AttributeExists Constraint

AttributeExistsConstraint tests for the existence of an attribute on a type.

Usage

Has.Attribute(Type attributeType)
Has.Attribute<TAttribute>()

Examples

[Serializable]
public class SerializableClass { }

[Test]
public void AttributeExistsConstraint_Examples()
{
    // Test that a type has an attribute
    Assert.That(typeof(SerializableClass), Has.Attribute<SerializableAttribute>());

    // Negative test
    Assert.That(typeof(TypeConstraintSnippets), Has.No.Attribute<SerializableAttribute>());
}

Notes

  1. When no further constraint is chained, Has.Attribute creates an AttributeExistsConstraint.
  2. When a constraint is chained (e.g., .Property("Name")), it becomes an AttributeConstraint.
  3. The constraint works on both Type objects and instances (testing the instance's type).

See Also