withdrawable-3.kt

fun withDrawable(@DrawableRes id: Int, @ColorRes tint: Int? = null, tintMode: PorterDuff.Mode = SRC_IN) = object : TypeSafeMatcher<View>() {
    override fun describeTo(description: Description) {
        description.appendText("ImageView with drawable same as drawable with id $id")
        tint?.let { description.appendText(", tint color id: $tint, mode: $tintMode") }
    }

    override fun matchesSafely(view: View): Boolean {
        val context = view.context
        val tintColor = tint?.toColor(context)
        val expectedBitmap = context.getDrawable(id).tinted(tintColor, tintMode).toBitmap()

        return view is ImageView && view.drawable.toBitmap().sameAs(expectedBitmap)
    }
}