record more side effects

[markvanderloo]

Brody Gaslam gives a nice, non-exhaustive list of side effects that may be interesting while testing.

1. Workspace / Evaluation Environment
2. Random seed
3. Working directory
4. Search path
5. Global options
6. Loaded namespaces
7. System time
8. System variables
9. Locale

The ones that are crossed off are covered by tinytest already. besides that, tinytest keeps track of files created in the working directory. Note that 8 and 9 are covered by environment variables.

Changes in global options are not recorded but they are reset after a test file is run.

Interesting ones to add:

4. Search Path
5. Global options
6. Loaded namespaces

• Maybe open connections? Not sure if that is possible
• Maybe open devices/files? Idem