unit-testing - 如何在 VS Code 中调试 dotnet 测试？

Question

This article描述设置 VS Code 设置以将调试目标指向单元测试项目的构建输出。因此，我将我的设置如下:

{
    "explorer.confirmDragAndDrop": false,
    "git.allowForcePush": true,
    "git.autofetch": true,
    "window.zoomLevel": 0,
    "csharp.unitTestDebuggingOptions": {
        "sourceFileMap": {
            "C:\\git\\MsTester\\bin\\Debug\\netcoreapp2.1": "C:\\git\\MsTester\\bin\\Debug\\netcoreapp2.1"
        }
    },
    "files.autoSave": "afterDelay",
    "files.exclude": {
        "**/bin": true,
        "**/node_modules": true,
        "**/obj": true
    },
    "csharpfixformat.style.spaces.insideEmptyBraces": false,
    "csharpfixformat.style.braces.allowInlines": false,
    "csharpfixformat.style.spaces.beforeParenthesis": false,
    "csharpfixformat.style.spaces.afterParenthesis": false,
    "csharp.format.enable": false,
    "extensions.ignoreRecommendations": true
}

但是，我不确定如何设置 launch.json开始 dotnet test以便它可以附加调试器。

这是我目前所拥有的:

{
    "version": "0.2.0",
    "configurations": [
        {
            "name": "MsTester",
            "type": "coreclr",
            "request": "launch",
            "preLaunchTask": "build",
            "program": "${workspaceFolder}/MsTester/bin/Debug/netcoreapp2.1/MsTester.dll",
            "windows": {
                "args": [
                    "--filter",
                    "TestCategory=lbshell",
                    "--logger",
                    "trx",
                    "--results-directory",
                    ".\\TestResults",
                    "--settings",
                    ".\\Features\\runsettings.xml"
                ],
            },
            "cwd": "${workspaceFolder}/MsTester",
            "console": "internalConsole",
            "stopAtEntry": false,
            "internalConsoleOptions": "openOnSessionStart"
        },
    ]
}

是否有选项告诉 VS Code 它需要执行 dotnet test而不是 dotnet run ?

我希望 this page将指示如何做到这一点，但它没有。

Answer 1

这可能无法解决您完全传递参数的问题，但可以解决将 runsettings 参数传递给正在调试的代码的问题。使用这种方法，我可以在运行调试器时将 runsettings 的内容传递给我的代码(即当我单击方法上方的“调试测试”时):



我最终做的是这样的:

首先，我编写了一些代码，这些代码将从设置文件中读取(通过 TestContext )或者如果 key 在设置文件中不可用，则从用户环境中读取，即:

[ClassInitialize]
public static void TestClassInitialize(TestContext context)
{
    v = Settings.GetSettingValueFromContextOrEnvironment("v", context);
}

这是 GetSettingValueFromContextOrEnvironment的实现:

/// <summary>
/// Attempts to read a setting value from the context (populated through runsettings). If the
/// key is not present in the context, the value will be read from the user environment variable
/// instead.
/// 
/// This allows running the unit test code in VSCode debugger that currently doesn't seem to allow
/// passing runsettings file to the DLL.
/// </summary>
/// <param name="name"></param>
/// <param name="context"></param>
/// <returns></returns>
public static String GetSettingValueFromContextOrEnvironment(string name, TestContext context){
    if (context.Properties.ContainsKey(name)){
        return context.Properties[name].ToString();
    } else {
        String envVar = Environment.GetEnvironmentVariable(name, System.EnvironmentVariableTarget.User);

        if (envVar == null){
            throw new Exception(String.Format("Environment variable '{0}' was not available neither in the context file nor in the environment.", name));
        } else {
            return envVar;
        }
    }
}

然后我编写了一个 Powershell，它将读取我的设置文件来解析参数并将它们设置为用户环境变量，如下所示:

<# This script updates user environment variables with parameters stored in *.runsettings file that is provided to it as the only argument on the command line.

Example usage:
    .\set_settings_env.ps1 local.runsettings
#>

param (
    [Parameter(Mandatory=$true)][string]$settings_file
)


[xml]$xml = Get-Content $settings_file
foreach( $parameter in $xml.RunSettings.TestRunParameters.Parameter) 
{
    write-host("Setting environment variable: " + $parameter.name)
    [Environment]::SetEnvironmentVariable($parameter.name, $parameter.value, "User")
}

因此，现在我既可以使用特定的 runsettings 文件从命令行运行代码，也可以通过运行脚本来设置环境变量进行调试。