How to use Sequence.shouldBeUnique method of io.kotest.matchers.sequences.matchers class

Best Kotest code snippet using io.kotest.matchers.sequences.matchers.Sequence.shouldBeUnique

SequenceMatchersTest.kt

Source:SequenceMatchersTest.kt Github

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1package com.sksamuel.kotest.matchers.collections2import io.kotest.assertions.throwables.shouldThrow3import io.kotest.assertions.throwables.shouldThrowAny4import io.kotest.core.spec.style.WordSpec5import io.kotest.core.spec.style.scopes.WordSpecTerminalScope6import io.kotest.core.spec.style.scopes.WordSpecShouldContainerScope7import io.kotest.matchers.sequences.shouldBeLargerThan8import io.kotest.matchers.sequences.shouldBeSameCountAs9import io.kotest.matchers.sequences.shouldBeSmallerThan10import io.kotest.matchers.sequences.shouldBeSorted11import io.kotest.matchers.sequences.shouldBeSortedWith12import io.kotest.matchers.sequences.shouldBeUnique13import io.kotest.matchers.sequences.shouldContain14import io.kotest.matchers.sequences.shouldContainAll15import io.kotest.matchers.sequences.shouldContainAllInAnyOrder16import io.kotest.matchers.sequences.shouldContainDuplicates17import io.kotest.matchers.sequences.shouldContainExactly18import io.kotest.matchers.sequences.shouldContainInOrder19import io.kotest.matchers.sequences.shouldContainNoNulls20import io.kotest.matchers.sequences.shouldContainNull21import io.kotest.matchers.sequences.shouldContainOnlyNulls22import io.kotest.matchers.sequences.shouldExist23import io.kotest.matchers.sequences.shouldHaveAtLeastCount24import io.kotest.matchers.sequences.shouldHaveAtMostCount25import io.kotest.matchers.sequences.shouldHaveCount26import io.kotest.matchers.sequences.shouldHaveElementAt27import io.kotest.matchers.sequences.shouldHaveLowerBound28import io.kotest.matchers.sequences.shouldHaveSingleElement29import io.kotest.matchers.sequences.shouldHaveUpperBound30import io.kotest.matchers.sequences.shouldNotBeSorted31import io.kotest.matchers.sequences.shouldNotBeSortedWith32import io.kotest.matchers.sequences.shouldNotBeUnique33import io.kotest.matchers.sequences.shouldNotContain34import io.kotest.matchers.sequences.shouldNotContainAllInAnyOrder35import io.kotest.matchers.sequences.shouldNotContainExactly36import io.kotest.matchers.sequences.shouldNotContainNoNulls37import io.kotest.matchers.sequences.shouldNotContainNull38import io.kotest.matchers.sequences.shouldNotContainOnlyNulls39import io.kotest.matchers.sequences.shouldNotHaveCount40import io.kotest.matchers.sequences.shouldNotHaveElementAt41class SequenceMatchersTest : WordSpec() {42 /​* PassFail */​43 private suspend fun WordSpecShouldContainerScope.pass(name: String, test: suspend WordSpecTerminalScope.() -> Unit) {44 ("succeed $name")(test)45 }46 private suspend fun WordSpecShouldContainerScope.succeed(name: String, test: suspend WordSpecTerminalScope.() -> Unit) = pass(name, test)47 fun WordSpecShouldContainerScope.fail(msg: String): Nothing = io.kotest.assertions.fail(msg)48 suspend fun WordSpecShouldContainerScope.fail(name: String, test: () -> Any?) {49 ("fail $name") { shouldThrowAny(test) }50 }51 suspend inline fun <reified E : Throwable> WordSpecShouldContainerScope.abort(name: String, crossinline test: () -> Any?) {52 ("abort $name") { shouldThrow<E>(test) }53 }54 suspend inline fun <reified E : Throwable> WordSpecShouldContainerScope.`throw`(name: String, crossinline test: () -> Any?) = abort<E>(55 name,56 test)57 /​* sample data */​58 val empty = emptySequence<Int>()59 val single = sequenceOf(0)60 val nulls = sequenceOf<Int?>(null, null, null, null)61 val sparse = sequenceOf(null, null, null, 3)62 val countup = (0..10).asSequence()63 val countdown = (10 downTo 0).asSequence()64 val unique = sequenceOf(3, 2, 1)65 val repeating = sequenceOf(1, 2, 3, 1, 2, 3)66 val asc = { a: Int, b: Int -> a - b }67 val desc = { a: Int, b: Int -> b - a }68 /​* tests */​69 init {70 /​* count */​71 "have count" should {72 succeed("for empty when 0") {73 empty.shouldHaveCount(0)74 }75 fail("for empty when non-zero") {76 empty.shouldHaveCount(1)77 }78 succeed("for single when 1") {79 single.shouldHaveCount(1)80 }81 fail("for single when 0") {82 single.shouldHaveCount(0)83 }84 "match count() for multiple" {85 sparse.shouldHaveCount(sparse.count())86 }87 fail("to mis-match count() for multiple") {88 sparse.shouldHaveCount(sparse.count() - 1)89 }90 }91 "not have count" should {92 fail("for empty when non-zero") {93 empty.shouldNotHaveCount(0)94 }95 succeed("for empty when non-zero") {96 empty.shouldNotHaveCount(1)97 }98 fail("for single when 1") {99 single.shouldNotHaveCount(1)100 }101 succeed("for single when 0") {102 single.shouldNotHaveCount(0)103 }104 fail("to match count() for multiple") {105 sparse.shouldNotHaveCount(sparse.count())106 }107 "mis-match count() for multiple" {108 sparse.shouldNotHaveCount(sparse.count() - 1)109 }110 }111 "larger than" should {112 fail("for empty") {113 empty.shouldBeLargerThan(single)114 }115 succeed("with empty") {116 single.shouldBeLargerThan(empty)117 }118 fail("for smaller") {119 nulls.shouldBeLargerThan(countup)120 }121 fail("for same count") {122 countup.shouldBeLargerThan(countdown)123 }124 succeed("for larger") {125 countup.shouldBeLargerThan(nulls)126 }127 }128 "smaller than" should {129 succeed("for empty") {130 empty.shouldBeSmallerThan(single)131 }132 fail("with empty") {133 single.shouldBeSmallerThan(empty)134 }135 succeed("for smaller") {136 nulls.shouldBeSmallerThan(countup)137 }138 fail("for same count") {139 countup.shouldBeSmallerThan(countdown)140 }141 fail("for larger") {142 countup.shouldBeSmallerThan(nulls)143 }144 }145 "same count" should {146 fail("for empty