Fix relative tolerance

[lilyminium]

Description

Fixes #592

Changes:

• changes which uncertainty is compared
• Adds tests of directly executing a Simulation graph, as well as with a server
• Adds test data from an example run
• Adds some helper functions to tests

Blocked by / follows #602.

Questions

• I've started adding test data from example runs -- this is helpful firstly in having an example of test data, and secondly for avoiding re-execution of workflows during tests. However there are a lot of files -- should these be compressed and uncompressed on-the-fly? Pros for compression are that the number of files changed is much lower. Cons is that the tarball may wind up being quite large (10+MB), and any changes to an individual file will change the entire compressed directory.

Status

• Ready to go

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 88.27%. Comparing base (3b38655) to head (1b1123e).

Additional details and impacted files