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import java.lang.reflect.Parameter | |
import java.util.stream.Stream | |
import kotlin.reflect.KFunction | |
import kotlin.reflect.KParameter | |
import kotlin.reflect.full.callSuspendBy | |
import kotlin.reflect.full.functions | |
import kotlin.reflect.full.hasAnnotation | |
import kotlin.reflect.full.isSubtypeOf | |
import kotlin.reflect.full.isSupertypeOf | |
import kotlin.reflect.typeOf | |
import kotlin.streams.asStream | |
import kotlinx.coroutines.CoroutineScope | |
import kotlinx.coroutines.test.TestScope | |
import kotlinx.coroutines.test.runTest | |
import org.junit.jupiter.api.Test | |
import org.junit.jupiter.api.TestTemplate | |
import org.junit.jupiter.api.extension.ExtendWith | |
import org.junit.jupiter.api.extension.Extension | |
import org.junit.jupiter.api.extension.ExtensionContext | |
import org.junit.jupiter.api.extension.ParameterContext | |
import org.junit.jupiter.api.extension.ParameterResolver | |
import org.junit.jupiter.api.extension.TestTemplateInvocationContext | |
import org.junit.jupiter.api.extension.TestTemplateInvocationContextProvider | |
interface CoroutineTest { | |
val testScope: TestScope | |
get() = TestScope() | |
val dispatchTimeoutMs: Long | |
get() = 60_000L | |
@TestTemplate | |
@ExtendWith(SuspendTestContextProvider::class) | |
fun runSuspendTest(testCase: suspend TestScope.() -> Unit) = testScope.runTest(dispatchTimeoutMs, testCase) | |
} | |
private fun Parameter.isSuspendUnitFun(): Boolean = | |
parameterizedType.typeName == "kotlin.jvm.functions.Function2<? super kotlinx.coroutines.test.TestScope, ? super kotlin.coroutines.Continuation<? super kotlin.Unit>, ?>" | |
private class SuspendTestContextProvider : TestTemplateInvocationContextProvider { | |
override fun supportsTestTemplate(context: ExtensionContext): Boolean = | |
context.requiredTestMethod.parameters.any { it.isSuspendUnitFun() } | |
override fun provideTestTemplateInvocationContexts(context: ExtensionContext): Stream<TestTemplateInvocationContext> = | |
context.requiredTestClass.kotlin.functions.asSequence().mapNotNull { | |
if (it.isSuspend && it.hasAnnotation<Test>()) SuspendTestContext(it) else null | |
}.asStream() | |
} | |
private class SuspendTestContext(private val member: KFunction<*>) : TestTemplateInvocationContext { | |
override fun getDisplayName(invocationIndex: Int): String = member.name | |
override fun getAdditionalExtensions(): List<Extension> = listOf(SuspendTestParameterProvider(member)) | |
} | |
private class SuspendTestParameterProvider(private val member: KFunction<*>) : ParameterResolver { | |
override fun supportsParameter(parameterContext: ParameterContext, extensionContext: ExtensionContext): Boolean = | |
parameterContext.parameter.isSuspendUnitFun() | |
override fun resolveParameter(parameterContext: ParameterContext, extensionContext: ExtensionContext): suspend TestScope.() -> Unit = testScope@{ | |
member.callSuspendBy( | |
buildMap { | |
for (parameter in member.parameters) { | |
when { | |
parameter.kind == KParameter.Kind.INSTANCE -> put(parameter, parameterContext.target.get()) | |
with(parameter.type) { | |
isSubtypeOf(typeOf<CoroutineScope>()) && isSupertypeOf(typeOf<TestScope>()) | |
} -> put(parameter, this@testScope) | |
parameter.isOptional -> {} | |
// Unable to use other parameter resolvers, https://github.com/junit-team/junit5/issues/378 | |
else -> TODO("Unsupported parameter: $parameter") | |
} | |
} | |
} | |
) | |
} | |
} |
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import kotlinx.coroutines.test.TestScope | |
import org.junit.jupiter.api.Test | |
class ExampleTest : CoroutineTest { | |
@Test | |
fun blockingTest() { | |
println("ok") | |
} | |
@Test | |
suspend fun suspendTest() { | |
println("ok") | |
} | |
@Test | |
suspend fun TestScope.suspendTest2() { | |
println(testScheduler.currentTime) | |
} | |
} |
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