public void CalculatePlusDouble()
{
Assert.AreEqual(Calculator.Plus(1.5, 2), 3.5);
Assert.AreEqual(Calculator.Plus(2, 2.5), 4.5);
}
public void CalculatePlusInValid()
{
Assert.AreEqual(Calculator.Plus("a", 2), "Invalid input for a or b");
}
public void CalculatePlusInt()
{
Assert.AreEqual(Calculator.Plus(1, 2), 3);
}