compose-multiplatform: Integration tests suddenly not working

We had them working after reading through this article (and adding some android classes):

Compose Desktop Template with MVVM

But then we ran into a situation where it was complaining that the lateinit window was never initialized. We tried wrapping the content in a Window {} (both the new version and the deprecated one). Did not work. Then we upgraded to the latest. Now it says scene not found.

kotlin.UninitializedPropertyAccessException: lateinit property scene has not been initialized
	at androidx.compose.ui.test.junit4.DesktopComposeTestRule.getScene(DesktopComposeTestRule.desktop.kt:72)
	at androidx.compose.ui.test.junit4.DesktopComposeTestRule$DesktopTestOwner.getRoots(DesktopComposeTestRule.desktop.kt:210)
	at androidx.compose.ui.test.TestContext.getAllSemanticsNodes$ui_test(TestOwner.kt:95)
	at androidx.compose.ui.test.SemanticsNodeInteraction.fetchSemanticsNodes$ui_test(SemanticsNodeInteraction.kt:79)
	at androidx.compose.ui.test.SemanticsNodeInteraction.fetchOneOrDie(SemanticsNodeInteraction.kt:145)
	at androidx.compose.ui.test.SemanticsNodeInteraction.assertExists(SemanticsNodeInteraction.kt:137)
	at com.ontometrics.mobtimer.view.ShiftViewTests.testTimeChange(ShiftViewTests.kt:30)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
	at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
	at java.base/jdk.internal.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
	at java.base/java.lang.reflect.Method.invoke(Method.java:566)
	at org.junit.platform.commons.util.ReflectionUtils.invokeMethod(ReflectionUtils.java:725)
	at org.junit.jupiter.engine.execution.MethodInvocation.proceed(MethodInvocation.java:60)
	at org.junit.jupiter.engine.execution.InvocationInterceptorChain$ValidatingInvocation.proceed(InvocationInterceptorChain.java:131)
	at org.junit.jupiter.engine.extension.TimeoutExtension.intercept(TimeoutExtension.java:149)
	at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestableMethod(TimeoutExtension.java:140)
	at org.junit.jupiter.engine.extension.TimeoutExtension.interceptTestMethod(TimeoutExtension.java:84)
	at org.junit.jupiter.engine.execution.ExecutableInvoker$ReflectiveInterceptorCall.lambda$ofVoidMethod$0(ExecutableInvoker.java:115)
	at org.junit.jupiter.engine.execution.ExecutableInvoker.lambda$invoke$0(ExecutableInvoker.java:105)
	at org.junit.jupiter.engine.execution.InvocationInterceptorChain$InterceptedInvocation.proceed(InvocationInterceptorChain.java:106)
	at org.junit.jupiter.engine.execution.InvocationInterceptorChain.proceed(InvocationInterceptorChain.java:64)
	at org.junit.jupiter.engine.execution.InvocationInterceptorChain.chainAndInvoke(InvocationInterceptorChain.java:45)
	at org.junit.jupiter.engine.execution.InvocationInterceptorChain.invoke(InvocationInterceptorChain.java:37)
	at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:104)
	at org.junit.jupiter.engine.execution.ExecutableInvoker.invoke(ExecutableInvoker.java:98)
	at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.lambda$invokeTestMethod$7(TestMethodTestDescriptor.java:214)
	at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
	at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.invokeTestMethod(TestMethodTestDescriptor.java:210)
	at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:135)
	at org.junit.jupiter.engine.descriptor.TestMethodTestDescriptor.execute(TestMethodTestDescriptor.java:66)
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:151)
	at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
	at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
	at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)
	at java.base/java.util.ArrayList.forEach(ArrayList.java:1541)
	at org.junit.platform.engine.support.hierarchical.SameThreadHierarchicalTestExecutorService.invokeAll(SameThreadHierarchicalTestExecutorService.java:41)
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$6(NodeTestTask.java:155)
	at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$8(NodeTestTask.java:141)
	at org.junit.platform.engine.support.hierarchical.Node.around(Node.java:137)
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.lambda$executeRecursively$9(NodeTestTask.java:139)
	at org.junit.platform.engine.support.hierarchical.ThrowableCollector.execute(ThrowableCollector.java:73)
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.executeRecursively(NodeTestTask.java:138)
	at org.junit.platform.engine.support.hierarchical.NodeTestTask.execute(NodeTestTask.java:95)

About this issue

Original URL
State: closed
Created 3 years ago
Reactions: 1
Comments: 16 (1 by maintainers)

Most upvoted comments

add that to the readme.

Yeah, we will add this to readme in https://github.com/JetBrains/compose-jb/issues/368.

There is nothing stopping you from writing a junit5 test rule

It is probably not trivial on the user side. And there are a couple of things that are marked as @InternalTestApi

Might be worth adding something that gives a more sensible error message

We can add an assert to all public methods with the message:

Compose test rule isn't initialized:

1. Check if `@get:Rule` is applied:

@get:Rule
val composeRule = createComposeRule()

2. Check if you use JUnit 4, and not JUnit 5. The import of `@Test` should be `org.junit.Test`, not `org.junit.jupiter.api.Test`

I also wonder why the test was working when we first did it.

JUnit 5 can’t use org.junit.Rule. Maybe you had JUnit 5 in your classpath, but marked your tests with org.junit.Test annotation.

igordmn on Nov 1, 2021

Wow, this is bad. Minimal repro looks like:

import androidx.compose.material.Text
import androidx.compose.ui.test.junit4.createComposeRule
import org.junit.Rule
import org.junit.jupiter.api.Test

class ShiftViewTests {
    @get:Rule
    val composeRule = createComposeRule()

    @Test
    fun testTimeChange() {
        composeRule.setContent {
            Text("Test")
        }
    }
}

How did we miss this? Are we still not running desktop tests in Google CI? Seems should turn that on.

cc @igordmn can you take a look?

jimgoog on Oct 31, 2021