public void TestEquals()
{
var mailbox1 = new Mailbox("tester", "test.de");
var mailbox2 = new Mailbox("Tester", "Test.de");
var mailbox3 = new Mailbox("tester", "test.de", "Tester");
var mailbox4 = new Mailbox("tester2", "test.de");
Assert.False(mailbox1.Equals(null));
Assert.Equal(mailbox1, mailbox2);
Assert.Equal(mailbox1, mailbox3);
Assert.Equal(mailbox2, mailbox3);
Assert.NotEqual(mailbox1, mailbox4);
Assert.NotEqual(mailbox2, mailbox4);
Assert.NotEqual(mailbox3, mailbox4);
Assert.True(mailbox1.Equals((object)mailbox1));
Assert.True(mailbox1.Equals((object)mailbox2));
Assert.False(mailbox1.Equals((object)null));
Assert.False(mailbox1.Equals(new object()));
}