android - 单元测试广播接收器？

Question

这是我项目中的一个 BroadcastReceiver，我正在对其进行单元测试。当用户调用电话时，它会获取电话号码，并设置启动新 Activity 的 Intent ，并传入电话号码。

public class OutgoingCallReceiver extends BroadcastReceiver 
{
    @Override
    public void onReceive(Context xiContext, Intent xiIntent) 
    {
        if (xiIntent.getAction().equalsIgnoreCase(Intent.ACTION_NEW_OUTGOING_CALL))
        {
            String phoneNum = xiIntent.getStringExtra(Intent.EXTRA_PHONE_NUMBER);

            Intent intent = new Intent(xiContext, MyActivity.class);
            intent.putExtra("phoneNum", phoneNum);
            intent.addFlags(Intent.FLAG_ACTIVITY_NEW_TASK);

            xiContext.startActivity(intent);
            setResultData(null);
        }
    }
}

到目前为止，我的单元测试如下所示:

public class OutgoingCallReceiverTest extends AndroidTestCase
{
    private OutgoingCallReceiver mReceiver;

    @Override
    protected void setUp() throws Exception
    {
        super.setUp();

        mReceiver = new OutgoingCallReceiver();
    }

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

        mReceiver.onReceive(getContext(), intent);        
    }
}

这将贯穿代码，但我希望我的测试能够检查 Intent 是否已发送，并检查其上的电话号码。我该怎么做？

我还可以测试电话是否被取消(因为 setResultData(null) 行)？

Answer 1

corlettk 将我指向 Android 中的 MockContext 对象，这可以解决问题。我已经创建了它的一个子类，TestContext，它看起来像这样:

public class TestContext extends MockContext
{
    private List<Intent> mReceivedIntents = new ArrayList<Intent>();

    @Override
    public String getPackageName()
    {
        return "com.mypackage.test";
    }

    @Override
    public void startActivity(Intent xiIntent)
    {
        mReceivedIntents.add(xiIntent);
    }

    public List<Intent> getReceivedIntents()
    {
        return mReceivedIntents;
    }
}

我的测试用例现在看起来像这样:

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

    @Override
    protected void setUp() throws Exception
    {
        super.setUp();

        mReceiver = new OutgoingCallReceiver();
        mContext = new TestContext();
    }

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

        mReceiver.onReceive(mContext, intent);        
        assertEquals(1, mContext.getReceivedIntents().size());
        assertNull(mReceiver.getResultData());

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