Hilt test throws java.lang.RuntimeException on run time

[Hungon]

Summary

Using the latest version 2.41, we encountered the exception on the local machine when executing tests, but this does not happen on CI.(Every test succeed)

An error like this:

java.lang.RuntimeException: Hilt test, SampleTest, is missing generated file: domain.SampleTest_TestComponentDataSupplier. Check that the test class is annotated with @HiltAndroidTest and that the processor is running over your test.

    at dagger.hilt.android.internal.testing.TestComponentDataSupplier.get(TestComponentDataSupplier.java:39)
    at dagger.hilt.android.internal.testing.TestApplicationComponentManager.testComponentData(TestApplicationComponentManager.java:313)
    at dagger.hilt.android.internal.testing.TestApplicationComponentManager.requiredModules(TestApplicationComponentManager.java:293)
    at dagger.hilt.android.internal.testing.TestApplicationComponentManager.tryToCreateComponent(TestApplicationComponentManager.java:262)
    at dagger.hilt.android.internal.testing.TestApplicationComponentManager.setHasHiltTestRule(TestApplicationComponentManager.java:130)
    at dagger.hilt.android.internal.testing.MarkThatRulesRanRule$1.evaluate(MarkThatRulesRanRule.java:107)
    at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
    at org.robolectric.RobolectricTestRunner$HelperTestRunner$1.evaluate(RobolectricTestRunner.java:570)
    at org.robolectric.internal.SandboxTestRunner$2.lambda$evaluate$0(SandboxTestRunner.java:278)
    at org.robolectric.internal.bytecode.Sandbox.lambda$runOnMainThread$0(Sandbox.java:89)
    at java.base/java.util.concurrent.FutureTask.run(FutureTask.java:264)
    at java.base/java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1128)
    at java.base/java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:628)
    at java.base/java.lang.Thread.run(Thread.java:829)
Caused by: java.lang.ClassNotFoundException: domain.SampleTest_TestComponentDataSupplier
    at org.robolectric.internal.bytecode.SandboxClassLoader.getByteCode(SandboxClassLoader.java:182)
    at org.robolectric.internal.bytecode.SandboxClassLoader.maybeInstrumentClass(SandboxClassLoader.java:140)
    at org.robolectric.internal.bytecode.SandboxClassLoader.lambda$loadClass$0(SandboxClassLoader.java:126)
    at org.robolectric.util.PerfStatsCollector.measure(PerfStatsCollector.java:53)
    at org.robolectric.internal.bytecode.SandboxClassLoader.loadClass(SandboxClassLoader.java:126)
    at java.base/java.lang.ClassLoader.loadClass(ClassLoader.java:522)
    at java.base/java.lang.Class.forName0(Native Method)
    at java.base/java.lang.Class.forName(Class.java:315)
    at dagger.hilt.android.internal.testing.TestComponentDataSupplier.get(TestComponentDataSupplier.java:30)
    ... 13 more

Process finished with exit code 255

Code we can produce:

@HiltAndroidTest
@RunWith(AndroidJUnit4::class)
@Config(sdk = [28], application = HiltTestApplication::class)
class SampleTest {

    @get:Rule
    var hiltRule = HiltAndroidRule(this)

    @Inject
    lateinit var sample: Sample

    @Before
    fun init() {
        hiltRule.inject()
    }

    @Test 
    fun testSample() {
        // test code
    }
}

Versions

• IDE: Android Studio Bumblebee
• Dagger-hilt: 2.41
• Robolectric: 4.6

Is there any info you need?

[bcorso]

@Hungon it sounds like you may not have added the Dagger compiler to your tests. Can you check that you have the following dependency:

dependencies {
    // ...
    kaptTest 'com.google.dagger:hilt-compiler:2.41'
}

[Hungon]

@bcorso Thank you for your help. Let me check it.