How to use TestScope.withCoroutineContext method of io.kotest.engine.test.scopes.scopes class

Best Kotest code snippet using io.kotest.engine.test.scopes.scopes.TestScope.withCoroutineContext

coroutineDispatcherFactoryInterceptor.kt

Source: coroutineDispatcherFactoryInterceptor.kt Github

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1package io.kotest.engine.test.interceptors2import io.kotest.core.concurrency.CoroutineDispatcherFactory3import io.kotest.core.test.TestCase4import io.kotest.core.test.TestResult5import io.kotest.core.test.TestScope6import io.kotest.engine.concurrency.FixedThreadCoroutineDispatcherFactory7import io.kotest.engine.test.scopes.withCoroutineContext8import io.kotest.mpp.Logger9import kotlinx.coroutines.CoroutineDispatcher10import kotlinx.coroutines.test.TestCoroutineDispatcher11import kotlinx.coroutines.test.TestDispatcher12import kotlin.coroutines.coroutineContext13@ExperimentalStdlibApi14internal actual fun coroutineDispatcherFactoryInterceptor(15 defaultCoroutineDispatcherFactory: CoroutineDispatcherFactory16): TestExecutionInterceptor = CoroutineDispatcherFactoryInterceptor(defaultCoroutineDispatcherFactory)17/​**18 * Switches execution onto a dispatcher provided by a [CoroutineDispatcherFactory].19 *20 * If the coroutine is an instance of [TestDispatcher] then the coroutine will not be changed.21 */​22@ExperimentalStdlibApi23internal class CoroutineDispatcherFactoryInterceptor(24 private val defaultCoroutineDispatcherFactory: CoroutineDispatcherFactory25) : TestExecutionInterceptor {26 private val logger = Logger(CoroutineDispatcherFactoryInterceptor::class)27 override suspend fun intercept(28 testCase: TestCase,29 scope: TestScope,30 test: suspend (TestCase, TestScope) -> TestResult31 ): TestResult {32 val currentDispatcher = coroutineContext[CoroutineDispatcher]33 /​/​ we don't override if we've set a test dispatcher on this already34 return if (currentDispatcher is TestDispatcher) {35 test(testCase, scope)36 } else {37 val userFactory = testCase.spec.coroutineDispatcherFactory ?: testCase.spec.coroutineDispatcherFactory()38 val threads = testCase.spec.threads ?: testCase.spec.threads() ?: 139 logger.log { Pair(testCase.name.testName, "userFactory=$userFactory; threads=$threads") }40 val f = when {41 userFactory != null -> userFactory42 threads > 1 -> FixedThreadCoroutineDispatcherFactory(threads, false)43 else -> defaultCoroutineDispatcherFactory44 }45 logger.log { Pair(testCase.name.testName, "Switching dispatcher using factory $f") }46 f.withDispatcher(testCase) {47 test(testCase, scope.withCoroutineContext(coroutineContext))48 }49 }50 }51}...

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TimeoutInterceptor.kt

Source: TimeoutInterceptor.kt Github

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1package io.kotest.engine.test.interceptors2import io.kotest.core.test.TestCase3import io.kotest.core.test.TestResult4import io.kotest.core.test.TestScope5import io.kotest.engine.test.scopes.withCoroutineContext6import io.kotest.mpp.Logger7import kotlinx.coroutines.withTimeout8import kotlin.time.Duration9import kotlin.time.TimeMark10/​**11 * A [TestExecutionInterceptor] that installs a general timeout for all invocations of a test.12 */​13internal class TimeoutInterceptor(14 private val mark: TimeMark,15) : TestExecutionInterceptor {16 private val logger = Logger(TimeoutInterceptor::class)17 override suspend fun intercept(18 testCase: TestCase,19 scope: TestScope,20 test: suspend (TestCase, TestScope) -> TestResult21 ): TestResult {22 /​/​ this timeout applies to the test itself. If the test has multiple invocations then23 /​/​ this timeout applies across all invocations. In other words, if a test has invocations = 3,24 /​/​ each test takes 300ms, and a timeout of 800ms, this would fail, becauase 3 x 300 > 800.25 logger.log { Pair(testCase.name.testName, "Switching context to add timeout ${testCase.config.timeout}") }26 return when (val timeout = testCase.config.timeout) {27 null -> test(testCase, scope)28 else -> try {29 withTimeout(timeout) {30 test(testCase, scope.withCoroutineContext(coroutineContext))31 }32 } catch (t: Throwable) {33 logger.log { Pair(testCase.name.testName, "Caught timeout $t") }34 TestResult.Error(mark.elapsedNow(), TestTimeoutException(timeout, testCase.name.testName))35 }36 }37 }38}39/​**40 * Exception used for when a test exceeds its timeout.41 */​42open class TestTimeoutException(val timeout: Duration, val testName: String) :43 Exception("Test '${testName}' did not complete within $timeout")...

