@Gregg’s answer was correct for the latest version of Jasmine at that time (v2.0.0).
However, since then, this new feature was added in v2.3.0:
Allow user to stop a specs execution when an expectation fails (Fixes #577)
It’s activated by adding throwFailures=true
to the query string of the runner page, eg:
http://localhost:8000/?throwFailures=true