Unit testing a broadcast receiver?

Question

Here\'s a BroadcastReceiver from my project, which I\'m looking to unit test. When the user makes a phone call, it grabs the phone number, and sets up an intent to start a new

Answer 1

Since this question was asked mocking Frameworks have evolved pretty much. With mockito you can now mock not only interfaces but as well classes. So I would suggest to solve this problem by mocking a context and using ArgumentCapture:

import static org.mockito.Mockito.*;

public class OutgoingCallReceiverTest extends AndroidTestCase {
    private OutgoingCallReceiver mReceiver;
    private Context mContext;

    @Override
    protected void setUp() throws Exception {
        super.setUp();
        //To make mockito work
        System.setProperty("dexmaker.dexcache", 
                mContext.getCacheDir().toString());

        mReceiver = new OutgoingCallReceiver();
        mContext = mock(Context.class);
    }

    public void testStartActivity() {
        Intent intent = new Intent(Intent.ACTION_NEW_OUTGOING_CALL);
        intent.putExtra(Intent.EXTRA_PHONE_NUMBER, "01234567890");

        mReceiver.onReceive(mContext, intent);
        assertNull(mReceiver.getResultData());

        ArgumentCaptor argument = ArgumentCaptor.forClass(Intent.class);
        verify(mContext, times(1)).startActivity(argument.capture());

        Intent receivedIntent = argument.getValue();         
        assertNull(receivedIntent.getAction());
        assertEquals("01234567890", receivedIntent.getStringExtra("phoneNum"));
        assertTrue((receivedIntent.getFlags() & Intent.FLAG_ACTIVITY_NEW_TASK) != 0);
    }
}