Android InstrumentationTest Espresso matcher for Drawable's

DrawableMatcher.java

/**
 * Apache 2.0
 *
 * @see <a href="https://github.com/stablekernel/EspressoLib/blob/master/src/main/java/com/stablekernel/espressolib/DrawableMatcher.java">Source1</a>
 * @see <a href="http://stackoverflow.com/questions/33696488/getting-bitmap-from-vector-drawable">Source2</a>
 */
@SuppressWarnings("SimplifiableIfStatement")
public class DrawableMatcher extends TypeSafeMatcher<View> {

    private final int expectedResourceId;

    public DrawableMatcher(@DrawableRes int expectedResourceId) {
        super(View.class);
        this.expectedResourceId = expectedResourceId;
    }

    @Override
    protected boolean matchesSafely(View item) {
        if (!(item instanceof ImageView)) return false;

        ImageView imageView = (ImageView) item;
        if (expectedResourceId == 0) return imageView.getDrawable() == null;

        Drawable expectedDrawable = ContextCompat.getDrawable(item.getContext(), expectedResourceId);
        if (expectedDrawable == null) return false;

        Drawable actualDrawable = imageView.getDrawable();

        if (expectedDrawable instanceof VectorDrawable) {
            if (!(actualDrawable instanceof VectorDrawable)) return false;
            return vectorToBitmap((VectorDrawable) expectedDrawable).sameAs(vectorToBitmap((VectorDrawable) actualDrawable));
        }

        if (expectedDrawable instanceof BitmapDrawable) {
            if (!(actualDrawable instanceof BitmapDrawable)) return false;
            return ((BitmapDrawable) expectedDrawable).getBitmap().sameAs(((BitmapDrawable) actualDrawable).getBitmap());
        }

        throw new IllegalArgumentException("Unsupported drawable: " + imageView.getDrawable());
    }

    private static Bitmap vectorToBitmap(VectorDrawable vectorDrawable) {
        Bitmap bitmap = Bitmap.createBitmap(vectorDrawable.getIntrinsicWidth(), vectorDrawable.getIntrinsicHeight(), Bitmap.Config.ARGB_8888);
        Canvas canvas = new Canvas(bitmap);
        vectorDrawable.setBounds(0, 0, canvas.getWidth(), canvas.getHeight());
        vectorDrawable.draw(canvas);
        return bitmap;
    }

    @Override
    public void describeTo(Description description) {
        description.appendText("with drawable id: ").appendValue(expectedResourceId);
    }
}

line 22: if (expectedResourceId < 0) should be if (expectedResourceId == 0).
Resources may have negative ids.

line 22: if (expectedResourceId < 0) should be if (expectedResourceId == 0).
Resources may have negative ids.

Thanks