ServiceProviderServiceExtensions.GetRequiredService 不得用于设置和验证表达式

Question

如何在用于注入缓存的 xUnit 中注入 ServiceProvider 的依赖项 object。

xUnit 给出以下错误

ServiceProviderServiceExtensions.GetRequiredService may not be used in setup / verification expressions.

Answer 1

• 您需要在构造函数中初始化包含ServiceProvider的ServiceCollection()并为模拟构建服务提供者。

---

   public class UpdateUnitTest()
     {
       public UpdateUnitTest()
        {
       _cacheMock = new Mock<IDistributedCache>();
       var serviceCollection = new ServiceCollection();
       serviceCollection.AddScoped<IDistributedCache>(_ => _cacheMock.Object);

       // Create the ServiceProvider
       var serviceProvider = serviceCollection.BuildServiceProvider();

       // serviceScopeMock will contain my ServiceProvider
       var serviceScopeMock = new Mock<IServiceScope>();
        serviceScopeMock.SetupGet<IServiceProvider>(s => s.ServiceProvider)
       .Returns(serviceProvider);

       var serviceScopeFactoryMock = new Mock<IServiceScopeFactory>();
       serviceScopeFactoryMock.Setup(s => s.CreateScope()).Returns(serviceScopeMock.Object);
       _cacheMock = new Mock<IDistributedCache>();
       _handler = new ClassHandler(
       new Mock<ILogger<ClassHandler>>().Object,
       new OptionsWrapper<CacheOptions>(new CacheOptions()),
       serviceProvider);
        }
    }