如何设置黄瓜环境变量

Question

I am having the following package.json:

{
  "name": "newcucumber",
  "version": "1.0.0",
  "main": "index.js",
  "scripts": {
    "test": "./node_modules/.bin/cucumber-js",
    "firefox": "./node_modules/.bin/cucumber-js -- --profile.desktop.env.browser ff"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "chromedriver": "^2.24.1",
    "cucumber": "^1.3.0",
    "firefox-profile": "^0.4.2",
    "geckodriver": "^1.1.2",
    "phantomjs-prebuilt": "^2.1.12",
    "selenium-webdriver": "^3.0.0-beta-2"
  }
}

I run the program using:

npm test

I would like to set an environment variable for cucumber, such that I could run from the command line: npm test firefox or npm test phantomjs .

It could also be as a part of package.json 'scripts' as seen above, but I am not sure if I did it right. Invoking npm run-script firefox

How does one implement it, such that in the js code, like world.js or browser.js I grab the env variable?

Answer 1

Once more, now I have got the answer I wanted to use in the first place:

This is how part of package.json (MIND!!! the syntax of quotation marks) looks like:

"scripts": {
    "test": "cucumber-js",
    "firefox": "cucumber-js --world-parameters '{\"browser\":\"firefox\"}'",
    "chrome": "cucumber-js --world-parameters '{\"browser\":\"chrome\"}'",
    "safari": "cucumber-js --world-parameters '{\"browser\":\"safari\"}'",
    "phantomjs": "cucumber-js --world-parameters '{\"browser\":\"phantomjs\"}'"
  }

The JSON object is passed to World. In your World.js the code looks like this:

module.exports = function() {
  this.World = function(input) {
    console.log(input.browser); // Do whatever you want with the JSON (input) object
  };
};

Answer 2

You can do something like that when you want to define env vars. By the way, it is not mandatory to add the whole path, npm will figure it out

{
  "name": "newcucumber",
  "version": "1.0.0",
  "main": "index.js",
  "scripts": {
    "test": "cucumber-js",
    "firefox": "NODE_ENV=test cucumber-js -- --profile.desktop.env.browser ff"
  },
  "author": "",
  "license": "ISC",
  "dependencies": {
    "chromedriver": "^2.24.1",
    "cucumber": "^1.3.0",
    "firefox-profile": "^0.4.2",
    "geckodriver": "^1.1.2",
    "phantomjs-prebuilt": "^2.1.12",
    "selenium-webdriver": "^3.0.0-beta-2"
  }
}

Answer 3

I haven't tried it myself but, according to cucumber's CLI documentation, there's a way to pass data to the world constructor ( World parameters , by the end of the page)

You could pass the browser to the World constructor and let it create the webdriver instance according to your choice.

I guess the script part in your package.json could be (more or less) as follows:

"scripts": {
    "test": "cucumber-js",
    "firefox": "./node_modules/.bin/cucumber-js --world-parameters <JSON>"
  }

where <JSON> would contain the info. about the browser type, etc. Hope it helps.

Answer 4

I decided not to change something in node_modules or whatever, cause after the next npm update <package> the changes will be lost.

The Idea is to set the env variable:

1. Create a start.sh file in the directory where you call npm test from.

2. Write in start.sh :

    #!/bin/bash export BROWSER=$1 npm test 

3. Inside your browser.js or the file where you call your browsers type:

    var chrome = require('chromedriver'), phantom = require('phantomjs-prebuilt'), firefox = require('selenium-webdriver/firefox'), webdriver = require('selenium-webdriver'); ... console.log("What was passed into global env: ", process.env.BROWSER); switch(process.env.BROWSER) { case 'firefox': //Setup Firefox var capabilities = { 'browserName' : 'firefox' } break; case 'phantomjs': var capabilities = { 'browserName' : 'phantomjs' } break; case 'chrome': var capabilities = { 'browserName' : 'chrome' } break; } return browserHandle = new webdriver .Builder() .withCapabilities(capabilities) .build(); 

   4. Call . start.sh firefox (phantomjs, chrome) . start.sh firefox (phantomjs, chrome)

Answer 5

6axter82's solutions works for me...to some degree. In order to pass in variables from command line, I have to add following adjustments. (Environment: Windows 10 / VS Code / Command Prompt)

1. To execute from scripts property inside package.json, additional backslash () is needed.
   "firefox": "cucumber-js --world-parameters '{\\"browser\\":\\"firefox\\"}'",

   is converted into

   "firefox": "cucumber-js --world-parameters {\\\\\\"browser\\\\\\":\\\\\\"firefox\\\\\\"}"

2. (If default constructor is overridden by setWorldConstructor(World)) Create constructor for World as specified on Cucumber.js/World Doc , specifically

   function World({attach, parameters}) { this.attach = attach this.parameters = parameters }

3. To reference parameter values inside World class (world.js), use following expression this.parameters.browser

Hope this helps.