C# 如何在单元测试中验证EF Core DBContext配置

当前，当DBContext模型的配置中出现错误时，我们会在运行时收到一个错误。例如：

实体类型“MyObject”需要定义主键。如果要使用无键实体类型，请调用“HasNoKey（）”

当应用程序中首次使用EF Core时，将抛出此错误。我想在单元测试中验证模型

我试过的 我注意到了stacktrace中的

[TestMethod]
public void MyDbContext_不超过rowexExceptions（）
{
//安排
var myDbContext=CreateMyDbContext（）；
IModel model=myDbContext.model；
var validator=new ModelValidator（new ModelValidatorDependencies（？？？，？？）/[EntityFrameworkInternal]公共ModelValidatorDependencies（[NotNull]ITypeMappingSource typeMappingSource[NotNull]IMemberClassifier memberClassifier）
//表演
validator.Validate（模型？）；//公共虚拟无效验证（IModel模型，IDiagnosticsLogger）
}

不幸的是，我现在不知道如何创建IDiagnosticsLogger，也不知道传递什么作为

IDiagnosticsLogger

——请参见代码中的

？

。 另外，

[EntityFrameworkInternal]

让我觉得我的方法是错误的

有人知道如何修复这个单元测试吗？（通过创建

modelvalidater

或其他方法）

细节 错误的完整堆栈跟踪：

Test method Foo threw exception: 
System.InvalidOperationException: The entity type 'MyEntity' requires a primary key to be defined. If you intended to use a keyless entity type call 'HasNoKey()'.
   at Microsoft.EntityFrameworkCore.Infrastructure.ModelValidator.ValidateNonNullPrimaryKeys(IModel model, IDiagnosticsLogger`1 logger)
   at Microsoft.EntityFrameworkCore.Infrastructure.ModelValidator.Validate(IModel model, IDiagnosticsLogger`1 logger)
   at Microsoft.EntityFrameworkCore.Infrastructure.RelationalModelValidator.Validate(IModel model, IDiagnosticsLogger`1 logger)
   at Microsoft.EntityFrameworkCore.SqlServer.Internal.SqlServerModelValidator.Validate(IModel model, IDiagnosticsLogger`1 logger)
   at Microsoft.EntityFrameworkCore.Metadata.Conventions.ValidatingConvention.ProcessModelFinalized(IConventionModelBuilder modelBuilder, IConventionContext`1 context)
   at Microsoft.EntityFrameworkCore.Metadata.Conventions.Internal.ConventionDispatcher.ImmediateConventionScope.OnModelFinalized(IConventionModelBuilder modelBuilder)
   at Microsoft.EntityFrameworkCore.Metadata.Conventions.Internal.ConventionDispatcher.OnModelFinalized(IConventionModelBuilder modelBuilder)
   at Microsoft.EntityFrameworkCore.Metadata.Internal.Model.FinalizeModel()
   at Microsoft.EntityFrameworkCore.ModelBuilder.FinalizeModel()
   at Microsoft.EntityFrameworkCore.Infrastructure.ModelSource.CreateModel(DbContext context, IConventionSetBuilder conventionSetBuilder)
   at Microsoft.EntityFrameworkCore.Infrastructure.ModelSource.GetModel(DbContext context, IConventionSetBuilder conventionSetBuilder)
   at Microsoft.EntityFrameworkCore.Internal.DbContextServices.CreateModel()
   at Microsoft.EntityFrameworkCore.Internal.DbContextServices.get_Model()
   at Microsoft.EntityFrameworkCore.Infrastructure.EntityFrameworkServicesBuilder.<>c.<TryAddCoreServices>b__7_3(IServiceProvider p)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitFactory(FactoryCallSite factoryCallSite, RuntimeResolverContext context)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitCache(ServiceCallSite callSite, RuntimeResolverContext context, ServiceProviderEngineScope serviceProviderEngine, RuntimeResolverLock lockType)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScopeCache(ServiceCallSite singletonCallSite, RuntimeResolverContext context)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor(ConstructorCallSite constructorCallSite, RuntimeResolverContext context)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain(ServiceCallSite callSite, TArgument argument)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitCache(ServiceCallSite callSite, RuntimeResolverContext context, ServiceProviderEngineScope serviceProviderEngine, RuntimeResolverLock lockType)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScopeCache(ServiceCallSite singletonCallSite, RuntimeResolverContext context)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite(ServiceCallSite callSite, TArgument argument)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.Resolve(ServiceCallSite callSite, ServiceProviderEngineScope scope)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.DynamicServiceProviderEngine.<>c__DisplayClass1_0.<RealizeService>b__0(ServiceProviderEngineScope scope)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.GetService(Type serviceType, ServiceProviderEngineScope serviceProviderEngineScope)
   at Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngineScope.GetService(Type serviceType)
   at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService(IServiceProvider provider, Type serviceType)
   at Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService[T](IServiceProvider provider)
   at Microsoft.EntityFrameworkCore.DbContext.get_DbContextDependencies()
   at Microsoft.EntityFrameworkCore.DbContext.get_InternalServiceProvider()
   at Microsoft.EntityFrameworkCore.DbContext.Microsoft.EntityFrameworkCore.Infrastructure.IInfrastructure<System.IServiceProvider>.get_Instance()
   at Microsoft.EntityFrameworkCore.Infrastructure.Internal.InfrastructureExtensions.GetService[TService](IInfrastructure`1 accessor)
   at Microsoft.EntityFrameworkCore.Infrastructure.AccessorExtensions.GetService[TService](IInfrastructure`1 accessor)
   at Microsoft.EntityFrameworkCore.Infrastructure.DatabaseFacade.get_Dependencies()
   at Microsoft.EntityFrameworkCore.Infrastructure.DatabaseFacade.Microsoft.EntityFrameworkCore.Internal.IDatabaseFacadeDependenciesAccessor.get_Dependencies()
   at Microsoft.EntityFrameworkCore.RelationalDatabaseFacadeExtensions.GetFacadeDependencies(DatabaseFacade databaseFacade)
   at Microsoft.EntityFrameworkCore.RelationalDatabaseFacadeExtensions.ExecuteSqlRaw(DatabaseFacade databaseFacade, String sql, IEnumerable`1 parameters)
   at Microsoft.EntityFrameworkCore.RelationalDatabaseFacadeExtensions.ExecuteSqlRaw(DatabaseFacade databaseFacade, String sql, Object[] parameters)
   at myCode

