ReactiveX / rxjs / 5794

97%

Pull #3440

travis-ci

fix(config): make sure that Promise config is undefined initially

We need to make sure promise is undefined initially because systems like Zones need to have a chance to pick up Promise and patch it, and we're doing a runtime check for configuration anyhow. This makes the runtime check worthwhile and solves the problem with Zones (without needing to reference Zones in anyway)

1737 of 2113 branches covered (82.21%)

6434 of 6596 relevant lines covered (97.54%)

726.05 hits per line