tree 0f375e6f9c339ff0ee4f0eff41a8b2879ccd6faa
parent 5fc7b4d622aa6c873ddc59efd3f2e45eff9b9804
author utzcoz <utzcoz@outlook.com> 1610196485 +0800
committer utzcoz <utzcoz@outlook.com> 1615017700 +0800

Fix BitmapTest.testExtractAlpha with correct assert statement

The new Bitmap generated by Bitmap.extractAlpha uses the alpha value of
origin Bitmap as color value, so we should use total color value to
compare with origin alpha value.

Signed-off-by: utzcoz <utzcoz@outlook.com>