public void BlackWhiteFilter()
{
//Get a real image to test the method instead of using a new empty bitmap !
Bitmap bitmap = Resources.No_filter;
Bitmap resultInterf = null;
BusinessLayer business = new BusinessLayer(imageInterface, filterInterface, edgeDetectionInterface);
filterInterface.blackWhiteFilter(bitmap).Returns<Bitmap>(resultInterf);
business.applyBlackWhiteFilter(bitmap);
Assert.AreEqual(business.getFilteredBitmap(), resultInterf);
}
//Method to apply the Black & White filter
public Bitmap applyBlackWhiteFilter(Bitmap sourceBitmap)
{
filteredBitmap = filtersInterface.blackWhiteFilter(sourceBitmap);
return(filteredBitmap);
}