@Override
            public boolean matchesSafely(EditText view) {
                final CharSequence hint = view.getHint();
                return hint != null && stringMatcher.matches(hint.toString());
            }
A custom matcher that checks the hint property of an {@link EditText}. It
accepts either a {@link String} or a {@link Matcher}.
ui/espresso/CustomMatcherSample/app/src/sharedTest/java/com/example/android/testing/espresso/CustomMatcherSample/HintMatcher.java