Java Android广播接收器单元测试意图为空

我是Android新手，正在尝试测试braoadcast接收器。 在下面的代码中，意图操作为null，它通过的NullPointerException执行

    @Test
    public void TestAttachTimeoutIntent() {

        String intentAction = Constants.actionPrefix + Constants.actionAttach;
        Context mockContext = mock(Context.class);
        SgsLiteBroadcastReceiver broadcastReceiver = new SgsLiteBroadcastReceiver(null, null);

        Intent attachIntent = new Intent(intentAction);
        attachIntent.putExtra("result", RESULT_SUCCESS);
        attachIntent.putExtra("sequence_number", 3);

        broadcastReceiver.onReceive(mockContext, attachIntent);
        assertNull(broadcastReceiver.getResultData());



        ArgumentCaptor<Intent> argumentIntent = ArgumentCaptor.forClass(Intent.class);
        Mockito.verify(mockContext, Mockito.times(1)).startActivity(argumentIntent.capture());


        Intent receivedIntent = argumentIntent.getValue();
        assertNull(receivedIntent.getAction());
        assertEquals("result", receivedIntent.getStringExtra("result"));
        assertTrue((receivedIntent.getIntExtra("sequence_number", 0) != 0));
    }

@测试
公共无效TestAttachTimeoutinet（）{
字符串intentAction=Constants.actionPrefix+Constants.actionAttach；
Context mockContext=mock（Context.class）；
SgsLiteBroadcastReceiver broadcastReceiver broadcastReceiver broadcastReceiver=new SgsLiteBroadcastReceiver（null，null）；
意向附件=新意向（意向）；
附件。putExtra（“结果”，结果与成功）；
附件putExtra（“序列号”，3）；
onReceive（mockContext，attachinent）；
assertNull（broadcastReceiver.getResultData（））；
ArgumentCaptor argumentIntent=ArgumentCaptor.forClass（Intent.class）；
验证（mockContext，Mockito.times（1））.startActivity（argumentIntent.capture（））；
Intent receivedIntent=argumentIntent.getValue（）；
assertNull（receivedIntent.getAction（））；
assertEquals（“结果”，receivedEvent.getStringExtra（“结果”）；
assertTrue（（receivedEvent.getIntExtra（“序列号”，0）！=0））；
}