How to use failWrongExceptionThrown method of io.kotest.core.spec.style.AnnotationSpec class

Best Kotest code snippet using io.kotest.core.spec.style.AnnotationSpec.failWrongExceptionThrown

AnnotationSpec.kt

Source: AnnotationSpec.kt Github

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...106 null107 } catch (t: Throwable) {108 t.unwrapIfReflectionCall()109 } ?: failNoExceptionThrown(expected)110 if (thrown::class != expected) failWrongExceptionThrown(expected, thrown)111 }112 }113 private fun KFunction<*>.callNotExpectingException(): suspend TestScope.() -> Unit {114 return {115 try {116 callSuspend(this@AnnotationSpec)117 } catch (t: Throwable) {118 throw t.unwrapIfReflectionCall()119 }120 }121 }122 private fun failNoExceptionThrown(expected: KClass<out Throwable>): Nothing {123 throw AssertionError("Expected exception of class ${expected.simpleName}, but no exception was thrown.")124 }125 private fun failWrongExceptionThrown(expected: KClass<out Throwable>, thrown: Throwable): Nothing {126 throw AssertionError("Expected exception of class ${expected.simpleName}, but ${thrown::class.simpleName} was thrown instead.")127 }128 /​/​ All annotations should be kept inside this class, to avoid any usage outside of AnnotationSpec.129 /​/​ One can only use annotations to execute code inside AnnotationSpec.130 /​**131 * Marks a function to be executed before each test132 *133 * This can be used in AnnotationSpec to mark a function to be executed before every test by Kotest Engine134 * @see BeforeAll135 * @see AfterEach136 */​137 annotation class BeforeEach138 /​**139 * Marks a function to be executed before each test...

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failWrongExceptionThrown

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1import io.kotest.assertions.throwables.shouldThrow2import io.kotest.core.spec.style.AnnotationSpec3import io.kotest.matchers.shouldBe4import io.kotest.matchers.shouldNotBe5class CalculatorSpec : AnnotationSpec() {6fun `test add method`() {7Calculator().add(2, 3) shouldBe 58}9fun `test subtract method`() {10Calculator().subtract(2, 3) shouldBe -111}12fun `test multiply method`() {13Calculator().multiply(2, 3) shouldBe 614}15fun `test divide method`() {16Calculator().divide(6, 3) shouldBe 217}18fun `test divide method by zero`() {19shouldThrow<ArithmeticException> {20Calculator().divide(6, 0)21}22}23}24import io.kotest.assertions.throwables.shouldThrow25import io.kotest.core.spec.style.StringSpec26import io.kotest.matchers.shouldBe27import io.kotest.matchers.shouldNotBe28class CalculatorSpec : StringSpec({29"test add method" {30Calculator().add(2, 3) shouldBe 531}32"test subtract method" {33Calculator().subtract(2, 3) shouldBe -134}35"test multiply method" {36Calculator().multiply(2, 3) shouldBe 637}38"test divide method" {39Calculator().divide(6, 3) shouldBe 240}41"test divide method by zero" {42shouldThrow<ArithmeticException> {43Calculator().divide(6, 0)44}45}46})47import io.kotest.assertions.throwables.shouldThrow48import io.kotest.core.spec.style.WordSpec49import io.kotest.matchers.shouldBe50import io.kotest.matchers.shouldNotBe51class CalculatorSpec : WordSpec({52"test add method" should {53"return sum of two numbers" {54Calculator().add(2, 3) shouldBe 555}56}57"test subtract method" should {58"return difference of two numbers" {59Calculator().subtract(2, 3) shouldBe -160}61}62"test multiply method" should {

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failWrongExceptionThrown

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1import io.kotest.core.spec.style.AnnotationSpec2class MyAnnotationSpec : AnnotationSpec() {3fun test1() {4fail("some reason")5}6fun test2() {7fail("some reason")8}9fun test3() {10fail("some reason")11}12}13import io.kotest.core.spec.style.FunSpec14class MyFunSpec : FunSpec({15test("test1") {16fail("some reason")17}18test("test2") {19fail("some reason")20}21test("test3") {22fail("some reason")23}24})25import io.kotest.core.spec.style.StringSpec26class MyStringSpec : StringSpec({27"test1" {28fail("some reason")29}30"test2" {31fail("some reason")32}33"test3" {34fail("some reason")35}36})37import io.kotest.core.spec.style.WordSpec38class MyWordSpec : WordSpec({39"test1" should {40"do something" {41fail("some reason")42}43}44"test2" should {45"do something" {46fail("some reason")47}48}49"test3" should {50"do something" {51fail("some reason")52}53}54})55import io.kotest.core.spec.style.BehaviorSpec56class MyBehaviorSpec : BehaviorSpec({57Given("something") {58When("something happens") {59Then("something else happens") {60fail("some reason")61}62}63}64Given("something") {65When("something happens") {66Then("something else happens") {67fail("some reason")68}69}70}71Given("something") {72When("something happens") {73Then("something else happens") {74fail("some reason")75}76}77}78})79import io.kotest.core.spec.style.ExpectSpec80class MyExpectSpec : ExpectSpec({81expect("something") {82context("something happens") {83expect("something else happens") {84fail("some reason")85}86}87}

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failWrongExceptionThrown

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1class MyTest : AnnotationSpec() {2fun afterEach() {3failWrongExceptionThrown()4}5fun test1() {6}7fun test2() {8}9}10class MyTest : StringSpec() {11override fun afterSpec(spec: Spec) {12failWrongExceptionThrown()13}14init {15"test1" {16}17"test2" {18}19}20}21class MyTest : FreeSpec() {22override fun afterSpec(spec: Spec) {23failWrongExceptionThrown()24}25init {26"test1" {27}28"test2" {29}30}31}32class MyTest : ExpectSpec() {33override fun afterSpec(spec: Spec) {34failWrongExceptionThrown()35}36init {37"test1" {38}39"test2" {40}41}42}43class MyTest : DescribeSpec() {44override fun afterSpec(spec: Spec) {45failWrongExceptionThrown()46}47init {48"test1" {49}50"test2" {51}52}53}54class MyTest : FeatureSpec() {55override fun afterSpec(spec: Spec) {56failWrongExceptionThrown()57}58init {59"test1" {60}61"test2" {62}63}64}65class MyTest : ShouldSpec() {66override fun afterSpec(spec: Spec) {67failWrongExceptionThrown()68}69init {70"test1" {71}72"test2" {73}74}75}76class MyTest : WordSpec() {77override fun afterSpec(spec: Spec) {78failWrongExceptionThrown()79}80init {81"test1" {82}

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