HasImageSet.kt

fun hasImageSet(): BoundedMatcher<View, ImageView> {
            return object : BoundedMatcher<View, ImageView>(ImageView::class.java) {
                override fun describeTo(description: Description) {
                    description.appendText("has image set.")
                }

                override fun matchesSafely(imageView: ImageView): Boolean {
                    return imageView.background != null
                }
            }
        }