add boundary workout testing

Write a lot of boundary value tests. And then try to merge into the fork, so I had to revert some merge conflict fixes.

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added 2 commits

• 2aaad23c - 1 commit from branch master
• 3941f3c2 - Merge branch 'master' into 'boundary-tests'

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added 1 commit

• bdafdacb - re-add tests

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merged

mentioned in commit e86c0be8