public void FillAdjacentCells_FillsOnlyTheSpecifiedRow()
{
// Arrange
PixelPainter pixelPainter = new PixelPainter(9, 9);
Point firstPixel = new Point(2, 3);
Point endPixel = new Point(6, 3);
// Act
pixelPainter.FillAdjacentCells(firstPixel, endPixel, Color.Red);
var numberOfUnaffectedPixels = pixelPainter.Grid.Values.Where(x => x.IsEmpty).Count();
var numberOfAffectedPixels = pixelPainter.Grid.Values.Where(x => x == Color.Red).Count();
// Assert
Assert.AreEqual(5, numberOfAffectedPixels);
Assert.AreEqual(76, numberOfUnaffectedPixels);
}