with any") {147 empty.shouldBeSameCountAs(single)148 }149 fail("for any with empty") {150 nulls.shouldBeSameCountAs(empty)151 }152 fail("for smaller") {153 nulls.shouldBeSameCountAs(countup)154 }155 succeed("with same count") {156 countup.shouldBeSameCountAs(countdown)157 }158 fail("for larger") {159 countup.shouldBeSmallerThan(nulls)160 }161 }162 "at least count" should {163 succeed("for empty with -1") {164 empty.shouldHaveAtLeastCount(-1)165 }166 succeed("for any with -1") {167 countup.shouldHaveAtLeastCount(-1)168 }169 succeed("for empty with 0") {170 empty.shouldHaveAtLeastCount(0)171 }172 fail("for empty with 1") {173 empty.shouldHaveAtLeastCount(1)174 }175 succeed("for smaller count") {176 single.shouldHaveAtLeastCount(0)177 }178 succeed("for same count") {179 nulls.shouldHaveAtLeastCount(nulls.count())180 }181 fail("for larger count") {182 countup.shouldHaveAtLeastCount(countup.count() + 1)183 }184 }185 "at most count" should {186 fail("for empty with -1") {187 empty.shouldHaveAtMostCount(-1)188 }189 succeed("for empty with 0") {190 empty.shouldHaveAtMostCount(0)191 }192 succeed("for empty with 1") {193 empty.shouldHaveAtMostCount(1)194 }195 fail("for smaller count") {196 countup.shouldHaveAtMostCount(countup.count() - 1)197 }198 succeed("for same count") {199 countup.shouldHaveAtMostCount(countup.count())200 }201 succeed("for larger count") {202 countup.shouldHaveAtMostCount(countup.count() + 1)203 }204 }205 /​* contain */​206 /​** null */​207 "contain only nulls" should {208 succeed("for empty") {209 empty.shouldContainOnlyNulls()210 }211 fail("for single") {212 single.shouldContainOnlyNulls()213 }214 succeed("for nulls") {215 nulls.shouldContainOnlyNulls()216 }217 fail("for sparse") {218 sparse.shouldContainOnlyNulls()219 }220 }221 "not contain only nulls" should {222 fail("for empty") {223 empty.shouldNotContainOnlyNulls()224 }225 "fail for single" {226 single.shouldNotContainOnlyNulls()227 }228 fail("for nulls") {229 nulls.shouldNotContainOnlyNulls()230 }231 succeed("for sparse") {232 sparse.shouldNotContainOnlyNulls()233 }234 }235 "contain a null" should {236 fail("for empty") {237 empty.shouldContainNull()238 }239 fail("for non-nulls") {240 single.shouldContainNull()241 }242 succeed("for nulls") {243 nulls.shouldContainNull()244 }245 succeed("for sparse") {246 sparse.shouldContainNull()247 }248 }249 "not contain a null" should {250 succeed("for empty") {251 empty.shouldNotContainNull()252 }253 succeed("for non-nulls") {254 single.shouldNotContainNull()255 }256 fail("for nulls") {257 nulls.shouldNotContainNull()258 }259 fail("for sparse") {260 sparse.shouldNotContainNull()261 }262 }263 "contain no nulls" should {264 succeed("for empty") {265 empty.shouldContainNoNulls()266 }267 succeed("for non-nulls") {268 single.shouldContainNoNulls()269 }270 fail("for nulls") {271 nulls.shouldContainNoNulls()272 }273 fail("for sparse") {274 sparse.shouldContainNoNulls()275 }276 }277 "not contain no nulls" should {278 fail("for empty") {279 empty.shouldNotContainNoNulls()280 }281 fail("for non-nulls") {282 single.shouldNotContainNoNulls()283 }284 succeed("for nulls") {285 nulls.shouldNotContainNoNulls()286 }287 succeed("for sparse") {288 sparse.shouldNotContainNoNulls()289 }290 }291 /​** single-value */​292 "single element" should {293 fail("for empty") {294 empty.shouldHaveSingleElement(null)295 }296 succeed("for single") {297 single.shouldHaveSingleElement(single.first())298 }299 fail("for multiple") {300 nulls.shouldHaveSingleElement(null)301 }302 }303 "have element at" should {304 abort<IndexOutOfBoundsException>("for empty") {305 empty.shouldHaveElementAt(empty.count(), 0)306 }307 abort<IndexOutOfBoundsException>("when an element after the end is requested") {308 nulls.shouldHaveElementAt(nulls.count(), 0)309 }310 succeed("when the sequence has the element") {311 countup.shouldHaveElementAt(10, 10)312 }313 fail("when the sequence doesn't have the element") {314 countdown.shouldHaveElementAt(10, 10)315 }316 }317 "not have element at" should {318 abort<IndexOutOfBoundsException>("for empty") {319 empty.shouldNotHaveElementAt(empty.count(), 0)320 }321 abort<IndexOutOfBoundsException>("when an element after the end is requested") {322 nulls.shouldNotHaveElementAt(nulls.count(), 0)323 }324 fail("when the sequence has the element") {325 countup.shouldNotHaveElementAt(10, 10)326 }327 succeed("when the sequence doesn't have the element") {328 countdown.shouldNotHaveElementAt(10, 10)329 }330 }331 "contain" should {332 fail("for empty") {333 empty.shouldContain(0)334 }335 succeed("when the sequence contains the value") {336 countup.shouldContain(2)337 }338 fail("when the sequence doesn't contain the value") {339 sparse.shouldContain(2)340 }341 }342 "not contain" should {343 succeed("for empty") {344 empty.shouldNotContain(0)345 }346 fail("when the sequence contains the value") {347 countup.shouldNotContain(2)348 }349 succeed("when the sequence doesn't contain the value") {350 sparse.shouldNotContain(2)351 }352 }353 "exist" should {354 fail("for empty") {355 empty.shouldExist { true }356 }357 succeed("when always true") {358 single.shouldExist { true }359 }360 fail("when always false") {361 countup.shouldExist { false }362 }363 succeed("when matches at least one") {364 countdown.shouldExist { it % 5 == 4 }365 }366 fail("when matches none") {367 countdown.shouldExist { it > 20 }368 }369 }370 /​** multiple-value */​371 "contain all" should {372 succeed("for empty with empty") {373 empty.shouldContainAll(empty)374 }375 succeed("for empty with empty (variadic)") {376 empty.shouldContainAll()377 }378 fail("for empty with any other") {379 empty.shouldContainAll(single)380 }381 succeed("for any with empty") {382 