public void Draw()
{
// Arrange
var canvasMock = new CanvasMock.Canvas();
var center = new Point(0, 0);
var vertexCount = 3;
var radius = 2;
var regularPolygon = new RegularPolygon(vertexCount, radius, center, ColorType.Blue);
var expectedDrawedLines = new HashSet <Line>
{
new Line {
From = new Point(2, 0), To = new Point(-1, 1.732)
},
new Line {
From = new Point(-1, 1.732), To = new Point(-1, -1.732)
},
new Line {
From = new Point(-1, -1.732), To = new Point(2, 0)
}
};
var expectedColor = ColorType.Blue;
// Act
regularPolygon.Draw(canvasMock);
// Assert
Assert.Equal(expectedColor, canvasMock.Color);
Assert.Equal(expectedDrawedLines, canvasMock.LastDrawedLines);
}
public void Draw_WithRegularPolygon_ShouldWriteDrawingInfo()
{
var center = new Point(100, 100);
double radius = 30;
int vertexCount = 3;
var color = Color.Green;
var regularPolygon = new RegularPolygon(center, radius, vertexCount, color);
var sw = new StringWriter();
var canvas = new TestCanvas(sw);
regularPolygon.Draw(canvas);
var expectedString = "Green line from (130, 100), to (85, 125,98076211353316)\r\n" +
"Green line from (85, 125,98076211353316), to (84,99999999999999, 74,01923788646684)\r\n" +
"Green line from (84,99999999999999, 74,01923788646684), to (130, 99,99999999999999)\r\n";
Assert.AreEqual(expectedString, sw.ToString());
}
public void CreateRegularPolygonTest()
{
StringWriter stringWriter = new StringWriter();
Canvas canvas = new Canvas(stringWriter);
Point center = new Point(1.0, 1.0);
RegularPolygon regularPolygon = new RegularPolygon(center, 2, 1);
regularPolygon.Draw(canvas);
string result =
"Line\r\n"
+ "From x: 2 y: 1\r\n"
+ "To x: 0 y: 1\r\n"
+ "Line\r\n"
+ "From x: 0 y: 1\r\n"
+ "To x: 2 y: 1\r\n";
Assert.AreEqual(result, stringWriter.ToString());
Assert.AreEqual(center, regularPolygon.GetCenter());
Assert.AreEqual(2, regularPolygon.GetVertexCount());
Assert.AreEqual(1, regularPolygon.GetRadius());
}
public void CanDrawRegularPolygon()
{
var vertexCount = 3;
var center = new Point(4, 4);
var radius = 3;
var color = Color.Red;
var regularPolygon = new RegularPolygon(vertexCount, center, radius, color);
TestCanvas canvas = new TestCanvas();
var angle = 360f / vertexCount;
var vertex1 = GetVertexByAngle(angle * 0);
for (var i = 1; i < vertexCount; ++i)
{
var vertex2 = GetVertexByAngle(angle * i);
canvas.ExpectedData.Add($"{vertex1} {vertex2}");
vertex1 = vertex2;
}
regularPolygon.Draw(canvas);
}