public void ColourComponent_InvalidPoint()
{
int correctanswer = -1;
ProgramImage item = new ProgramImage();
Bitmap map = new Bitmap(1, 1);
map.SetPixel(0, 0, Color.FromArgb(255, 255, 255));
int x1 = -1;
int y1 = 0;
int x2 = -1;
int y2 = -1;
int x3 = 0;
int y3 = -1;
int x4 = -1;
int y4 = -1;
int x5 = 1;
int y5 = 0;
int x6 = 1;
int y6 = 1;
int x7 = 0;
int y7 = 1;
int x8 = 1;
int y8 = 1;
Assert.AreEqual(item.ColourComponent(map, x1, y1), correctanswer);
Assert.AreEqual(item.ColourComponent(map, x2, y2), correctanswer);
Assert.AreEqual(item.ColourComponent(map, x3, y3), correctanswer);
Assert.AreEqual(item.ColourComponent(map, x4, y4), correctanswer);
Assert.AreEqual(item.ColourComponent(map, x5, y5), correctanswer);
Assert.AreEqual(item.ColourComponent(map, x6, y6), correctanswer);
Assert.AreEqual(item.ColourComponent(map, x7, y7), correctanswer);
Assert.AreEqual(item.ColourComponent(map, x8, y8), correctanswer);
}
public void ColourComponent_CorrectWork()
{
int correctanswer = 255;
ProgramImage item = new ProgramImage();
Bitmap map = new Bitmap(1, 1);
map.SetPixel(0, 0, Color.FromArgb(255, 255, 255));
int x = 0;
int y = 0;
Assert.AreEqual(item.ColourComponent(map, x, y), correctanswer);
}