AttributeExistsConstraint - jnm2/nunit-docs-wiki GitHub Wiki
AttributeExistsConstraint tests for the existence of an attribute on a Type.
AttributeExistsConstraint(Type type)
Has.Attribute(typeof(TestFixtureAttribute))
Has.Attribute<TestFixtureAttribute>()
Assert.That(someObject, Has.Attribute(typeof(TestFixtureAttribute)));
Assert.That(someObject, Has.Attribute<TestFixtureAttribute>());