How to use fail class of io.kotest.assertions package

Best Kotest code snippet using io.kotest.assertions.fail

KotestStringSpecTest.kt

Source:KotestStringSpecTest.kt

1package com.example.kotest2import com.example.logger3import io.kotest.assertions.fail4import io.kotest.core.extensions.Extension5import io.kotest.core.listeners.TestListener6import io.kotest.core.spec.Spec7import io.kotest.core.spec.style.StringSpec8import io.kotest.core.test.TestCase9import io.kotest.core.test.TestResult10import kotlin.reflect.KClass11class KotestStringSpecTest : StringSpec({12    val logger = logger<KotestStringSpecTest>()13    val list = mutableListOf<String>()14    fun add(item: String) {15        list.add(item)16    }17    add("init-1")18    logger.info("init 1, list: {}", list)19    "foo" {20        add("foo")21        logger.info("foo, list: {}", list)22    }23    add("init-2")24    logger.info("init 2, list: {}", list)25    "fail" {26        add("fail")27        logger.info("fail, list: {}", list)28        fail("fail, list: $list")29    }30    "bar" {31        add("bar")32        logger.info("bar, list: {}", list)33    }34})35class KotestStringSpecTest2: StringSpec() {36    private val logger = logger<KotestStringSpecTest2>()37    init {38        val list = mutableListOf<String>()39        fun add(item: String) {40            list.add(item)41        }42        add("init-1")43        logger.info("init 1, list: {}", list)44        "foo" {45            add("foo")46            logger.info("foo, list: {}", list)47        }48        add("init-2")49        logger.info("init 2, list: {}", list)50        "fail" {51            add("fail")52            logger.info("fail, list: {}", list)53            fail("fail, list: $list")54        }55        "bar" {56            add("bar")57            logger.info("bar, list: {}", list)58        }59    }60    override fun afterSpec(spec: Spec) {61        logger.info("afterSpec")62    }63    override fun afterTest(testCase: TestCase, result: TestResult) {64        logger.info("afterTest")65    }66    override fun beforeSpec(spec: Spec) {67        logger.info("beforeSpec")...

InMemoryHopRepositoryTest.kt

Source:InMemoryHopRepositoryTest.kt

...5import domain.quantities.PercentRange6import domain.quantities.QuantityRange7import fixtures.sampleHop8import io.kotest.assertions.assertSoftly9import io.kotest.assertions.fail10import io.kotest.core.spec.style.ShouldSpec11import io.kotest.matchers.collections.shouldContainExactlyInAnyOrder12import io.kotest.matchers.maps.shouldHaveSize13import io.kotest.matchers.nulls.shouldNotBeNull14import io.kotest.matchers.shouldBe15import io.kotest.matchers.string.shouldNotBeBlank16class InMemoryHopRepositoryTest : ShouldSpec({17    val repoUnderTest = InMemoryHopRepository()18    beforeEach {19        repoUnderTest.clear()20    }21    should("find hop by name") {22        // Givent23        repoUnderTest.save(sampleHop)24        repoUnderTest.save(sampleHop.copy(name = "Cascade", similarTo = listOf("Citra")))25        repoUnderTest.save(sampleHop.copy(name = "Chinook", similarTo = listOf("Cascade", "Citra", "Chinook")))26        // When & Then27        repoUnderTest.findByName("Citra").shouldNotBeNull().apply {28            assertSoftly {29                name shouldBe "Citra"30                country.shouldContainExactlyInAnyOrder(Country.USA)31                alpha shouldBe PercentRange(10.0, 12.0)32                beta shouldBe PercentRange(3.5, 4.5)33                coH shouldBe PercentRange(22.0, 24.0)34                type.shouldContainExactlyInAnyOrder(HopType.AROMATIC, HopType.BITTERING)35                profile.shouldNotBeBlank()36                similarTo.shouldContainExactlyInAnyOrder("Cascade", "Centennial", "Chinook")37            }38        }39    }40    should("get all") {41        // Given42        repoUnderTest.save(sampleHop)43        repoUnderTest.save(sampleHop.copy(name = "Cascade", similarTo = listOf("Citra")))44        repoUnderTest.save(sampleHop.copy(name = "Chinook", similarTo = listOf("Cascade", "Citra", "Chinook")))45        // When46        val res = repoUnderTest.getAll()47        // Then48        res shouldHaveSize 349        res["CASCADE"] shouldBe Hop(50            name = "Cascade",51            country = listOf(Country.USA),52            alpha = PercentRange(from = 10.0, to = 12.0),53            beta = PercentRange(from = 3.5, to = 4.5),54            coH = PercentRange(from = 22.0, to = 24.0),55            oil = QuantityRange(from = 1.5, to = 3.0),56            type = listOf(HopType.BITTERING, HopType.AROMATIC),57            profile = "Agrumes, pamplemousse, fruit de la passion",58            similarTo = listOf("Citra"),59        )60    }61    should("find all similar hops") {62        // Given63        repoUnderTest.save(sampleHop)64        repoUnderTest.save(sampleHop.copy(name = "Cascade", similarTo = listOf("Citra")))65        repoUnderTest.save(sampleHop.copy(name = "Centennial", similarTo = emptyList()))66        repoUnderTest.save(sampleHop.copy(name = "Chinook", similarTo = listOf("Cascade", "Citra", "Centennial")))67        val rootHop = repoUnderTest.findByName("Chinook") ?: fail("initialization error")68        // When & Then69        repoUnderTest.findSimilar(rootHop).shouldContainExactlyInAnyOrder(70            repoUnderTest.findByName("Cascade"),71            repoUnderTest.findByName("Centennial"),72            repoUnderTest.findByName("Citra"),73        )74    }75})...

