Why is the Android test runner reporting “Empty test suite”?

Question

I am banging my head against the wall here trying to figure out why IntelliJ/Android is reporting \"Empty test suite\". I have a small project with two IntelliJ Modules (\"

Answer 1

My issue was caused by an exception being thrown in the @BeforeClass method of my test case. It some how wasn't causing the test to fail - I only found it by inspecting the logcat output.

I fixed the exception and suddenly my tests were running!

Answer 2

The accepted answer didn't solve my problem. So I decided to copy ExampleInstrumentedTest which is created by default in Android Studio and runs without any problems, renamed it during the copy process (no Refactor->Rename after copying!) and pasted the contents of my unit test into it. After that the error disappeared.

Answer 3

I don't know if it helps for Android Studio, but I had some kind of Intellij-Gradle conflict. Solved it by "right-clicking" on the test-file and hit "compile file ...Test.java". After that I could run single tests again.

Answer 4

I had tests that were running fine until gradle and android studio got upgraded.

Apart from adding a default constructor to your tests, you might need to do some of these things to get your test suite to work

Under src/ create androidTest/java/<your-package-name>/test . Note the androidTest. Anything else including instrumentTest will not work.

Add this to build.gradle

sourceSets {
    testLocal {
        java.srcDir file('src/androidTest/java')
        resources.srcDir file('src/androidTest/resources')
    }
}



android{
    sourceSets {
       instrumentTest.setRoot('src/androidTest/')
    }
}

dependencies{
     testLocalCompile 'junit:junit:4.11'
}

task localTest(type: Test, dependsOn: assemble) {
    testClassesDir = sourceSets.testLocal.output.classesDir

    android.sourceSets.main.java.srcDirs.each { dir ->
        def buildDir = dir.getAbsolutePath().split('/')
        buildDir = (buildDir[0..(buildDir.length - 4)] + ['build', 'classes', 'debug']).join('/')

        sourceSets.testLocal.compileClasspath += files(buildDir)
        sourceSets.testLocal.runtimeClasspath += files(buildDir)
    }

    classpath = sourceSets.testLocal.runtimeClasspath
}

check.dependsOn localTest

Add this to the AndroidManifest.xml

 <instrumentation
        android:name="android.test.InstrumentationTestRunner"
        android:label="Tests for my packaged app"
        android:targetPackage="<my-package-name>.test" />

Answer 5

I just renamed the file and the problem fixed.

Answer 6

I was doing some insertions in a db in the @BeforeClass method. I realised I had an object/database mapping problem. This data mapping problem was the cause of this issue for me.