Question

我目前正在尝试为.NET Core 2.2 API设置集成测试。每当我运行测试时，都会出现以下错误：

Message: System.NullReferenceException : Object reference not set to an instance of an object.

我已经搜索过，但找不到任何有关此内容或为何收到此错误的信息。

这是我的测试UsersIntegrationTests类，该错误告诉我在方法开始时此行中出现空引用异常：“公共异步任务Test1Async（string方法）”

我对此一无所知，而且我对.NET Core相对陌生。这可能是一个漫长的过程，但是如果有人以前遇到过这个问题并且知道如何解决它，并且可以解释一下如何使这些测试运行？

public class UsersIntegrationTests
{
    private readonly HttpClient _client;
    private readonly TestServer _server;

    public UsersIntegrationTests()
    {
        _server = new TestServer(new WebHostBuilder()
            .UseEnvironment("Development")
            .UseStartup<Startup>());
        _client = _server.CreateClient();
    }

    [Theory]
    [InlineData("GET")]
    public async Task Test1Async(string method)
    {
        var request = new HttpRequestMessage(new HttpMethod(method), "/api/values");

        var response = await _client.SendAsync(request);

        response.EnsureSuccessStatusCode();

        Assert.Equal(HttpStatusCode.OK, response.StatusCode);
    }
}

我的startup.cs类：

public class Startup
{
    public Startup(IConfiguration configuration)
    {
        Configuration = configuration;
    }

    public IConfiguration Configuration { get; }

    // This method gets called by the runtime. Use this method to add services to the container.
    public void ConfigureServices(IServiceCollection services)
    {
        services.AddDbContext<TestDBContext>(options => options.UseSqlServer(Configuration.GetConnectionString("DefaultConnection")));
        services.AddMvc().SetCompatibilityVersion(CompatibilityVersion.Version_2_2);

        // Get information from the app settings and make use of it
        var appSettingsSection = Configuration.GetSection("AppSecrets");
        services.Configure<AppSecrets>(appSettingsSection);
        var appSettings = appSettingsSection.Get<AppSecrets>();

        //string connection = appSettings.ConnectionString;
        //services.AddDbContext<TestDBContext>(options => options.UseSqlServer("Server=DESKTOP-F9KBARO;Database=TestDB;Trusted_Connection=True;MultipleActiveResultSets=True"));

        var key = Encoding.UTF8.GetBytes(appSettings.Secret);

        services.AddAuthentication(JwtBearerDefaults.AuthenticationScheme).AddJwtBearer(options =>
        {
            options.TokenValidationParameters = new TokenValidationParameters()
            {
                ValidateIssuer = true,
                ValidateAudience = true,
                ValidateIssuerSigningKey = true,
                ValidIssuer = "http://localhost:52459",
                ValidAudience = "http://localhost:52459",
                ValidateLifetime = true,
                ClockSkew = TimeSpan.Zero,
                IssuerSigningKey = new SymmetricSecurityKey(key)
            };
        });

        services.AddCors(options =>
        {
            options.AddPolicy("AllowAll", p =>
            {
                p.AllowAnyOrigin()
                .AllowAnyHeader()
                .AllowAnyMethod();
            });
        });

        DependencyInjectionConfig.AddScope(services);
    }

    // This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
    public void Configure(IApplicationBuilder app, IHostingEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }
        else
        {
            // The default HSTS value is 30 days. You may want to change this for production scenarios, see https://aka.ms/aspnetcore-hsts.
            app.UseHsts();
        }

        AutoMapper.Mapper.Initialize(cfg =>
        {
            cfg.CreateMap<Data.Models.UserForCreationDto, Data.Entities.AppUser>();
        });
        //app.ConfigureCustomExceptionMiddleware();
        app.UseCors("AllowAll");
        app.UseHttpsRedirection();
        app.UseMvc();
    }
}

.NET Core 2.2 API集成测试失败，出现NullReferenceException错误

0 个答案: