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Espresso & Brioche
public class CustomMatchers {
public static Matcher<View> withBackground(final int resourceId) {
return new TypeSafeMatcher<View>() {
@Override
public boolean matchesSafely(View view) {
return sameBitmap(view.getContext(), view.getBackground(), resourceId);
}
@Override
public void describeTo(Description description) {
description.appendText("has background resource " + resourceId);
}
};
}
public static Matcher<View> withCompoundDrawable(final int resourceId) {
return new BoundedMatcher<View, TextView>(TextView.class) {
@Override
public void describeTo(Description description) {
description.appendText("has compound drawable resource " + resourceId);
}
@Override
public boolean matchesSafely(TextView textView) {
for (Drawable drawable : textView.getCompoundDrawables()) {
if (sameBitmap(textView.getContext(), drawable, resourceId)) {
return true;
}
}
return false;
}
};
}
public static Matcher<View> withImageDrawable(final int resourceId) {
return new BoundedMatcher<View, ImageView>(ImageView.class) {
@Override
public void describeTo(Description description) {
description.appendText("has image drawable resource " + resourceId);
}
@Override
public boolean matchesSafely(ImageView imageView) {
return sameBitmap(imageView.getContext(), imageView.getDrawable(), resourceId);
}
};
}
private static boolean sameBitmap(Context context, Drawable drawable, int resourceId) {
Drawable otherDrawable = context.getResources().getDrawable(resourceId);
if (drawable == null || otherDrawable == null) {
return false;
}
if (drawable instanceof StateListDrawable && otherDrawable instanceof StateListDrawable) {
drawable = drawable.getCurrent();
otherDrawable = otherDrawable.getCurrent();
}
if (drawable instanceof BitmapDrawable) {
Bitmap bitmap = ((BitmapDrawable) drawable).getBitmap();
Bitmap otherBitmap = ((BitmapDrawable) otherDrawable).getBitmap();
return bitmap.sameAs(otherBitmap);
}
return false;
}
}
public class EspressoTest extends ActivityInstrumentationTestCase2<ShoppingActivity> {
@Override
public void setUp() throws Exception {
super.setUp();
setupInjections();
setupPreferences();
getActivity();
}
public void test_the_background_is_visible() throws Exception {
onView(withImageDrawable(R.drawable.some_background)).check(matches(isDisplayed()));
}
public void test_the_card_has_a_specific_image() throws Exception {
onView(withId(R.id.some_card)).check(matches(withImageDrawable(R.drawable.my_card));
}
public void test_this_textview_is_reused_so_we_have_to_manually_look_for_it() throws Exception {
onView(allOf(withId(R.id.some_card), withParent(withId(R.id.textview_parent_left)))).check(matches(withCompoundDrawable(R.drawable.left_drawable));
}
}
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