How to use interceptors class of io.kotest.engine package

Best Kotest code snippet using io.kotest.engine.interceptors

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1+import io.kotest.engine.interceptors.SpecInterceptContext2+import io.kotest.engine.interceptors.SpecInterceptor3+import io.kotest.engine.interceptors.SpecRunnerInterceptor4+import io.kotest.engine.interceptors.TestCaseInterceptor5+import io.kotest.engine.interceptors.TestContext6+import io.kotest.engine.interceptors.TestInterceptor

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interceptors

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1+import io.kotest.engine.interceptors.AbstractProjectExtensionInterceptor2+import io.kotest.engine.interceptors.ProjectExtensionInterceptor3+import io.kotest.core.extensions.ProjectExtension4+import io.kotest.core.listeners.ProjectListener5+import io.kotest.core.spec.Spec6+import io.kotest.core.spec.style.FunSpec7+import io.kotest.matchers.shouldBe8+class ProjectExtensionInterceptorTest : FunSpec({9+ test("ProjectExtensionInterceptor should invoke ProjectExtension#beforeProject") {10+ val projectExtension = object : ProjectExtension {11+ override suspend fun beforeProject() {12+ }13+ }14+ val interceptor = object : AbstractProjectExtensionInterceptor() {15+ override val extensions: List<ProjectExtension> = listOf(projectExtension)16+ }17+ interceptor.intercept {18+ }19+ }20+ test("ProjectExtensionInterceptor should invoke ProjectExtension#afterProject") {21+ val projectExtension = object : ProjectExtension {22+ override suspend fun afterProject() {23+ }24+ }25+ val interceptor = object : AbstractProjectExtensionInterceptor() {26+ override val extensions: List<ProjectExtension> = listOf(projectExtension)27+ }28+ interceptor.intercept {29+ }30+ }31+ test("ProjectExtensionInterceptor should invoke ProjectListener#beforeProject") {32+ val projectListener = object : ProjectListener {33+ override suspend fun beforeProject() {34+ }35+ }36+ val interceptor = object : AbstractProjectExtensionInterceptor() {37+ override val listeners: List<ProjectListener> = listOf(projectListener)38+ }39+ interceptor.intercept {40+ }41+ }42+ test("ProjectExtensionInterceptor should invoke ProjectListener#afterProject") {

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interceptors

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1val interceptor = object : Interceptor {2 override suspend fun intercept(3 execute: suspend (TestCaseContext, suspend () -> TestResult) -> TestResult4 ): TestResult {5 }6}7KotestEngineLauncher()8 .withInterceptors(interceptor)9 .execute()10KotestEngineLauncher()11 .withSpecs(listOf("com.example.MySpec"))12KotestEngineLauncher()13 .withSpecs(listOf(MySpec::class))14KotestEngineLauncher()15 .withSpecs(listOf(MySpec::class.java))16KotestEngineLauncher()

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1+class MyTestEngineListener : EngineListener {2+ override fun engineStarted(classes: List<KClass<out Spec>>) {3+ println("Engine started")4+ }5+ override fun engineFinished(t: List<Throwable>) {6+ println("Engine finished")7+ }8+ override fun specStarted(kclass: KClass<out Spec>) {9+ println("Spec started: ${kclass.simpleName}")10+ }11+ override fun specFinished(kclass: KClass<out Spec>, t: Throwable?) {12+ println("Spec finished: ${kclass.simpleName}")13+ }14+ override fun testStarted(testCase: TestCase) {15+ println("Test started: ${testCase.name}")16+ }17+ override fun testFinished(testCase: TestCase, result: TestResult) {18+ println("Test finished: ${testCase.name} - ${result.status}")19+ }20+ override fun testIgnored(testCase: TestCase, reason: String?) {21+ println("Test ignored: ${testCase.name} - $reason")22+ }23+}24+class MyTestEngineListenerTest : StringSpec({25+ listener(MyTestEngineListener())26+ "A test" {27+ }28+})29+class MySpecListener : SpecExecutionListener {30+ override fun beforeSpecClass(kclass: KClass<out Spec>, spec: Spec) {31+ println("Before spec: ${kclass.simpleName}")32+ }33+ override fun afterSpecClass(kclass: KClass<out Spec>, t: Throwable?, spec: Spec) {34+ println("After spec: ${kclass.simpleName}")35+ }36+ override fun beforeTest(testCase: TestCase) {37+ println("Before test: ${testCase.name}")38+ }39+ override fun afterTest(testCase: TestCase, result: TestResult)

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1class TestListener : AbstractTestExecutionListener() {2 override suspend fun testStarted(testCase: TestCase) {3 println("Test started: ${testCase.description}")4 }5 override suspend fun testFinished(6 ) {7 println("Test finished: ${testCase.description} with result $result")8 }9}

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1val spec = object : FunSpec() {2 init {3 test("a test") {4 }5 }6}7engine.execute(listOf(spec)).errors().first().message shouldBe "boom"

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1 fun `test with interceptors`() {2 val test = TestWithInterceptors()3 test.interceptorTest()4 }5}6class TestWithInterceptors {7 @Interceptor(TestInterceptor::class)8 fun `test with interceptors`() {9 println("test with interceptors")10 }11}

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1class MySpec : FunSpec({2})3class MySpec : FunSpec({4})5@TestCaseOrder(TestCaseOrderType.Randomized, 1234)6class MySpec : FunSpec({7})8@IsolationMode(IsolationMode.InstancePerTest)9class MySpec : FunSpec({10})11class MySpec : FunSpec({12 test("test case 1").config(IsolationMode.InstancePerTest) {13 }14})

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1@TestCaseOrder(TestCaseOrderType.Randomized, 1234)2class MySpec : FunSpec({3})4@IsolationMode(IsolationMode.InstancePerTest)5class MySpec : FunSpec({6})7class MySpec : FunSpec({8 test("test case 1").config(IsolationMode.InstancePerTest) {9 }10})

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1class TestListener : AbstractTestExecutionListener() {2 override suspend fun testStarted(testCase: TestCase) {3 println("Test started: ${testCase.description}")4 }5 override suspend fun testFinished(6 ) {7 println("Test finished: ${testCase.description} with result $result")8 }9}

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1 fun `test with interceptors`() {2 val test = TestWithInterceptors()3 test.interceptorTest()4 }5}6class TestWithInterceptors {7 @Interceptor(TestInterceptor::class)8 fun `test with interceptors`() {9 println("test with interceptors")10 }11}

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Most used methods in interceptors