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CoroutineLoggingInterceptor.kt

Source: CoroutineLoggingInterceptor.kt Github

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1package io.kotest.engine.test.interceptors2import io.kotest.common.ExperimentalKotest3import io.kotest.core.config.ProjectConfiguration4import io.kotest.core.test.TestCase5import io.kotest.core.test.TestResult6import io.kotest.core.test.TestScope7import io.kotest.engine.test.TestExtensions8import io.kotest.engine.test.logging.SerialLogExtension9import io.kotest.engine.test.logging.TestLogger10import io.kotest.engine.test.logging.TestScopeLoggingCoroutineContextElement11import io.kotest.engine.test.scopes.withCoroutineContext12import io.kotest.mpp.Logger13import kotlinx.coroutines.withContext14@ExperimentalKotest15internal class CoroutineLoggingInterceptor(private val configuration: ProjectConfiguration) : TestExecutionInterceptor {16 private val logger = Logger(CoroutineLoggingInterceptor::class)17 override suspend fun intercept(18 testCase: TestCase,19 scope: TestScope,20 test: suspend (TestCase, TestScope) -> TestResult21 ): TestResult {22 val extensions = TestExtensions(configuration.registry).logExtensions(testCase)23 return when {24 configuration.logLevel.isDisabled() || extensions.isEmpty() -> {25 logger.log { Pair(testCase.name.testName, "Test logging is disabled (exts = $extensions)") }26 test(testCase, scope)27 }28 else -> {29 val logger = TestLogger(configuration.logLevel)30 withContext(TestScopeLoggingCoroutineContextElement(logger)) {31 test(testCase, scope.withCoroutineContext(coroutineContext))32 }.apply {33 extensions.map { SerialLogExtension(it) }.forEach { extension ->34 runCatching {35 extension.handleLogs(testCase, logger.logs.filter { it.level >= configuration.logLevel })36 }37 }38 }39 }40 }41 }42}...

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InvocationTimeoutInterceptor.kt

Source: InvocationTimeoutInterceptor.kt Github

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1package io.kotest.engine.test.interceptors2import io.kotest.core.test.TestCase3import io.kotest.core.test.TestResult4import io.kotest.core.test.TestScope5import io.kotest.core.test.TestType6import io.kotest.engine.test.scopes.withCoroutineContext7import io.kotest.mpp.Logger8import kotlinx.coroutines.TimeoutCancellationException9import kotlinx.coroutines.withTimeoutOrNull10import kotlin.math.min11import kotlin.time.Duration12/​**13 * Installs an invocation timeout.14 */​15internal object InvocationTimeoutInterceptor : TestExecutionInterceptor {16 private val logger = Logger(this::class)17 override suspend fun intercept(18 testCase: TestCase,19 scope: TestScope,20 test: suspend (TestCase, TestScope) -> TestResult21 ): TestResult {22 return if (testCase.type == TestType.Container) {23 test(testCase, scope)24 } else {25 /​/​ note: the invocation timeout cannot be larger than the test case timeout26 val timeout = min(27 testCase.config.timeout?.inWholeMilliseconds ?: 10000000,28 testCase.config.invocationTimeout?.inWholeMilliseconds ?: 1000000029 )30 logger.log { Pair(testCase.name.testName, "Switching context to add invocationTimeout $timeout") }31 return try {32 /​/​ we use orNull because we want to disambiguate between our timeouts and user level timeouts33 /​/​ user level timeouts will throw an exception, ours will return null34 withTimeoutOrNull(timeout) {35 test(testCase, scope.withCoroutineContext(coroutineContext))36 } ?: throw TestTimeoutException(Duration.milliseconds(timeout), testCase.name.testName)37 } catch (t: TimeoutCancellationException) {38 logger.log { Pair(testCase.name.testName, "Caught user timeout $t") }39 throw t40 }41 }42 }43}...

