public void TestHeaderSender()
{
HeaderSender sender = new HeaderSender("Hello");
string expected = "Hello\n\nGoodbye";
StringAssert.AreEqualIgnoringCase(sender.AppendMessage("Goodbye"), expected);
}
public void TestHeaderFooterSender()
{
EmailSender sender = new FooterSender("Goodbye", new HeaderSender("Hello"));
EmailSender sender2 = new HeaderSender("Hello", new FooterSender("Goodbye"));
string expected = "Hello\n\nSir\n\nGoodbye";
StringAssert.AreEqualIgnoringCase(sender.AppendMessage("Sir"), expected);
StringAssert.AreEqualIgnoringCase(sender2.AppendMessage("Sir"), expected);
}