Android Unit Test为Mockito存根方法提供了非模拟消息

Question

I've created the following test method where I mock Settings.Secure and stub the getString method of that class.

@Test
public void testIsDevicePostOwner() throws Exception {
    String mockDeviceId = "2c3977ad-0867-49d6-aad8-c2762f373551";

    Post mockedPost = mock(Post.class);

    Settings.Secure mockedSecure = mock(Settings.Secure.class);

    ContentResolver mockContentResolver = mock(ContentResolver.class);

    when(mockedSecure.getString(mockContentResolver, Settings.Secure.ANDROID_ID)).thenReturn(mockDeviceId);
}

When I run the test I get the following error:

java.lang.RuntimeException: Method getString in android.provider.Settings$Secure not mocked.

Does anybody have any ideas?

Answer 1

Try adding

testOptions {
    unitTests.returnDefaultValues = true
}

in your build.gradle

More info here http://tools.android.com/tech-docs/unit-testing-support

Answer 2

If you want to mock an static method, use PowerMock

You'll need to run with PowerMockRunner and Prepare the class for test:

@PrepareForTest({Settings.Secure.class})

For mocking the object you need to:

PowerMockito.mockStatic(Settings.Secure.class);

Then you could try:

when(Settings.Secure.getString(mockContentResolver, Settings.Secure.ANDROID_ID)).thenReturn(mockDeviceId);

Finally, you could test:

verifyStatic();

Answer 3

Settings.Secure.getString is a static method, so mock(Settings.Secure.class) won't mock it. Even subclassing Settings.Secure and creating your own static getString won't help here.

I'm not sure if there's any reflection magic that can help you out in this case; none comes to mind.