public void BasicTest()
{
Assert.AreEqual("Welcome", Welcome.Greet("english"));
Assert.AreEqual("Welkom", Welcome.Greet("dutch"));
Assert.AreEqual("Welcome", Welcome.Greet("IP_ADDRESS_INVALID"));
Assert.AreEqual("Welcome", Welcome.Greet(""));
Assert.AreEqual("Welcome", Welcome.Greet("2"));
}