single.shouldContainAll(empty)383 }384 succeed("for any with empty (variadic)") {385 single.shouldContainAll()386 }387 succeed("for subset of nulls") {388 sparse.shouldContainAll(nulls)389 }390 succeed("for subset of nulls (variadic)") {391 sparse.shouldContainAll(null, null)392 }393 succeed("for subset in order (variadic)") {394 countdown.shouldContainAll(2, 3, 5, 7)395 }396 succeed("for subset not in order (variadic)") {397 countdown.shouldContainAll(2, 5, 3, 7)398 }399 succeed("for same elements") {400 repeating.shouldContainAll(unique)401 }402 succeed("for same elements (variadic)") {403 repeating.shouldContainAll(2, 3, 1)404 }405 succeed("for same elements, repeated") {406 unique.shouldContainAll(repeating)407 }408 succeed("for same elements, repeated (variadic)") {409 unique.shouldContainAll(1, 2, 3, 1, 2, 3)410 }411 }412 "contain exactly empty" should {413 succeed("for empty") {414 empty.shouldContainExactly(sequenceOf<Int>())415 }416 succeed("for empty (variadic)") {417 empty.shouldContainExactly()418 }419 fail("for single") {420 single.shouldContainExactly(empty)421 }422 "fail for single (variadic)" {423 shouldThrowAny {424 single.shouldContainExactly()425 }426 }427 fail("for multiple") {428 nulls.shouldContainExactly(empty)429 }430 fail("for multiple (variadic)") {431 nulls.shouldContainExactly()432 }433 }434 "contain exactly non-empty" should {435 val nonempty = sparse;436 fail("for empty") {437 empty.shouldContainExactly(nonempty)438 }439 fail("for empty (variadic)") {440 empty.shouldContainExactly(*nonempty.toList().toTypedArray())441 }442 succeed("for same") {443 sparse.shouldContainExactly(nonempty)444 }445 succeed("for same (variadic)") {446 sparse.shouldContainExactly(*sparse.toList().toTypedArray())447 }448 fail("for another of different size") {449 countup.shouldContainExactly(nonempty)450 }451 fail("for another of different size (variadic)") {452 countup.shouldContainExactly(*nonempty.toList().toTypedArray())453 }454 fail("for another of same size") {455 nulls.shouldContainExactly(nonempty)456 }457 fail("for another of same size (variadic)") {458 nulls.shouldContainExactly(*nonempty.toList().toTypedArray())459 }460 fail("for same elements but different order") {461 repeating.shouldContainExactly(unique + unique)462 }463 fail("for same elements but different order (variadic)") {464 repeating.shouldContainExactly(1, 1, 2, 2, 3, 3)465 }466 }467 "not contain exactly empty" should {468 fail("for empty") {469 empty.shouldNotContainExactly(sequenceOf<Int>())470 }471 succeed("for single") {472 single.shouldNotContainExactly(empty)473 }474 succeed("for multiple") {475 nulls.shouldNotContainExactly(empty)476 }477 }478 "not contain exactly non-empty" should {479 val nonempty = sparse;480 succeed("for empty") {481 empty.shouldNotContainExactly(nonempty)482 }483 fail("for same") {484 sparse.shouldNotContainExactly(nonempty)485 }486 succeed("for another of different size") {487 countup.shouldNotContainExactly(nonempty)488 }489 succeed("for another of same size") {490 nulls.shouldNotContainExactly(nonempty)491 }492 succeed("for same elements but different order") {493 repeating.shouldNotContainExactly(unique + unique)494 }495 succeed("for same elements but different order (variadic)") {496 repeating.shouldNotContainExactly(1, 1, 2, 2, 3, 3)497 }498 succeed("for single traversable equal sequence") {499 var count1 = 0500 var count2 = 0501 val seq1 = generateSequence { if(count1 < 5) count1++ else null }502 val seq2 = generateSequence { if(count2 < 5) count2++ else null }503 seq1.shouldContainExactly(seq2)504 }505 fail("for single traversable unequal sequence") {506 var count1 = 0507 var count2 = 0508 val seq1 = generateSequence { if(count1 < 5) count1++ else null }509 val seq2 = generateSequence { if(count2 < 6) count2++ else null }510 seq1.shouldContainExactly(seq2)511 }512 }513 "contain in any order" should {514 succeed("for empty with empty") {515 empty.shouldContainAllInAnyOrder(empty)516 }517 fail("for empty with any other") {518 empty.shouldContainAllInAnyOrder(nulls)519 }520 succeed("when elements are same") {521 countdown.shouldContainAllInAnyOrder(countup)522 }523 fail("for overlapping sequence") {524 countup.shouldContainAllInAnyOrder((5..15).asSequence())525 }526 succeed("for subset, same count with nulls") {527 sparse.shouldContainAllInAnyOrder(nulls)528 }529 succeed("for subset, same count") {530 repeating.shouldContainAllInAnyOrder(unique + unique)531 }532 succeed("for subset, same count (variadic)") {533 repeating.shouldContainAllInAnyOrder(1, 1, 2, 2, 3, 3)534 }535 fail("for subset, different count with nulls") {536 sparse.shouldContainAllInAnyOrder(sparse.toSet().asSequence())537 }538 fail("for same, different count") {539 repeating.shouldContainAllInAnyOrder(unique)540 }541 }542 "not contain in any order" should {543 fail("for empty with empty") {544 empty.shouldNotContainAllInAnyOrder(empty)545 }546 succeed("for empty with any other") {547 empty.shouldNotContainAllInAnyOrder(nulls)548 }549 fail("when elements are same") {550 countdown.shouldNotContainAllInAnyOrder(countup)551 }552 succeed("for overlapping sequence") {553 countup.shouldNotContainAllInAnyOrder((5..15).asSequence())554 }555 fail("for subset, same count with nulls") {556 sparse.shouldNotContainAllInAnyOrder(nulls)557 }558 fail("for subset, same count") {559 repeating.shouldNotContainAllInAnyOrder(unique + unique)560 }561 fail("for subset, same count (variadic)") {562 repeating.shouldNotContainAllInAnyOrder(1, 1, 2, 2, 3, 3)563 }564 succeed("for subset, different count with nulls") {565 sparse.shouldNotContainAllInAnyOrder(sparse.toSet().asSequence())566 }567 succeed("for same, different count") {568 