public void ConvertToGray_When_Passed_An_Image_Returns_An_Image_Where_The_First_And_Last_Pixels_Have_The_Calculated_Grey_Value_For_The_Red_Blue_And_Green_Components()
{
//Arrange
Bitmap originalImage = new Bitmap(@"C:\Users\Public\test_224_299_Image.bmp");
Color oldImageFirstPixel = originalImage.GetPixel(0, 0);
int grayOldImageFirstPixel = (byte)(.299 * oldImageFirstPixel.R + .587 * oldImageFirstPixel.G + .114 * oldImageFirstPixel.B);
Color oldImageLastPixel = originalImage.GetPixel(298, 223);
int grayoldImageLastPixel = (byte)(.299 * oldImageLastPixel.R + .587 * oldImageLastPixel.G + .114 * oldImageLastPixel.B);
//Act
Processing.ConvertToGrey(originalImage);
Color newImageFirstPixel = originalImage.GetPixel(0, 0);
Color newImageLastPixel = originalImage.GetPixel(298, 223);
Color newImageTopLeftPixel = originalImage.GetPixel(0, 0);
int newImageWidth = originalImage.Width;
int newImageHeight = originalImage.Height;
//Assert
//First Pixel is greyed
Assert.AreEqual(grayOldImageFirstPixel, newImageFirstPixel.R);
Assert.AreEqual(grayOldImageFirstPixel, newImageFirstPixel.G);
Assert.AreEqual(grayOldImageFirstPixel, newImageFirstPixel.B);
//Last Pixel is greyed
Assert.AreEqual(grayoldImageLastPixel, newImageLastPixel.R);
Assert.AreEqual(grayoldImageLastPixel, newImageLastPixel.G);
Assert.AreEqual(grayoldImageLastPixel, newImageLastPixel.B);
}
