c# – 运行单元测试时是否可以加载来自launchSettings.json文件的配置文件？

2023年2月14日 238次阅读

我正在运行单元测试作为ASP.NET核心MVC解决方案的一部分.确切地说,.NET Core的版本是2.1.

我在launchSettings.json文件中创建了一个配置文件部分,其中包含我希望由测试运行器加载和注入的环境变量,以便环境变量可用并且在运行单元测试时可以包含特定值.

我的ASP.NET Core MVC项目中的launchSettings.json作为链接添加到我的单元测试项目中,并且属性设置为Build Action – None,Copy to output folder – Copy Always.

该文件被复制到我的输出文件夹,但我不知道如何让测试运行器将此文件与UnitTesting配置文件一起使用.我尝试使用“测试”这个词作为配置文件名称,似乎没有任何效果.

这是一个示例launchSettings.json文件：

{
  "iisSettings": {
    "windowsAuthentication": false,
    "anonymousAuthentication": true,
    "iisExpress": {
      "applicationUrl": "http://localhost:62267/",
      "sslPort": 0
    }
  },
  "profiles": {
    "IIS Express": {
      "commandName": "IISExpress",
      "launchBrowser": true,
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development",
        "MigrationHistoryTableName": "MigrationHistory",
        "ConnectionStringName": "EFConnectionString",
        "Redis__SSL": "True",
        "Redis__Port": "6380",
        "Redis__InstanceName": "RedisDev",
        "Redis__AbortConnect": "False",
        "Redis__ConnectionString": "{URI}:{Port},password={Password},ssl={SSL},abortConnect={AbortConnect}"
      }
    },
    "MyDataServices": {
      "commandName": "Project",
      "launchBrowser": true,
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development",
        "MigrationHistoryTableName": "MigrationHistory",
        "ConnectionStringName": "EFConnectionString",
        "Redis__SSL": "True",
        "Redis__Port": "6380",
        "Redis__InstanceName": "RedisDev",
        "Redis__AbortConnect": "False",
        "Redis__ConnectionString": "{URI}:{Port},password={Password},ssl={SSL},abortConnect={AbortConnect}"
      },
      "applicationUrl": "http://localhost:4080/"
    },
    "UnitTesting": {
      "commandName": "Executable",
      "executablePath": "test",
      "environmentVariables": {
        "ASPNETCORE_ENVIRONMENT": "Development",
        "MigrationHistoryTableName": "MigrationHistory",
        "ConnectionStringName": "EFConnectionString",
        "Redis__SSL": "True",
        "Redis__Port": "6380",
        "Redis__InstanceName": "RedisDev",
        "Redis__AbortConnect": "False",
        "Redis__ConnectionString": "{URI}:{Port},password={Password},ssl={SSL},abortConnect={AbortConnect}"
      }
    }
  }
}

据我所知,默认情况下,git中会忽略launchSettings.json文件.我们将使用此文件的开发版本检入我们的代码,该文件将包含预期在开发环境中可用的设置示例.

谢谢你花时间阅读本文并提供帮助！

最佳答案 我现在写了这个静态加载器,但这并不理想：

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using Newtonsoft.Json;
using Newtonsoft.Json.Linq;

namespace MyNamespaceHere.Services.Common.Utilities
{
    public static class LaunchSettingsLoader
    {
        public static void LaunchSettingsFixture(string launchSettingsPath = "Properties\\launchSettings.json", string profileName = "UnitTesting")
        {
            using (var file = File.OpenText(launchSettingsPath))
            {
                var reader = new JsonTextReader(file);
                var jObject = JObject.Load(reader);

                var allprofiles = jObject
                    .GetValue("profiles", StringComparison.OrdinalIgnoreCase);

                // ideally we use this
                var variables = jObject
                    .GetValue("profiles", StringComparison.OrdinalIgnoreCase)
                    //select a proper profile here
                    .SelectMany(profiles => profiles.Children())
                    //.Where(p => p.Value<String> == profileName)
                    .SelectMany(profile => profile.Children<JProperty>())
                    .Where(prop => prop.Name == "environmentVariables")
                    .SelectMany(prop => prop.Value.Children<JProperty>())
                    .ToList();

                Console.WriteLine(variables?.Count);

                var profilesDictJToken = allprofiles.ToObject<Dictionary<string, JToken>>();
                var unitTestingProfile = profilesDictJToken[profileName];
                var unitTestingProfileDictJToken = unitTestingProfile.ToObject<Dictionary<string, JToken>>();
                var environmentVariables = unitTestingProfileDictJToken["environmentVariables"];
                var environmentVariablesList = environmentVariables.ToList();

                foreach (var variable in environmentVariablesList)
                {
                    var name = ((JProperty)variable).Name;
                    var value = ((JProperty)variable).Value.ToString();
                    Environment.SetEnvironmentVariable(name, value);
                }
            }
        }
    }
}
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