test/System.Web.Http.Test/ModelBinding/Binders/ComplexModelDtoModelBinderProviderTest.cs


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using System.Web.Http.Metadata.Providers;
using Xunit;

namespace System.Web.Http.ModelBinding.Binders
{
    public class ComplexModelDtoModelBinderProviderTest
    {
        [Fact]
        public void GetBinder_TypeDoesNotMatch_ReturnsNull()
        {
            // Arrange
            ComplexModelDtoModelBinderProvider provider = new ComplexModelDtoModelBinderProvider();
            ModelBindingContext bindingContext = GetBindingContext(typeof(object));

            // Act
            IModelBinder binder = provider.GetBinder(null, bindingContext);

            // Assert
            Assert.Null(binder);
        }

        [Fact]
        public void GetBinder_TypeMatches_ReturnsBinder()
        {
            // Arrange
            ComplexModelDtoModelBinderProvider provider = new ComplexModelDtoModelBinderProvider();
            ModelBindingContext bindingContext = GetBindingContext(typeof(ComplexModelDto));

            // Act
            IModelBinder binder = provider.GetBinder(null, bindingContext);

            // Assert
            Assert.IsType<ComplexModelDtoModelBinder>(binder);
        }

        private static ModelBindingContext GetBindingContext(Type modelType)
        {
            return new ModelBindingContext
            {
                ModelMetadata = new EmptyModelMetadataProvider().GetMetadataForType(() => null, modelType)
            };
        }
    }
}