public void GivenABlockOfColouredPixels_AndPixelPositionInBlockGiven__WhenFloodCalledWithPixelPos_ThenAdjacentPixelsAreReturned()
{
_colourGridService = new GridService(4, _startIndexPosition);
var expectedColour = "red";
var expectedNewFloodColour = "white";
var start = 1;
var end = 2;
_colourGridService.FillRow(expectedColour, 1, start, end);
_colourGridService.FillRow(expectedColour, 2, start, end);
_colourGridService.FloodBlockWithColour(expectedNewFloodColour, new PixelPosition {
X = 1, Y = 1
});
Assert.That(_colourGridService.GetPixelColour(new PixelPosition {
X = 2, Y = 1
}), Is.EqualTo(expectedNewFloodColour));
Assert.That(_colourGridService.GetPixelColour(new PixelPosition {
X = 1, Y = 1
}), Is.EqualTo(expectedNewFloodColour));
Assert.That(_colourGridService.GetPixelColour(new PixelPosition {
X = 1, Y = 2
}), Is.EqualTo(expectedNewFloodColour));
Assert.That(_colourGridService.GetPixelColour(new PixelPosition {
X = 2, Y = 2
}), Is.EqualTo(expectedNewFloodColour));
}
public void GivenABlockOfColouredPixels_AndPixelPositionIsInValid__WhenFloodCalledWithPixelPos_ThenExceptionThrown()
{
_colourGridService = new GridService(4, _startIndexPosition);
var expectedColour = "red";
var expectedNewFloodColour = "white";
_colourGridService.FillRow(expectedColour, 1, 1, 2);
_colourGridService.FillRow(expectedColour, 2, 1, 2);
Assert.Throws <ApplicationException>(() => _colourGridService.FloodBlockWithColour(expectedNewFloodColour, new PixelPosition {
X = 9, Y = 9
}));
}