repeating.shouldNotContainAllInAnyOrder(unique)569 }570 }571 "contain in order" should {572 "with empty" {573 shouldThrowAny {574 countup.shouldContainInOrder(empty)575 }576 }577 fail("with empty (variadic)") {578 countup.shouldContainInOrder()579 }580 fail("for overlapping sequence") {581 countup.shouldContainInOrder((5..15).asSequence())582 }583 fail("for overlapping sequence (variadic)") {584 countup.shouldContainInOrder(*(5..15).toList().toTypedArray())585 }586 succeed("for subset in order") {587 countup.shouldContainInOrder(sequenceOf(2, 3, 5, 7))588 }589 succeed("for subset in order (variadic)") {590 countup.shouldContainInOrder(2, 3, 5, 7)591 }592 succeed("for subset in order with repeats") {593 repeating.shouldContainInOrder(sequenceOf(1, 3, 1, 2))594 }595 succeed("for subset in order with repeats (variadic)") {596 repeating.shouldContainInOrder(1, 3, 1, 2)597 }598 fail("for subset in order with too many repeats") {599 repeating.shouldContainInOrder(sequenceOf(1, 3, 1, 2, 2))600 }601 fail("for subset in order with too many repeats (variadic)") {602 repeating.shouldContainInOrder(1, 3, 1, 2, 2)603 }604 fail("for subset not in order") {605 countup.shouldContainInOrder(sequenceOf(2, 5, 3, 7))606 }607 fail("for subset not in order (variadic)") {608 countup.shouldContainInOrder(2, 5, 3, 7)609 }610 }611 /​** unique */​612 "unique" should {613 succeed("for empty") {614 empty.shouldBeUnique()615 }616 succeed("for single") {617 single.shouldBeUnique()618 }619 fail("with repeated nulls") {620 sparse.shouldBeUnique()621 }622 fail("with repeats") {623 repeating.shouldBeUnique()624 }625 succeed("for multiple unique") {626 countup.shouldBeUnique()627 }628 }629 "not unique" should {630 fail("for empty") {631 empty.shouldNotBeUnique()632 }633 fail("for single") {634 single.shouldNotBeUnique()635 }636 succeed("with repeated nulls") {637 sparse.shouldNotBeUnique()638 }639 succeed("with repeats") {640 repeating.shouldNotBeUnique()641 }642 fail("for multiple unique") {643 countup.shouldNotBeUnique()644 }645 }646 "duplicates" should {647 fail("for empty") {648 empty.shouldContainDuplicates()649 }650 fail("for single") {651 single.shouldContainDuplicates()652 }653 succeed("with repeated nulls") {654 sparse.shouldContainDuplicates()655 }656 succeed("with repeats") {657 repeating.shouldNotBeUnique()658 }659 fail("for multiple unique") {660 countup.shouldContainDuplicates()661 }662 }663 /​* comparable */​664 /​** bound */​665 "have an upper bound" should {666 succeed("for empty") {667 empty.shouldHaveUpperBound(Int.MIN_VALUE)668 }669 succeed("for single") {670 single.shouldHaveUpperBound(0)671 }672 fail("for single with wrong bound") {673 single.shouldHaveUpperBound(-1)674 }675 succeed("for multiple") {676 countup.shouldHaveUpperBound(countup.maxOrNull() ?: Int.MAX_VALUE)677 }678 fail("for multiple with wrong bound") {679 countup.shouldHaveUpperBound((countup.maxOrNull() ?: Int.MAX_VALUE) - 1)680 }681 }682 "have a lower bound" should {683 succeed("for empty") {684 empty.shouldHaveLowerBound(Int.MAX_VALUE)685 }686 succeed("for single") {687 single.shouldHaveLowerBound(0)688 }689 fail("for single with wrong bound") {690 single.shouldHaveLowerBound(1)691 }692 succeed("for multiple") {693 countup.shouldHaveLowerBound(countup.minOrNull() ?: Int.MIN_VALUE)694 }695 fail("for multiple with wrong bound") {696 countup.shouldHaveLowerBound((countup.minOrNull() ?: Int.MIN_VALUE) + 1)697 }698 }699 /​** sort */​700 "sorted" should {701 succeed("for empty") {702 empty.shouldBeSorted()703 }704 succeed("for single") {705 single.shouldBeSorted()706 }707 fail("for repeating") {708 repeating.shouldBeSorted()709 }710 succeed("for count-up") {711 countup.shouldBeSorted()712 }713 fail("for count-down") {714 countdown.shouldBeSorted()715 }716 }717 "not sorted" should {718 fail("for empty") {719 empty.shouldNotBeSorted()720 }721 fail("for single") {722 single.shouldNotBeSorted()723 }724 succeed("for repeating") {725 repeating.shouldNotBeSorted()726 }727 fail("for count-up") {728 countup.shouldNotBeSorted()729 }730 succeed("for count-down") {731 countdown.shouldNotBeSorted()732 }733 }734 "sorted ascending" should {735 val dir = asc736 succeed("for empty") {737 empty.shouldBeSortedWith(dir)738 }739 succeed("for single") {740 single.shouldBeSortedWith(dir)741 }742 fail("for repeating") {743 repeating.shouldBeSortedWith(dir)744 }745 succeed("for count-up") {746 countup.shouldBeSortedWith(dir)747 }748 fail("for count-down") {749 countdown.shouldBeSortedWith(dir)750 }751 }752 "sorted descending" should {753 val dir = desc754 succeed("for empty") {755 empty.shouldBeSortedWith(dir)756 }757 succeed("for single") {758 single.shouldBeSortedWith(dir)759 }760 fail("for repeating") {761 repeating.shouldBeSortedWith(dir)762 }763 fail("for count-up") {764 countup.shouldBeSortedWith(dir)765 }766 succeed("for count-down") {767 countdown.shouldBeSortedWith(dir)768 }769 }770 "not sorted ascending" should {771 val dir = asc772 fail("for empty") {773 empty.shouldNotBeSortedWith(dir)774 }775 fail("for single") {776 single.shouldNotBeSortedWith(dir)777 }778 succeed("for repeating") {779 repeating.shouldNotBeSortedWith(dir)780 }781 fail("for count-up") {782 countup.shouldNotBeSortedWith(dir)783 }784 succeed("for count-down") {785 countdown.shouldNotBeSortedWith(dir)786 }787 }788 "not sorted descending" should {789 val dir = desc790 fail("for empty") {791 empty.shouldNotBeSortedWith(dir)792 }793 fail("for single") {794 single.shouldNotBeSortedWith(dir)795 }796 succeed("for repeating") {797 repeating.shouldNotBeSortedWith(dir)798 }799 succeed("for count-up") {800 countup.shouldNotBeSortedWith(dir)801 }802 fail("for count-down") {803 countdown.shouldNotBeSortedWith(dir)804 }805 }806 }807}...

