android - 依赖于 Intent 的 Espresso startActivity

Question

我有以下情况。

我的 Activity 有一个依赖于可序列化对象的 fragment 。这是我的 onCreate:

@Override
protected void onCreate(Bundle savedInstanceState) {
    super.onCreate(savedInstanceState);

    MyObject myObj = (MyObj) getIntent().getSerializableExtra("myobj");

    if(myObj != null) {
        FragmentManager manager = getSupportFragmentManager();
        FragmentTransaction transaction = manager.beginTransaction();
        transaction.add(R.id.container, MyFragment.newInstance(myObj));
        transaction.commit();
    }
}

但在我的 Espresso 测试中，我根本无法在创建 Activity 之前将 Intent 传递给 Activity 。我以多种方式尝试了 setActivityIntent，但无法弄清楚如何使其工作。

这是我最后一次尝试:

import android.content.Intent;
import android.support.test.InstrumentationRegistry;
import android.support.test.espresso.Espresso;
import android.test.ActivityInstrumentationTestCase2;
import org.junit.Before;

import static android.support.test.espresso.assertion.ViewAssertions.matches;
import static android.support.test.espresso.matcher.ViewMatchers.withId;
import static android.support.test.espresso.matcher.ViewMatchers.withText;

public class MyActivityTest extends

     ActivityInstrumentationTestCase2<MyActivity> {

        private MyActivity activity;
        private MyObject myObj;

        public MyActivityTest() {
            super(MyActivity.class);
        }

        @Before
        protected void setUp() throws Exception {
            super.setUp();
            injectInstrumentation(InstrumentationRegistry.getInstrumentation());
            myObj = MyObject.mockObject();
            Intent i = new Intent();
            i.putExtra("myobj", myObj);
            setActivityIntent(i);

        }

        public void testName(){
            Espresso.onView(withId(R.id.name)).check(matches(withText(myObj.getObjName())));
        }

    }

我搜索了很多，但没有任何效果。 MyObject 在测试中始终为空。我认为这应该很简单。我错过了什么？

Answer 1

您可以通过这种方式定义要使用的 Intent

@RunWith(AndroidJUnit4.class)
public class MyActivityTestTest {

    private MyObject myObj;

    @Rule
    // third parameter is set to false which means the activity is not started automatically
    public ActivityTestRule<MyActivity> mActivityRule =
        new ActivityTestRule<>(MyActivity.class, false, false);


    @Test
    public void testName() {

          myObj = MyObject.mockObject();
          Intent i = new Intent();
          i.putExtra("myobj", myObj);
          mActivityRule.launchActivity(i);

         //...
    }

}