我希望测试我的用TypeScript编写的Express应用程序。 基本上,我使用Jasmine(编写测试用例),Webpack(将TS打包为JS)和Karma(测试运行器)。
请查找这些文件。
// about.service.ts - code to be tested
import { MongoClient, MongoError, Collection, ObjectId } from 'mongodb';
export class AboutService { // functionality }
// about.service.spec.ts - test cases
import { AboutService} from 'about.service.ts';
describe('services.about.service.spec', () => {
it('should_return_null_date', () => {
// test cases here
});
});
// karma.conf.js - karma configuration file
var webpackConfig = require('./karma.webpack');
module.exports = function (config) {
config.set({
frameworks: ['jasmine'],
plugins: [
require('karma-jasmine'),
require('karma-chrome-launcher'),
require('karma-jasmine-html-reporter'),
require('karma-webpack')
],
files: [
'somefiles'
],
mime: {
'text/x-typescript': ['ts']
},
preprocessors: {
'somefiles': ['webpack']
},
webpack: webpackConfig,
reporters: ['kjhtml'],
browsers: ['Chrome'],
client: {
clearContext: false,
captureConsole: false
},
port: 9876,
colors: true,
logLevel: config.LOG_WARN,
autoWatch: true,
singleRun: false,
concurrency: Infinity
});
}
// karma.webpack.js
var nodeExternals = require('webpack-node-externals');
module.exports = {
resolve: { extensions: ['.ts', '.js'], },
module: {
rules: [{
test: /\.ts$/,
use: ['awesome-typescript-loader']
}]
},
target: "node",
externals: [nodeExternals()]
}
Webpack编译成功了,但当Karma在Chrome中启动时,它却显示“require('mongodb')未找到”,我猜测在浏览器中不支持require。
我想知道如何在Node环境中运行测试,而不是在浏览器中?是否有任何karma加载程序可用?我想要在jasmine中编写测试,并且我需要Webpack将ts转换为js。我想要一个类似于karma的测试运行程序,可以在Node中运行而不是在浏览器中?
非常感谢您的帮助。