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* Exit cleanly after invalid screenshot test name This avoids waiting forever. * Auto-detect host IP in Docker for Mac environment This checks all available network addresses to find one which the Selenium container can connect to. That way we don't have to analyze network settings or similar to figure out the main public IP address of the machine. * Make server less sensitive to current working directory That way it becomes possible to run screenshotter.js from within the Screenshotter directory, and still server all files as intended.
How to generate screenshotter images
Automatic generation of screen shots
Now you too can generate screenshots from your own computer, and (hopefully)
have them look mostly the same as the current ones! Make sure you have docker
installed and running.
If all you want is (re)create
all the snapshots for all the browsers, then you can do so by running the
screenshotter.sh script:
dockers/Screenshotter/screenshotter.sh
It will fetch all required selenium docker images, and use them to take screenshots.
Manual generation
If you are creating screenshots on a regular basis, you can keep the
docker containers with the selenium setups running. Essentially you
are encouraged to reproduce the steps from screenshotter.sh
manually. Example run for Firefox:
container=$(docker run -d -P selenium/standalone-firefox:2.46.0)
node dockers/Screenshotter/screenshotter.js -b firefox -c ${container}
# possibly repeat the above command as often as you need, then eventually
docker stop ${container}
docker rm ${container}
For Chrome, simply replace both occurrences of firefox with chrome.
Use without docker
It is possible to run screenshotter.js without the use of Docker:
npm install selenium-webdriver
node dockers/Screenshotter/screenshotter.js
This will generate screenshots using the Firefox installed on your system.
Browsers other than Firefox can be targeted using the --browser option.
For a complete list of options pass --help as an argument to
screenshotter.js. Using these it should be possible to have the script
connect to almost any Selenium web driver you might have access to.
Note that screenshots taken without Docker are very likely to disagree from the ones stored in the repository, due to different versions of various software components being used. The screenshots taken in this fashion are well suited for visual inspection, but for exact binary comparisons it would be neccessary to carefully set up the environment to match the one used by the Docker approach.
Choosing the list of test cases
Both screenshotter.js and screenshotter.sh will accept
an --include option (short -i) which can be used to specify
a list of test cases to be processed, as a comma separated list.
Conversely, the --exclude option (short -x) can be used
to specify a list of cases which are not being processed.
Examples:
node dockers/Screenshotter/screenshotter.js -i Sqrt,SqrtRoot
dockers/Screenshotter/screenshotter.sh --exclude=GreekLetters