} at index ${failure.index} shouldn't precede element ${value[failure.index + 1]}"150 }151 return MatcherResult(152 failure == null,153 "List [$snippet] should be sorted$elementMessage",154 "List [$snippet] should not be sorted"155 )156 }157}158fun <T : Comparable<T>> Iterable<T>.shouldBeSorted() = toList().shouldBeSorted()159fun <T : Comparable<T>> Array<T>.shouldBeSorted() = asList().shouldBeSorted()160fun <T : Comparable<T>> List<T>.shouldBeSorted() = this should beSorted<T>()161fun <T : Comparable<T>> Iterable<T>.shouldNotBeSorted() = toList().shouldNotBeSorted()162fun <T : Comparable<T>> Array<T>.shouldNotBeSorted() = asList().shouldNotBeSorted()163fun <T : Comparable<T>> List<T>.shouldNotBeSorted() = this shouldNot beSorted<T>()164infix fun <T> Iterable<T>.shouldBeSortedWith(comparator: Comparator<in T>) = toList().shouldBeSortedWith(comparator)165infix fun <T> Array<T>.shouldBeSortedWith(comparator: Comparator<in T>) = asList().shouldBeSortedWith(comparator)166infix fun <T> List<T>.shouldBeSortedWith(comparator: Comparator<in T>) = this should beSortedWith(comparator)167infix fun <T> Iterable<T>.shouldNotBeSortedWith(comparator: Comparator<in T>) = toList().shouldNotBeSortedWith(comparator)168infix fun <T> Array<T>.shouldNotBeSortedWith(comparator: Comparator<in T>) = asList().shouldNotBeSortedWith(comparator)169infix fun <T> List<T>.shouldNotBeSortedWith(comparator: Comparator<in T>) = this shouldNot beSortedWith(comparator)170infix fun <T> Iterable<T>.shouldBeSortedWith(cmp: (T, T) -> Int) = toList().shouldBeSortedWith(cmp)171infix fun <T> Array<T>.shouldBeSortedWith(cmp: (T, T) -> Int) = asList().shouldBeSortedWith(cmp)172infix fun <T> List<T>.shouldBeSortedWith(cmp: (T, T) -> Int) = this should beSortedWith(cmp)173infix fun <T> Iterable<T>.shouldNotBeSortedWith(cmp: (T, T) -> Int) = toList().shouldNotBeSortedWith(cmp)174infix fun <T> Array<T>.shouldNotBeSortedWith(cmp: (T, T) -> Int) = asList().shouldNotBeSortedWith(cmp)175infix fun <T> List<T>.shouldNotBeSortedWith(cmp: (T, T) -> Int) = this shouldNot beSortedWith(cmp)176fun <T : Comparable<T>> Iterable<T>.shouldBeMonotonicallyIncreasing() = toList().shouldBeMonotonicallyIncreasing()177fun <T : Comparable<T>> Array<T>.shouldBeMonotonicallyIncreasing() = asList().shouldBeMonotonicallyIncreasing()178fun <T : Comparable<T>> List<T>.shouldBeMonotonicallyIncreasing() = this should beMonotonicallyIncreasing<T>()179fun <T : Comparable<T>> Iterable<T>.shouldNotBeMonotonicallyIncreasing() = toList().shouldNotBeMonotonicallyIncreasing()180fun <T : Comparable<T>> Array<T>.shouldNotBeMonotonicallyIncreasing() = asList().shouldNotBeMonotonicallyIncreasing()181fun <T : Comparable<T>> List<T>.shouldNotBeMonotonicallyIncreasing() = this shouldNot beMonotonicallyIncreasing<T>()182fun <T> List<T>.shouldBeMonotonicallyIncreasingWith(comparator: Comparator<in T>) =183 this should beMonotonicallyIncreasingWith(comparator)184fun <T> Iterable<T>.shouldBeMonotonicallyIncreasingWith(comparator: Comparator<in T>) =185 toList().shouldBeMonotonicallyIncreasingWith(comparator)186fun <T> Array<T>.shouldBeMonotonicallyIncreasingWith(comparator: Comparator<in T>) =187 asList().shouldBeMonotonicallyIncreasingWith(comparator)188fun <T> List<T>.shouldNotBeMonotonicallyIncreasingWith(comparator: Comparator<in T>) =189 this shouldNot beMonotonicallyIncreasingWith(comparator)190fun <T> Iterable<T>.shouldNotBeMonotonicallyIncreasingWith(comparator: Comparator<in T>) =191 toList().shouldNotBeMonotonicallyIncreasingWith(comparator)192fun <T> Array<T>.shouldNotBeMonotonicallyIncreasingWith(comparator: Comparator<in T>) =193 asList().shouldNotBeMonotonicallyIncreasingWith(comparator)194fun <T : Comparable<T>> Iterable<T>.shouldBeMonotonicallyDecreasing() = toList().shouldBeMonotonicallyDecreasing()195fun <T : Comparable<T>> Array<T>.shouldBeMonotonicallyDecreasing() = asList().shouldBeMonotonicallyDecreasing()196fun <T : Comparable<T>> List<T>.shouldBeMonotonicallyDecreasing() = this should beMonotonicallyDecreasing<T>()197fun <T : Comparable<T>> Iterable<T>.shouldNotBeMonotonicallyDecreasing() = toList().shouldNotBeMonotonicallyDecreasing()198fun <T : Comparable<T>> Array<T>.shouldNotBeMonotonicallyDecreasing() = asList().shouldNotBeMonotonicallyDecreasing()199fun <T : Comparable<T>> List<T>.shouldNotBeMonotonicallyDecreasing() = this shouldNot beMonotonicallyDecreasing<T>()200fun <T> List<T>.shouldBeMonotonicallyDecreasingWith(comparator: Comparator<in T>) =201 this should beMonotonicallyDecreasingWith(comparator)202fun <T> Iterable<T>.shouldBeMonotonicallyDecreasingWith(comparator: Comparator<in T>) =203 toList().shouldBeMonotonicallyDecreasingWith(comparator)204fun <T> Array<T>.shouldBeMonotonicallyDecreasingWith(comparator: Comparator<in T>) =205 asList().shouldBeMonotonicallyDecreasingWith(comparator)206fun <T> List<T>.shouldNotBeMonotonicallyDecreasingWith(comparator: Comparator<in T>) =207 this shouldNot beMonotonicallyDecreasingWith(comparator)208fun <T> Iterable<T>.shouldNotBeMonotonicallyDecreasingWith(comparator: Comparator<in T>) =209 toList().shouldNotBeMonotonicallyDecreasingWith(comparator)210fun <T> Array<T>.shouldNotBeMonotonicallyDecreasingWith(comparator: Comparator<in T>) =211 asList().shouldNotBeMonotonicallyDecreasingWith(comparator)212fun <T : Comparable<T>> Iterable<T>.shouldBeStrictlyIncreasing() = toList().shouldBeStrictlyIncreasing()213fun <T : Comparable<T>> Array<T>.shouldBeStrictlyIncreasing() = asList().shouldBeStrictlyIncreasing()214fun <T : Comparable<T>> List<T>.shouldBeStrictlyIncreasing() = this should beStrictlyIncreasing<T>()215fun <T : Comparable<T>> Iterable<T>.shouldNotBeStrictlyIncreasing() = toList().shouldNotBeStrictlyIncreasing()216fun <T : Comparable<T>> Array<T>.shouldNotBeStrictlyIncreasing() = asList().shouldNotBeStrictlyIncreasing()217fun <T : Comparable<T>> List<T>.shouldNotBeStrictlyIncreasing() = this shouldNot beStrictlyIncreasing<T>()218fun <T> List<T>.shouldBeStrictlyIncreasingWith(comparator: Comparator<in T>) =219 this should beStrictlyIncreasingWith(comparator)220fun <T> Iterable<T>.shouldBeStrictlyIncreasingWith(comparator: Comparator<in T>) =221 toList().shouldBeStrictlyIncreasingWith(comparator)222fun <T> Array<T>.shouldBeStrictlyIncreasingWith(comparator: Comparator<in T>) =223 asList().shouldBeStrictlyIncreasingWith(comparator)224fun <T> List<T>.shouldNotBeStrictlyIncreasingWith(comparator: Comparator<in T>) =225 this shouldNot beStrictlyIncreasingWith(comparator)226fun <T> Iterable<T>.shouldNotBeStrictlyIncreasingWith(comparator: Comparator<in T>) =227 toList().shouldNotBeStrictlyIncreasingWith(comparator)228fun <T> Array<T>.shouldNotBeStrictlyIncreasingWith(comparator: Comparator<in T>) =229 asList().shouldNotBeStrictlyIncreasingWith(comparator)230fun <T : Comparable<T>> Iterable<T>.shouldBeStrictlyDecreasing() = toList().shouldBeStrictlyDecreasing()231fun <T : Comparable<T>> List<T>.shouldBeStrictlyDecreasing() = this should beStrictlyDecreasing<T>()232fun <T : Comparable<T>> Iterable<T>.shouldNotBeStrictlyDecreasing() = toList().shouldNotBeStrictlyDecreasing()233fun <T : Comparable<T>> List<T>.shouldNotBeStrictlyDecreasing() = this shouldNot beStrictlyDecreasing<T>()234fun <T> List<T>.shouldBeStrictlyDecreasingWith(comparator: Comparator<in T>) =235 this should beStrictlyDecreasingWith(comparator)236fun <T> Iterable<T>.shouldBeStrictlyDecreasingWith(comparator: Comparator<in T>) =237 toList().shouldBeStrictlyDecreasingWith(comparator)238fun <T> Array<T>.shouldBeStrictlyDecreasingWith(comparator: Comparator<in T>) =239 asList().shouldBeStrictlyDecreasingWith(comparator)240fun <T> List<T>.shouldNotBeStrictlyDecreasingWith(comparator: Comparator<in T>) =241 this shouldNot beStrictlyDecreasingWith(comparator)242fun <T> Iterable<T>.shouldNotBeStrictlyDecreasingWith(comparator: Comparator<in T>) =243 toList().shouldNotBeStrictlyDecreasingWith(comparator)244fun <T> Array<T>.shouldNotBeStrictlyDecreasingWith(comparator: Comparator<in T>) =245 asList().shouldNotBeStrictlyDecreasingWith(comparator)246infix fun <T> Iterable<T>.shouldHaveSingleElement(t: T) = toList().shouldHaveSingleElement(t)247infix fun <T> Array<T>.shouldHaveSingleElement(t: T) = asList().shouldHaveSingleElement(t)248infix fun <T> Iterable<T>.shouldHaveSingleElement(p: (T) -> Boolean) = toList().shouldHaveSingleElement(p)249infix fun <T> Array<T>.shouldHaveSingleElement(p: (T) -> Boolean) = asList().shouldHaveSingleElement(p)250infix fun <T> Collection<T>.shouldHaveSingleElement(t: T) = this should singleElement(t)251infix fun <T> Collection<T>.shouldHaveSingleElement(p: (T) -> Boolean) = this should singleElement(p)252infix fun <T> Iterable<T>.shouldNotHaveSingleElement(t: T) = toList().shouldNotHaveSingleElement(t)253infix fun <T> Array<T>.shouldNotHaveSingleElement(t: T) = asList().shouldNotHaveSingleElement(t)254infix fun <T> Collection<T>.shouldNotHaveSingleElement(t: T) = this shouldNot singleElement(t)255infix fun <T> Iterable<T>.shouldHaveSize(size: Int) = toList().shouldHaveSize(size)256infix fun <T> Array<T>.shouldHaveSize(size: Int) = asList().shouldHaveSize(size)257infix fun <T> Collection<T>.shouldHaveSize(size: Int) = this should haveSize(size = size)258infix fun <T> Iterable<T>.shouldNotHaveSize(size: Int) = toList().shouldNotHaveSize(size)259infix fun <T> Array<T>.shouldNotHaveSize(size: Int) = asList().shouldNotHaveSize(size)260infix fun <T> Collection<T>.shouldNotHaveSize(size: Int) = this shouldNot haveSize(size)261/​**262 * Verifies this collection contains only one element263 *264 * This assertion is an alias to `collection shouldHaveSize 1`. This will pass if the collection have exactly one element265 * (definition of a Singleton Collection)266 *267 * ```268 * listOf(1).shouldBeSingleton() /​/​ Assertion passes269 * listOf(1, 2).shouldBeSingleton() /​/​ Assertion fails270 * ```271 *272 * @see [shouldHaveSize]273 * @see [shouldNotBeSingleton]274 * @see [shouldHaveSingleElement]275 */​276fun <T> Collection<T>.shouldBeSingleton() = this shouldHaveSize 1277fun <T> Iterable<T>.shouldBeSingleton() = toList().shouldBeSingleton()278fun <T> Array<T>.shouldBeSingleton() = asList().shouldBeSingleton()279inline fun <T> Collection<T>.shouldBeSingleton(fn: (T) -> Unit) {280 this.shouldBeSingleton()281 fn(this.first())282}283inline fun <T> Iterable<T>.shouldBeSingleton(fn: (T) -> Unit) {284 toList().shouldBeSingleton(fn)285}286inline fun <T> Array<T>.shouldBeSingleton(fn: (T) -> Unit) {287 asList().shouldBeSingleton(fn)288}289/​**290 * Verifies this collection doesn't contain only one element291 *292 * This assertion is an alias to `collection shouldNotHaveSize 1`. This will pass if the collection