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scopes.kt

Source: scopes.kt Github

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1package io.kotest.engine.test.scopes2import io.kotest.core.concurrency.CoroutineDispatcherFactory3import io.kotest.core.config.ProjectConfiguration4import io.kotest.core.names.DuplicateTestNameMode5import io.kotest.core.test.TestCase6import io.kotest.core.test.TestScope7import io.kotest.engine.listener.TestEngineListener8import kotlin.coroutines.CoroutineContext9/​**10 * Returns a new [TestScope] which uses the given [coroutineContext] with the other methods11 * delegating to the receiver context.12 */​13internal fun TestScope.withCoroutineContext(coroutineContext: CoroutineContext): TestScope = when {14 this.coroutineContext == coroutineContext -> this15 this is TestScopeWithCoroutineContext -> TestScopeWithCoroutineContext(delegate, coroutineContext)16 else -> TestScopeWithCoroutineContext(this, coroutineContext)17}18private class TestScopeWithCoroutineContext(19 val delegate: TestScope,20 override val coroutineContext: CoroutineContext21) : TestScope by delegate {22 override fun toString(): String = "TestCaseContext [$coroutineContext]"23}24/​**25 * Creates a [TestScope] suitable for use in a single instance runner.26 */​27fun createSingleInstanceTestScope(28 testCase: TestCase,29 coroutineContext: CoroutineContext,30 mode: DuplicateTestNameMode,31 listener: TestEngineListener,32 dispatcherFactory: CoroutineDispatcherFactory,33 configuration: ProjectConfiguration,34): TestScope {35 return DuplicateNameHandlingTestScope(36 testCase.spec.duplicateTestNameMode ?: configuration.duplicateTestNameMode,37 InOrderTestScope(38 testCase,39 coroutineContext,40 mode,41 listener,42 dispatcherFactory,43 configuration,44 )45 )46}...

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TestDispatcherInterceptor.kt

Source: TestDispatcherInterceptor.kt Github

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1package io.kotest.engine.test.interceptors2import io.kotest.core.test.TestCase3import io.kotest.core.test.TestResult4import io.kotest.core.test.TestScope5import io.kotest.engine.test.scopes.withCoroutineContext6import io.kotest.mpp.Logger7import kotlinx.coroutines.CoroutineDispatcher8import kotlinx.coroutines.CoroutineName9import kotlinx.coroutines.ExperimentalCoroutinesApi10import kotlinx.coroutines.test.TestDispatcher11import kotlinx.coroutines.test.UnconfinedTestDispatcher12import kotlinx.coroutines.withContext13import kotlin.coroutines.coroutineContext14/​**15 * A [TestExecutionInterceptor] that installs a [UnconfinedTestDispatcher] as the coroutine16 * dispatcher for the test.17 *18 * If the current dispatcher is already a [TestDispatcher] then this interceptor is a no-op.19 */​20@ExperimentalCoroutinesApi21@ExperimentalStdlibApi22actual class TestDispatcherInterceptor : TestExecutionInterceptor {23 private val logger = Logger(TestDispatcherInterceptor::class)24 override suspend fun intercept(25 testCase: TestCase,26 scope: TestScope,27 test: suspend (TestCase, TestScope) -> TestResult28 ): TestResult {29 return when (coroutineContext[CoroutineDispatcher]) {30 is TestDispatcher -> test(testCase, scope)31 else -> {32 val dispatcher = UnconfinedTestDispatcher()33 logger.log { Pair(testCase.name.testName, "Switching context to StandardTestDispatcher: $dispatcher") }34 withContext(dispatcher + CoroutineName("wibble")) {35 test(testCase, scope.withCoroutineContext(dispatcher))36 }37 }38 }39 }40}...

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TestCoroutineInterceptor.kt

Source: TestCoroutineInterceptor.kt Github

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1package io.kotest.engine.test.interceptors2import io.kotest.core.test.TestCase3import io.kotest.core.test.TestResult4import io.kotest.core.test.TestScope5import io.kotest.engine.test.scopes.withCoroutineContext6import io.kotest.mpp.Logger7import kotlinx.coroutines.ExperimentalCoroutinesApi8import kotlinx.coroutines.test.runTest9/​**10 * A [TestExecutionInterceptor] that uses [runTest] from the coroutine library11 * to install test dispatchers.12 *13 * This setting cannot be nested.14 */​15@ExperimentalCoroutinesApi16@ExperimentalStdlibApi17actual class TestCoroutineInterceptor : TestExecutionInterceptor {18 private val logger = Logger(TestCoroutineInterceptor::class)19 override suspend fun intercept(20 testCase: TestCase,21 scope: TestScope,22 test: suspend (TestCase, TestScope) -> TestResult23 ): TestResult {24 var result: TestResult = TestResult.Ignored25 logger.log { Pair(testCase.name.testName, "Switching context to coroutines runTest") }26 runTest {27 result = test(testCase, scope.withCoroutineContext(this.coroutineContext))28 }29 return result30 }31}...

