使用单元测试测试通知

Question

I have a bunch of notification types with conditions which I want to test automatically. My problem is now that I know that it is impossible to generate the notification and to check if the generated UI in the notification center looks like expected.

Because of that I tried to break it down to calling my BroadcastReceiver and intercept that point where I fire the notification. So at that point I can check if the notification contains all settings I expect. I have to hope that it will been rendered as expected :-)

In my build.gradle I added this block:

testOptions {
    unitTests.returnDefaultValues = true
}

Here starts my trouble I create the Intent and call the receiver:

@RunWith(MockitoJUnitRunner.class)
public class NotificationTest {
    @Mock
    Context mMockContext;

    @Test
    public void firstTest() {
        NotificationManager manager = new NotificationManager();
        manager.onReceive(mMockContext, new Intent(NotificationManager.MY_ACTION));
    }
}

This code crashes with a NullPointerException because I have this nice line in my BroadcastReceiver :

switch(intent.getAction()) {

I can imagine what happens here. The mocking API does not create a real Intent and my data are gone. How can I test now my notification implementation? I guess that the PendingIntent s which I want to test next won't work ether.

What can I do now?

Answer 1

My solution is for now to mock the intent as follow:

Intent action = spy(new Intent(NotificationManager.MY_ACTION));
doReturn(NotificationManager.MY_ACTION).when(action).getAction();

However this is just a workaround. Later I run into the issue that the Notification.Builder() class returns just nulls in the builder pattern so this won't fix it at all.