Class TypeRelay

Maps a request for one System.Type to a request for another Type.

Inheritance
System.Object
TypeRelay
Implements
Inherited Members
System.Object.Equals(System.Object)
System.Object.Equals(System.Object, System.Object)
System.Object.GetHashCode()
System.Object.GetType()
System.Object.MemberwiseClone()
System.Object.ReferenceEquals(System.Object, System.Object)
System.Object.ToString()
Namespace: AutoFixture.Kernel
Assembly: AutoFixture.dll
Syntax
public class TypeRelay : ISpecimenBuilder

Constructors

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TypeRelay(Type, Type)

Initializes a new instance of the TypeRelay class.

Declaration
public TypeRelay(Type from, Type to)
Parameters
Type Name Description
System.Type from

The System.Type from which the TypeRelay instance should map.
System.Type to

The System.Type to which the TypeRelay instance should map.
Remarks

The from and to parameters are used by the Create(Object, ISpecimenContext) method to map a request for the from Type into a request for the to Type.

Examples

In this example, BaseType is an abstract base class, and DerivedType is a concrete class that derives from BaseType. The Fixture instance is configured to relay all requests for BasetType to requests for DerivedType, so the actual result return from the fixture when BasetType is requested is a DerivedType instance.

var fixture = new Fixture();
fixture.Customizations.Add(
    new TypeRelay(
        typeof(BaseType),
        typeof(DerivedType)));

var actual = fixture.Create<BaseType>();

Properties

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From

Gets the type which is relayed from.

Declaration
public Type From { get; }
Property Value
Type Description
System.Type
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To

Gets the type which is relayed to.

Declaration
public Type To { get; }
Property Value
Type Description
System.Type

Methods

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Create(Object, ISpecimenContext)

Relays a request for the from Type into a request for the to Type.

Declaration
public object Create(object request, ISpecimenContext context)
Parameters
Type Name Description
System.Object request

The request that describes what to create.
ISpecimenContext context

A context that can be used to create other specimens.
Returns
Type Description
System.Object

If request is a request for the from Type, an instance of the to Type is returned; otherwise a NoSpecimen instance.
Remarks

The from and to Types are defined by constructor arguments. An exact match is performed when evaluating request against the from Type - i.e. derived types are not regarded as matches.

If the request matches the from Type, an instance of the to Type is requested from the context.

See Also

Implements

Extension Methods