Angular（ng 测试）调试 - VS 代码不会在断点处停止

Question

I am currently having a problem. I started writing Tests for my Angular application and wanted to debug them. Now I've googled alot, I tried the recipies from microsoft ( https://github.com/Microsoft/vscode-recipes/tree/master/Angular-CLI ) and the closest I got to making it work was this BlogPost

http://blog.mlewandowski.com/Debugging-Karma-tests-with-VSCode.html

Now at least I can attach the Debugger to VS-Code. However VS Code does still not stop on Breakpoints, but the tests just continue to run. The Breakpoints in VS Code will also remain unverified (see image)

This is what I have so far (I only supply the parts i have changed, to not post too much code).

Any Ideas what I am doing wrong? Apart from that debbuging works just fine. I can debug my node.js applications and debugging ng serve also works fine.

launch.json

{
    "type": "chrome",
    "request": "attach",
    "name": "MyApp - Tests",
    "address": "localhost",
    "port": 9222,
    "pathMapping": {
        "/": "${workspaceRoot}",
        "/base/": "${workspaceRoot}"
    }
}

karma.conf.js

browsers: [
    'ChromeDebugging'
],

customLaunchers: {
    ChromeDebugging: {
        base: 'Chrome',
        flags: ['--remote-debugging-port=9222']
    }
}

Answer 1

Have you installed "Debugger for Chrome" extension.

Look at this guide. https://github.com/Microsoft/vscode-recipes/tree/master/Angular-CLI

UPDATE: This is my launch.json Maybe you can try it.

{
  "version": "0.2.0",
  "configurations": [
    {
      "name": "ng serve",
      "type": "chrome",
      "request": "launch",
      "url": "http://localhost:4200/#",
      "webRoot": "${workspaceFolder}"
    },
    {
      "name": "ng test",
      "type": "chrome",
      "request": "launch",
      "url": "http://localhost:9876/debug.html",
      "webRoot": "${workspaceFolder}"
    },
    {
      "name": "ng e2e",
      "type": "node",
      "request": "launch",
      "program": "${workspaceFolder}/node_modules/protractor/bin/protractor",
      "protocol": "inspector",
      "args": ["${workspaceFolder}/e2e/protractor.conf.js"]
    }
  ]
}

Karma conf

// Karma configuration file, see link for more information
// https://karma-runner.github.io/1.0/config/configuration-file.html

module.exports = function (config) {
  config.set({
    basePath: '',
    frameworks: ['jasmine', '@angular-devkit/build-angular'],
    plugins: [
      require('karma-jasmine'),
      require('karma-chrome-launcher'),
      require('karma-jasmine-html-reporter'),
      require('karma-coverage-istanbul-reporter'),
      require('@angular-devkit/build-angular/plugins/karma')
    ],
    client: {
      clearContext: false // leave Jasmine Spec Runner output visible in browser
    },
    coverageIstanbulReporter: {
      dir: require('path').join(__dirname, '../coverage'),
      reports: ['html', 'lcovonly'],
      fixWebpackSourcePaths: true
    },
    reporters: ['progress', 'kjhtml'],
    port: 9876,
    colors: true,
    logLevel: config.LOG_INFO,
    autoWatch: true,
    browsers: ['Chrome'],
    singleRun: false
  });
};

Answer 2

Try this configuration, it attaches to a running ng test process with the port definded in your karma.conf. If you have multiple browsers definde in your karma.conf, you might have to start ng test with ng test --browser=ChromeDebugging

{
        "name": "ng test",
        "type": "chrome",
        "request": "attach",
        "address": "localhost",
        "port": 9222,
        "webRoot": "${workspaceFolder}",
        "sourceMaps": true,
        "sourceMapPathOverrides": {
            "/./*": "${webRoot}/*",
            "/src/*": "${webRoot}/*",
            "/*": "*",
            "/./~/*": "${webRoot}/node_modules/*"
        }
}

Answer 3

Had this problem recently in VSCode & Intellij, it has to do with source map generation in Webpack that Angular CLi uses under the hood. I fixed the problem by setting evalSourceMap: "false" in angular.json, see the complete answer here https://stackoverflow.com/a/54883663/706012 .

Answer 4

Add 'pathMapping' to launch.json as below:

{
        "name": "ng test",
        "type": "chrome",
        "request": "launch",
        "url": "http://localhost:9876/debug.html",
        "webRoot": "${workspaceFolder}",
        "sourceMaps": true,
        "pathMapping": {
            "/_karma_webpack_": "${workspaceFolder}"
        },
        "sourceMapPathOverrides": {
            "webpack:/*": "${webRoot}/*",
            "/./*": "${webRoot}/*",
            "/src/*": "${webRoot}/*",
            "/*": "*",
            "/./~/*": "${webRoot}/node_modules/*"
        }
    }