如何创建一个npm脚本来运行几个命令来运行一些测试? [英] How to create a npm script to run several commands to run some tests?

问题描述

当我为我的angularjs应用程序运行e2e测试时，我需要在不同的shell会话中运行以下命令:

When I run the e2e tests for my angularjs application, I need to run following commands in different shell session:

// start the selenium server
webdriver-manager start

// start a http server to serve current files
node_modules/http-server/bin/http-server .

// run the e2e tests
protractor test/protractor-conf.js

当我启动它们时，前两个命令将继续运行.

The first 2 commands will keep running when I start them.

我试图添加一个npm脚本来定义一个将它们一起运行的任务:

I tried to add a npm script to define a task to run them together:

"scripts" : {
    "e2e-test": "webdriver-manager start && node_modules/http-server/bin/http-server . && protractor test/protractor-conf.js"
}

问题是，当我通过以下方式运行它时:

The problem is, when I run it by:

npm run-script e2e-test

它只运行第一个并在那里阻塞，其他都没有运行的机会.

It just run the first one and blocking there, the other ones have no chance to run.

什么是最好的解决方案?

What's the best solution to do it?

推荐答案

问题是webdriver-manager start和您的http服务器需要作为守护程序运行，或在后台与&一起运行，如下所示:

Problem is that webdriver-manager start and your http-server need to run as daemons or in background with & like this:

"e2e-test": "(webdriver-manager start &) && sleep 2 && (node_modules/http-server/bin/http-server . &) && protractor test/protractor-conf.js"

还添加了一个sleep 2来等待硒服务器启动，您可以通过使用

阻止脚本来进行主动等待

Also added a sleep 2 to wait a bit for the selenium server to start, you could get fancy with an active wait by blocking the script with

while ! nc -z 127.0.0.1 4444; do sleep 1; done

在这种情况下，最好将所有"e2e-test" shell行提取到单独的脚本中，即

In which case you'd be better off by extracting all that "e2e-test" shell line into a separate script, i.e.

"e2e-test": "your-custom-script.sh"

然后your-custom-script.sh

#!/usr/bin/env bash

# Start selenium server just for this test run
(webdriver-manager start &)
# Wait for port 4444 to be listening connections
while ! nc -z 127.0.0.1 4444; do sleep 1; done

# Start the web app
(node_modules/http-server/bin/http-server . &)
# Guessing your http-server listen at port 80
while ! nc -z 127.0.0.1 80; do sleep 1; done

# Finally run protractor
protractor test/protractor-conf.js

# Cleanup webdriver-manager and http-server processes
fuser -k -n tcp 4444
fuser -k -n tcp 80

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