private static void AssertSAMLImmutableCredentials(SAMLImmutableCredentials expected, ImmutableCredentials actual)
{
var actualSaml = actual as SAMLImmutableCredentials;
Assert.IsNotNull(actualSaml);
Assert.AreEqual(expected.AccessKey, actualSaml.AccessKey);
AssertExtensions.AssertDateTimesAreEqualToTheSecond(expected.Expires, actualSaml.Expires);
Assert.AreEqual(expected.SecretKey, actualSaml.SecretKey);
Assert.AreEqual(expected.Token, actualSaml.Token);
Assert.AreEqual(expected.Subject, actualSaml.Subject);
}