doesn't have exactly one element293 * (definition of a Singleton Collection)294 *295 * ```296 * listOf(1, 2).shouldNotBeSingleton() /​/​ Assertion passes297 * listOf<Int>().shouldNotBeSingleton() /​/​ Assertion passes298 * listOf(1).shouldNotBeSingleton() /​/​ Assertion fails299 * ```300 *301 * @see [shouldNotHaveSize]302 * @see [shouldBeSingleton]303 * @see [shouldNotHaveSingleElement]304 */​305fun <T> Collection<T>.shouldNotBeSingleton() = this shouldNotHaveSize 1306fun <T> Iterable<T>.shouldNotBeSingleton() = toList().shouldNotBeSingleton()307fun <T> Array<T>.shouldNotBeSingleton() = asList().shouldNotBeSingleton()308infix fun <T, U> Iterable<T>.shouldBeLargerThan(other: Collection<U>) = toList().shouldBeLargerThan(other)309infix fun <T, U> Array<T>.shouldBeLargerThan(other: Collection<U>) = asList().shouldBeLargerThan(other)310infix fun <T, U> Iterable<T>.shouldBeLargerThan(other: Iterable<U>) = toList().shouldBeLargerThan(other.toList())311infix fun <T, U> Array<T>.shouldBeLargerThan(other: Array<U>) = asList().shouldBeLargerThan(other.asList())312infix fun <T, U> Collection<T>.shouldBeLargerThan(other: Collection<U>) = this should beLargerThan(other)313fun <T, U> beLargerThan(other: Collection<U>) = object : Matcher<Collection<T>> {314 override fun test(value: Collection<T>) = MatcherResult(315 value.size > other.size,316 "Collection of size ${value.size} should be larger than collection of size ${other.size}",317 "Collection of size ${value.size} should not be larger than collection of size ${other.size}"318 )319}320infix fun <T, U> Iterable<T>.shouldBeSmallerThan(other: Collection<U>) = toList().shouldBeSmallerThan(other)321infix fun <T, U> Array<T>.shouldBeSmallerThan(other: Collection<U>) = asList().shouldBeSmallerThan(other)322infix fun <T, U> Iterable<T>.shouldBeSmallerThan(other: Iterable<U>) = toList().shouldBeSmallerThan(other.toList())323infix fun <T, U> Array<T>.shouldBeSmallerThan(other: Array<U>) = asList().shouldBeSmallerThan(other.asList())324infix fun <T, U> Collection<T>.shouldBeSmallerThan(other: Collection<U>) = this should beSmallerThan(other)325fun <T, U> beSmallerThan(other: Collection<U>) = object : Matcher<Collection<T>> {326 override fun test(value: Collection<T>) = MatcherResult(327 value.size < other.size,328 "Collection of size ${value.size} should be smaller than collection of size ${other.size}",329 "Collection of size ${value.size} should not be smaller than collection of size ${other.size}"330 )331}332infix fun <T, U> Iterable<T>.shouldBeSameSizeAs(other: Collection<U>) = toList().shouldBeSameSizeAs(other)333infix fun <T, U> Array<T>.shouldBeSameSizeAs(other: Collection<U>) = asList().shouldBeSameSizeAs(other)334infix fun <T, U> Iterable<T>.shouldBeSameSizeAs(other: Iterable<U>) = toList().shouldBeSameSizeAs(other.toList())335infix fun <T, U> Array<T>.shouldBeSameSizeAs(other: Array<U>) = asList().shouldBeSameSizeAs(other.asList())336infix fun <T, U> Collection<T>.shouldBeSameSizeAs(other: Collection<U>) = this should beSameSizeAs(other)337fun <T, U> beSameSizeAs(other: Collection<U>) = object : Matcher<Collection<T>> {338 override fun test(value: Collection<T>) = MatcherResult(339 value.size == other.size,340 "Collection of size ${value.size} should be the same size as collection of size ${other.size}",341 "Collection of size ${value.size} should not be the same size as collection of size ${other.size}"342 )343}344infix fun <T> Iterable<T>.shouldHaveAtLeastSize(n: Int) = toList().shouldHaveAtLeastSize(n)345infix fun <T> Array<T>.shouldHaveAtLeastSize(n: Int) = asList().shouldHaveAtLeastSize(n)346infix fun <T> Collection<T>.shouldHaveAtLeastSize(n: Int) = this shouldHave atLeastSize(n)347fun <T> atLeastSize(n: Int) = object : Matcher<Collection<T>> {348 override fun test(value: Collection<T>) = MatcherResult(349 value.size >= n,350 "Collection should contain at least $n elements",351 "Collection should contain less than $n elements"352 )353}354infix fun <T> Iterable<T>.shouldHaveAtMostSize(n: Int) = toList().shouldHaveAtMostSize(n)355infix fun <T> Array<T>.shouldHaveAtMostSize(n: Int) = asList().shouldHaveAtMostSize(n)356infix fun <T> Collection<T>.shouldHaveAtMostSize(n: Int) = this shouldHave atMostSize(n)357fun <T> atMostSize(n: Int) = object : Matcher<Collection<T>> {358 override fun test(value: Collection<T>) = MatcherResult(359 value.size <= n,360 "Collection should contain at most $n elements",361 "Collection should contain more than $n elements"362 )363}364infix fun <T> Iterable<T>.shouldExist(p: (T) -> Boolean) = toList().shouldExist(p)365infix fun <T> Array<T>.shouldExist(p: (T) -> Boolean) = asList().shouldExist(p)366infix fun <T> Collection<T>.shouldExist(p: (T) -> Boolean) = this should exist(p)367fun <T> exist(p: (T) -> Boolean) = object : Matcher<Collection<T>> {368 override fun test(value: Collection<T>) = MatcherResult(369 value.any { p(it) },370 "Collection should contain an element that matches the predicate $p",371 "Collection should not contain an element that matches the predicate $p"372 )373}374fun <T> Iterable<T>.shouldExistInOrder(vararg ps: (T) -> Boolean) = toList().shouldExistInOrder(ps.toList())375fun <T> Array<T>.shouldExistInOrder(vararg ps: (T) -> Boolean) = asList().shouldExistInOrder(ps.toList())376fun <T> List<T>.shouldExistInOrder(vararg ps: (T) -> Boolean) = this.shouldExistInOrder(ps.toList())377infix fun <T> Iterable<T>.shouldExistInOrder(expected: List<(T) -> Boolean>) = toList().shouldExistInOrder(expected)378infix fun <T> Array<T>.shouldExistInOrder(expected: List<(T) -> Boolean>) = asList().shouldExistInOrder(expected)379infix fun <T> List<T>.shouldExistInOrder(expected: List<(T) -> Boolean>) = this should existInOrder(expected)380infix fun <T> Iterable<T>.shouldNotExistInOrder(expected: Iterable<(T) -> Boolean>) = toList().shouldNotExistInOrder(expected.toList())381infix fun <T> Array<T>.shouldNotExistInOrder(expected: Array<(T) -> Boolean>) = asList().shouldNotExistInOrder(expected.asList())382infix fun <T> Iterable<T>.shouldNotExistInOrder(expected: List<(T) -> Boolean>) = toList().shouldNotExistInOrder(expected)383infix fun <T> Array<T>.shouldNotExistInOrder(expected: List<(T) -> Boolean>) = asList().shouldNotExistInOrder(expected)384infix fun <T> List<T>.shouldNotExistInOrder(expected: List<(T) -> Boolean>) = this shouldNot existInOrder(expected)385fun <T> Iterable<T>.shouldBeEmpty() = toList().shouldBeEmpty()386fun <T> Array<T>.shouldBeEmpty() = asList().shouldBeEmpty()387fun <T> Collection<T>.shouldBeEmpty() = this should beEmpty()388fun <T> Iterable<T>.shouldNotBeEmpty() = toList().shouldNotBeEmpty()389fun <T> Array<T>.shouldNotBeEmpty() = asList().shouldNotBeEmpty()390fun <T> Collection<T>.shouldNotBeEmpty() = this shouldNot beEmpty()391fun <T> Iterable<T>.shouldContainAnyOf(vararg ts: T) = toList().shouldContainAnyOf(ts)392fun <T> Array<T>.shouldContainAnyOf(vararg ts: T) = asList().shouldContainAnyOf(ts)393fun <T> Collection<T>.shouldContainAnyOf(vararg ts: T) = this should containAnyOf(ts.asList())394fun <T> Iterable<T>.shouldNotContainAnyOf(vararg ts: T) = toList().shouldNotContainAnyOf(ts)395fun <T> Array<T>.shouldNotContainAnyOf(vararg ts: T) = asList().shouldNotContainAnyOf(ts)396fun <T> Collection<T>.shouldNotContainAnyOf(vararg ts: T) = this shouldNot containAnyOf(ts.asList())397infix fun <T> Iterable<T>.shouldContainAnyOf(ts: Collection<T>) = toList().shouldContainAnyOf(ts)398infix fun <T> Array<T>.shouldContainAnyOf(ts: Collection<T>) = asList().shouldContainAnyOf(ts)399infix fun <T> Collection<T>.shouldContainAnyOf(ts: Collection<T>) = this should containAnyOf(ts)400infix fun <T> Iterable<T>.shouldNotContainAnyOf(ts: Collection<T>) = toList().shouldNotContainAnyOf(ts)401infix fun <T> Array<T>.shouldNotContainAnyOf(ts: Collection<T>) = asList().shouldNotContainAnyOf(ts)402infix fun <T> Collection<T>.shouldNotContainAnyOf(ts: Collection<T>) = this shouldNot containAnyOf(ts)403fun <T> containAnyOf(ts: Collection<T>) = object : Matcher<Collection<T>> {404 override fun test(value: Collection<T>): MatcherResult {405 if (ts.isEmpty()) throwEmptyCollectionError()406 return MatcherResult(407 ts.any { it in value },408 { "Collection should contain any of ${ts.joinToString(separator = ", ", limit = 10) { it.show().value }}" },409 { "Collection should not contain any of ${ts.joinToString(separator = ", ", limit = 10) { it.show().value }}" }410 )411 }412}413/​**414 * Verifies that this instance is in [collection]415 *416 * Assertion to check that this instance is in [collection]. This assertion checks by reference, and not by value,417 * therefore the exact instance must be in [collection], or this will fail.418 *419 * An empty collection will always fail. If you need to check for empty collection, use [Collection.shouldBeEmpty]420 *421 * @see [shouldNotBeOneOf]422 * @see [beOneOf]423 */​424infix fun <T> T.shouldBeOneOf(collection: Collection<T>) = this should beOneOf(collection)425/​**426 * Verifies that this instance is NOT in [collection]427 *428 * Assertion to check that this instance is not in [collection]. This assertion checks by reference, and not by value,429 * therefore the exact instance must not be in [collection], or this will fail.430 *431 * An empty collection will always fail. If you need to check for empty collection, use [Collection.shouldBeEmpty]432 *433 * @see [shouldBeOneOf]434 * @see [beOneOf]435 */​436infix fun <T> T.shouldNotBeOneOf(collection: Collection<T>) = this shouldNot beOneOf(collection)437/​**438 * Verifies that this instance is any of [any]439 *440 * Assertion to check that this instance is any of [any]. This assertion checks by reference, and not by value,441 * therefore the exact instance must be in [any], or this will fail.442 *443 * An empty collection will always fail. If you need to check for empty collection, use [Collection.shouldBeEmpty]444 *445 * @see [shouldNotBeOneOf]446 * @see [beOneOf]447 */​448fun <T> T.shouldBeOneOf(vararg any: T) = this should beOneOf(any.toList())449/​**450 * Verifies that this instance is NOT any of [any]451 *452 * Assertion to check that this instance is not any of [any]. This assertion checks by reference, and not by value,453 * therefore the exact instance must not be in [any], or this will fail.454 *455 * An empty collection will always fail. If you need to check for empty collection, use [Collection.shouldBeEmpty]456 *457 * @see [shouldNotBeOneOf]458 * @see [beOneOf]459 */​460fun <T> T.shouldNotBeOneOf(vararg any: T) = this shouldNot beOneOf(any.toList())461/​**462 * Matcher that verifies that this instance is in [collection]463 *464 * Assertion to check that this instance is in [collection]. This