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matchers.kt

Source:matchers.kt Github

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1package io.kotest.matchers.sequences2import io.kotest.matchers.Matcher3import io.kotest.matchers.MatcherResult4import io.kotest.matchers.neverNullMatcher5import io.kotest.matchers.should6import io.kotest.matchers.shouldHave7import io.kotest.matchers.shouldNot8private fun <T> Sequence<T>.toString(limit: Int = 10) = this.joinToString(", ", limit = limit)9/​*10How should infinite sequences be detected, and how should they be dealt with?11Sequence<T>.count() may run through the whole sequence (sequences from `generateSequence()` do so), so isn't always a safe way to detect infinite sequences.12For now, the documentation should mention that infinite sequences will cause these matchers never to halt.13*/​14fun <T> Sequence<T>.shouldContainOnlyNulls() = this should containOnlyNulls()15fun <T> Sequence<T>.shouldNotContainOnlyNulls() = this shouldNot containOnlyNulls()16fun <T> containOnlyNulls() = object : Matcher<Sequence<T>> {17 override fun test(value: Sequence<T>) =18 MatcherResult(19 value.all { it == null },20 "Sequence should contain only nulls",21 "Sequence should not contain only nulls"22 )23}24fun <T> Sequence<T>.shouldContainNull() = this should containNull()25fun <T> Sequence<T>.shouldNotContainNull() = this shouldNot containNull()26fun <T> containNull() = object : Matcher<Sequence<T>> {27 override fun test(value: Sequence<T>) =28 MatcherResult(29 value.any { it == null },30 "Sequence should contain at least one null",31 "Sequence should not contain any nulls"32 )33}34fun <T> Sequence<T>.shouldHaveElementAt(index: Int, element: T) = this should haveElementAt(index, element)35fun <T> Sequence<T>.shouldNotHaveElementAt(index: Int, element: T) = this shouldNot haveElementAt(index, element)36fun <T, S : Sequence<T>> haveElementAt(index: Int, element: T) = object : Matcher<S> {37 override fun test(value: S) =38 MatcherResult(39 value.elementAt(index) == element,40 { "Sequence should contain $element at index $index" },41 { "Sequence should not contain $element at index $index" }42 )43}44fun <T> Sequence<T>.shouldContainNoNulls() = this should containNoNulls()45fun <T> Sequence<T>.shouldNotContainNoNulls() = this shouldNot containNoNulls()46fun <T> containNoNulls() = object : Matcher<Sequence<T>> {47 override fun test(value: Sequence<T>) =48 MatcherResult(49 value.all { it != null },50 { "Sequence should not contain nulls" },51 { "Sequence should have at least one null" }52 )53}54infix fun <T, C : Sequence<T>> C.shouldContain(t: T) = this should contain(t)55infix fun <T, C : Sequence<T>> C.shouldNotContain(t: T) = this shouldNot contain(t)56fun <T, C : Sequence<T>> contain(t: T) = object : Matcher<C> {57 override fun test(value: C) = MatcherResult(58 value.contains(t),59 { "Sequence should contain element $t" },60 { "Sequence should not contain element $t" }61 )62}63infix fun <T, C : Sequence<T>> C?.shouldNotContainExactly(expected: C) = this shouldNot containExactly(expected)64fun <T, C : Sequence<T>> C?.shouldNotContainExactly(vararg expected: T) = this shouldNot containExactly(*expected)65infix fun <T, C : Sequence<T>> C?.shouldContainExactly(expected: C) = this should containExactly(expected)66fun <T, C : Sequence<T>> C?.shouldContainExactly(vararg expected: T) = this should containExactly(*expected)67fun <T> containExactly(vararg expected: T): Matcher<Sequence<T>?> = containExactly(expected.asSequence())68/​** Assert that a sequence contains exactly the given values and nothing else, in order. */​69fun <T, C : Sequence<T>> containExactly(expected: C): Matcher<C?> = neverNullMatcher { value ->70 var passed: Boolean = value.count() == expected.count()71 var failMessage = "Sequence should contain exactly $expected but was $value"72 if (passed) {73 val diff = value.zip(expected) { a, b -> Triple(a, b, a == b) }.withIndex().find { !it.value.third }74 if (diff != null) {75 passed = false76 failMessage += " (expected ${diff.value.second} at ${diff.index} but found ${diff.value.first})"77 }78 } else {79 failMessage += " (expected ${expected.count()} elements but found ${value.count()})"80 }81 MatcherResult(82 passed,83 failMessage,84 "Sequence should not be exactly $expected"85 )86}87@Deprecated("use shouldNotContainAllInAnyOrder", ReplaceWith("shouldNotContainAllInAnyOrder"))88infix fun <T, C : Sequence<T>> C?.shouldNotContainExactlyInAnyOrder(expected: C) =89 this shouldNot containAllInAnyOrder(expected)90@Deprecated("use shouldNotContainAllInAnyOrder", ReplaceWith("shouldNotContainAllInAnyOrder"))91fun <T, C : Sequence<T>> C?.shouldNotContainExactlyInAnyOrder(vararg expected: T) =92 this shouldNot containAllInAnyOrder(*expected)93@Deprecated("use shouldContainAllInAnyOrder", ReplaceWith("shouldContainAllInAnyOrder"))94infix fun <T, C : Sequence<T>> C?.shouldContainExactlyInAnyOrder(expected: C) =95 this should containAllInAnyOrder(expected)96@Deprecated("use shouldContainAllInAnyOrder", ReplaceWith("shouldContainAllInAnyOrder"))97fun <T, C : Sequence<T>> C?.shouldContainExactlyInAnyOrder(vararg expected: T) =98 this should containAllInAnyOrder(*expected)99@Deprecated("use containAllInAnyOrder", ReplaceWith("containAllInAnyOrder"))100fun <T> containExactlyInAnyOrder(vararg expected: T): Matcher<Sequence<T>?> =101 containAllInAnyOrder(expected.asSequence())102@Deprecated("use containAllInAnyOrder", ReplaceWith("containAllInAnyOrder"))103/​** Assert that a sequence contains the given values and nothing else, in any order. */​104fun <T, C : Sequence<T>> containExactlyInAnyOrder(expected: C): Matcher<C?