public void ContrastPixelNoChange()
{
ProgramImage item = new ProgramImage();
int r = 127;
int res = 0;
int n = 0;
res = item.ContrastPixel(r, n);
Assert.AreEqual(r, res);
}
public void ContrastPixelBelowZero()
{
// changes for over 255
ProgramImage item = new ProgramImage();
int r = 0;
int res = 255;
int n = -255;
res = item.ContrastPixel(r, n);
Assert.AreEqual(r, res);
}
public void ContrastPixelCorrect()
{
// changes for over 255
ProgramImage item = new ProgramImage();
int r = 0;
int res = 2;
int n = -1;
r = item.ContrastPixel(r, n);
Assert.AreEqual(r, res);
}