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正在对ODataQueryOptions进行模拟。净核心

odata asp.net-core c#

Mathean · 技术社区 · 7 年前

最近,我们决定使用该软件包 Microsoft.AspNetCore.OData 为我们的服务提供解决方案。这些服务具有ODataQueryOptions参数,并使用它来过滤它们提供的数据。为了进行单元测试,我需要以某种方式模拟ODataQueryOptions。过去使用系统更容易。网状物Http。奥达塔。查询ODataQueryOptions,因为您可以使用HttpRequestMessage作为参数创建它,但不能再使用它了。

我有这个密码

 public static ODataQueryOptions<T> Create<T>(string url = "", Action<ODataConventionModelBuilder> reconfigure = null)
               where T : class
    {
        var serviceCollection = new ServiceCollection();
        serviceCollection.AddMvcCore().AddApplicationPart(typeof(ODataFactory).Assembly);

        ODataConventionModelBuilder builder = new ODataConventionModelBuilder(serviceCollection.BuildServiceProvider());
        builder.EntitySet<T>("Entity");

        reconfigure?.Invoke(builder);

        ODataQueryContext context = new ODataQueryContext(builder.GetEdmModel(), typeof(T), new Microsoft.AspNet.OData.Routing.ODataPath());

        var httpContext = new DefaultHttpContext();

        var httpRequest = new DefaultHttpRequest(httpContext);

        // throws exception: Value cannot be null. Parameter name: provider
        return new ODataQueryOptions<T>(context, httpRequest);
    }

此代码引发下一个异常:

系统ArgumentNullException:值不能为null。参数名称:提供程序在微软。扩展。依赖注入。ServiceProviderServiceExtensions。GetRequiredService[T](IServiceProvider提供程序) 在微软。AspNet。奥达塔。扩展。HttpRequestExtensions。CreateRequestScope(HttpRequest请求,字符串routeName) 在微软。AspNet。奥达塔。扩展。HttpRequestExtensions。CreateRequestContainer(HttpRequest请求,字符串routeName) 在微软。AspNet。奥达塔。扩展。HttpRequestExtensions。GetRequestContainer(HttpRequest请求) 在微软。AspNet。奥达塔。查询ODataQueryOptions。。ctor(ODataQueryContext上下文,HttpRequest请求) 在微软。AspNet。奥达塔。查询ODataQueryOptions 1..ctor(ODataQueryContext context, HttpRequest request) at Services.Test.Internal.ODataFactory.Create[T](String url, Action 1重新配置)在C:\Users\wboun\source\repos\Services中。测试\内部\ ODataFactory。cs:第36行

3 回复 | 直到 7 年前

mccow002 7 年前

我知道如何通过 Value cannot be null. Parameter name: provider 错误和 Cannot find the services container for the non-OData route.

首先,在创建DefaultHttpContext对象时,必须将RequestServices设置为collection。BuildServiceProvider()。

接下来,必须启用DependencyInjection。我可以通过使用Moq来做到这一点。

var routeBuilder = new RouteBuilder(Mock.Of<IApplicationBuilder>(x => x.ApplicationServices == provider));
routeBuilder.EnableDependencyInjection();

我的完整代码是:

var collection = new ServiceCollection();

collection.AddOData();
collection.AddODataQueryFilter();
collection.AddTransient<ODataUriResolver>();
collection.AddTransient<ODataQueryValidator>();
collection.AddTransient<TopQueryValidator>();
collection.AddTransient<FilterQueryValidator>();
collection.AddTransient<SkipQueryValidator>();
collection.AddTransient<OrderByQueryValidator>();

var provider = collection.BuildServiceProvider();

var routeBuilder = new RouteBuilder(Mock.Of<IApplicationBuilder>(x => x.ApplicationServices == provider));
routeBuilder.EnableDependencyInjection();

var modelBuilder = new ODataConventionModelBuilder(provider);
modelBuilder.EntitySet<MyType>("MyType");
var model = modelBuilder.GetEdmModel();

var uri = new Uri("http://localhost/api/mytype/12345?$select=Id");

var httpContext = new DefaultHttpContext{
    RequestServices = provider
};
HttpRequest req = new DefaultHttpRequest(httpContext)
{
    Method = "GET",
    Host = new HostString(uri.Host, uri.Port),
    Path = uri.LocalPath,
    QueryString = new QueryString(uri.Query)
};

var context = new ODataQueryContext(model, typeof(MyType), new Microsoft.AspNet.OData.Routing.ODataPath());
var options = new ODataQueryOptions<MyType>(context, req);