matcher checks by reference, and not by value,465 * therefore the exact instance must be in [collection], or this will fail.466 *467 * An empty collection will always fail. If you need to check for empty collection, use [Collection.shouldBeEmpty]468 *469 * @see [shouldBeOneOf]470 * @see [shouldNotBeOneOf]471 */​472fun <T> beOneOf(collection: Collection<T>) = object : Matcher<T> {473 override fun test(value: T): MatcherResult {474 if (collection.isEmpty()) throwEmptyCollectionError()475 val match = collection.any { it === value }476 return MatcherResult(477 match,478 "Collection should contain the instance of value, but doesn't.",479 "Collection should not contain the instance of value, but does."480 )481 }482}483/​**484 * Verifies that this element is in [collection] by comparing value485 *486 * Assertion to check that this element is in [collection]. This assertion checks by value, and not by reference,487 * therefore even if the exact instance is not in [collection] but another instance with same value is present, the488 * test will pass.489 *490 * An empty collection will always fail. If you need to check for empty collection, use [Collection.shouldBeEmpty]491 *492 * @see [shouldNotBeIn]493 * @see [beIn]494 */​495infix fun <T> T.shouldBeIn(collection: Collection<T>) = this should beIn(collection)496/​**497 * Verifies that this element is NOT any of [collection]498 *499 * Assertion to check that this element is not any of [collection]. This assertion checks by value, and not by reference,500 * therefore any instance with same value must not be in [collection], or this will fail.501 *502 * An empty collection will always fail. If you need to check for empty collection, use [Collection.shouldBeEmpty]503 *504 * @see [shouldNotBeIn]505 * @see [beIn]506 */​507infix fun <T> T.shouldNotBeIn(collection: Collection<T>) = this shouldNot beIn(collection.toList())508/​**509 * Verifies that this element is any of [any] by comparing value510 *511 * Assertion to check that this element is any of [any]. This assertion checks by value, and not by reference,512 * therefore even if the exact instance is not any of [any] but another instance with same value is present, the513 * test will pass.514 *515 * An empty collection will always fail. If you need to check for empty collection, use [Collection.shouldBeEmpty]516 *517 * @see [shouldNotBeIn]518 * @see [beIn]519 */​520fun <T> T.shouldBeIn(vararg any: T) = this should beIn(any.toList())521/​**522 * Verifies that this element is NOT any of [any]523 *524 * Assertion to check that this element is not any of [any]. This assertion checks by value, and not by reference,525 * therefore any instance with same value must not be in [any], or this will fail.526 *527 * An empty collection will always fail. If you need to check for empty collection, use [Collection.shouldBeEmpty]528 *529 * @see [shouldNotBeIn]530 * @see [beIn]531 */​532fun <T> T.shouldNotBeIn(vararg any: T) = this shouldNot beIn(any.toList())533/​**534 * Verifies that this element is in [array] by comparing value535 *536 * Assertion to check that this element is in [array]. This assertion checks by value, and not by reference,537 * therefore even if the exact instance is not in [array] but another instance with same value is present, the538 * test will pass.539 *540 * An empty array will always fail. If you need to check for empty array, use [Array.shouldBeEmpty]541 *542 * @see [shouldNotBeIn]543 * @see [beIn]544 */​545@JvmName("shouldBeInArray")546infix fun <T> T.shouldBeIn(array: Array<T>) = this should beIn(array.toList())547/​**548 * Verifies that this element is NOT any of [array]549 *550 * Assertion to check that this element is not any of [array]. This assertion checks by value, and not by reference,551 * therefore any instance with same value must not be in [array], or this will fail.552 *553 * An empty array will always fail. If you need to check for empty array, use [Array.shouldBeEmpty]554 *555 * @see [shouldNotBeIn]556 * @see [beIn]557 */​558@JvmName("shouldNotBeInArray")559infix fun <T> T.shouldNotBeIn(array: Array<T>) = this shouldNot beIn(array.toList())560/​**561 * Matcher that verifies that this element is in [collection] by comparing value562 *563 * Assertion to check that this element is in [collection]. This assertion checks by value, and not by reference,564 * therefore even if the exact instance is not in [collection] but another instance with same value is present, the565 * test will pass.566 *567 * An empty collection will always fail. If you need to check for empty collection, use [Collection.shouldBeEmpty]568 *569 * @see [shouldBeOneOf]570 * @see [shouldNotBeOneOf]571 */​572fun <T> beIn(collection: Collection<T>) = object : Matcher<T> {573 override fun test(value: T): MatcherResult {574 if (collection.isEmpty()) throwEmptyCollectionError()575 val match = value in collection576 return MatcherResult(577 match,578 "Collection should contain ${value.show().value}, but doesn't. Possible values: ${collection.show().value}",579 "Collection should not contain ${value.show().value}, but does. Forbidden values: ${collection.show().value}"580 )581 }582}583private fun throwEmptyCollectionError(): Nothing {584 throw AssertionError("Asserting content on empty collection. Use Collection.shouldBeEmpty() instead.")585}...

