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I have set up unit testing using Jasmine + Karma + Webpack for my Aurelia project. The project has 25 spec files (and around 385 test cases). However, when I am adding a new spec file, some of my old test cases which were working previously start failing. Only if I either delete the file or comment out the content of the file, the old behavior is restored.

From basic search on Google it seemed that I should increase maximumSpecCallbackDepth option for Jasmine. The test configuration is shown below. I am using following versions of dependencies:

"jasmine": "^3.3.0",
"karma": "^3.1.1",
"karma-chrome-launcher": "^2.2.0",
"karma-coverage-istanbul-reporter": "^2.0.4",
"karma-firefox-launcher": "^1.1.0",
"karma-jasmine": "^2.0.0",
"karma-jasmine-html-reporter": "^1.4.0",
"karma-mocha-reporter": "^2.2.5",
"karma-slimerjs-launcher": "^1.1.0",
"karma-sourcemap-loader": "^0.3.7",
"karma-tfs-reporter": "^1.0.1",
"karma-webpack": "^3.0.5",

Is there any way to correct it?

• 
  

  karma.conf.js

  
  
  

  'use strict';
  const path = require('path');
  const isDev = !!process.env.DEV;
  
  const reporters = ["mocha", "tfs", "coverage-istanbul"];
  if(isDev)
   reporters.push("kjhtml");
  
  const istanbulReporterConfig = 
   reports: isDev? ["html", "cobertura"]:["cobertura"],
   dir: path.resolve(__dirname, `coverage$isDev?"/%browser%":""`),
   fixWebpackSourcePaths: true,
   'report-config': 
   cobertura: 
   file: `$isDev?"../":""cobertura/coverage.xml`
   
   
  ;
  
  const testDir = path.resolve(__dirname, "tests");
  const webpackConfig; // see below for webpackConfig
  module.exports = function (config) 
   config.set(
   basePath: "./",
   frameworks: ['jasmine'],
   files: [ 
   pattern: "./node_modules/whatwg-fetch/fetch.js", watched:false,
   pattern: 'tests/karma-bundle.js', watched: false 
   ],
   preprocessors: 
   'tests/karma-bundle.js': ['webpack', 'sourcemap'] 
   , 
   webpack: webpackConfig,
   reporters: reporters,
   tfsReporter: 
   outputDir: "testresults",
   outputFile: 'testresults.xml'
   ,
   coverageIstanbulReporter: istanbulReporterConfig,
  
   client: 
   clearContext: false, 
   jasmine: 
   maximumSpecCallbackDepth: 5,
   random: true,
   seed: '28344',
   
   ,
   webpackServer: noInfo: true ,
   port: 9876,
   colors: true,
   logLevel: config.LOG_DEBUG,
   autoWatch: true,
   browsers: isDev? [ 'Chrome', 'Firefox'] : [ "SlimerJS" ],
   singleRun: !isDev,
   concurrency: Infinity,
   )
  
  

  
  


• 
  

  Webpack config

  
  
  

  const testDir = path.resolve(__dirname, "tests");
  const srcDir = path.resolve(__dirname, "src");
  const outDir = path.resolve(__dirname, "dist");
  const baseUrl = "/"
  const cssRules = [
   loader: "css-loader",
   options: 
   modules: true,
   importLoaders: 1,
   localIdentName: "[name]__[local]___[hash:base64:5]"
   
   ,
   
   loader: "postcss-loader",
   options: plugins: () => [ require("autoprefixer")( browsers: ["last 2 versions"] ) ] 
   
  ];
  
  const webpackConfig = 
   mode: "development",
   entry: app: ["aurelia-bootstrapper"] ,
   resolve: 
   extensions: [".ts", ".js"],
   modules: [srcDir, "node_modules", testDir],
   symlinks: false
   ,
   output: 
   path: outDir,
   publicPath: baseUrl,
   filename: "[name].[hash].js",
   sourceMapFilename: "[name].[hash].bundle.map",
   chunkFilename: "[name].[hash].js"
   ,
   devServer: 
   contentBase: outDir,
   historyApiFallback: true
   ,
   devtool: "inline-source-map",
   module: 
   rules: [
   test: /.css$/i, issuer: [ not: [ test: /.html$/i ] ], use: ["style-loader", ...cssRules] ,
   test: /.css$/i, issuer: [ test: /.html$/i ], use: [ "css-loader" ] ,
   test: /app.scss$/, loaders: ["style-loader", "css-loader", "sass-loader"] ,
   test: /.ts$/i, 
   use:[
   loader: "istanbul-instrumenter-loader" ,
   loader: "ts-loader", options: reportFiles: [ srcDir+'/**/*.ts'] 
   ], 
   include: srcDir ,
   test: /.ts$/i, loader: "ts-loader", include: testDir, options: reportFiles: [testDir+'/**/*.ts'] ,
   test: /.html$/i, loader: "html-loader" ,
   jpg, 
   test: /.woff2(?v=[0-9].[0-9].[0-9])?$/i, loader: "url-loader", options: limit: 10000, mimetype: "application/font-woff2" ,
   test: /.woff(?v=[0-9].[0-9].[0-9])?$/i, loader: "url-loader", options: limit: 10000, mimetype: "application/font-woff" , 
   test: /.(ttf,
   test: /[/\]node_modules[/\]bluebird[/\].+.js$/, loader: 'expose-loader?Promise' ,
   ]
   , 
   plugins: [
   new AureliaPlugin(aureliaApp: path.resolve(testDir, "./main")),
   new ModuleDependenciesPlugin( 'aurelia-testing': ['./compile-spy', './view-spy'] ),
   new ProvidePlugin( 
   'Promise': 'bluebird',
   $: "jquery",
   jQuery: "jquery",
   "window.jQuery": "jquery"
   )
   ]
  ;
  

  
  


• 
  

  karma-bundle.js

  
  
  

  import 'aurelia-polyfills';
  import 'aurelia-loader-webpack';
  
  Error.stackTraceLimit = Infinity;
  
  var testModuleContexts = loadTestModules();
  runTests(testModuleContexts);
  
  function loadTestModules() 
   var srcContext = require.context('../src', true, /.ts$/im);
   var testContext = require.context('./', true, /.spec.[tj]s$/im);
   return [srcContext, testContext];
  
  
  function runTests(contexts) 
   contexts.forEach(requireAllInContext);
  
  
  function requireAllInContext(requireContext) 
   return requireContext.keys().map(requireContext);