测试方法Foo引发异常：
System.InvalidOperationException:实体类型“MyEntity”需要定义主键。如果要使用无键实体类型，请调用“HasNoKey（）”。
位于Microsoft.EntityFrameworkCore.Infrastructure.ModelValidator.ValidateNonullPrimaryKeys（IModel模型，IDiagnosticsLogger`1 logger）
位于Microsoft.EntityFrameworkCore.Infrastructure.ModelValidator.Validate（IModel模型，IDiagnosticsLogger`1 logger）
位于Microsoft.EntityFrameworkCore.Infrastructure.RelationalModelValidator.Validate（IModel模型，IDiagnosticsLogger`1记录器）
位于Microsoft.EntityFrameworkCore.SqlServer.Internal.SqlServerModelValidator.Validate（IModel模型，IDiagnosticsLogger`1 logger）
位于Microsoft.EntityFrameworkCore.Metadata.Conventions.ValidatingConvention.ProcessModelFinalized（IConventionModelBuilder modelBuilder，IConventionContext`1上下文）
位于Microsoft.EntityFrameworkCore.Metadata.Conventions.Internal.ConventionDispatcher.ImmediateConventionScope.OnModelFinalized（IConventionModelBuilder modelBuilder modelBuilder）
位于Microsoft.EntityFrameworkCore.Metadata.Conventions.Internal.ConventionDispatcher.OnModelFinalized（IConventionModelBuilder modelBuilder）
在Microsoft.EntityFrameworkCore.Metadata.Internal.Model.FinalizeModel（）中
在Microsoft.EntityFrameworkCore.ModelBuilder.FinalizeModel（）中
位于Microsoft.EntityFrameworkCore.Infrastructure.ModelSource.CreateModel（DbContext上下文，IConventionSetBuilder约定SetBuilder）
位于Microsoft.EntityFrameworkCore.Infrastructure.ModelSource.GetModel（DbContext上下文，IConventionSetBuilder约定SetBuilder）
在Microsoft.EntityFrameworkCore.Internal.DbContextServices.CreateModel（）中
在Microsoft.EntityFrameworkCore.Internal.DbContextServices.get_Model（）中
位于Microsoft.EntityFrameworkCore.Infrastructure.EntityFrameworkServicesBuilder.c.b_uu7_u3（IServiceProvider p）
位于Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitFactory（FactoryCallSite FactoryCallSite，RuntimeResolverContext上下文）
位于Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain（ServiceCallSite callSite，Target参数）
在Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitCache（ServiceCallSite callSite、RuntimeResolverContext上下文、ServiceProviderEngineScope serviceProviderEngine、RuntimeResolverLockType）
位于Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScopeCache（ServiceCallSite singletonCallSite，RuntimeResolverContext上下文）
位于Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite（ServiceCallSite callSite，Target参数）
位于Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitConstructor（ConstructorCallSite ConstructorCallSite，RuntimeResolverContext上下文）
位于Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSiteMain（ServiceCallSite callSite，Target参数）
在Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitCache（ServiceCallSite callSite、RuntimeResolverContext上下文、ServiceProviderEngineScope serviceProviderEngine、RuntimeResolverLockType）
位于Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.VisitScopeCache（ServiceCallSite singletonCallSite，RuntimeResolverContext上下文）
位于Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteVisitor`2.VisitCallSite（ServiceCallSite callSite，Target参数）
位于Microsoft.Extensions.DependencyInjection.ServiceLookup.CallSiteRuntimeResolver.Resolve（ServiceCallSite callSite，ServiceProviderEngineScope作用域）
在Microsoft.Extensions.DependencyInjection.ServiceLookup.DynamicServiceProviderEngine.c__DisplayClass1_0.b__0（ServiceProviderEngineScope作用域）
在Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngine.GetService（输入serviceType，ServiceProviderEngineScope ServiceProviderEngineScope）
位于Microsoft.Extensions.DependencyInjection.ServiceLookup.ServiceProviderEngineScope.GetService（类型serviceType）
位于Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService（IServiceProvider提供程序，键入serviceType）
位于Microsoft.Extensions.DependencyInjection.ServiceProviderServiceExtensions.GetRequiredService[T]（IServiceProvider提供程序）
在Microsoft.EntityFrameworkCore.DbContext.get_DbContextDependencies（）中
在Microsoft.EntityF
var serviceCollection = new Microsoft.Extensions.DependencyInjection.ServiceCollection();
serviceCollection.AddEntityFrameworkSqlServer().AddDbContext<Context>();
var serviceProvider = serviceCollection.BuildServiceProvider();
var validator = serviceProvider.GetService<IModelValidator>();
var context = serviceProvider.GetService<Context>();

validator.Validate(context.Model);