public TriangleType GetTriangleType(TriangleTypeRequest request)
{
var sides = new [] { request.A, request.B, request.C };
sides = sides.OrderByDescending(c => c).ToArray();
if (sides[2] <= 0 || sides[0] >= sides[1] + sides[2])
{
throw new InvalidTriangleException();
}
if (sides[0] == sides[1] && sides[0] == sides[2])
{
return(TriangleType.Equilateral);
}
if (sides[0] * sides[0] == sides[1] * sides[1] + sides[2] * sides[2])
{
// note: impossible to get isosceles right triangle with integer side length
return(sides[1] == sides[2] ? TriangleType.IsoscelesRight : TriangleType.Right);
}
if (sides[1] == sides[2])
{
return(TriangleType.Isosceles);
}
return(TriangleType.Scalene);
}
private dynamic GetTriangleType()
{
TriangleTypeRequest request = null;
try
{
request = this.Bind <TriangleTypeRequest>();
}
catch (ModelBindingException)
{
return(new TextResponse("Error"));
}
TriangleType result;
try
{
result = _triangleTypeService.GetTriangleType(request);
}
catch (InvalidTriangleException)
{
return(new TextResponse("Error"));
}
return(new TextResponse(result.ToString("G")));
}
public void TestInvalidValue(int a, int b, int c)
{
var request = new TriangleTypeRequest {
A = a, B = b, C = c
};
Assert.Throws <InvalidTriangleException>(() => _subject.GetTriangleType(request));
}
public TriangleType TestService(int a, int b, int c)
{
var request = new TriangleTypeRequest {
A = a, B = b, C = c
};
return(_subject.GetTriangleType(request));
}
