public void TestBlackoutImage_DifferentImage_BlackPixel()
{
// Arrange
var expected = new Bitmap(1, 1);
expected.SetPixel(0, 0, Color.Transparent);
var image1 = new Bitmap(1, 1);
image1.SetPixel(0, 0, Color.White);
var image2 = new Bitmap(1, 1);
image2.SetPixel(0, 0, Color.Black);
var sut = new ImageChangeAnalyser();
// Act
sut.BlackoutImage(image1, out bool b1);
var result = sut.BlackoutImage(image2, out bool b2) as Bitmap;
var pixelColor = result.GetPixel(0, 0);
// Assert
Assert.IsTrue(
Color.Black.A == pixelColor.A &&
Color.Black.R == pixelColor.R &&
Color.Black.G == pixelColor.G &&
Color.Black.B == pixelColor.B
);
}
public void TestBlackoutImage_SameImage_TransparentPixel()
{
// Arrange
var expected = new Bitmap(1, 1);
expected.SetPixel(0, 0, Color.Transparent);
var image = new Bitmap(1, 1);
image.SetPixel(0, 0, Color.Black);
var sut = new ImageChangeAnalyser();
// Act
sut.BlackoutImage(image, out bool b1);
var result = sut.BlackoutImage(image, out bool b2) as Bitmap;
var pixelColor = result.GetPixel(0, 0);
// Assert
Assert.IsTrue(
Color.Transparent.A == pixelColor.A &&
Color.Transparent.R == pixelColor.R &&
Color.Transparent.G == pixelColor.G &&
Color.Transparent.B == pixelColor.B
);
}