Dmitry Gozman bb34d7a953
fix(test-runner): sanitize snapshot name before constructing a path (#7620)
This avoids problems with `toMatchSnapshot('../../dir/file.png')`
where we append this path to `snapshotDir` and end up in some random
place.

Also added a note to documentation.
2021-07-14 16:31:19 -07:00
..