DESCRIBE THE ISSUE IN DETAIL:

Sample project attached.

The issue appears to be that app modules which leverage test fixtures to share code with com.android.test modules fails to be correctly included into the test APK. This causes the com.android.test module tests to crash with NoClassDefFoundErrors.

If the com.android.test module refers to a library module's test fixture then this appears to work ok.

AndroidStudio can see the classes from the app module's test fixture correctly.

This is causing heartache due to AS Chipmunk being based upon a version of IntelliJ that treats source files referenced by more than one project module as an error, causing our previous approach of using manual source set definitions referring to the test fixture source to no longer work well. Thus, we might be stuck on Bumblebee/7.1 until this gets fixed.

STEPS TO REPRODUCE:

Unpack the sample project
run ./gradlew :appTests:connectedCheck
Observe that logcat contains the following error:

06-01 15:52:14.206 24305 24329 I TestRunner: started: appFixture(bug.repro.testfixturerepro.TestModuleTest)
06-01 15:52:14.212 24305 24329 E TestRunner: failed: appFixture(bug.repro.testfixturerepro.TestModuleTest)
06-01 15:52:14.212 24305 24329 E TestRunner: ----- begin exception -----
06-01 15:52:14.217 24305 24329 E TestRunner: java.lang.NoClassDefFoundError: Failed resolution of: Lbug/repro/testfixturerepro/AppTestFixture;
06-01 15:52:14.217 24305 24329 E TestRunner: 	at bug.repro.testfixturerepro.TestModuleTest.appFixture(TestModuleTest.java:10)
06-01 15:52:14.217 24305 24329 E TestRunner: 	at java.lang.reflect.Method.invoke(Native Method)
06-01 15:52:14.217 24305 24329 E TestRunner: 	at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:59)
06-01 15:52:14.217 24305 24329 E TestRunner: 	at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
06-01 15:52:14.217 24305 24329 E TestRunner: 	at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:56)
06-01 15:52:14.217 24305 24329 E TestRunner: 	at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
06-01 15:52:14.217 24305 24329 E TestRunner: 	at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
06-01 15:52:14.217 24305 24329 E TestRunner: 	at org.junit.runners.BlockJUnit4ClassRunner$1.evaluate(BlockJUnit4ClassRunner.java:100)
06-01 15:52:14.217 24305 24329 E TestRunner: 	at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:366)
06-01 15:52:14.217 24305 24329 E TestRunner: 	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:103)
06-01 15:52:14.217 24305 24329 E TestRunner: 	at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:63)
06-01 15:52:14.217 24305 24329 E TestRunner: 	at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
06-01 15:52:14.217 24305 24329 E TestRunner: 	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
06-01 15:52:14.217 24305 24329 E TestRunner: 	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
06-01 15:52:14.217 24305 24329 E TestRunner: 	at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
06-01 15:52:14.217 24305 24329 E TestRunner: 	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
06-01 15:52:14.217 24305 24329 E TestRunner: 	at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
06-01 15:52:14.217 24305 24329 E TestRunner: 	at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
06-01 15:52:14.217 24305 24329 E TestRunner: 	at org.junit.runners.Suite.runChild(Suite.java:128)
06-01 15:52:14.217 24305 24329 E TestRunner: 	at org.junit.runners.Suite.runChild(Suite.java:27)
06-01 15:52:14.217 24305 24329 E TestRunner: 	at org.junit.runners.ParentRunner$4.run(ParentRunner.java:331)
06-01 15:52:14.217 24305 24329 E TestRunner: 	at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:79)
06-01 15:52:14.217 24305 24329 E TestRunner: 	at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:329)
06-01 15:52:14.217 24305 24329 E TestRunner: 	at org.junit.runners.ParentRunner.access$100(ParentRunner.java:66)
06-01 15:52:14.217 24305 24329 E TestRunner: 	at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:293)
06-01 15:52:14.217 24305 24329 E TestRunner: 	at org.junit.runners.ParentRunner$3.evaluate(ParentRunner.java:306)
06-01 15:52:14.217 24305 24329 E TestRunner: 	at org.junit.runners.ParentRunner.run(ParentRunner.java:413)
06-01 15:52:14.217 24305 24329 E TestRunner: 	at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
06-01 15:52:14.217 24305 24329 E TestRunner: 	at org.junit.runner.JUnitCore.run(JUnitCore.java:115)
06-01 15:52:14.217 24305 24329 E TestRunner: 	at androidx.test.internal.runner.TestExecutor.execute(TestExecutor.java:56)
06-01 15:52:14.217 24305 24329 E TestRunner: 	at androidx.test.runner.AndroidJUnitRunner.onStart(AndroidJUnitRunner.java:444)
06-01 15:52:14.217 24305 24329 E TestRunner: 	at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:2248)
06-01 15:52:14.217 24305 24329 E TestRunner: Caused by: java.lang.ClassNotFoundException: Didn't find class "bug.repro.testfixturerepro.AppTestFixture" on path: DexPathList[[zip file "/system/framework/android.test.runner.jar", zip file "/system/framework/android.test.mock.jar", zip file "/system/framework/android.test.base.jar", zip file "/data/app/~~DlczcewOeyCvPpX1NvM82A==/bug.repro.testfixturerepro.exttests-rgzMVn5WFKtZtXXkJdDUhA==/base.apk", zip file "/data/app/~~utYPoeAE68PHed57CQyxdA==/bug.repro.testfixturerepro-XWa-cxCF8fB28kD8XmHDWA==/base.apk"],nativeLibraryDirectories=[/data/app/~~DlczcewOeyCvPpX1NvM82A==/bug.repro.testfixturerepro.exttests-rgzMVn5WFKtZtXXkJdDUhA==/lib/arm64, /data/app/~~utYPoeAE68PHed57CQyxdA==/bug.repro.testfixturerepro-XWa-cxCF8fB28kD8XmHDWA==/lib/arm64, /system/lib64, /system_ext/lib64]]
06-01 15:52:14.217 24305 24329 E TestRunner: 	at dalvik.system.BaseDexClassLoader.findClass(BaseDexClassLoader.java:218)
06-01 15:52:14.217 24305 24329 E TestRunner: 	at java.lang.ClassLoader.loadClass(ClassLoader.java:379)
06-01 15:52:14.217 24305 24329 E TestRunner: 	at java.lang.ClassLoader.loadClass(ClassLoader.java:312)
06-01 15:52:14.217 24305 24329 E TestRunner: 	... 32 more
06-01 15:52:14.217 24305 24329 E TestRunner: ----- end exception -----
06-01 15:52:14.232 24305 24329 I TestRunner: finished: appFixture(bug.repro.testfixturerepro.TestModuleTest)

Studio Build: Chipmunk | 2021.2.1 Patch 1 Version of Gradle Plugin: 7.2.1 Version of Gradle: 7.4.2 (repro project uses 7.3.3) Version of Java: 11.0.14 (Azul Systems, Inc. 11.0.14+9-LTS) OS: Mac OS X 12.4 aarch64