.NetCore启动配置的单元测试失败

Question

我有一个使用.NetCore创建的Windows服务应用程序。 我想为服务方法创建一些单元测试。

启动类如下

public class Startup
{
    public static IConfiguration Configuration;

    public Startup(IConfiguration configuration)
    {
        Configuration = configuration;
    }
    
    public void Configure(IApplicationBuilder app, IWebHostEnvironment env)
    {
        if (env.IsDevelopment())
        {
            app.UseDeveloperExceptionPage();
        }
    }
}

需要测试的类

public class ModelConsumer : IModelConsumer
{        
    private readonly IProcessHandler _processHandler;

    public ModelConsumer(IIProcessHandler processHandler)
    {
        _processHandler = processHandler;
    }

    public void OnMessageReceived(ModelDto model)
    {
        var exportFolder = Startup.Configuration["ExportFolder"];           
        
       // do actions
    }
}

测试班

[TestClass]
public class ModelConsumerTests
{
    [TestMethod]
    public void OnMessageReceived()
    {
        var processHandler = new Mock<IProcessHandler>();
        var modelConsumer = new ModelConsumer(processHandler.Object);

        var config = InitConfiguration();
        var _exportFolder = config["ExportFolder"];

        modelConsumer.OnMessageReceived(new ModelDto());

        // verify mock call actions
    }

    public static IConfiguration InitConfiguration()
    {
        var config = new ConfigurationBuilder()
            .AddJsonFile("appsettings.json")
            .Build();
        return config;
    }
}

运行测试方法时，出现以下错误

配置中缺少某些内容，因此测试可以成功运行吗？

Answer 1

期望 Test 项目的appsettings.json文件夹中有bin/。因此，您必须将其复制到测试项目中/新建一个项目，并确保将其复制到构建版本的输出中。