XML文件

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MainActivity代码

1 package cn.edu.niit.testforgit; 2  3 import android.support.v7.app.AppCompatActivity; 4 import android.os.Bundle; 5 import android.view.View; 6 import android.widget.Button; 7 import android.widget.EditText; 8 import android.widget.TextView; 9 10 public class MainActivity extends AppCompatActivity implements View.OnClickListener {11 12     private TextView textView;13     private EditText editText;14     private Button button;15 16     @Override17     protected void onCreate(Bundle savedInstanceState) {18         super.onCreate(savedInstanceState);19         setContentView(R.layout.activity_main);20         sayHello();21     }22 23     public void sayHello() {24         textView = (TextView) findViewById(R.id.textView);25         editText = (EditText) findViewById(R.id.editText);26         button = (Button) findViewById(R.id.button);27         button.setOnClickListener(this);28     }29 30     @Override31     public void onClick(View v) {32         switch (v.getId()) {33             case R.id.button:34                 textView.setText("Hello," + editText.getText().toString() + "!");35                 editText.setText("");36                 break;37         }38     }39 }

MainActivity测试代码MainActivityInstrumentationTest代码

1 package cn.edu.niit.testforgit; 2  3 import android.support.test.filters.LargeTest; 4 import android.support.test.rule.ActivityTestRule; 5 import android.support.test.runner.AndroidJUnit4; 6  7 import org.junit.Rule; 8 import org.junit.Test; 9 import org.junit.runner.RunWith;10 11 import static android.support.test.espresso.Espresso.onView;12 import static android.support.test.espresso.action.ViewActions.click;13 import static android.support.test.espresso.action.ViewActions.closeSoftKeyboard;14 import static android.support.test.espresso.action.ViewActions.typeText;15 import static android.support.test.espresso.assertion.ViewAssertions.matches;16 import static android.support.test.espresso.matcher.ViewMatchers.withId;17 import static android.support.test.espresso.matcher.ViewMatchers.withText;18 19 20 /**21  * Created by Wang Yifan on 2017/03/15.22  */23 24 @RunWith(AndroidJUnit4.class)25 @LargeTest26 public class MainActivityInstrumentationTest {27     private static final String STRING_TO_BE_TYPED = "Peter";28     @Rule29     public ActivityTestRule
     
       mActivityRule = new ActivityTestRule<>(30             MainActivity.class);31 32     @Test33     public void sayHello() {34         onView(withId(R.id.editText)).perform(typeText(STRING_TO_BE_TYPED), closeSoftKeyboard());35         onView(withText("Say hello!")).perform(click());36         String expectedText = "Hello," + STRING_TO_BE_TYPED + "!";37         onView(withId(R.id.textView)).check(matches(withText(expectedText)));38     }39 }
     

测试结果