> = containAllInAnyOrder(expected)105infix fun <T, C : Sequence<T>> C?.shouldNotContainAllInAnyOrder(expected: C) =106 this shouldNot containAllInAnyOrder(expected)107fun <T, C : Sequence<T>> C?.shouldNotContainAllInAnyOrder(vararg expected: T) =108 this shouldNot containAllInAnyOrder(*expected)109infix fun <T, C : Sequence<T>> C?.shouldContainAllInAnyOrder(expected: C) =110 this should containAllInAnyOrder(expected)111fun <T, C : Sequence<T>> C?.shouldContainAllInAnyOrder(vararg expected: T) =112 this should containAllInAnyOrder(*expected)113fun <T> containAllInAnyOrder(vararg expected: T): Matcher<Sequence<T>?> =114 containAllInAnyOrder(expected.asSequence())115/​** Assert that a sequence contains all the given values and nothing else, in any order. */​116fun <T, C : Sequence<T>> containAllInAnyOrder(expected: C): Matcher<C?> = neverNullMatcher { value ->117 val passed = value.count() == expected.count() && expected.all { value.contains(it) }118 MatcherResult(119 passed,120 { "Sequence should contain the values of $expected in any order, but was $value" },121 { "Sequence should not contain the values of $expected in any order" }122 )123}124infix fun <T : Comparable<T>, C : Sequence<T>> C.shouldHaveUpperBound(t: T) = this should haveUpperBound(t)125fun <T : Comparable<T>, C : Sequence<T>> haveUpperBound(t: T) = object : Matcher<C> {126 override fun test(value: C) = MatcherResult(127 (value.maxOrNull() ?: t) <= t,128 { "Sequence should have upper bound $t" },129 { "Sequence should not have upper bound $t" }130 )131}132infix fun <T : Comparable<T>, C : Sequence<T>> C.shouldHaveLowerBound(t: T) = this should haveLowerBound(t)133fun <T : Comparable<T>, C : Sequence<T>> haveLowerBound(t: T) = object : Matcher<C> {134 override fun test(value: C) = MatcherResult(135 (value.minOrNull() ?: t) >= t,136 { "Sequence should have lower bound $t" },137 { "Sequence should not have lower bound $t" }138 )139}140fun <T> Sequence<T>.shouldBeUnique() = this should beUnique()141fun <T> Sequence<T>.shouldNotBeUnique() = this shouldNot beUnique()142fun <T> beUnique() = object : Matcher<Sequence<T>> {143 override fun test(value: Sequence<T>) = MatcherResult(144 value.toSet().size == value.count(),145 { "Sequence should be Unique" },146 { "Sequence should contain at least one duplicate element" }147 )148}149fun <T> Sequence<T>.shouldContainDuplicates() = this should containDuplicates()150fun <T> Sequence<T>.shouldNotContainDuplicates() = this shouldNot containDuplicates()151fun <T> containDuplicates() = object : Matcher<Sequence<T>> {152 override fun test(value: Sequence<T>) = MatcherResult(153 value.toSet().size < value.count(),154 { "Sequence should contain duplicates" },155 { "Sequence should not contain duplicates" }156 )157}158fun <T : Comparable<T>> Sequence<T>.shouldBeSorted() = this should beSorted()159fun <T : Comparable<T>> Sequence<T>.shouldNotBeSorted() = this shouldNot beSorted()160fun <T : Comparable<T>> beSorted(): Matcher<Sequence<T>> = sorted()161fun <T : Comparable<T>> sorted(): Matcher<Sequence<T>> = object : Matcher<Sequence<T>> {162 override fun test(value: Sequence<T>): MatcherResult {163 @Suppress("UNUSED_DESTRUCTURED_PARAMETER_ENTRY")164 val failure = value.zipWithNext().withIndex().firstOrNull { (i, it) -> it.first > it.second }165 val snippet = value.joinToString(",", limit = 10)166 val elementMessage = when (failure) {167 null -> ""168 else -> ". Element ${failure.value.first} at index ${failure.index} was greater than element ${failure.value.second}"169 }170 return MatcherResult(171 failure == null,172 { "Sequence $snippet should be sorted$elementMessage" },173 { "Sequence $snippet should not be sorted" }174 )175 }176}177infix fun <T> Sequence<T>.shouldBeSortedWith(comparator: Comparator<in T>) = this should beSortedWith(comparator)178infix fun <T> Sequence<T>.shouldBeSortedWith(cmp: (T, T) -> Int) = this should beSortedWith(cmp)179fun <T> beSortedWith(comparator: Comparator<in T>): Matcher<Sequence<T>> = sortedWith(comparator)180fun <T> beSortedWith(cmp: (T, T) -> Int): Matcher<Sequence<T>> = sortedWith(cmp)181fun <T> sortedWith(comparator: Comparator<in T>): Matcher<Sequence<T>> = sortedWith { a, b ->182 comparator.compare(a, b)183}184fun <T> sortedWith(cmp: (T, T) -> Int): Matcher<Sequence<T>> = object : Matcher<Sequence<T>> {185 override fun test(value: Sequence<T>): MatcherResult {186 @Suppress("UNUSED_DESTRUCTURED_PARAMETER_ENTRY")187 val failure = value.zipWithNext().withIndex().firstOrNull { (i, it) -> cmp(it.first, it.second) > 0 }188 val snippet = value.joinToString(",", limit = 10)189 val elementMessage = when (failure) {190 null -> ""191 else -> ". Element ${failure.value.first} at index ${failure.index} shouldn't precede element ${failure.value.second}"192 }193 return MatcherResult(194 failure == null,195 { "Sequence $snippet should be sorted$elementMessage" },196 { "Sequence $snippet should not be sorted" }197 )198 }199}200infix fun <T> Sequence<T>.shouldNotBeSortedWith(comparator: Comparator<in T>) = this shouldNot beSortedWith(comparator)201infix fun <T> Sequence<T>.shouldNotBeSortedWith(cmp: (T, T) -> Int) = this shouldNot beSortedWith(cmp)202infix fun <T> Sequence<T>.shouldHaveSingleElement(t: T) = this should singleElement(t)203infix fun <T> Sequence<T>.shouldNotHaveSingleElement(t: T) = this shouldNot singleElement(t)204fun <T> singleElement(t: T) = object : Matcher<Sequence<T>> {205 override fun test(value: Sequence<T>) = MatcherResult(206 value.count() == 1 && value.first() == t,207 { "Sequence should be a single element of $t but has ${value.count()} elements" },208 { "Sequence should not be a single element of $t" }209 )210}211infix fun <T> Sequence<T>.shouldHaveCount(count: Int) = this should haveCount(count)212infix fun <T> Sequence<T>.shouldNotHaveCount(count: Int) = this shouldNot haveCount(213 count)214infix fun <T> Sequence<T>.shouldHaveSize(size: Int) = this should haveCount(size)215infix fun <T> Sequence<T>.shouldNotHaveSize(size: Int) = this shouldNot haveCount(size)216/​/​fun <T> haveSize(size: Int) = haveCount(size)217fun <T> haveSize(size: Int): Matcher<Sequence<T>> = haveCount(size)218fun <T> haveCount(count: Int): Matcher<Sequence<T>> = object : Matcher<Sequence<T>> {219 override fun test(value: Sequence<T>) =220 MatcherResult(221 value.count() == count,222 { "Sequence should have count $count but has count ${value.count()}" },223 { "Sequence should not have count $count" }224 )225}226infix fun <T, U> Sequence<T>.shouldBeLargerThan(other: Sequence<U>) = this should beLargerThan(other)227fun <T, U> beLargerThan(other: Sequence<U>) = object : Matcher<Sequence<T>> {228 override fun test(value: Sequence<T>) = MatcherResult(229 value.count() > other.count(),230 { "Sequence of count ${value.count()} should be larger than sequence of count ${other.count()}" },231 { "Sequence of count ${value.count()} should not be larger than sequence of count ${other.count()}" }232 )233}234infix fun <T, U> Sequence<T>.shouldBeSmallerThan(other: Sequence<U>) = this should beSmallerThan(other)235fun <T, U> beSmallerThan(other: Sequence<U>) = object : Matcher<Sequence<T>> {236 override fun test(value: Sequence<T>) = MatcherResult(237 value.count() < other.count(),238 { "Sequence of count ${value.count()} should be smaller than sequence of count ${other.count()}" },239 { "Sequence of count ${value.count()} should not be smaller than sequence of count ${other.count()}" }240 )241}242infix fun <T, U> Sequence<T>.shouldBeSameCountAs(other: Sequence<U>) = this should beSameCountAs(243 other)244fun <T, U> beSameCountAs(other: Sequence<U>) = object : Matcher<Sequence<T>> {245 override fun test(value: Sequence<T>) = MatcherResult(246 value.count() == other.count(),247 { "Sequence of count ${value.count()} should be the same count as sequence of count ${other.count()}" },248 { "Sequence of count ${value.count()} should not be the same count as sequence of count ${other.count()}" }249 )250}251infix fun <T, U> Sequence<T>.shouldBeSameSizeAs(other: Sequence<U>) = this.shouldBeSameCountAs(other)252infix fun <T> Sequence<T>.shouldHaveAtLeastCount(n: Int) = this shouldHave atLeastCount(n)253fun <T> atLeastCount(n: Int) = object : Matcher<Sequence<T>> {254 override fun test(value: Sequence<T>) = MatcherResult(255 value.count() >= n,256 { "Sequence should contain at least $n elements" },257 { "Sequence should contain less than $n elements" }258 )259}260infix fun <T> Sequence<T>.shouldHaveAtLeastSize(n: Int) = this.shouldHaveAtLeastCount(n)261infix fun <T> Sequence<T>.shouldHaveAtMostCount(n: Int) = this shouldHave atMostCount(n)262fun <T> atMostCount(n: Int) = object : Matcher<Sequence<T>> {263 override fun test(value: Sequence<T>) = MatcherResult(264 value.count() <= n,265 { "Sequence should contain at most $n elements" },266 { "Sequence should contain more than $n elements" }267 )268}269infix fun <T> Sequence<T>.shouldHaveAtMostSize(n: Int) = this shouldHave atMostCount(n)270infix fun <T> Sequence<T>.shouldExist(p: (T) -> Boolean) = this should exist(p)271fun <T> exist(p: (T) -> Boolean) = object : Matcher<Sequence<T>> {272 override fun test(value: Sequence<T>) = MatcherResult(273 value.any { p(it) },274 { "Sequence should contain an element that matches the predicate $p" },275 { "Sequence should not contain an element that matches the predicate $p" }276 )277}278fun <T : Comparable<T>> Sequence<T>.shouldContainInOrder(vararg ts: T) =279 this should containsInOrder(ts.asSequence())280infix fun <T : Comparable<T>> Sequence<T>.shouldContainInOrder(expected: Sequence<T>) =281 this should containsInOrder(expected)282fun <T : Comparable<T>> Sequence<T>.shouldNotContainInOrder(expected: Sequence<T>) =283 this shouldNot containsInOrder(expected)284/​** Assert that a sequence contains a given subsequence, possibly with values in between. */​285fun <T> containsInOrder(subsequence: Sequence<T>): Matcher<Sequence<T>?> = neverNullMatcher { actual ->286 val subsequenceCount = subsequence.count()287 require(subsequenceCount > 0) { "expected values must not be empty" }288 var subsequenceIndex = 0289 val actualIterator = actual.iterator()290 while (actualIterator.hasNext() && subsequenceIndex < subsequenceCount) {291 if (actualIterator.next() == subsequence.elementAt(subsequenceIndex)) subsequenceIndex += 1292 }293 MatcherResult(294 subsequenceIndex == subsequence.count(),295 { "[$actual] did not contain the elements [$subsequence] in order" },296 { "[$actual] should not contain the elements [$subsequence] in order" }297 )298}299fun <T> Sequence<T>.shouldBeEmpty() = this should beEmpty()300fun <T> Sequence<T>.shouldNotBeEmpty() = this shouldNot beEmpty()301fun <T> beEmpty(): Matcher<Sequence<T>> = object : Matcher<Sequence<T>> {302 override fun test(value: Sequence<T>): MatcherResult = MatcherResult(303 value.count() == 0,304 { "Sequence should be empty" },305 { "Sequence should not be empty" }306 )307}308fun <T> Sequence<T>.shouldContainAll(vararg ts: T) = this should containAll(ts.asSequence())309infix fun <T> Sequence<T>.shouldContainAll(ts: Collection<T>) = this should containAll(ts.asSequence())310infix fun <T> Sequence<T>.shouldContainAll(ts: Sequence<T>) = this should containAll(ts)311fun <T> Sequence<T>.shouldNotContainAll(vararg ts: T) = this shouldNot containAll(ts.asSequence())312infix fun <T> Sequence<T>.shouldNotContainAll(ts: Collection<T>) = this shouldNot containAll(ts.asSequence())313infix fun <T> Sequence<T>.shouldNotContainAll(ts: Sequence<T>) = this shouldNot containAll(ts)314fun <T, C : Sequence<T>> containAll(ts: C): Matcher<Sequence<T>> = object : Matcher<Sequence<T>> {315 override fun test(value: Sequence<T>): MatcherResult = MatcherResult(316 ts.all { value.contains(it) },317 { "Sequence should contain all of ${value.joinToString(",", limit = 10)}" },318 { "Sequence should not contain all of ${value.joinToString(",", limit = 10)}" }319 )320}...

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Sequence.shouldBeUnique

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1val list = listOf(1, 2, 3, 4, 5)2list.shouldBeUnique { it % 2 == 0 }3val list = listOf(1, 2, 3, 4, 5)4list.shouldBeUnique()5val list = listOf(1, 2, 3, 4, 5)6list.shouldBeUnique()7val list = listOf(1, 2, 3, 4, 5)8list.shouldBeUnique()9val list = listOf(1, 2, 3, 4, 5)10list.shouldBeUnique()11val list = listOf(1, 2, 3, 4, 5)12list.shouldBeUnique()13val list = listOf(1, 2, 3, 4, 5)14list.shouldBeUnique()15val list = listOf(1, 2, 3, 4, 5)16list.shouldBeUnique()17val list = listOf(1, 2, 3, 4, 5)18list.shouldBeUnique()19val list = listOf(1, 2, 3, 4, 5)20list.shouldBeUnique()21val list = listOf(1, 2, 3, 4, 5)22list.shouldBeUnique()

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Sequence.shouldBeUnique

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1@DisplayName ( "Sequence should be unique" ) @Test fun test () { val sequence = sequenceOf ( 1 , 2 , 3 , 4 , 5 ) sequence . shouldBeUnique } }2@DisplayName ( "Sequence should be unique" ) @Test fun test () { val sequence = sequenceOf ( 1 , 2 , 3 , 4 , 5 ) sequence . shouldNotBeUnique }3@DisplayName ( "Sequence should contain" ) @Test fun test () { val sequence = sequenceOf ( 1 , 2 , 3 , 4 , 5 ) sequence . shouldContain ( 1 ) }4@DisplayName ( "Sequence should contain all" ) @Test fun test () { val sequence = sequenceOf ( 1 , 2 , 3 , 4 , 5 ) sequence . shouldContainAll ( 1 , 2 , 3 ) }5@DisplayName ( "Sequence should contain any" ) @Test fun test () { val sequence = sequenceOf ( 1 , 2 , 3 , 4 , 5 ) sequence . shouldContainAny ( 1 , 2 , 3 ) }6@DisplayName ( "Sequence should contain none" ) @Test fun test () { val sequence = sequenceOf ( 1 , 2 , 3 , 4 , 5 ) sequence . shouldContainNone ( 6 , 7 , 8 ) }7@DisplayName ( "Sequence should contain in order" ) @Test fun test () { val sequence = sequenceOf ( 1 , 2 , 3 , 4 , 5 ) sequence . shouldContainInOrder ( 1 , 2 , 3 ) }

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Sequence.shouldBeUnique

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1@DisplayName("Test for unique sequence elements")2fun shouldBeUniqueTest() {3val sequence = sequenceOf(1, 2, 3, 4, 5)4sequence.shouldBeUnique()5}6@DisplayName("Test for sequence contains all elements")7fun shouldContainAllTest() {8val sequence = sequenceOf(1, 2, 3, 4, 5)9sequence.shouldContainAll(1, 2, 3, 4, 5)10}11@DisplayName("Test for sequence contains none of the elements")12fun shouldContainNoneTest() {13val sequence = sequenceOf(1, 2, 3, 4, 5)14sequence.shouldContainNone(6, 7, 8, 9, 10)15}16@DisplayName("Test for sequence contains exactly the elements")17fun shouldContainExactlyTest() {18val sequence = sequenceOf(1, 2, 3, 4, 5)19sequence.shouldContainExactly(1, 2, 3, 4, 5)20}21@DisplayName("Test for sequence is empty")22fun shouldBeEmptyTest() {23val sequence = sequenceOf<Int>()24sequence.shouldBeEmpty()25}26@DisplayName("Test for sequence is sorted")27fun shouldBeSortedTest() {28val sequence = sequenceOf(1, 2, 3, 4, 5)29sequence.shouldBeSorted()30}31@DisplayName("Test for sequence is sorted by given function")32fun shouldBeSortedByTest() {33val sequence = sequenceOf(5, 4, 3, 2, 1)34sequence.shouldBeSortedBy { it }35}

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Sequence.shouldBeUnique

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1import io.kotest.matchers.sequences.shouldBeUnique2@DisplayName( "Should Be Unique" )3class SequenceShouldBeUniqueTest {4@DisplayName( "Should throw AssertionError when sequence is not unique" )5fun test1() {6val sequence = sequenceOf( 1 , 2 , 3 , 4 , 5 , 6 , 7 )7assertThrows<AssertionError> {8sequence.shouldBeUnique()9}10}11@DisplayName( "Should not throw AssertionError when sequence is unique" )12fun test2() {13val sequence = sequenceOf( 1 , 2 , 3 , 4 , 5 , 6 , 7 , 8 )14sequence.shouldBeUnique()15}16}17import io.kotest.matchers.sequences.shouldBeEmpty18@DisplayName( "Should Be Empty" )19class SequenceShouldBeEmptyTest {20@DisplayName( "Should throw AssertionError when sequence is not empty" )21fun test1() {22val sequence = sequenceOf( 1 , 2 , 3 , 4 , 5 , 6 , 7 )23assertThrows<AssertionError> {24sequence.shouldBeEmpty()25}26}27@DisplayName( "Should not throw AssertionError when sequence is empty" )28fun test2() {29val sequence = emptySequence()30sequence.shouldBeEmpty()31}32}33import io.kotest.matchers.sequences.shouldBeEmpty34@DisplayName( "Should Be Empty" )35class SequenceShouldBeEmptyTest {36@DisplayName( "Should throw AssertionError when sequence is not empty" )37fun test1() {38val sequence = sequenceOf( 1 , 2 , 3 , 4 , 5 , 6 , 7 )39assertThrows<AssertionError> {40sequence.shouldBeEmpty()41}42}43@DisplayName( "Should not throw AssertionError when sequence is empty" )44fun test2() {45val sequence = emptySequence()46sequence.shouldBeEmpty()47}48}49import io.kotest.matchers.sequences.shouldBeEmpty50@DisplayName( "Should Be Empty" )51class SequenceShouldBeEmptyTest {52@DisplayName( "

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