public void HasInputTest()
{
//test 1: invalid, input is null
Assert.AreEqual(false, ValidationMethods.HasInput(null));
//test 2: invalid, input is nothing
Assert.AreEqual(false, ValidationMethods.HasInput(""));
//test 3: invalid, input is nothing but spaces
Assert.AreEqual(false, ValidationMethods.HasInput(" "));
//test 4: valid, input is a valid string input
Assert.AreEqual(true, ValidationMethods.HasInput("Hello, World!"));
}