public void TestInvalidExpressions(String inputExpression)
 {
     Assert.False(ExValidator.Valid(inputExpression), "Should be Invalid Expression");
     Assert.False(ExValidator.Valid(inputExpression), "Should be Invalid Expression");
 }
 public void TestValidExpressions(String inputExpression)
 {
     Assert.True(ExValidator.Valid(inputExpression), "Should be Valid Expression");
     Assert.True(ExValidator.Valid(inputExpression), "Should be Valid Expression");
 }