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FailingKotestAsserts.kt

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1package testing.failing2import arrow.core.*3import io.kotest.assertions.arrow.either.shouldBeLeft4import io.kotest.assertions.arrow.either.shouldBeRight5import io.kotest.assertions.arrow.nel.shouldContain6import io.kotest.assertions.arrow.nel.shouldContainNull7import io.kotest.assertions.arrow.option.shouldBeNone8import io.kotest.assertions.arrow.option.shouldBeSome9import io.kotest.assertions.arrow.validation.shouldBeInvalid10import io.kotest.assertions.arrow.validation.shouldBeValid11import io.kotest.assertions.asClue12import io.kotest.assertions.assertSoftly13import io.kotest.assertions.json.*14import io.kotest.assertions.throwables.shouldThrowAny15import io.kotest.assertions.throwables.shouldThrowExactly16import io.kotest.assertions.withClue17import io.kotest.matchers.Matcher18import io.kotest.matchers.MatcherResult19import io.kotest.matchers.booleans.shouldBeFalse20import io.kotest.matchers.booleans.shouldBeTrue21import io.kotest.matchers.collections.shouldBeEmpty22import io.kotest.matchers.collections.shouldBeOneOf23import io.kotest.matchers.collections.shouldBeSameSizeAs24import io.kotest.matchers.collections.shouldBeSorted25import io.kotest.matchers.collections.shouldContain26import io.kotest.matchers.date.shouldBeAfter27import io.kotest.matchers.ints.shouldBeEven28import io.kotest.matchers.ints.shouldBeGreaterThan29import io.kotest.matchers.ints.shouldBeGreaterThanOrEqual30import io.kotest.matchers.ints.shouldBeLessThan31import io.kotest.matchers.ints.shouldBeLessThanOrEqual32import io.kotest.matchers.ints.shouldBeZero33import io.kotest.matchers.maps.shouldBeEmpty34import io.kotest.matchers.maps.shouldContain35import io.kotest.matchers.maps.shouldContainKey36import io.kotest.matchers.maps.shouldContainValue37import io.kotest.matchers.nulls.shouldBeNull38import io.kotest.matchers.should39import io.kotest.matchers.shouldBe40import io.kotest.matchers.shouldNot41import io.kotest.matchers.string.shouldBeBlank42import io.kotest.matchers.string.shouldBeEmpty43import io.kotest.matchers.string.shouldBeUpperCase44import io.kotest.matchers.string.shouldContain45import io.kotest.matchers.string.shouldNotBeBlank46import java.time.LocalDate47import org.junit.jupiter.api.Test48/​**49 * Kotest assertions50 *51 * - [Kotest Assertions Documentation](https:/​/​kotest.io/​assertions/​)52 * - [Github](https:/​/​github.com/​kotest/​kotest/​)53 */​54class FailingKotestAsserts {55 @Test56 fun `General assertions`() {57 assertSoftly {58 "text" shouldBe "txet"59 "hi".shouldBeBlank()60 " ".shouldNotBeBlank()61 "hi".shouldBeEmpty()62 "hi".shouldBeUpperCase()63 "hello".shouldContain("hi")64 false.shouldBeTrue()65 true.shouldBeFalse()66 "not null".shouldBeNull()67 10 shouldBeLessThan 1068 10 shouldBeLessThanOrEqual 969 11 shouldBeGreaterThan 1170 11 shouldBeGreaterThanOrEqual 1271 9.shouldBeEven()72 1.shouldBeZero()73 }74 }75 @Test76 fun `Exception assertions`() {77 assertSoftly {78 shouldThrowExactly<IllegalArgumentException> {79 angryFunction()80 }81 shouldThrowAny {82 "I'm not throwing anything"83 }84 }85 }86 @Test87 fun `Collection assertions`() {88 assertSoftly {89 listOf(1, 2, 3).shouldBeEmpty()90 listOf(1, 2, 3) shouldContain 491 listOf(1, 3, 2).shouldBeSorted()92 listOf(1, 2, 3, 4) shouldBeSameSizeAs listOf(4, 5, 6)93 1 shouldBeOneOf listOf(2, 3)94 mapOf(1 to "one", 2 to "two", 3 to "three").shouldBeEmpty()95 mapOf(1 to "one", 2 to "two", 3 to "three") shouldContainKey 496 mapOf(1 to "one", 2 to "two", 3 to "three") shouldContainValue "five"97 mapOf(1 to "one", 2 to "two", 3 to "three") shouldContain (6 to "six")98 }99 }100 @Test101 fun `Arrow assertions`() {102 assertSoftly {103 val optionNone = none<String>()104 val optionSome = Some("I am something").toOption()105 optionSome.shouldBeNone()106 optionNone.shouldBeSome()107 val rightEither = Either.Right(1)108 val leftEither = Either.Left("ERROR!!")109 leftEither.shouldBeRight()110 leftEither shouldBeRight 1111 rightEither.shouldBeLeft()112 rightEither shouldBeLeft "ERROR!!"113 val nonEmptyList = NonEmptyList.of(1, 2, 3, 4, 5)114 nonEmptyList shouldContain 6115 nonEmptyList.shouldContainNull()116 val valid = Validated.valid()117 val invalid = Validated.invalid()118 invalid.shouldBeValid()119 valid.shouldBeInvalid()120 }121 }122 @Test123 fun `Json assertions`() {124 val jsonString = "{\"test\": \"property\", \"isTest\": true }"125 assertSoftly {126 jsonString shouldMatchJson "{\"test\": \"otherProperty\"}"127 jsonString shouldContainJsonKey "$.anotherTest"128 jsonString shouldNotContainJsonKey "$.test"129 jsonString.shouldContainJsonKeyValue("$.isTest", false)130 }131 }132 @Test133 fun `Custom assertions`() {134 assertSoftly {135 val sentMail = Mail(136 dateCreated = LocalDate.of(2020, 10, 27),137 sent = true, message = "May you have an amazing day"138 )139 val unsentMail = Mail(140 dateCreated = LocalDate.of(2020, 10, 27),141 sent = false, message = "May you have an amazing day"142 )143 /​/​ This is possible144 unsentMail.sent should beSent()145 sentMail.sent shouldNot beSent()146 /​/​ This is recommended147 unsentMail.shouldBeSent()148 sentMail.shouldNotBeSent()149 }150 }151 @Test152 fun `withClue usage`() {153 val mail = Mail(154 dateCreated = LocalDate.of(2020, 10, 27),155 sent = false, message = "May you have an amazing day"156 )157 withClue("sent field should be true") {158 mail.sent shouldBe true159 }160 mail.asClue {161 it.dateCreated shouldBeAfter LocalDate.of(2020, 10, 26)162 it.sent shouldBe true163 }164 }165 @Test166 fun `asClue usage`() {167 val mail = Mail(168 dateCreated = LocalDate.of(2020, 10, 27),169 sent = false, message = "May you have an amazing day"170 )171 mail.asClue {172 it.dateCreated shouldBeAfter LocalDate.of(2020, 10, 26)173 it.sent shouldBe true174 }175 }176 fun beSent() = object : Matcher<Boolean> {177 override fun test(value: Boolean) = MatcherResult(value, "Mail.sent should be true", "Mail.sent should be false")178 }179 fun Mail.shouldBeSent() = this.sent should beSent()180 fun Mail.shouldNotBeSent() = this.sent shouldNot beSent()181}182data class Mail(val dateCreated: LocalDate, val sent: Boolean, val message: String)183fun angryFunction() {184 throw IllegalStateException("How dare you!")185}...

