使用Espresso测试TextView值不是空的，如果TextView值为空，则测试失败

Question

我是android测试的新手。我试图让测试失败，如果用户点击一个按钮，并且TextView为空。有没有办法在espresso中做到这一点，所以如果TextView为空，它会失败。我不想检查TextView包含特定的文本，我想检查它不是空的。

Answer 1

试试这个：如果TextView中包含的任何文本

import static android.support.test.espresso.Espresso.onView; 
import static android.support.test.espresso.action.ViewActions.click; 
import static android.support.test.espresso.assertion.ViewAssertions.matches; 
import static android.support.test.espresso.matcher.ViewMatchers.isDisplayed; 
import static android.support.test.espresso.matcher.ViewMatchers.withId; 
import static android.support.test.espresso.matcher.ViewMatchers.withText; 
import static org.hamcrest.Matchers.not; 

@RunWith(AndroidJUnit4.class) 
public class MainActivityInstrumentedTest { 

    @Rule 
    public ActivityTestRule<MainActivity> mActivityTestRule = 
      new ActivityTestRule<>(MainActivity.class); 

    @Test 
    public void checkTextView_isDisplayed_and_notEmpty() throws Exception { 
     // perform a click on the button 
     onView(withId(R.id.button)).perform(click()); 

     // passes if the textView does not match the empty string 
     onView(withId(R.id.textView)).check(matches(not(withText("")))); 
    } 
} 

测试将只通过。