build.gradle.kts

Source:build.gradle.kts

...76        allWarningsAsErrors = true77    }78}79detekt {80    failFast = true // fail build on any finding81    buildUponDefaultConfig = true // preconfigure defaults82    config = files("$projectDir/config/detekt.yml")83}...

BeforeProcessLabelValidatorTest.kt

Source:BeforeProcessLabelValidatorTest.kt

1package mikufan.cx.vvd.downloader.component2import io.kotest.assertions.fail3import io.kotest.assertions.throwables.shouldNotThrowAnyUnit4import io.kotest.matchers.shouldBe5import io.kotest.matchers.string.shouldContainIgnoringCase6import mikufan.cx.vvd.common.exception.RuntimeVocaloidException7import mikufan.cx.vvd.downloader.model.VSongTask8import mikufan.cx.vvd.downloader.util.SpringBootDirtyTestWithTestProfile9import mikufan.cx.vvd.downloader.util.SpringShouldSpec10import org.jeasy.batch.core.record.Record11@SpringBootDirtyTestWithTestProfile(12  customProperties = [13    "io.input-directory=src/test/resources/2020å¹´Vå®¶æ°æ² with failing labels"14  ]15)16class BeforeProcessLabelValidatorFailureTest(17  val labelsReader: LabelsReader,18  val beforeProcessLabelValidator: BeforeProcessLabelValidator19) : SpringShouldSpec({20  val shouldFailValidationWith: Record<VSongTask>.(String) -> Unit = { containedString ->21    try {22      beforeProcessLabelValidator.processRecord(this)23      fail("fail to catch the no order validation error")24    } catch (e: RuntimeVocaloidException) {25      e.message shouldContainIgnoringCase containedString26    }27  }28  context("validating the read label") {29    should("not pass if missing an order") {30      val record1 = labelsReader.readRecord()!!31      record1.payload.label.order shouldBe 032      record1.shouldFailValidationWith("must be greater than or equal to 1")33    }34    should("not pass if has blank info file name") {35      val record2 = labelsReader.readRecord()!!36      record2.payload.label.order shouldBe 3737      record2.payload.label.infoFileName shouldBe " "...

LinearCodeTest.kt

Source:LinearCodeTest.kt

1import calculations.Matrix2import calculations.numMod3import codes.LinearCode4import io.kotest.assertions.fail5import io.kotest.assertions.withClue6import io.kotest.core.spec.style.StringSpec7import io.kotest.core.test.createTestName8import io.kotest.matchers.shouldBe9import java.util.*10class LinearCodeTest : StringSpec({11    val hamming74 = LinearCode(7, 4, Matrix(arrayOf(arrayOf(0, 1, 1, 1), arrayOf(1, 0, 1, 1), arrayOf(1, 1, 0, 1))))12    (0..5000).asSequence().forEach { index ->13        val infoWord = arrayOf(14            (index numMod 11) numMod 2,15            (index numMod 13) numMod 2,16            (index numMod 17) numMod 2,17            (index numMod 19) numMod 218        )19        "${infoWord.contentToString()} encoding decoding test" {20            val codeWord = hamming74.encode(infoWord)21            val noisyCodeWord =22                LinearCode.noisyChannelSimulation(23                    codeWord ?: fail("Encoding failed"),24                    probabilityOfFlipPerBit = 0.3,25                    maxFlippedBits = 126                )27            val decodedNoisyCodeWord = hamming74.decode(noisyCodeWord)28            createTestName(29                "${infoWord.contentToString()} encoding (encoded to: ${codeWord.contentToString()}) " +30                        "noising (noised to: ${noisyCodeWord.contentToString()}) decoding (decoded to: ${decodedNoisyCodeWord.contentToString()})test"31            )32            infoWord shouldBe decodedNoisyCodeWord33        }34    }35    "encoding" {36        withClue("(1,0,1,1) should be encoded to (1,0,1,1,0,1,0)") {37            hamming74.encode(...

