Error output is minified

Bắt đầu với test-config/karma.conf.js, test-config/webpack.test.js và test-config/karma-test-shim.js, sau đó chạy thiết lập kiểm thử Ionic để tái hiện đầu ra lỗi đã minify. Truy vết cách các source map của webpack và Karma preprocessor được cấu hình, đồng thời xác minh rằng các kiểm thử thất bại báo cáo vị trí mã nguồn có thể đọc được thay vì chỉ có karma-test-shim.js.

As recommended in the readme I have follow this tutorial to integrate tests to my Ionic Project. It works but when I have an error the code showed is minified and of course it is hard to know what is wrong.

For example:

Spec File

import { TestBed } from "@angular/core/testing";
import { StatisticsProvider } from "./statistics.service";

describe("StatisticsProvider", () => {
    let service: StatisticsProvider;

    beforeEach(() => {
        TestBed.configureTestingModule({
            providers: [StatisticsProvider]
        });
        service = TestBed.get(StatisticsProvider);
    });

    it("can load instance", () => {
        expect(service).toBeTruthy();
    });

});

Output Error:

Error: StaticInjectorError(e)[e -> e]:
StaticInjectorError(Platform: core)[e -> e]:
NullInjectorError: No provider for e!

error properties: Object({ ngTempTokenPath: null, ngTokenPath: [ 'e', Function ] })
Error: StaticInjectorError(e)[e -> e]: 
  StaticInjectorError(Platform: core)[e -> e]: 
    NullInjectorError: No provider for e!
    at e.get (http://localhost:9876/base/test-config/karma-test-shim.js:45:135)
    at http://localhost:9876/base/test-config/karma-test-shim.js:52:2430
    at le (http://localhost:9876/base/test-config/karma-test-shim.js:52:2448)
    at e.get (http://localhost:9876/base/test-config/karma-test-shim.js:52:1612)
    at http://localhost:9876/base/test-config/karma-test-shim.js:52:2430
    at le (http://localhost:9876/base/test-config/karma-test-shim.js:52:2448)
    at e.get (http://localhost:9876/base/test-config/karma-test-shim.js:52:1612)
    at oi (http://localhost:9876/base/test-config/karma-test-shim.js:298:681)
    at http://localhost:9876/base/test-config/karma-test-shim.js:298:869
    at si (http://localhost:9876/base/test-config/karma-test-shim.js:298:1053)
    at oi (http://localhost:9876/base/test-config/karma-test-shim.js:298:639)
    at e.get (http://localhost:9876/base/test-config/karma-test-shim.js:313:9035)
    at e.get (http://localhost:9876/base/test-config/karma-test-shim.js:471:6725)
    at Function.e.get (http://localhost:9876/base/test-config/karma-test-shim.js:471:2525)
    at UserContext.<anonymous> (http://localhost:9876/base/test-config/karma-test-shim.js:702:99461)
    at e.invoke (http://localhost:9876/base/test-config/karma-test-shim.js:514:7001)
    at e.onInvoke (http://localhost:9876/base/test-config/karma-test-shim.js:618:2261)
    at e.invoke (http://localhost:9876/base/test-config/karma-test-shim.js:514:6941)
    at t.run (http://localhost:9876/base/test-config/karma-test-shim.js:514:2171)
    at l (http://localhost:9876/base/test-config/karma-test-shim.js:656:1318)
    at UserContext.<anonymous> (http://localhost:9876/base/test-config/karma-test-shim.js:656:1428)
    at <Jasmine>
    at e.invokeTask (http://localhost:9876/base/test-config/karma-test-shim.js:514:7685)
    at t.runTask (http://localhost:9876/base/test-config/karma-test-shim.js:514:2865)
    at m (http://localhost:9876/base/test-config/karma-test-shim.js:514:9934)

./test-config/karma.conf.js

var webpackConfig = require('./webpack.test.js');

module.exports = function (config) {
    var _config = {
        basePath: '../',

        frameworks: ['jasmine'],

        files: [
            './test-config/ssd-refresh-debug.js',
            {
                pattern: './test-config/karma-test-shim.js',
                watched: true
            },
            {
                pattern: './src/assets/**/*',
                watched: false,
                included: false,
                served: true,
                nocache: false
            }
        ],

        proxies: {
            '/assets/': '/base/src/assets/'
        },

        preprocessors: {
            './test-config/karma-test-shim.js': ['webpack', 'sourcemap']
        },

        webpack: webpackConfig,

        webpackMiddleware: {
            stats: 'errors-only'
        },

        webpackServer: {
            noInfo: true
        },

        browserConsoleLogOptions: {
            level: 'log',
            format: '%b %T: %m',
            terminal: true
        },

        coverageIstanbulReporter: {
            reports: ['html', 'lcovonly'],
            fixWebpackSourcePaths: true
        },

        reporters: config.coverage ? ['kjhtml', 'dots', 'coverage-istanbul'] : ['kjhtml', 'dots'],
        port: 9876,
        colors: true,
        logLevel: config.LOG_INFO,
        autoWatch: true,
        browsers: ['Chrome'],
        singleRun: false,
    };

    config.set(_config);
};

./test-config/webpack.test.js

var webpack = require('webpack');
var path = require('path');

module.exports = {
  devtool: 'inline-source-map',

  resolve: {
    extensions: ['.ts', '.js']
  },

  module: {
    rules: [{
        test: /\.ts$/,
        loaders: [{
          loader: 'ts-loader'
        }, 'angular2-template-loader']
      },
      {
        test: /.+\.ts$/,
        exclude: /(index.ts|mocks.ts|\.spec\.ts$)/,
        loader: 'istanbul-instrumenter-loader',
        enforce: 'post',
        query: {
          esModules: true
        }
      },
      {
        test: /\.html$/,
        loader: 'html-loader?attrs=false'
      },
      {
        test: /\.(png|jpe?g|gif|svg|woff|woff2|ttf|eot|ico)$/,
        loader: 'null-loader'
      }
    ]
  },

  plugins: [
    new webpack.ContextReplacementPlugin(
      // The (\\|\/) piece accounts for path separators in *nix and Windows
      /(ionic-angular)|(angular(\\|\/)core(\\|\/)@angular)/,
      root('./src'), // location of your src
      {} // a map of your routes
    )
  ]
};

function root(localPath) {
  return path.resolve(__dirname, localPath);
}

./test-config/karma-test-shim.js

Error.stackTraceLimit = Infinity;

require('core-js/es6');
require('core-js/es7/reflect');

require('zone.js/dist/zone');
require('zone.js/dist/long-stack-trace-zone');
require('zone.js/dist/proxy');
require('zone.js/dist/sync-test');
require('zone.js/dist/jasmine-patch');
require('zone.js/dist/async-test');
require('zone.js/dist/fake-async-test');

var appContext = require.context('../src', true, /\.spec\.ts/);

appContext.keys().forEach(appContext);

var testing = require('@angular/core/testing');
var browser = require('@angular/platform-browser-dynamic/testing');

testing.TestBed.initTestEnvironment(browser.BrowserDynamicTestingModule, browser.platformBrowserDynamicTesting());