autofixture

I have the following class and test. I want to test passing a null value as a parameter to the constructor and are expecting an ArgumentNullException . But since I use the Autofixture's CreateAnonymous method I get a TargetInvocationException instead. What is the correct way to write those kinds of tests? public sealed class CreateObject : Command { // Properties public ObjectId[] Ids { get; private set; } public ObjectTypeId ObjectType { get; private set; } public UserId CreatedBy { get; private set; } // Constructor public CreateObject(ObjectId[] ids, ObjectTypeId objectType, UserId

Is it possible to assign a fixed value to a property on a child instance when building a parent with Autofixture? It will add default values to all the properties on the child instance like a charm, but I would like to override and assign a specific value to one of the properties on the child instance. Given this parent/child relationship: public class Person { public string FirstName { get; set; } public string LastName { get; set; } public Address Address { get; set; } } public class Address { public string Street { get; set; } public int Number { get; set; } public string City { get; set; }

Does this test make proper use of AutoFixture and Moq? Is it written as concisely as possible? The test fails, as expected, and passes after writing the correct implementation. [Fact] public void CustomerPropertyIsCorrect() { var fixture = new AutoMoqFixture(); var expected = fixture.Create<CardHolderCustomer>(); var builderMock = fixture .Freeze<Mock<ICustomerAdapter>>() .Setup(x => x.BuildCustomer()).Returns(expected); var sut = fixture.Create<CardHolderViewModel>(); var actual = sut.Customer; Assert.Equal(expected, actual); } Nikos Baxevanis It's looking good! However, you can also use it

I need to create an object from AutoFixture using nothing more than a System.Type. However, there doesn't appear to be an overload of CreateAnonymous() that simply takes a type. They all expect a compile time generic T. Is there a way to convert a System.Type to T? Edit with usage details: I'm using AutoMapper, which has a hook for injecting components to support complex mapping scenarios: void ConstructServicesUsing(System.Func<Type,object> constructor) As you can see from the signature, clients can register a Func which AutoMapper invokes anytime it needs an injected service (mostly

I have the following class: class Foo { public Foo(string str, int i, bool b, DateTime d, string str2) { ..... } } I'm creating a Foo with AutoFixture: var foo = fixture.Create<Foo>(); but I want AutoFixture to provide a known value for the str2 parameter and use the default behavior for every other parameter. I tried implementing a SpecimenBuilder but I can't find a way to get the metadata associated with the request to know that I'm being called from the Foo constructor. Is there any way to achieve this? Orlando William As answered here you can have something like public class FooArg :

How can I use custom ISpecimenBuilder instances along with the OmitOnRecursionBehavior which I want applied globally to all fixture-created objects? I'm working with an EF Code First model with a foul-smelling circular reference that, for the purposes of this question, cannot be eliminated: public class Parent { public string Name { get; set; } public int Age { get; set; } public virtual Child Child { get; set; } } public class Child { public string Name { get; set; } public int Age { get; set; } public virtual Parent Parent { get; set; } } I'm familiar with the technique for side-stepping