Use Espresso as a testing tool

   There are three separate episodes of Espresso on Youtube to explain Espresso as an integrated Unit Test, Instrument Test, end-to-end test, etc. I tried it out and it feels pretty good.

   Official website address: https://google.github.io/android-testing-support-library/docs/index.html

   GitHub    : https://github.com/googlesamples/android-testing/tree/master/ui/espresso

Add test case code to an existing project

   1. Introduce dependency packages (23.1.1 will be required to use 2.2.2, and ERROR will be exposed here, so 2.2.1 will not be dropped)

    androidTestCompile 'com.android.support.test.espresso:espresso-core:2.2.1'
    androidTestCompile 'com.android.support.test:runner:0.4.1'
    androidTestCompile 'com.android.support.test:rules:0.4.1'

2. Set the build configuration

testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

3. For the test of the login page, there are three test cases, the test user name cannot be empty, the test password cannot be empty, and the user name and password are entered to test the correctness

/**
 * Login test
 */
@RunWith(AndroidJUnit4.class)
@LargeTest
public class LoginFragmentText {

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

    private MainActivity mainActivity;

    //There is a main Fragment after entering here, there are 4 buttons below, click one of them to enter the login page
    @Before
    public void switchToLogin () {
        LogUtils.debug("switchToLogin...");
        onView(withId(R.id.btnProfileID)).perform(click());

        mainActivity = mActivityRule.getActivity ();
    }

    //The prompts are all Toast pop-up prompts (the same below)
    @Test
    public void testUsernameNotEmpty() {
        onView(withId(R.id.login_login_btn)).perform(click());
        
        onView(withText("Username cannot be empty")).inRoot(withDecorView(not(mainActivity.getWindow().getDecorView()))).check(matches(isDisplayed()));
    }

    @Test
    public void testPasswordNotEmpty() {

        //Inject username
        onView(withId(R.id.login_username)).perform(click(), clearText(), typeText("1234567"), closeSoftKeyboard());

        //click the login button
        onView(withId(R.id.login_login_btn)).perform(click());
        // popup prompt
        onView(withText("Password cannot be empty")).inRoot(withDecorView(not(mainActivity.getWindow().getDecorView()))).check(matches(isDisplayed()));
    }

    @Test
    public void testLogin () {
        //Inject username
        onView(withId(R.id.login_username)).perform(typeText("1234567"), closeSoftKeyboard());
        //Inject password
        onView(withId(R.id.login_password)).perform(typeText("123456"), closeSoftKeyboard());
        //click the login button
        onView(withId(R.id.login_login_btn)).perform(click());
        //The pop-up window prompts that the login is successful
        onView(withText("登录成功")).inRoot(withDecorView(not(mainActivity.getWindow().getDecorView()))).check(matches(isDisplayed()));
    }
}

When testing, especially the EditText input box is easily affected by the input method installed on the mobile phone, and the input may not be entered. At this time, you can use Thread.sleep (XXXX) to pause the capture screen, which is much easier to use than the previous Selenium. span

Use Espresso as a testing tool

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