Guid

Describes the possible expectations for Guid values.

Expectation	Negated	Summary
IsEqualTo	IsNotEqualTo	equal to the expected value
IsOneOf	IsNotOneOf	equal to one of the expected values
IsEmpty	IsNotEmpty	Guid.Empty
IsNullOrEmpty	IsNotNullOrEmpty	null or Guid.Empty (only Guid?)

Equality

You can verify that the Guid is equal to another one or not:

Guid albumId = Guid.Parse("5c01d9d2-66f7-4782-8c14-e54eae9aaacc");

await Expect.That(albumId).IsEqualTo(Guid.Parse("5c01d9d2-66f7-4782-8c14-e54eae9aaacc"));
await Expect.That(albumId).IsNotEqualTo(Guid.Parse("cdd7a485-40a1-4bba-bb8b-d0e903704b02"));

One of

You can verify that the Guid is one of many alternatives:

Guid albumId = Guid.Parse("5c01d9d2-66f7-4782-8c14-e54eae9aaacc");

await Expect.That(albumId).IsOneOf(
  Guid.Parse("5c01d9d2-66f7-4782-8c14-e54eae9aaacc"),
  Guid.Parse("cdd7a485-40a1-4bba-bb8b-d0e903704b02"));
await Expect.That(albumId).IsNotOneOf(
  Guid.Parse("cdd7a485-40a1-4bba-bb8b-d0e903704b02"),
  Guid.Parse("f1a0a5f4-1f63-4dd4-8d42-6d2f7a0a1c11"));

Empty

You can verify that the Guid is (null or) empty or not:

await Expect.That(Guid.Empty).IsEmpty();
await Expect.That(Guid.NewGuid()).IsNotEmpty();

Guid? missingId = Guid.Empty;
await Expect.That(missingId).IsNullOrEmpty();
Guid? albumId = Guid.NewGuid();
await Expect.That(albumId).IsNotNullOrEmpty();