Karma Webpack（babel-loader）ES6“意外令牌导入”

/edit: I stripped the config completely to a minimum demonstrating the problem. I also uploaded a working project to GitHub that you can checkout, so you can see for yourself.

GitHub上有问题的用例：webpack-angular15-es6-karma（download 7z archive）

npm install
npm run build
npm run test

我知道有几个相关的问题，但世界变化如此之快，有很多因素/依赖关系，我无法用当前提出的解决方案解决这个问题 .

我有一个webpack配置来处理我的所有源代码，它工作得很好 .

为了进行测试，我重用该配置来处理一个加载源和测试文件的中央入口脚本 . 我找不到另一种方法将源代码中的模块导入我的测试代码进行测试 .

Karma builds fine reusing my webpack config, but the browser reports an error as soon as it is opened.

源代码使用ES6导入和webpack require语句 .

package.json:

npm run build >>> webpack --config webpack.config.js --display-error-details --colors --progress npm run test >>> karma start --single-run --no-auto-watch karma .config.js

{
  "name": "ProblemDemo",
  "scripts": {
    "build": "rimraf dist && webpack --config webpack.config.js --display-error-details --colors --progress",
    "test": "karma start --single-run --no-auto-watch karma.config.js"
  },
  "dependencies": {
    "angular": "^1.5.7",
    "angular-filter": "^0.5.8"
  },
  "devDependencies": {
      "webpack": "1.13.1",
      "html-loader": "0.4.3",
      "babel-loader": "5.3.2",
      "html-webpack-plugin": "1.6.1",
      "rimraf": "^2.5.3",
      "run-sequence": "1.1.2",
      "jasmine-core": "^2.4.1",
      "karma": "^0.13.19",
      "karma-chrome-launcher": "^0.2.2",
      "karma-coverage": "^0.5.3",
      "karma-jasmine": "^0.3.6",
      "karma-webpack": "^1.7.0",
      "loader-utils": "^0.2.12"
  }
}

karma.config.js:

module.exports = function (config) {
    config.set({
        browsers: ['Chrome'],
        coverageReporter: {
            reporters: [
                { type: 'html', subdir: 'html' },
                { type: 'lcovonly', subdir: '.' }
            ]
        },
        files: ['./tests.webpack.js'],
        frameworks: ['jasmine'],
        preprocessors: { './tests.webpack.js': ['webpack'] },
        reporters: ['progress', 'coverage'],
        webpack: configureWebpack()
    });

    function configureWebpack(webpackConfigFunction) {
        var webpackConfig = require('./webpack.config');
        webpackConfig.entry = undefined; // karma will pass the proper argument for entry
        return webpackConfig;
    }
};

正如你所看到的，我没有使用karma-babel插件：我不确定为什么我需要那些，看到我已经有一个带有import / require语句的代码的工作版本 .

test_entry.js:

var testsContext = require.context('./test', true, /\.js$/);
testsContext.keys().forEach(testsContext);

var srcContext = require.context('./app', true, /\.js$/);
srcContext.keys().forEach(srcContext);

webpack构建顺利成功（并发出预期文件大小的test_entry.js块），但随后Karma打开Chrome，一旦页面加载，我就会遇到以下错误：

Chrome 51.0.2704（Windows 7 0.0.0）错误未捕获的SyntaxError：在the_path / test_entry.js处发生意外的令牌：41

test_entry.js不包含import语句，无论如何它们应该被处理掉 . 出了什么问题？

如果你想知道webpack配置：

// webpack.config.js, works perfectly for normal builds but not with Karma
var path = require('path');
var webpack = require('webpack');
var HtmlWebpackPlugin = require('html-webpack-plugin');

module.exports = {
	debug: true,
	entry: {
		app: ['./app/index.js'],
		vendor: ['./app/vendor.js']
	},
	output: {
		path: path.join(__dirname, 'dist'),
		filename: 'js/[name].js'
	},
	plugins: [
		new HtmlWebpackPlugin({
			template: './app/index.html',
			inject: 'body',
			minify: false
		}),
		new webpack.optimize.CommonsChunkPlugin('vendor', 'js/vendor.js'),
		new webpack.SourceMapDevToolPlugin({
			filename: '[file].map',
			exclude: /vendor/
		})
	],
	resolve: {
		extensions: ['', '.js'],
		alias: {
			app: path.join(__dirname, 'app')
		}
	},
	module: {
		loaders: [
			{
				test: /\.js$/,
				loader: 'babel-loader',
				include: path.join(__dirname, 'app'),
				exclude: path.join(__dirname, 'node_modules')
			},
			{
				test: /\.html$/,
				loader: 'html-loader'
			}
		]
	},
	resolveLoader: {
		root: path.join(__dirname, 'node_modules')
	},
};

如果您想查看test_entry.js所需的测试，我无法运行该测试：

import jasmine from 'jasmine-core';
import readableNumberFilter from './file_path/readableNumber.filter';

// for some reason needed, or else unexpected token errors during build:
var describe = jasmine.describe;
var it = jasmine.it;
var expect = jasmine.expect;

describe('readableNumber Filter', function () {
	describe('readableNumber Filter formatting', () => {
		it('it should support optional arguments', function () {
			expect(readableNumberFilter("50.3")).toEqual("50,30");
		});
	});
});

edit 20-7-2016

问题仍然存在，更新的babel-loader依赖项（包括设置es2015预设选项） . “babel-core”：“^ 6.11.4”，“babel-loader”：“^ 6.2.4”，“babel-preset-es2015”：“^ 6.9.0”，