./mach xpcshell-test toolkit/components/extensions/test/xpcshell/test_ext_contentscript_context.js Produces a lot of: JavaScript error: resource://testing-common/ContentTask.jsm, line 116: TypeError: ContentTask._testScope.record is not a function

Thanks for filing! It looks like for ContentTask running in xpc-shell tests, the "testScope" available is the Assert class from Assert.jsm and is not coming from browser-test.js Inaccurate comment in ContentTask.jsm: https://searchfox.org/mozilla-central/rev/6e0e603f4852b8e571e5b8ae133e772b18b6016e/testing/mochitest/BrowserTestUtils/ContentTask.jsm#38-39 Copy Assert.jsm methods in xpcshell test scope: https://searchfox.org/mozilla-central/rev/6e0e603f4852b8e571e5b8ae133e772b18b6016e/testing/xpcshell/head.js#513 The interesting thing is that todo and todo_is are also not available in this scope, so the following lines will fail in xpcshell tests: https://searchfox.org/mozilla-central/rev/6e0e603f4852b8e571e5b8ae133e772b18b6016e/testing/mochitest/BrowserTestUtils/ContentTask.jsm#119-123

Julian, do you want to take this?

I wrote my comment before seeing your patch (thanks for working on it), but I'm fine with landing this to fix the issue. I think we should have a follow-up to clarify what can be "testScope" in ContentTask.jsm, but that can wait. So if Mark is ok with your patch we should land it.

I've posted a followup, bug 1506134.

Pushed by mixedpuppy@gmail.com: https://hg.mozilla.org/integration/autoland/rev/00c7004a24da add record to xpcshell tests for use in extension tests, r=Standard8