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wdio.conf.md

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The wdio.conf.js file is the main configuration file for visual regression tests on a project. Anything can be changed in here. Most of the configuration can be left at the defaults, but there are three sections that should be configured per-project.

  1. Update the baseUrl on line 10 to the site's local URL (No trailing slash). If you are running tests against production (or PR instances like multidevs) update the baseUrl on line 13 as well.
  2. The specs option is a globbing path to where your test files will live. Set this to whatever makes sense for your project. This must be relative to your package.json file.
  3. Update the capabilities array to reflect the OSs and Browsers your tests should be run against by default*.
  • Add/Remove options so that you're testing the browsers and versions that your project supports
  • project: This is used to identify/group your tests in BrowserStack

Everything else is configured to sensible defaults that shouldn't need to be updated unless specifically required.

Optionally update the misMatchTolerance

You may run into an issue where browsers rending things slightly different. e.g. Chrome on a Mac renders fonts slightly different than Chrome on Windows. So, if you're testing locally (with something like selenium instead of against browserstack) you might want to increase the misMatchTolerance from the default (0.01) to reduce false failures.

* If you want to run against a smaller set of browsers (or even just one) use something like the wdio.conf.quick.js file.