将黄瓜框架从2.4升级到4.0并遇到问题：
Start Test Suite [ 2019-02-14 13:15:40 -0800 ]
Selenium standalone isn't running. Starting standalone server in background.
Determining host operating system... darwin18.2.0
Determining host operating system... darwin18.2.0
cannot load such file -- cucumber/core/gherkin/tag_expression (LoadError)
SITE_TYPE: desktop DEBUG_MODE: false SELENIUM_ENV: local SELENIUM BROWSER: firefox RERUN_TEST: false
quitting browser
End Test Suite [ 2019-02-14 13:15:42 -0800 ]
无论有没有标签，都无法启动任何测试，如果有人可以分享一些有关如何调试它的想法，将不胜感激？
答案 0 :(得分：1)
// These are important and needed before anything else
import 'zone.js/dist/zone-node';
import 'reflect-metadata';
import { enableProdMode } from '@angular/core';
import { ngExpressEngine } from '@nguniversal/express-engine';
import * as express from 'express';
import { join } from 'path';
const DIST_FOLDER = join(process.cwd(), 'dist');
// Faster server renders w/ Prod mode (dev mode never needed)
enableProdMode();
const domino = require('domino');
const fs = require('fs');
const path = require('path');
const template = fs.readFileSync(join(DIST_FOLDER, 'browser', 'index.html')).toString();
const win = domino.createWindow(template);
global['window'] = win;
global['document'] = win.document;
global['DOMTokenList'] = win.DOMTokenList;
global['Node'] = win.Node;
global['Text'] = win.Text;
global['HTMLElement'] = win.HTMLElement;
global['navigator'] = win.navigator;
global['CSS'] = null;
global['Event'] = win.Event;
global['Event']['prototype'] = win.Event.prototype;
Object.defineProperty(win.document.body.style, 'transform', {
value: () => {
return {
enumerable: true,
configurable: true
};
},
});
// Express server
const app = express();
const PORT = process.env.PORT || 4000;
const { AppServerModuleNgFactory, LAZY_MODULE_MAP } = require('./dist/server/main');
const { provideModuleMap } = require('@nguniversal/module-map-ngfactory-loader');
app.engine('html', ngExpressEngine({
bootstrap: AppServerModuleNgFactory,
providers: [
provideModuleMap(LAZY_MODULE_MAP)
]
}));
app.set('view engine', 'html');
app.set('views', join(DIST_FOLDER, 'browser'));
// Server static files from /browser
app.get('*.*', express.static(join(DIST_FOLDER, 'browser')));
// All regular routes use the Universal engine
app.get('*', (req, res) => {
res.render('index', { req });
});
// Start up the Node server
app.listen(PORT, () => {
console.log(`Node server listening on http://localhost:${PORT}`);
});
被移动到另一个宝石：cucumber-tag_expressions，如here所述。根据代码中引发此错误的位置，您可能需要更改引发错误的const path = require('path');
const webpack = require('webpack');
module.exports = {
entry: { server: './server.ts' },
resolve: { extensions: ['.js', '.ts'] },
target: 'node',
mode: 'none',
// this makes sure we includes node_modules and other 3rd party libraries
externals: [/(node_modules|main(\\|\/)..*(\\|\/).js)/],
output: {
path: path.join(__dirname, 'dist'),
filename: '[name].js'
},
module: {
rules: [
{ test: /\.ts$/, loader: 'ts-loader' },
{
// Mark files inside `@angular/core` as using SystemJS style dynamic imports.
// Removing this will cause deprecation warnings to appear.
test: /(\\|\/)@angular(\\|\/)core(\\|\/).+\.js$/,
parser: { system: true },
},
]
},
plugins: [
// Temporary Fix for issue: https://github.com/angular/angular/issues/11580
// for 'WARNING Critical dependency: the request of a dependency is an expression'
new webpack.ContextReplacementPlugin(
/(.+)?angular(\\|\/)core(.+)?/,
path.join(__dirname, 'src'), // location of your src
{} // a map of your routes
),
new webpack.ContextReplacementPlugin(
/(.+)?express(\\|\/)(.+)?/,
path.join(__dirname, 'src'),
{}
),
new webpack.ProvidePlugin({
$: "jquery",
jQuery: "jquery",
"window.jQuery": "jquery"
})
]
};
，或者可能只需要安装gem。
我注意到的另一件事是Cucumber 4.0仍处于RC（发行候选版本）中，尚未稳定，因此您可能要恢复到最新的稳定版本，即今天的3.1.2，这可能会解决问题。