android中junit测试各种旋钮事件

public class CalculatorHitSomeButtons extends ActivityInstrumentationTestCase <Calculator>{    public boolean setup = false;    private static final String TAG = "CalculatorTests";    Calculator mActivity = null;    Instrumentation mInst = null;        public CalculatorHitSomeButtons() {        super("com.android.calculator2", Calculator.class);    }        @Override    protected void setUp() throws Exception {        super.setUp();                mActivity = getActivity();        mInst = getInstrumentation();    }        @Override    protected void tearDown() throws Exception {        super.tearDown();    }        @LargeTest    public void testPressSomeKeys() {        Log.v(TAG, "Pressing some keys!");                // Make sure that we clear the output        press(KeyEvent.KEYCODE_ENTER);        press(KeyEvent.KEYCODE_CLEAR);                // 3 + 4 * 5 => 23        press(KeyEvent.KEYCODE_3);        press(KeyEvent.KEYCODE_PLUS);        press(KeyEvent.KEYCODE_4);        press(KeyEvent.KEYCODE_9 | KeyEvent.META_SHIFT_ON);        press(KeyEvent.KEYCODE_5);        press(KeyEvent.KEYCODE_ENTER);                assertEquals(displayVal(), "23");    }        @LargeTest    public void testTapSomeButtons() {        Log.v(TAG, "Tapping some buttons!");                // Make sure that we clear the output        tap(R.id.equal);        tap(R.id.del);                // 567 / 3 => 189        tap(R.id.digit5);        tap(R.id.digit6);        tap(R.id.digit7);        tap(R.id.div);        tap(R.id.digit3);        tap(R.id.equal);                assertEquals(displayVal(), "189");                // make sure we can continue calculations also        // 189 - 789 => -600        tap(R.id.minus);        tap(R.id.digit7);        tap(R.id.digit8);        tap(R.id.digit9);        tap(R.id.equal);                // Careful: the first digit in the expected value is \u2212, not "-" (a hyphen)        assertEquals(displayVal(), mActivity.getString(R.string.minus) + "600");    }      // helper functions    private void press(int keycode) {        mInst.sendKeyDownUpSync(keycode);    }        private boolean tap(int id) {        View view = mActivity.findViewById(id);        if(view != null) {            TouchUtils.clickView(this, view);            return true;        }        return false;    }      private String displayVal() {        CalculatorDisplay display = (CalculatorDisplay) mActivity.findViewById(R.id.display);        assertNotNull(display);                EditText box = (EditText) display.getCurrentView();        assertNotNull(box);                return box.getText().toString();    }}