AndroidTestCase 為一Android平台下通用的測試類,它支持所有JUnit的Assert方法和標準的setUp 和tearDown 方法。如果你的測試需要訪問應用的資源或者測試方法依賴於Context,可以使用AndroidTestCase 作為基類。
它的類繼承關係如下圖所示:
Focus2AndroidTest 測試也是Android ApiDemos示例解析(116):Views->Focus->2. Horizontal
但測試的側重點不一樣,Focus2AndroidTest 測試的內容無需啟動Activity,而是測試R.layout.focus_2 的布局(資源)中Focus 的順序是否符合預先設計(可以看作是Activity的一些靜態性能),可以通過FocusFinder的方法來測試Focus的一些靜態屬性,它的代碼如下:
public class Focus2AndroidTest extends AndroidTestCase { private FocusFinder mFocusFinder; private ViewGroup mRoot; private Button mLeftButton; private Button mCenterButton; private Button mRightButton; @Override protected void setUp() throws Exception { super.setUp(); mFocusFinder = FocusFinder.getInstance(); // inflate the layout final Context context = getContext(); final LayoutInflater inflater = LayoutInflater.from(context); mRoot = (ViewGroup) inflater.inflate(R.layout.focus_2, null); // manually measure it, and lay it out mRoot.measure(500, 500); mRoot.layout(0, 0, 500, 500); mLeftButton = (Button) mRoot.findViewById(R.id.leftButton); mCenterButton = (Button) mRoot.findViewById(R.id.centerButton); mRightButton = (Button) mRoot.findViewById(R.id.rightButton); } @SmallTest public void testPreconditions() { assertNotNull(mLeftButton); 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()); } @SmallTest public void testGoingRightFromLeftButtonJumpsOverCenterToRight() { assertEquals("right should be next focus from left", mRightButton, mFocusFinder.findNextFocus(mRoot, mLeftButton, View.FOCUS_RIGHT)); } @SmallTest public void testGoingLeftFromRightButtonGoesToCenter() { assertEquals("center should be next focus from right", mCenterButton, mFocusFinder.findNextFocus(mRoot, mRightButton, View.FOCUS_LEFT)); } }
testGoingRightFromLeftButtonJumpsOverCenterToRight 和 testGoingLeftFromRightButtonGoesToCenter
通過mFocusFinder 的 findNextFocus 來測試 mLeftButton,mRightButton 的下個可以獲取焦點的控制項是否符合事先的設計。