Espresso

ImageViewCustomAssersion.java

public static class ImageViewAssert extends AbstractAssert<ImageViewAssert, ImageView> {
    public ImageViewAssert(ImageView actual) {
        super(actual, ImageViewAssert.class);
    }

    public static ImageViewAssert assertThat(ImageView actual) {
        return new ImageViewAssert(actual);
    }

    public ImageViewAssert hasDrawable(Drawable drawable) {
        isNotNull();
        Drawable actualDrawable = actual.getDrawable();

        if (sameBitmap(actualDrawable, drawable)) {
            failWithMessage("error");
        }

        return this;
    }

    public ImageViewAssert hasDrawable(int resId) {
        isNotNull();
        Context context = InstrumentationRegistry.getTargetContext();
        Drawable drawable = ((BitmapDrawable) context.getResources().getDrawable(resId));
        Drawable actualDrawable = actual.getDrawable();

        if (!sameBitmap(actualDrawable, drawable)) {
            failWithMessage("error");
        }

        return this;
    }

    private boolean sameBitmap(Drawable actual, Drawable expected) {
        Bitmap actualBitmap = ((BitmapDrawable) actual).getBitmap();
        Bitmap expectedBitmap = ((BitmapDrawable) expected).getBitmap();

        return actualBitmap.sameAs(expectedBitmap);
    }
}