public void IsTestNumber_NumberDivisibleByThree_True()
{
TestNumber testTestNumber = new TestNumber();
Assert.AreEqual("Ping", testTestNumber.IsTestNumber(9));
}
public void IsTestNumber_NumberDivisibleByFive_True()
{
TestNumber testTestNumber = new TestNumber();
Assert.AreEqual("Pong", testTestNumber.IsTestNumber(12));
}