Docker-Compose
Docker is the trending tool in the recent days which allows us to run multiple lightweight containers to perform various task. Just in case, you haven’t got docker please refer my previous post ‘Guide to Docker ToolBox‘ to start Docker from scratch.
Docker-compose is a way of managing multiple containers to perform specific tasks. It allows us to create ‘docker-compose.yml’ file with our container requirements. You can install docker-compose in with PIP with single command.
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$ pip install docker-compose |
In this short post, we will setup Ruby-Cucumber to run scenarios in the multiple browses. We will execute it in PhantomJS based Poltergeist driver.
Docker-Compose Cucumber
We will consider two basic scenarios here.
- You have existing cucumber framework setup
- You have to start from scratch
Existing Cucumber Framework
Assuming, you have created Dockerfile & profile for those browsers and registered drivers. This also assumes that you have docker image provisioned with specific webdriver drivers e.g firefox-driver, chrome-driver etc
You can create a docker-compose.yml fie which looks like this :
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cucumber-phantomjs: build: . command: bundle exec cucumber -p phantomjs volumes: - .:/myapp ports: - "4777:4777" cucumber-chome: build: . command: bundle exec cucumber -p chrome volumes: - .:/myapp |
This will allow us to setup multiple browsers in our cucumber.
Start from Scratch
I have created little project on Github to start with Docker-Compose with Cucumber.
https://github.com/Shashikant86/docker-compose-cucumber
You can clone this repo and use it directly.
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$ git clone https://github.com/Shashikant86/docker-compose-cucumber $ cd docker-compose-cucumber |
You have all the setup ready.
Configuring Docker-Compose File
Now have a look at ‘docker-compose.yml’ file. It has phantomjs and chrome profile. You can update file according to the browser and cloud testing services you use like Saucelabs, Testingbot and Browserstack.
- Using With PhantomJS
You can use headless browser PhantomJS with Poltergeist driver.
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cucumber-phantomjs: build: . command: bundle exec rake parallel_cucumber volumes: - .:/myapp ports: - "4777:4777" |
- Using with Chrome
You have to make sure, Docker image has chrome and chrome-driver installed.
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cucumber-chome: build: . command: bundle exec rake chrome volumes: - .:/myapp |
You can also use other drivers as well if you have Saucelabs, Browserstack Key setup in the ‘features/support/env.rb’ file.
Now run Docker Compose
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$ docker-compose up |
This will build and run cucumber scenarios in the different containers with different browsers.
You can see above two containers has been launched, one for phantomJS and other for chrome.
Video Demo
- Installing Docker Toolbox
- Docker-Compose Cucumber Cross Browser