android - 进度条和 Espresso

Question

当我在运行一些 espresso 测试时显示的布局中有一个 ProgressBar - 然后我遇到:

Caused by: android.support.test.espresso.AppNotIdleException: Looped for 1670 iterations over 60 SECONDS. The following Idle Conditions failed .

有什么好的方法可以解决这个问题？发现了一些骇人听闻的东西，但正在寻找一种好方法

Answer 1

如果在测试开始时 ProgressBar 不可见，则 Drawable 可以替换为自定义 ViewAction:

// Replace the drawable with a static color
onView(isAssignableFrom(ProgressBar.class)).perform(replaceProgressBarDrawable());

// Click a button (that will make the ProgressBar visible)
onView(withText("Show ProgressBar").perform(click());

自定义ViewAction:

public static ViewAction replaceProgressBarDrawable() {
    return actionWithAssertions(new ViewAction() {
        @Override
        public Matcher<View> getConstraints() {
            return isAssignableFrom(ProgressBar.class);
        }

        @Override
        public String getDescription() {
            return "replace the ProgressBar drawable";
        }

        @Override
        public void perform(final UiController uiController, final View view) {
            // Replace the indeterminate drawable with a static red ColorDrawable
            ProgressBar progressBar = (ProgressBar) view;
            progressBar.setIndeterminateDrawable(new ColorDrawable(0xffff0000));
            uiController.loopMainThreadUntilIdle();
        }
    });
}