Improve extension api tests: run all tests, even if one fails

Improve extension api tests: run all tests, even if one fails

Currently, if a single file has multiple tests, a single failure will abort running the rest of the tests.

There's still no way to expect rather than assert, but I plan to add that next.

BUG=none
TEST=the tests all continue to pass, but if you edit one to make it fail, runAllTests will continue running later tests.

Committed: https://src.chromium.org/viewvc/chrome?view=rev&revision=141681

[Evan Stade, 2012-06-07 23:42:30]

not sure who the best reviewer is for this file.

I noticed another issue which was true before, and is still true. Doing
something sneaky like

  setTimeout(chrome.test.fail, 500);
  chrome.test.succeed();

can cause the wrong test to fail (i.e., whichever test is executing when the
callback runs). In practice you wouldn't do this intentionally but might do it
by accident: a synchronous failure followed by a failure in a callback. However
fixing this would be a bigger ordeal.

[Evan Stade, 2012-06-08 02:19:05]

this has broken some tests... hold off on reviewing till I fix it.

[Evan Stade, 2012-06-12 00:12:04]

ok, please review.

[Aaron Boodman, 2012-06-12 04:10:23]

Nice addition. LGTM.