c# - 用于测试的 IHostingEnvironment

Question

我正在尝试使用 ABP 2.0.2 中的单元测试项目，但在运行所选测试 GetUsers_Test() 时出现以下错误。

Message: Castle.MicroKernel.Handlers.HandlerException : Can't create component 'imfundoplatform.imfundoplatformCoreModule' as it has dependencies to be satisfied.

'imfundoplatform.imfundoplatformCoreModule' is waiting for the following dependencies:
- Service 'Microsoft.AspNetCore.Hosting.IHostingEnvironment' which was not registered.

我的核心模块的构造函数:

public imfundoplatformCoreModule(IHostingEnvironment env)
{
    _appConfiguration = AppConfigurations.Get(env.ContentRootPath, env.EnvironmentName, env.IsDevelopment());
}

我不知道如何将它传递给模块或让单元测试正常工作。请帮忙!

Answer 1

您可以注入(inject) IHostingEnvironment。但是你必须以一些奇怪的方式来做:

首先像这样创建一个模拟的 IHostingEnvrionment 类(根据您的需要进行调整):

public class MockHostingEnvironment : IHostingEnvironment, ISingletonDependency
{
    public string EnvironmentName
    {
        get => throw new NotImplementedException();
        set => throw new NotImplementedException();
    }

    public string ApplicationName
    {
        get => throw new NotImplementedException();
        set => throw new NotImplementedException();
    }
    public string WebRootPath { get; set; } = Path.Combine(Environment.CurrentDirectory, "wwwroot");
    public IFileProvider WebRootFileProvider
    {
        get => throw new NotImplementedException();
        set => throw new NotImplementedException();
    }

    public string ContentRootPath { get; set; } = Environment.CurrentDirectory;

    public IFileProvider ContentRootFileProvider
    {
        get => throw new NotImplementedException();
        set => throw new NotImplementedException();
    }
}

之后将其添加到您的 TestModule 的 Initialize() 中:

public override void Initialize()
{
    (...)
    IocManager.Register<IHostingEnvironment, MockHostingEnvironment>(DependencyLifeStyle.Singleton);
}

请注意，使用 Environment.CurrentDirectory 是一种非常糟糕的做法。它可能指向不同的目录，具体取决于您的 CI、测试运行器、测试框架等。

如果您在测试中使用需要 IHostingEnvironment 的服务，您应该仅使用此 MockHostingEnvironment。