ExampleSpec.kt

Source:ExampleSpec.kt

...21class ExampleSpec : StringSpec({22  "true shouldBe true" {23    true shouldBe true24  }25  "exception should fail" {26    // throw RuntimeException("Boom2!")27  }28  "kotest arrow extension use-cases" {29    // smart-cast abilities for arrow types30    Either.Right("HI").shouldBeRight().shouldBeTypeOf<String>()31  }32  // utilise builtin or costume Laws with Generators to verify behavior33  testLaws(34    MonoidLaws.laws(Monoid.list(), Arb.list(Arb.string())),35    MonoidLaws.laws(Monoid.numbers(), Arb.numbers())36  )37  // optics Laws from arrow38  testLaws(39    TraversalLaws.laws(...

error.kt

Source:error.kt

1package com.github.shwaka.kotest.inspectors2import io.kotest.assertions.AssertionsConfig3import io.kotest.assertions.exceptionToMessage4import io.kotest.assertions.failure5import io.kotest.assertions.show.show6import io.kotest.inspectors.ElementFail7import io.kotest.inspectors.ElementPass8import io.kotest.inspectors.ElementResult9/**10 * Build assertion error message.11 *12 * Show 10 passed and failed results by default. You can change the number of output results by setting the13 * system property `kotest.assertions.output.max=20`.14 *15 * E.g.:16 *17 * ```18 *     -Dkotest.assertions.output.max=2019 * ```20 */21fun <T> buildAssertionError(msg: String, results: List<ElementResult<T>>): Nothing {22    val maxResults = AssertionsConfig.maxErrorsOutput23    val passed = results.filterIsInstance<ElementPass<T>>()24    val failed = results.filterIsInstance<ElementFail<T>>()25    val builder = StringBuilder(msg)26    builder.append("\n\nThe following elements passed:\n")27    if (passed.isEmpty()) {28        builder.append("--none--")29    } else {30        builder.append(passed.take(maxResults).map { it.t }.joinToString("\n"))31        if (passed.size > maxResults) {32            builder.append("\n... and ${passed.size - maxResults} more passed elements")33        }34    }35    builder.append("\n\nThe following elements failed:\n")36    if (failed.isEmpty()) {37        builder.append("--none--")38    } else {39        builder.append(40            failed.take(maxResults).joinToString("\n") {41                val message = exceptionToMessage(it.throwable).lines().joinToString("\n  ")42                it.t.show().value + " => " + message43            }44        )45        if (failed.size > maxResults) {46            builder.append("\n... and ${failed.size - maxResults} more failed elements")47        }48    }49    throw failure(builder.toString())50}...

NewPetsTest.kt

Source:NewPetsTest.kt

...29      newPet.name shouldBe petToCreate.name30    }31  }32  test("NewPets should not created is there is some errors in adapter") {33    val failNewPets = NewPets(PetEnvironment(object : PetRepository {34      override fun create(pet: Pet): Either<PetErrors, Pet> = Either.Left(CannotSavePetInDB)35    }, petProducer))36    val created = failNewPets.create(petToCreate)37    created.shouldBeLeft(CannotSavePetInDB)38  }39})...

fail

Using AI Code Generation

1    val result = Result.of { 1 / 0 }2    result shouldBe Fail(throwable)3    result shouldBe Fail<Throwable>()4    result shouldBe Fail<ArithmeticException>()5    result shouldBe Fail<ArithmeticException>("/ by zero")6    result shouldBe Fail<ArithmeticException>("/ by zero", throwable)7    result shouldBe Fail<ArithmeticException>(throwable)8    val result = Result.of { 1 / 0 }9    val result = Result.of { 1 / 0 }10    val result = Result.of { 1 / 0 }11    val result = Result.of { 1 / 0 }12    val result = Result.of { 1 / 0 }

fail

Using AI Code Generation

1import io.kotest.assertions.fail2class ExampleTest : ShouldSpec({3    should("fail") {4        fail("This test should fail")5    }6})7import io.kotest.assertions.shouldFail8class ExampleTest : ShouldSpec({9    should("fail") {10        shouldFail {11        }12    }13})14import io.kotest.assertions.shouldThrowAny15class ExampleTest : ShouldSpec({16    should("fail") {17        shouldThrowAny {18        }19    }20})21import io.kotest.assertions.shouldThrowExactly22class ExampleTest : ShouldSpec({23    should("fail") {24        shouldThrowExactly<Exception> {25        }26    }27})28import io.kotest.assertions.shouldThrowInstanceOf29class ExampleTest : ShouldSpec({30    should("fail") {31        shouldThrowInstanceOf<Exception> {32        }33    }34})35import io.kotest.assertions.shouldThrowNone36class ExampleTest : ShouldSpec({37    should("fail") {38        shouldThrowNone {39        }40    }41})

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