BaseActivityTest

BaseActivityTest.java

/**
 * Base class for all Espresso tests
 */
public abstract class BaseActivityTest {
    protected boolean doesViewExist(@IdRes int id) {
        try {
            onView(withId(id)).check(matches(isDisplayed()));
            return true;
        } catch (AssertionFailedError er){
            return false;
        }catch (Exception e){
            return false;
        }
    }

    /**
     * Perform action of waiting for a specific time.
     */
    protected static ViewAction waitFor(final long millis) {
        return new ViewAction() {
            @Override
            public Matcher<View> getConstraints() {
                return isRoot();
            }

            @Override
            public String getDescription() {
                return "Wait for " + millis + " milliseconds.";
            }

            @Override
            public void perform(UiController uiController, View view) {
                uiController.loopMainThreadForAtLeast(millis);
            }
        };
    }

    protected static Matcher<View> childAtPosition(
            final Matcher<View> parentMatcher, final int position) {

        return new TypeSafeMatcher<View>() {
            @Override
            public void describeTo(Description description) {
                description.appendText("Child at position " + position + " in parent ");
                parentMatcher.describeTo(description);
            }

            @Override
            public boolean matchesSafely(View view) {
                ViewParent parent = view.getParent();
                return (parent instanceof ViewGroup) && parentMatcher.matches(parent)
                        && view.equals(((ViewGroup) parent).getChildAt(position));
            }
        };
    }
}