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Created June 22, 2020 19:04
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mochitest instructions
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README.md

Cross-origin mochitests

Cross-origin (or "xorigin") mode allows for mochitests to be run in a cross origin iframe. Used in conjunction with fission mode, xorigin mode can be used validate site isolation in Firefox.

When cross-origin mode is enabled, the toplevel window runs at "http://mochi.xorigin-test:8888" and individual mochitests are loaded in a cross origin iframe running at "http://mochi.test:8888".

Enabling cross-origin mode

Xorigin mode can be enabled by a flag or environment variable:

./mach mochitest --enable-xorigin-tests [path to test]

 MOZ_XORIGIN_MOCHITEST=1 ./mach mochitest [path to test]

Failing or hanging tests should be annotated at the manifest level using the "xorigin" keyword, for example:

skip-if = xorigin
fail-if = xorigin

Running cross-origin mochitests in Treeherder

TODO

  • currently supported for mochitest-plain jobs
  • will enable on tier2 to start
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