public void CheckingTriangle_InputInvalidValues_ThrowsArgumentException(int a, int b, int c)
 {
     NUnit.Framework.Assert.Throws <ArgumentException>(() => CheckTriangle.CheckingTriangle(a, b, c));
 }
 public static bool CheckingTriangle_PositiveTest(int a, int b, int c)
 {
     return(CheckTriangle.CheckingTriangle(a, b, c));
 }