public void TestLookupCredentialWithCredentialCache()
{
var credentials = new CredentialCache();
var credPopuser1 = new NetworkCredential("popuser1", "password");
var credPopuser2 = new NetworkCredential("popuser2", "password");
var credImapuser1 = new NetworkCredential("imapuser1", "password");
var credImapuser2 = new NetworkCredential("imapuser2", "password");
credentials.Add("localhost", 110, string.Empty, credPopuser1);
credentials.Add("localhost", 110, "cram-md5", credPopuser2);
credentials.Add("localhost", 143, string.Empty, credImapuser1);
credentials.Add("localhost", 143, "digest-md5", credImapuser2);
Assert.AreEqual(credPopuser1, credentials.LookupCredential("localhost", 110, "popuser1", null));
Assert.AreEqual(credPopuser2, credentials.LookupCredential("localhost", 110, "popuser2", "CRAM-MD5"));
Assert.AreEqual(credImapuser1, credentials.LookupCredential("localhost", 143, "imapuser1", null));
Assert.AreEqual(credImapuser2, credentials.LookupCredential("localhost", 143, "imapuser2", "DIGEST-MD5"));
Assert.AreEqual(credPopuser1, credentials.LookupCredential("localhost", 110, null, null));
Assert.AreEqual(credPopuser2, credentials.LookupCredential("localhost", 110, null, "CRAM-MD5"));
Assert.IsNull(credentials.LookupCredential("localhost", 110, null, "DIGEST-MD5"));
Assert.AreEqual(credImapuser1, credentials.LookupCredential("localhost", 143, null, null));
Assert.AreEqual(credImapuser2, credentials.LookupCredential("localhost", 143, null, "DIGEST-MD5"));
Assert.IsNull(credentials.LookupCredential("localhost", 143, null, "CRAM-MD5"));
}