public void GenerateShapes_CorrectCountOfIsoscelesRightTriangles_WhenGridIsSquare(int nonHypotenuseSideLengthInPixels, int maxX, int maxY)
{
if (maxX != maxY || maxY <= 0 || maxY <= 0 || maxX < nonHypotenuseSideLengthInPixels ||
maxY < nonHypotenuseSideLengthInPixels)
{
throw new NotSupportedException(
"Assertions will only work when the grid is a perfect square of at least 1x1 size");
}
//arrange
var properties = new IsoscelesTriangleCreatorStrategyProperties
{
NonHypotenuseSideLengthInPixels = nonHypotenuseSideLengthInPixels,
GridMaxXCoordinateInPixels = maxX,
GridMaxYCoordinateInPixels = maxY
};
var strategy = new IsoscelesTriangleCreatorStrategy(properties);
//act
List <Shape> shapes = strategy.GenerateShapes();
int expectedTriangleCount =
(maxX / nonHypotenuseSideLengthInPixels) * (maxY / nonHypotenuseSideLengthInPixels) * 2;
//assert
shapes.Count.Should().Be(expectedTriangleCount,
$"A grid of {maxX}x{maxY} should be populated with {expectedTriangleCount} isosceles right triangles with non-hypotenuse side length of {properties.NonHypotenuseSideLengthInPixels}");
}
/// <summary>
/// Configured desired shapes in the cartesian plane
/// </summary>
/// <returns></returns>
private CartesianPlane CreateNewCartesianPlaneOn60X60GridWithIsoscelesRightTriangles()
{
int maxX = 60;
int maxY = 60;
int nonHypotenuseSideLengthInPixels = 10;
var strategyProperties = new IsoscelesTriangleCreatorStrategyProperties();
strategyProperties.NonHypotenuseSideLengthInPixels = nonHypotenuseSideLengthInPixels;
strategyProperties.GridMaxXCoordinateInPixels = maxX;
strategyProperties.GridMaxYCoordinateInPixels = maxY;
strategyProperties.IncreaseCountOn = IsoscelesTriangleCreatorStrategyProperties.IncreaseCountOns
.IncreaseCountOnRightTriangle;
strategyProperties.TriangleHypotenusePosition = IsoscelesTriangleCreatorStrategyProperties
.TriangleHypotenusePositions.BackslashHypotenuse;
strategyProperties.StartRowOption =
IsoscelesTriangleCreatorStrategyProperties.StartRowOptions.StartRowAtMaxY;
var strategy = new IsoscelesTriangleCreatorStrategy(strategyProperties);
var plane = new CartesianPlane(maxX, maxY);
plane.AddShapes(strategy.GenerateShapes());
return(plane);
}
private List <Coordinate> GetExpectedShapeA1For1x1Grid(IsoscelesTriangleCreatorStrategyProperties properties)
{
List <Coordinate> expectedCoordinates = new List <Coordinate>();
if (properties.IncreaseCountOn == IsoscelesTriangleCreatorStrategyProperties.IncreaseCountOns.IncreaseCountOnLeftTriangle)
{
if (properties.TriangleHypotenusePosition == IsoscelesTriangleCreatorStrategyProperties.TriangleHypotenusePositions.BackslashHypotenuse)
{
expectedCoordinates.Add(new Coordinate(0, 1));
expectedCoordinates.Add(new Coordinate(1, 0));
expectedCoordinates.Add(new Coordinate(1, 1));
}
else
{
expectedCoordinates.Add(new Coordinate(0, 0));
expectedCoordinates.Add(new Coordinate(1, 0));
expectedCoordinates.Add(new Coordinate(1, 1));
}
}
else
{
if (properties.TriangleHypotenusePosition == IsoscelesTriangleCreatorStrategyProperties.TriangleHypotenusePositions.BackslashHypotenuse)
{
expectedCoordinates.Add(new Coordinate(0, 0));
expectedCoordinates.Add(new Coordinate(0, 1));
expectedCoordinates.Add(new Coordinate(1, 0));
}
else
{
expectedCoordinates.Add(new Coordinate(0, 0));
expectedCoordinates.Add(new Coordinate(0, 1));
expectedCoordinates.Add(new Coordinate(1, 1));
}
}
return(expectedCoordinates);
}
public void GenerateShapes_Returns2IsoscelesRightTrianglesWithNonHypotenuseSideOf1p_For1x1Grid(
IsoscelesTriangleCreatorStrategyProperties.IncreaseCountOns increaseCountOn,
IsoscelesTriangleCreatorStrategyProperties.TriangleHypotenusePositions triangleHypotenusePosition
)
{
//arrange
var properties = new IsoscelesTriangleCreatorStrategyProperties
{
NonHypotenuseSideLengthInPixels = 1,
GridMaxXCoordinateInPixels = 1,
GridMaxYCoordinateInPixels = 1,
IncreaseCountOn = increaseCountOn,
TriangleHypotenusePosition = triangleHypotenusePosition
};
var strategy = new IsoscelesTriangleCreatorStrategy(properties);
//act
List <Shape> shapes = strategy.GenerateShapes();
//assert
shapes.Count.Should().Be(2, $"a grid of 1x1 can be populated with 2 isosceles-right triangles");
//Shape leftTriangle, rightTriangle;
var shapeA1 = shapes.FindOneShapeByLabel("A1");
var shapeA2 = shapes.FindOneShapeByLabel("A2");
var expectedCoordinatesA1 = GetExpectedShapeA1For1x1Grid(properties);
var expectedCoordinatesA2 = GetExpectedShapeA2For1x1Grid(properties);
var expectedA1Shape = shapes.FindOneShapeByCoordinates(expectedCoordinatesA1);
var expectedA2Shape = shapes.FindOneShapeByCoordinates(expectedCoordinatesA2);
shapeA1.Equals(expectedA1Shape).Should().BeTrue();
shapeA2.Equals(expectedA2Shape).Should().BeTrue();
}
