// 获得三角形类型描述
public static string GetTriangleType(TriangleDefinition triangle)
{
TriangleType type = TriangleType.CommonTriangle;
// 判断类型
if (!IsTriangle(triangle))
{
type = TriangleType.InvalidTriangle;
}
else if (IsRightTriangle(triangle))
{
type = TriangleType.RightTriangle;
}
else if (IsEquilateralTriangle(triangle))
{
type = TriangleType.EquilateralTriangle;
}
else if (IsoscelesTriangle(triangle))
{
type = TriangleType.IsoscelesTriangle;
}
// 返回类型描述字符串
return(type.GetDescription());
}
public void Given_Valid_Input_Output_Right_TypeDescription()
{
// 期望结果 Arrange
string common_triangle = "一般三角形";
string isosceles_triangle = "等腰三角形";
string right_triangle = "直角三角形";
string equilateral_triangle = "等边三角形";
// 测试用例
TriangleDefinition com_triangle = new TriangleDefinition(2, 3, 4);
TriangleDefinition iso_triangle = new TriangleDefinition(1, 2, 2);
TriangleDefinition rig_triangle = new TriangleDefinition(3, 4, 5);
TriangleDefinition equ_triangle = new TriangleDefinition(6, 6, 6);
// 运行判定 Act and Assert
TestContext.WriteLine(Evaluator.GetTriangleType(com_triangle));
Assert.AreEqual(Evaluator.GetTriangleType(com_triangle), common_triangle);
TestContext.WriteLine(Evaluator.GetTriangleType(iso_triangle));
Assert.AreEqual(Evaluator.GetTriangleType(iso_triangle), isosceles_triangle);
TestContext.WriteLine(Evaluator.GetTriangleType(rig_triangle));
Assert.AreEqual(Evaluator.GetTriangleType(rig_triangle), right_triangle);
TestContext.WriteLine(Evaluator.GetTriangleType(equ_triangle));
Assert.AreEqual(Evaluator.GetTriangleType(equ_triangle), equilateral_triangle);
}
// 判断是否是等边三角形
public static bool IsEquilateralTriangle(TriangleDefinition triangle)
{
if (triangle.A == triangle.B && triangle.B == triangle.C)
{
return(true);
}
return(false);
}
// 判断是否是直角三角形
public static bool IsRightTriangle(TriangleDefinition triangle)
{
if (Math.Pow(triangle.A, 2) + Math.Pow(triangle.B, 2) == Math.Pow(triangle.C, 2) ||
Math.Pow(triangle.A, 2) + Math.Pow(triangle.C, 2) == Math.Pow(triangle.B, 2) ||
Math.Pow(triangle.B, 2) + Math.Pow(triangle.C, 2) == Math.Pow(triangle.A, 2))
{
return(true);
}
return(false);
}
public void CheckTriangle()
{
double a = 5;
double b = 4;
double c = 3;
double expected = 6;
TriangleDefinition triangle = new TriangleDefinition(a, b, c);
Figure figure = triangle.shapeDefinition();
Assert.AreEqual(expected, figure.getSquare());
}
// 判断是否是三角形
public static bool IsTriangle(TriangleDefinition triangle)
{
if (triangle.A <= 0 || triangle.B <= 0 || triangle.C <= 0 ||
triangle.A + triangle.B <= triangle.C ||
triangle.A + triangle.C <= triangle.B ||
triangle.B + triangle.C <= triangle.A)
{
return(false);
}
return(true);
}
// 判断是否是等腰三角形
public static bool IsoscelesTriangle(TriangleDefinition triangle)
{
if (triangle.A == triangle.B ||
triangle.B == triangle.C ||
triangle.A == triangle.C &&
!IsEquilateralTriangle(triangle))
{
return(true);
}
return(false);
}