問題描述
我對 Android 上的 Espresso 很陌生，我遇到了以下問題:我希望 Espresso 在按鈕上執行長按(或其他操作)，并且在按住按鈕的同時，我想檢查不同視圖的狀態.
I'm quite new to Espresso on Android and I am running into the following problem: I want Espresso to perform a longclick(or something..) on a button, and while the button is kept pressed down, I want to check the state of a different View.
在(或多或少)偽代碼中:
In (more or less) pseudocode:
onView(withId(button_id)).perform(pressButtonDown());
onView(withId(textBox_id)).check(matches(withText("Button is pressed")));
onView(withId(button_id)).perform(releaseButton());
我嘗試使用 MotionEvents.sendDown() 和 .sendUp() 編寫 2 個自定義 Taps，PRESS 和 RELEASE，但沒有成功.如果這是正確的路徑，我可以發布到目前為止的代碼.
I tried writing 2 custom Taps, PRESS and RELEASE, with MotionEvents.sendDown() and .sendUp(), but did not get it to work. If this is the right path, I can post the code I've got so far.
public class PressViewActions
{
public static ViewAction pressDown(){
return new GeneralClickAction(HoldTap.DOWN, GeneralLocation.CENTER, Press.THUMB);
}
public static ViewAction release() {
return new GeneralClickAction(HoldTap.UP, GeneralLocation.CENTER, Press.THUMB);
}
}
以及 Tappers 的代碼:
And the code for the Tappers:
public enum HoldTap implements Tapper {
DOWN {
@Override
public Tapper.Status sendTap(UiController uiController, float[] coordinates, float[] precision)
{
checkNotNull(uiController);
checkNotNull(coordinates);
checkNotNull(precision);
DownResultHolder res = MotionEvents.sendDown(uiController, coordinates, precision);
ResultHolder.setController(uiController);
ResultHolder.setResult(res);
return Status.SUCCESS;
}
},
UP{
@Override
public Tapper.Status sendTap(UiController uiController, float[] coordinates, float[] precision)
{
DownResultHolder res = ResultHolder.getResult();
UiController controller = ResultHolder.getController();
try {
if(!MotionEvents.sendUp(controller, res.down))
{
MotionEvents.sendCancel(controller, res.down);
return Status.FAILURE;
}
}
finally {
//res.down.recycle();
}
return Status.SUCCESS;
}
}
}
我得到的錯誤如下:
android.support.test.espresso.PerformException: Error performing 'up click' on view 'with id: de.test.app:id/key_ptt'.
...
...
Caused by: java.lang.RuntimeException: Couldn't click at: 281.5,1117.5 precision: 25.0, 25.0 . Tapper: UP coordinate provider: CENTER precision describer: THUMB. Tried 3 times. With Rollback? false
我希望，這會有所幫助.
I hope, this helps.
我們將不勝感激任何幫助和想法！
Any help and ideas will be appreciated!
提前坦克很多！
推薦答案
Android 中的點擊由兩個事件組成，一個向下事件和一個向上/取消事件.如果您想將這兩者分開，則不能進行點擊"，因為它們已經包含了兩者.
A tap in Android is made up of two events, a down event and a up/cancel event. If you want to have these two as separate you cannot make "taps" as they already encompass both.
也就是說，你的想法行得通，你只需要使用一個較低級別的 api，即 UiController 以及 MotionEvents 中的輔助方法.但請注意:由于釋放"視圖需要首先持有它，如果您不進行適當的清理，您的測試將相互依賴.
That said, your idea works, you just need to use a lower-level api, namely UiController along with the helper methods in MotionEvents. Be warned though: since "releasing" a view requires first holding on it, your tests will be dependent on each other if you don't do proper clean up.
示例:在一個測試中，您按下一個視圖，您的測試失敗，然后在另一個測試中您在一個您未單擊的視圖上發布:您的第二個測試會通過，而它不應該通過.
Example: in a test you press a View, your test fails, then in another test you release on a view you didn't click: your second test would pass while it shouldn't have.
我在 我的 github 上上傳了一個完整的示例.這里是關鍵點.首先是測試代碼:
I uploaded on my github a complete sample. Here the keypoints. First the test code:
@Before
public void setUp() throws Exception {
super.setUp();
injectInstrumentation(InstrumentationRegistry.getInstrumentation());
getActivity();
}
@After
public void tearDown() throws Exception {
super.tearDown();
LowLevelActions.tearDown();
}
@Test
public void testAssertWhilePressed() {
onView(withId(R.id.button)).perform(pressAndHold());
onView(withId(R.id.text)).check(matches(withText("Button is held down")));
onView(withId(R.id.button)).perform(release());
}
然后是 LowLevelActions:
Then LowLevelActions:
public class LowLevelActions {
static MotionEvent sMotionEventDownHeldView = null;
public static PressAndHoldAction pressAndHold() {
return new PressAndHoldAction();
}
public static ReleaseAction release() {
return new ReleaseAction();
}
public static void tearDown() {
sMotionEventDownHeldView = null;
}
static class PressAndHoldAction implements ViewAction {
@Override
public Matcher<View> getConstraints() {
return isDisplayingAtLeast(90); // Like GeneralClickAction
}
@Override
public String getDescription() {
return "Press and hold action";
}
@Override
public void perform(final UiController uiController, final View view) {
if (sMotionEventDownHeldView != null) {
throw new AssertionError("Only one view can be held at a time");
}
float[] precision = Press.FINGER.describePrecision();
float[] coords = GeneralLocation.CENTER.calculateCoordinates(view);
sMotionEventDownHeldView = MotionEvents.sendDown(uiController, coords, precision).down;
// TODO: save view information and make sure release() is on same view
}
}
static class ReleaseAction implements ViewAction {
@Override
public Matcher<View> getConstraints() {
return isDisplayingAtLeast(90); // Like GeneralClickAction
}
@Override
public String getDescription() {
return "Release action";
}
@Override
public void perform(final UiController uiController, final View view) {
if (sMotionEventDownHeldView == null) {
throw new AssertionError("Before calling release(), you must call pressAndHold() on a view");
}
float[] coords = GeneralLocation.CENTER.calculateCoordinates(view);
MotionEvents.sendUp(uiController, sMotionEventDownHeldView, coords);
}
}
}
這篇關于Android Espresso:按住按鈕時進行斷言的文章就介紹到這了，希望我們推薦的答案對大家有所幫助，也希望大家多多支持html5模板網！