How to use strictlyDecreasingWith method of io.kotest.matchers.collections.decreasing class

Best Kotest code snippet using io.kotest.matchers.collections.decreasing.strictlyDecreasingWith

CollectionMatchersTest.kt

Source:CollectionMatchersTest.kt

...80import 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 {...

CollectionMatchers.kt

Source:CollectionMatchers.kt

...154  override fun test(value: List<T>): MatcherResult {155    return testStrictlyDecreasingWith(value, Comparator { a, b -> a.compareTo(b) })156  }157}158fun <T> beStrictlyDecreasingWith(comparator: Comparator<in T>): Matcher<List<T>> = strictlyDecreasingWith(159  comparator)160fun <T> strictlyDecreasingWith(comparator: Comparator<in T>): Matcher<List<T>> = object : Matcher<List<T>> {161  override fun test(value: List<T>): MatcherResult {162    return testStrictlyDecreasingWith(value, comparator)163  }164}165private fun <T> testStrictlyDecreasingWith(value: List<T>, comparator: Comparator<in T>): MatcherResult {166  val failure = value.zipWithNext().withIndex().find { (_, pair) -> comparator.compare(pair.first, pair.second) <= 0 }167  val snippet = value.show().value168  val elementMessage = when (failure) {169    null -> ""170    else -> ". Element ${failure.value.second} at index ${failure.index + 1} was not strictly decreased from previous element."171  }172  return MatcherResult(173    failure == null,174    { "List [$snippet] should be strictly decreasing$elementMessage" },...

decreasing.kt

Source:decreasing.kt

...102      return testStrictlyDecreasingWith(value) { a, b -> a.compareTo(b) }103   }104}105fun <T> beStrictlyDecreasingWith(comparator: Comparator<in T>): Matcher<List<T>> =106   strictlyDecreasingWith(comparator)107fun <T> strictlyDecreasingWith(comparator: Comparator<in T>): Matcher<List<T>> = object : Matcher<List<T>> {108   override fun test(value: List<T>): MatcherResult {109      return testStrictlyDecreasingWith(value, comparator)110   }111}112private fun <T> testStrictlyDecreasingWith(value: List<T>, comparator: Comparator<in T>): MatcherResult {113   val failure = value.zipWithNext().withIndex().find { (_, pair) -> comparator.compare(pair.first, pair.second) <= 0 }114   val snippet = value.print().value115   val elementMessage = when (failure) {116      null -> ""117      else -> ". Element ${failure.value.second} at index ${failure.index + 1} was not strictly decreased from previous element."118   }119   return MatcherResult(120      failure == null,121      { "List [$snippet] should be strictly decreasing$elementMessage" },...

strictlyDecreasingWith

Using AI Code Generation

1val list = listOf(3, 2, 1)2list should strictlyDecreasingWith(Int::compareTo)3val list = listOf(1, 2, 3)4list should strictlyIncreasingWith(Int::compareTo)5val list = listOf(1, 2, 3)6list should strictlyIncreasingWith(Int::compareTo)7val list = listOf(1, 2, 3)8list should strictlyIncreasingWith(Int::compareTo)9val list = listOf(1, 2, 3)10list should strictlyIncreasingWith(Int::compareTo)11val list = listOf(1, 2, 3)12list should strictlyIncreasingWith(Int::compareTo)13val list = listOf(1, 2, 3)14list should strictlyIncreasingWith(Int::compareTo)15val list = listOf(1, 2, 3)16list should strictlyIncreasingWith(Int::compareTo)17val list = listOf(1, 2, 3)18list should strictlyIncreasingWith(Int::compareTo)19val list = listOf(1, 2, 3)20list should strictlyIncreasingWith(Int::compareTo)21val list = listOf(1, 2, 3)22list should strictlyIncreasingWith(Int::compareTo)23val list = listOf(1, 2, 3)24list should strictlyIncreasingWith(Int::compareTo)

strictlyDecreasingWith

Using AI Code Generation

1import io.kotest.matchers.collections.decreasing2val list = listOf(3, 2, 1)3list should strictlyDecreasingWith (Int::compareTo)4import io.kotest.matchers.collections.increasing5val list = listOf(1, 2, 3)6list should strictlyIncreasingWith (Int::compareTo)7import io.kotest.matchers.collections.increasing8val list = listOf(1, 2, 3)9list should strictlyIncreasingWith (Int::compareTo)10import io.kotest.matchers.collections.increasing11val list = listOf(1, 2, 3)12list should strictlyIncreasingWith (Int::compareTo)13import io.kotest.matchers.collections.increasing14val list = listOf(1, 2, 3)15list should strictlyIncreasingWith (Int::compareTo)16import io.kotest.matchers.collections.increasing17val list = listOf(1, 2, 3)18list should strictlyIncreasingWith (Int::compareTo)19import io.kotest.matchers.collections.increasing20val list = listOf(1, 2, 3)21list should strictlyIncreasingWith (Int::compareTo)22import io.kotest.matchers.collections.increasing23val list = listOf(1, 2, 3)24list should strictlyIncreasingWith (Int::compareTo)25import io.kotest.matchers.collections.increasing26val list = listOf(1, 2, 3)27list should strictlyIncreasingWith (Int::compareTo)28import io.kotest.matchers.collections.increasing

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