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KotestAsserts.kt

Source:KotestAsserts.kt Github

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1package testing.asserts2import arrow.core.*3import io.kotest.assertions.arrow.either.shouldBeLeft4import io.kotest.assertions.arrow.either.shouldBeRight5import io.kotest.assertions.arrow.nel.shouldContain6import io.kotest.assertions.arrow.nel.shouldContainNull7import io.kotest.assertions.arrow.option.shouldBeNone8import io.kotest.assertions.arrow.option.shouldBeSome9import io.kotest.assertions.arrow.validation.shouldBeInvalid10import io.kotest.assertions.arrow.validation.shouldBeValid11import io.kotest.assertions.asClue12import io.kotest.assertions.json.*13import io.kotest.assertions.throwables.shouldThrowAny14import io.kotest.assertions.throwables.shouldThrowExactly15import io.kotest.assertions.withClue16import io.kotest.matchers.Matcher17import io.kotest.matchers.MatcherResult18import io.kotest.matchers.booleans.shouldBeFalse19import io.kotest.matchers.booleans.shouldBeTrue20import io.kotest.matchers.collections.shouldBeEmpty21import io.kotest.matchers.collections.shouldBeOneOf22import io.kotest.matchers.collections.shouldBeSameSizeAs23import io.kotest.matchers.collections.shouldBeSorted24import io.kotest.matchers.collections.shouldContain25import io.kotest.matchers.date.shouldBeAfter26import io.kotest.matchers.ints.shouldBeEven27import io.kotest.matchers.ints.shouldBeGreaterThan28import io.kotest.matchers.ints.shouldBeGreaterThanOrEqual29import io.kotest.matchers.ints.shouldBeLessThan30import io.kotest.matchers.ints.shouldBeLessThanOrEqual31import io.kotest.matchers.ints.shouldBeZero32import io.kotest.matchers.maps.shouldBeEmpty33import io.kotest.matchers.maps.shouldContain34import io.kotest.matchers.maps.shouldContainKey35import io.kotest.matchers.maps.shouldContainValue36import io.kotest.matchers.nulls.shouldBeNull37import io.kotest.matchers.should38import io.kotest.matchers.shouldBe39import io.kotest.matchers.shouldNot40import io.kotest.matchers.string.shouldBeBlank41import io.kotest.matchers.string.shouldBeEmpty42import io.kotest.matchers.string.shouldBeUpperCase43import io.kotest.matchers.string.shouldContain44import io.kotest.matchers.string.shouldNotBeBlank45import java.time.LocalDate46import org.junit.jupiter.api.Test47/​**48 * Kotest assertions49 *50 * - [Kotest Assertions Documentation](https:/​/​kotest.io/​assertions/​)51 * - [Github](https:/​/​github.com/​kotest/​kotest/​)52 */​53class KotestAsserts {54 @Test55 fun `General assertions`() {56 "text" shouldBe "text"57 " ".shouldBeBlank()58 "hi".shouldNotBeBlank()59 "".shouldBeEmpty()60 "HI".shouldBeUpperCase()61 "hello".shouldContain("ll")62 true.shouldBeTrue()63 false.shouldBeFalse()64 null.shouldBeNull()65 10 shouldBeLessThan 1166 10 shouldBeLessThanOrEqual 1067 11 shouldBeGreaterThan 1068 11 shouldBeGreaterThanOrEqual 1169 10.shouldBeEven()70 0.shouldBeZero()71 }72 @Test73 fun `Exception assertions`() {74 shouldThrowExactly<IllegalStateException> {75 angryFunction()76 }77 shouldThrowAny {78 angryFunction()79 }80 }81 @Test82 fun `Collection assertions`() {83 emptyList<Int>().shouldBeEmpty()84 listOf(1, 2, 3) shouldContain 385 listOf(1, 2, 3).shouldBeSorted()86 listOf(1, 2, 3) shouldBeSameSizeAs listOf(4, 5, 6)87 1 shouldBeOneOf listOf(1, 2, 3)88 emptyMap<Int, String>().shouldBeEmpty()89 mapOf(1 to "one", 2 to "two", 3 to "three") shouldContainKey 190 mapOf(1 to "one", 2 to "two", 3 to "three") shouldContainValue "two"91 mapOf(1 to "one", 2 to "two", 3 to "three") shouldContain (3 to "three")92 }93 @Test94 fun `Arrow assertions`() {95 val optionNone = none<String>()96 val optionSome = Some("I am something").toOption()97 optionNone.shouldBeNone()98 optionSome.shouldBeSome()99 val rightEither = Either.Right(1)100 val leftEither = Either.Left("ERROR!!")101 rightEither.shouldBeRight()102 rightEither shouldBeRight 1103 leftEither.shouldBeLeft()104 leftEither shouldBeLeft "ERROR!!"105 val nonEmptyList = NonEmptyList.of(1, 2, 3, 4, 5, null)106 nonEmptyList shouldContain 1107 nonEmptyList.shouldContainNull()108 val valid = Validated.valid()109 val invalid = Validated.invalid()110 valid.shouldBeValid()111 invalid.shouldBeInvalid()112 }113 @Test114 fun `Json assertions`() {115 val jsonString = "{\"test\": \"property\", \"isTest\": true }"116 jsonString shouldMatchJson jsonString117 jsonString shouldContainJsonKey "$.test"118 jsonString shouldNotContainJsonKey "$.notTest"119 jsonString.shouldContainJsonKeyValue("$.isTest", true)120 }121 @Test122 fun `Custom assertions`() {123 val sentMail = Mail(124 dateCreated = LocalDate.of(2020, 10, 27),125 sent = true, message = "May you have an amazing day"126 )127 val unsentMail = Mail(128 dateCreated = LocalDate.of(2020, 10, 27),129 sent = false, message = "May you have an amazing day"130 )131 /​/​ This is possible132 sentMail.sent should beSent()133 unsentMail.sent shouldNot beSent()134 /​/​ This is recommended135 sentMail.shouldBeSent()136 unsentMail.shouldNotBeSent()137 }138 @Test139 fun `withClue usage`() {140 val mail = Mail(141 dateCreated = LocalDate.of(2020, 10, 27),142 sent = false, message = "May you have an amazing day"143 )144 withClue("sent field should be false") {145 mail.sent shouldBe false146 }147 mail.asClue {148 it.dateCreated shouldBeAfter LocalDate.of(2020, 10, 26)149 it.sent shouldBe false150 }151 }152 @Test153 fun `asClue usage`() {154 val mail = Mail(155 dateCreated = LocalDate.of(2020, 10, 27),156 sent = false, message = "May you have an amazing day"157 )158 mail.asClue {159 it.dateCreated shouldBeAfter LocalDate.of(2020, 10, 26)160 it.sent shouldBe false161 }162 }163 fun beSent() = object : Matcher<Boolean> {164 override fun test(value: Boolean) = MatcherResult(value, "Mail.sent should be true", "Mail.sent should be false")165 }166 fun Mail.shouldBeSent() = this.sent should beSent()167 fun Mail.shouldNotBeSent() = this.sent shouldNot beSent()168}169data class Mail(val dateCreated: LocalDate, val sent: Boolean, val message: String)170fun angryFunction() {171 throw IllegalStateException("How dare you!")172}...