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SupervisorScopeInterceptor.kt

Source: SupervisorScopeInterceptor.kt Github

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1package io.kotest.engine.test.interceptors2import io.kotest.core.test.TestCase3import io.kotest.core.test.TestResult4import io.kotest.core.test.TestScope5import io.kotest.engine.test.scopes.withCoroutineContext6import kotlinx.coroutines.supervisorScope7/​**8 * We don't want any errors in child coroutines to propagate out and cancel all the coroutines used for9 * the specs /​ parent tests, therefore we install a [supervisorScope]. This scope adds a barrier10 * so that any child coroutines from this point on do not cancel any parent coroutines.11 */​12internal object SupervisorScopeInterceptor : TestExecutionInterceptor {13 override suspend fun intercept(14 testCase: TestCase,15 scope: TestScope,16 test: suspend (TestCase, TestScope) -> TestResult17 ): TestResult {18 /​/​ a timeout in a parent test will still cause this to fail19 return supervisorScope {20 test(testCase, scope.withCoroutineContext(coroutineContext))21 }22 }23}...

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TestScope.withCoroutineContext

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1fun testWithCoroutineContext() = withCoroutineContext {2 delay(100)3 println("Hello World")4}5fun testWithCoroutineContext() = withCoroutineContext {6 delay(100)7 println("Hello World")8}9fun testWithCoroutineContext() = withCoroutineContext {10 delay(100)11 println("Hello World")12}13fun testWithCoroutineContext() = withCoroutineContext {14 delay(100)15 println("Hello World")16}17fun testWithCoroutineContext() = withCoroutineContext {18 delay(100)19 println("Hello World")20}21fun testWithCoroutineContext() = withCoroutineContext {22 delay(100)23 println("Hello World")24}25fun testWithCoroutineContext() = withCoroutineContext {26 delay(100)27 println("Hello World")28}29fun testWithCoroutineContext() = withCoroutineContext {30 delay(100)31 println("Hello World")32}33fun testWithCoroutineContext() = withCoroutineContext {34 delay(100)35 println("Hello World")36}37fun testWithCoroutineContext() = withCoroutineContext {38 delay(100)39 println("Hello World")40}41fun testWithCoroutineContext() = withCoroutineContext {42 delay(100)

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TestScope.withCoroutineContext

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1val scope = withCoroutineContext(coroutineContext)2scope.launch { }3scope.advanceTimeBy(1000)4scope.runBlockingTest {5}6scope.cancel()7val dispatcher = TestCoroutineDispatcher()8dispatcher.launch { }9dispatcher.advanceTimeBy(1000)10dispatcher.runBlockingTest {11}12dispatcher.cleanupTestCoroutines()13val exceptionHandler = TestCoroutineExceptionHandler()14exceptionHandler.launch { }15exceptionHandler.assertThrows<Exception> { }16exceptionHandler.cleanupTestCoroutines()17val scope = TestCoroutineScope()18scope.launch { }19scope.advanceTimeBy(1000)20scope.runBlockingTest {21}22scope.cleanupTestCoroutines()23val scope = TestCoroutineScope(coroutineContext)24scope.launch { }25scope.advanceTimeBy(1000)26scope.runBlockingTest {27}28scope.cleanupTestCoroutines()29val scope = TestCoroutineScope(dispatcher)

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TestScope.withCoroutineContext

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1suspend fun TestScope.withCoroutineContext ( context : CoroutineContext , block : suspend TestScope . ( ) -> Unit )2suspend fun TestScope.withCoroutineContext ( context : CoroutineContext , block : suspend TestScope . ( ) -> Unit )3suspend fun TestScope.withCoroutineContext ( context : CoroutineContext , block : suspend TestScope . ( ) -> Unit )4suspend fun TestScope.withCoroutineContext ( context : CoroutineContext , block : suspend TestScope . ( ) -> Unit )5suspend fun TestScope.withCoroutineContext ( context : CoroutineContext , block : suspend TestScope . ( ) -> Unit )6suspend fun TestScope.withCoroutineContext ( context : CoroutineContext , block : suspend TestScope . ( ) -> Unit )7suspend fun TestScope.withCoroutineContext ( context : CoroutineContext , block : suspend TestScope . ( ) -> Unit )8suspend fun TestScope.withCoroutineContext ( context : CoroutineContext , block : suspend TestScope . ( ) -> Unit )9suspend fun TestScope.withCoroutineContext ( context : CoroutineContext ,

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TestScope.withCoroutineContext

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1}2}3}4}5}6}

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