How to unit test modelbinder with ModelMetadata

Question

How do I unit test a custom ModelBinder?

Here\'s the code.

public class MagicBinder : DefaultModelBinder
    {

        public override object BindMo         


        

Answer 1

Try like this:

[TestMethod]
public void TestFooBinding()
{
    // arrange
    var formCollection = new NameValueCollection 
    {
        { "Number", "2" },
        { "Test", "12" },
    };

    var valueProvider = new NameValueCollectionValueProvider(formCollection, null);
    var metadata = ModelMetadataProviders.Current.GetMetadataForType(null, typeof(Foo));
    var bindingContext = new ModelBindingContext
    {
        ModelName = "",
        ValueProvider = valueProvider,
        ModelMetadata = metadata
    };
    var controllerContext = new ControllerContext();
    var sut = new MagicBinder();

    // act    
    Foo actual = (Foo)sut.BindModel(controllerContext, bindingContext);

    // assert
    // TODO:
}