我想在 JUnit 中对协程进行一些测试,但遇到了一些问题。代码很简单:
@Test
fun coroutineTest() {
//runBlocking(Unconfined) doesnt work too
runBlocking () {
delay(1000)
println("test")
}
}
但我得到了那个错误
java.lang.RuntimeException: Method myLooper in android.os.Looper not mocked. See http://g.co/androidstudio/not-mocked for details.
at android.os.Looper.myLooper(Looper.java)
at kotlinx.coroutines.experimental.android.MainLooperChecker.checkRunBlocking(HandlerContext.kt:124)
at kotlinx.coroutines.experimental.BuildersKt__BuildersKt.runBlocking(Builders.kt:42)
at kotlinx.coroutines.experimental.BuildersKt.runBlocking(Unknown Source)
at app.deadmc.sometests.tests.ExampleUnitTest.coroutineTest(ExampleUnitTest.kt:22)
我首先想到的是错误的协程上下文。所以可以肯定的是我用过Unconfined
,但这不起作用。
我试过了
android {
// ...
testOptions {
unitTests.returnDefaultValues = true
}
}
但这也不起作用,我收到以下错误:
java.lang.IllegalStateException: runBlocking is not allowed in Android main looper thread
但是根本没有Android main looper
!
如何在 JUnit 中运行阻塞协程?