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nulls.kt

Source:nulls.kt Github

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1package io.kotest.matchers.collections2import io.kotest.matchers.Matcher3import io.kotest.matchers.MatcherResult4import io.kotest.matchers.should5import io.kotest.matchers.shouldNot6fun <T> Iterable<T>.shouldContainOnlyNulls(): Iterable<T> {7 toList().shouldContainOnlyNulls()8 return this9}10fun <T> Array<T>.shouldContainOnlyNulls(): Array<T> {11 asList().shouldContainOnlyNulls()12 return this13}14fun <T> Collection<T>.shouldContainOnlyNulls(): Collection<T> {15 this should containOnlyNulls()16 return this17}18fun <T> Iterable<T>.shouldNotContainOnlyNulls(): Iterable<T> {19 toList().shouldNotContainOnlyNulls()20 return this21}22fun <T> Array<T>.shouldNotContainOnlyNulls(): Array<T> {23 asList().shouldNotContainOnlyNulls()24 return this25}26fun <T> Collection<T>.shouldNotContainOnlyNulls(): Collection<T> {27 this shouldNot containOnlyNulls()28 return this29}30fun <T> containOnlyNulls() = object : Matcher<Collection<T>> {31 override fun test(value: Collection<T>) =32 MatcherResult(33 value.all { it == null },34 { "Collection should contain only nulls" },35 {36 "Collection should not contain only nulls"37 })38}39fun <T> Iterable<T>.shouldContainNull(): Iterable<T> {40 toList().shouldContainNull()41 return this42}43fun <T> Array<T>.shouldContainNull(): Array<T> {44 asList().shouldContainNull()45 return this46}47fun <T> Collection<T>.shouldContainNull(): Collection<T> {48 this should containNull()49 return this50}51fun <T> Iterable<T>.shouldNotContainNull(): Iterable<T> {52 toList().shouldNotContainNull()53 return this54}55fun <T> Array<T>.shouldNotContainNull(): Array<T> {56 asList().shouldNotContainNull()57 return this58}59fun <T> Collection<T>.shouldNotContainNull(): Collection<T> {60 this shouldNot containNull()61 return this62}63fun <T> containNull() = object : Matcher<Collection<T>> {64 override fun test(value: Collection<T>) =65 MatcherResult(66 value.any { it == null },67 { "Collection should contain at least one null" },68 { "Collection should not contain any nulls" })69}70fun <T> Iterable<T>.shouldContainNoNulls(): Iterable<T> {71 toList().shouldContainNoNulls()72 return this73}74fun <T> Array<T>.shouldContainNoNulls(): Array<T> {75 asList().shouldContainNoNulls()76 return this77}78fun <T> Collection<T>.shouldContainNoNulls(): Collection<T> {79 this should containNoNulls()80 return this81}82fun <T> Iterable<T>.shouldNotContainNoNulls(): Iterable<T> {83 toList().shouldNotContainNoNulls()84 return this85}86fun <T> Array<T>.shouldNotContainNoNulls(): Array<T> {87 asList().shouldNotContainNoNulls()88 return this89}90fun <T> Collection<T>.shouldNotContainNoNulls(): Collection<T> {91 this shouldNot containNoNulls()92 return this93}94fun <T> containNoNulls() = object : Matcher<Collection<T>> {95 override fun test(value: Collection<T>) =96 MatcherResult(97 value.all { it != null },98 { "Collection should not contain nulls" },99 { "Collection should have at least one null" }100 )101}...

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Collection.shouldContainNull

Using AI Code Generation

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1nulls . shouldContainNull ( listOf ( 1 , 2 , null ))2nulls . shouldNotContainNull ( listOf ( 1 , 2 ))3nulls . shouldContainNull ( listOf ( 1 , 2 , null ))4nulls . shouldNotContainNull ( listOf ( 1 , 2 ))5nulls . shouldContainNull ( listOf ( 1 , 2 , null ))6nulls . shouldNotContainNull ( listOf ( 1 , 2 ))7nulls . shouldContainNull ( listOf ( 1 , 2 , null ))8nulls . shouldNotContainNull ( listOf ( 1 , 2 ))9nulls . shouldContainNull ( listOf ( 1 , 2 , null ))10nulls . shouldNotContainNull ( listOf ( 1 , 2 ))11nulls . shouldContainNull ( listOf ( 1 , 2 , null ))12nulls . shouldNotContainNull ( listOf ( 1 , 2 ))13nulls . shouldContainNull ( listOf ( 1 , 2 , null ))

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Collection.shouldContainNull

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1 collection.shouldContainNull()2 collection.shouldNotContainNull()3 collection.shouldContainAllNulls()4 collection.shouldNotContainAllNulls()5 collection.shouldContainOnlyNulls()6}7fun <T> Collection<T>.shouldContainNull() = this should containNull()8fun <T> Collection<T>.shouldNotContainNull() = this shouldNot containNull()9fun <T> Collection<T>.shouldContainAllNulls() = this should containAllNulls()10fun <T> Collection<T>.shouldNotContainAllNulls() = this shouldNot containAllNulls()11fun <T> Collection<T>.shouldContainOnlyNulls() = this should containOnlyNulls()12fun <T> Collection<T>.shouldNotContainOnlyNulls() = this shouldNot contain

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Collection.shouldContainNull

Using AI Code Generation

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1shouldContainNull(listOf("foo", null, "bar"))2shouldContainNull(listOf("foo", null, "bar"))3shouldContainNull(listOf("foo", null, "bar"))4shouldContainNull(listOf("foo", null, "bar"))5shouldContainNull(listOf("foo", null, "bar"))6shouldContainNull(listOf("foo", null, "bar"))7shouldContainNull(listOf("foo", null, "bar"))8shouldContainNull(listOf("foo", null, "bar"))9shouldContainNull(listOf("foo", null, "bar"))10shouldContainNull(listOf("foo", null, "bar"))11shouldContainNull(listOf("foo", null, "bar"))12shouldContainNull(listOf("foo", null, "bar"))13shouldContainNull(listOf("foo", null, "bar"))14shouldContainNull(listOf("foo", null, "bar"))15shouldContainNull(listOf("foo", null, "bar"))

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