Mathean 7 年前

在仔细研究了ODataQueryOptions的代码之后,我们找到了解决方案。

主要问题是在传递给ODataConventionModelBuilder构造函数的服务提供者中缺少所需对象的初始化

ServiceProvider GetServiceProvider()
    {
        var collection = new ServiceCollection();

        collection.AddMvc();
        collection.AddOData();
        collection.AddTransient<ODataUriResolver>();
        collection.AddTransient<ODataQueryValidator>();
        collection.AddTransient<TopQueryValidator>();
        collection.AddTransient<FilterQueryValidator>();
        collection.AddTransient<SkipQueryValidator>();
        collection.AddTransient<OrderByQueryValidator>();

        return collection.BuildServiceProvider();
    }

然后可以用

 var uri = new Uri(url);

        HttpRequest request = new DefaultHttpRequest(http) {
            Method = "GET",
            Host = new HostString(uri.Host, uri.Port),
            Path = uri.LocalPath,
            QueryString = new QueryString(uri.Query)
        };

Mauro Bilotti 4 年前

根据@mccow002答案,我只是发布了ODataHelper,其中包含了所需的名称空间(因为这也给我带来了麻烦),我已经将其用于需要ODataQueryOptions才能使其工作的单元测试中:

using Microsoft.AspNet.OData;
using Microsoft.AspNet.OData.Builder;
using Microsoft.AspNet.OData.Extensions;
using Microsoft.AspNet.OData.Query;
using Microsoft.AspNet.OData.Query.Validators;
using Microsoft.AspNetCore.Builder;
using Microsoft.AspNetCore.Http;
using Microsoft.AspNetCore.Routing;
using Microsoft.Extensions.DependencyInjection;
using Microsoft.OData.UriParser;
using Moq;
using System;

namespace Surgent.Evaluation.Tests.xUnit.Helpers
{
    public static class ODataHelper
    {
        public static ODataQueryOptions<T> Create<T>(string uri = "")
                where T : class
        {
            var provider = GetServiceProvider();
            var routeBuilder = new RouteBuilder(Mock.Of<IApplicationBuilder>(x => x.ApplicationServices == provider));
            routeBuilder.EnableDependencyInjection();            

            var modelBuilder = new ODataConventionModelBuilder(provider);
            modelBuilder.EntitySet<T>(nameof(T));
            var model = modelBuilder.GetEdmModel();

            var http = new DefaultHttpContext();
            var uri = new Uri(uri);

            http.Request.Method = "GET";
            http.Request.Host = new HostString(uri.Host, uri.Port);
            http.Request.Path = uri.LocalPath;
            http.Request.QueryString = new QueryString(uri.Query);
            http.RequestServices = provider;
                        
            HttpRequest request = http.Request;
            var context = new ODataQueryContext(model, typeof(T), new Microsoft.AspNet.OData.Routing.ODataPath());

            return new ODataQueryOptions<T>(context, request);
        }

        private static ServiceProvider GetServiceProvider()
        {
            var collection = new ServiceCollection();

            collection.AddMvcCore();
            collection.AddOData();
            collection.AddTransient<ODataUriResolver>();
            collection.AddTransient<ODataQueryValidator>();
            collection.AddTransient<TopQueryValidator>();
            collection.AddTransient<FilterQueryValidator>();
            collection.AddTransient<SkipQueryValidator>();
            collection.AddTransient<OrderByQueryValidator>();

            return collection.BuildServiceProvider();
        }
    }
}