Chris Bracken b45a260534
Make FakeGenSnapshot's outputs mutable for tests (#16976)
This simplifies tests by allowing the test author to express the outputs
they'd like the snapshotter to generate without creating a whole new
instance and context with the additional overrides.

Also sets the default set of outputs to none, setting them instead in
the setUp function for script snapshotting.
2018-04-25 20:50:33 -07:00
..