public void TestIsNotTriangle()
{
// validate that it cannot form Triangle
int sideA = 90, sideB = 40, sideC = 40;
bool ans = TriangleSolver.IsTriangle(sideA, sideB, sideC);
bool validate = (sideA + sideB <= sideC || sideA + sideC <= sideB || sideB + sideC <= sideA) ? false : true;
Assert.AreEqual(ans, validate);
}