> Android在线手册 > Android测试教程(14):ActivityInstrumentationTestCase2示例

ActivityInstrumentationTestCase2 用來測試單個的Activity,被測試的Activity可以使用InstrumentationTestCase.launchActivity 來啟動,然後你能夠直接操作被測試的Activity。

ActivityInstrumentationTestCase2 也支持:

  • 可以在UI線程中運行測試方法.
  • 可以注入Intent對象到被測試的Activity中

ActivityInstrumentationTestCase2 取代之前的ActivityInstrumentationTestCase ,新的測試應該使用ActivityInstrumentationTestCase2作為基類。

Android测试教程(14):ActivityInstrumentationTestCase2示例

Focus2ActivityTest 的代碼如下,用於測試Android ApiDemos示例解析(116):Views->Focus->2. Horizontal

public class Focus2ActivityTest
 extends ActivityInstrumentationTestCase2<Focus2> {

 private Button mLeftButton;
 private Button mCenterButton;
 private Button mRightButton;

 public Focus2ActivityTest() {
 super("com.example.android.apis", Focus2.class);
 }

 @Override
 protected void setUp() throws Exception {
 super.setUp();
 final Focus2 a = getActivity();
 mLeftButton = (Button) a.findViewById(R.id.leftButton);
 mCenterButton = (Button) a.findViewById(R.id.centerButton);
 mRightButton = (Button) a.findViewById(R.id.rightButton);
 }


 @MediumTest
 public void testPreconditions() {
 assertTrue("center button should be right of left button",
 mLeftButton.getRight() < mCenterButton.getLeft());
 assertTrue("right button should be right of center button",
 mCenterButton.getRight() < mRightButton.getLeft());
 assertTrue("left button should be focused", mLeftButton.isFocused());
 }

 @MediumTest
 public void testGoingRightFromLeftButtonJumpsOverCenterToRight() {
 sendKeys(KeyEvent.KEYCODE_DPAD_RIGHT);
 assertTrue("right button should be focused", mRightButton.isFocused());
 }

 @MediumTest
 public void testGoingLeftFromRightButtonGoesToCenter()  {

 getActivity().runOnUiThread(new Runnable() {
 public void run() {
 mRightButton.requestFocus();
 }
 });
 // wait for the request to go through
 getInstrumentation().waitForIdleSync();

 assertTrue(mRightButton.isFocused());

 sendKeys(KeyEvent.KEYCODE_DPAD_LEFT);
 assertTrue("center button should be focused",
 mCenterButton.isFocused());
 }
}

setUp 中初始化mLeftButton,mCenterButton和mRightButton,調用每個測試方法之前,setUp 都會被調用。

testPreconditions 通常為第一個測試方法,用來檢測後續的測試環境是否符合條件。

testGoingRightFromLeftButtonJumpsOverCenterToRight 中調用sendKeys 可以模擬按鍵消息。

testGoingLeftFromRightButtonGoesToCenter 中 ,使用runOnUiThread 來為mRightButton 請求focus ,使用runOnUiThread 的原因是因為本測試方法不在UI線程中運行。  getInstrumentation 可以取得Instrumentation對象,有了Instrumentation 對象就可以對Activity進行大部分的操作,waitForIdleSync() 等待application 回到idle 狀態,之後就可以檢測mRightButton 是否獲得了焦點。