guzzle/cache-subscriber — pull request #30 by deviantintegral (2014-12-10 20:47:51+00:00)
Title: Adds tests for stale-if-error behaviour.

This also fixes:
* Adding duplicate headers on stale responses that are handled in
onComplete.
* Overwriting an event variable with an exception.
* can_cache test assuming can_cache works in error conditions.