ASP.NET Core - 模型绑定测试

Question

我发现以下帖子描述了如何测试自定义模型绑定器：

/sf/answers/3877101511/

然而，这测试了单个模型绑定器。理想情况下，我希望能够注册所有活页夹并测试是否绑定了适当的模型。这就是我在 ASP.NET MVC 中实现我所寻找的目标的方式：

// Register the model binders
ModelBinders.Binders[typeof(DateTime)] = new DateTimeModelBinder();
...

var values = new NameValueCollection {
    { "Foo", "1964/12/02 12:00:00" }
};

var controllerContext = CreateControllerContext(); // Utility method
var bindingContext = new ModelBindingContext() {
    ModelName = "Foo",
    ValueProvider = new NameValueCollectionValueProvider(values, null)
};
var binder = ModelBinders.Binders.GetBinder(typeof(DateTime));

var result = (DateTime)binder.BindModel(controllerContext, bindingContext);

这不仅允许我测试模型绑定器的结果，而且还确保选择正确的模型绑定器。

如果有人可以提供帮助，我将不胜感激。谢谢

Answer 1

我已经设法把一些东西放在一起。感谢@HereticMonkey 提供的链接帮助了我。

[Fact]
public async Task Test() {
    // Arrange
    var services = new ServiceCollection();
    services.AddSingleton<ILoggerFactory, NullLoggerFactory>();
    services.AddSingleton<ObjectPoolProvider, DefaultObjectPoolProvider>();
    services.AddMvc(o => {
        o.ModelBinderProviders.Insert(0, new DateTimeModelBinderProvider());
    });
    var serviceProvider = services.BuildServiceProvider();

    var options = serviceProvider.GetService<IOptions<MvcOptions>>();
    var compositeDetailsProvider = new DefaultCompositeMetadataDetailsProvider(new List<IMetadataDetailsProvider>());
    var metadataProvider = new DefaultModelMetadataProvider(compositeDetailsProvider);
    var modelBinderFactory = new ModelBinderFactory(metadataProvider, options, serviceProvider);

    var parameterBinder = new ParameterBinder(
        metadataProvider,
        modelBinderFactory,
        new Mock<IObjectModelValidator>().Object,
        options,
        NullLoggerFactory.Instance);

    var parameter = new ParameterDescriptor() {
        Name = "parameter",
        ParameterType = typeof(DateTime)
    };

    var controllerContext = new ControllerContext() {
        HttpContext = new DefaultHttpContext() {
            RequestServices = serviceProvider // You must set this otherwise BinderTypeModelBinder will not resolve the specified type
        },
        RouteData = new RouteData()
    };

    var modelMetadata = metadataProvider.GetMetadataForType(parameter.ParameterType);

    var formCollection = new FormCollection(new Dictionary<string, StringValues>() {
        { "Foo", new StringValues("1964/12/02 12:00:00") }
    });
    var valueProvider = new FormValueProvider(BindingSource.Form, formCollection, CultureInfo.CurrentCulture);

    var modelBinder = modelBinderFactory.CreateBinder(new ModelBinderFactoryContext() {
        BindingInfo = parameter.BindingInfo,
        Metadata = modelMetadata,
        CacheToken = parameter
    });

    // Act
    var modelBindingResult = await parameterBinder.BindModelAsync(
        controllerContext,
        modelBinder,
        valueProvider,
        parameter,
        modelMetadata,
        value: null);

    // Assert
    Assert.True(modelBindingResult.IsModelSet);
}