When files contain more than one snapshot, ./manage.py test --parallel causes a race condition

[rekahsoft]

When tests are run in parallel, snapshottest writes the resulting snapshot to a file based on the name of the python source file. For example, test_something.py results in snap_test_something.py. This however seems to lead to race conditions when a file contains more then one snapshot test and tests are run in parallel using ./manage.py test --parallel 4 which has different resulting snapshots then when running ./manage.py test.

[paulmelnikow]

As I mentioned in #107, I wonder if the fix might be to provide a way to pass this option through an environment variable, which subprocesses would then automatically inherit.

[paulmelnikow]

his however seems to lead to race conditions when a file contains more then one snapshot test and tests are run in parallel using ./manage.py test --parallel 4 which has different resulting snapshots then when running ./manage.py test.

Right, so this is the problem. It's not about passing the option through.

Hmm, I wonder if we could add an option where each snapshot is written to its own file. I think that's the only real way to solve this.

[zeroindex]

I'm curious if anything ever came of this. Is there a flag to get each snapshot into its own file?