... cypress run --browser chrome. It is possible to do it on your own with Docker images, but this involves additional effort. cypress-open-from-docker-compose which is a fork of mtlynch/hello-world-cypress; To support both cypress run and cypress open settings we recommend: placing the default settings for cypress run into docker-compose.yml file, for example, like this You can use this flag to run only run some tests, if you don’t want to run all of them. Once you have a test up and running, you can try running it headlessly in Chrome by using this command: cypress run --headless --browser chrome. Headless – both tools support headless Chrome. Instead of calling open command, we can start run command which runs Cypress in headless Chrome additionally recording the whole process to mp4 file. As seen in the chart below, the test executed with Selenium WebDriver and Java had the fastest execution time in the Headless Chrome category. To learn how to install and run it, I used this awesome tutorial by Nick Chikovani. To launch Chrome Canary, run cypress run --browser chrome:canary. Do keep in mind, location of spec is from cypress generated folder. # work locally git add . npm run cypress to open Cypress in the interactive mode, where we can choose which tests to run in which browser; npm run cypress:headless to run all tests using headless Chrome. Puppeteer is a node.js library that works specifically with Chrome. git commit -m "feature A + tests" git push # CI runs all tests on each commit cypress run. To prevent the Cypress Test Runner from exiting after running tests in a spec file, use --no-exit. spec. config-file. You can pass --headed --no-exit in order to view the command log or have access to developer tools after a spec has run. Currently, Cypress team is working on developing parallel execution, so this will happen soon. Cypress vs. … ... uses headless Electron (old version) cypress run --headed. npx cypress run --headless --browser chrome Another scenario where Docker has helped us is with visual testing. cypress run --headless --browser chrome cypress run --no-exit. test script would do the following: a. run your test suite b. create 'mocha' folder under 'cypress/reports' c. create .json files (one for each spec executed) in the 'mocha' folder Running on Azure DevOps is almost as easy as running it locally. If you want to run Chrome heedlessly, you will need to pass the –headless argument to cypress run. Cypress was far behind and seems to be lacking headless support (as also seen in the Headless Firefox category below). When you want to run the tests from the command line, you can use the –browser flag. To launch chromium, run cypress run --browser chromium. cypress run --spec folder/test.spec.js. Configuration … To run Cypress, you do not need a special Azure DevOps agent. As in the above snippet, we can see under the Run Starting section that Chrome 80 browser ran the tests instead of Electron. pretest script would create the report folders and clear them if they already exist. Running on Azure DevOps. As we are currently doing visual tests to support one team that we are working with, we are experiencing an issue where the baseline and test images always have a lot of mismatch. Execution Time on Headless Chrome per Framework. Cypress currently does not support parallel execution. Example: cypress run --browser chrome. Very useful in Continuous Integration scenarios and available out of the box. Last but not least of the goodies we get with Cypress I’d like to mention here is the headless mode. Below is a snippet of how the run from Command Line looks like, which also shows you the browser like Chrome, which had a mention in Cypress run command. cypress run --headless --browser chrome. 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