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I care a lot about being able to automatically check _any_ property about my
program before it ever runs. However, some things don't have tests yet, either
because I don't know how to test them or because I've been lazy. I'll at least
record those here.
* Initializing settings:
- from previous session
- Filename as absolute path
- Filename as relative path
- from defaults
### Other compromises
Lua is dynamically typed. Tests can't patch over lack of type-checking.
* All strings are UTF-8. Bytes within them are not characters. I try to label
byte offsets with the suffix `_offset`, and character positions as `_pos`.
For example, `string.sub` should never use a `_pos` to substring, only an
`_offset`.
* Some ADT/interface support would be helpful in keeping per-line state in
sync. Any change to line data should clear line `fragments` and
`screen_line_starting_pos`.
* Some inputs get processed in love.textinput and some in love.keypressed.
Several bugs have arisen due to destructive interference between the two for
some key chord. I wish I could guarantee that the two sets are disjoint. But
perhaps I'm not thinking about this right.
* Like any high-level language, it's easy to accidentally alias two non-scalar
variables. I wish there was a way to require copy when assigning.
* My test harness automatically runs `test_*` methods -- but only at the
top-level. I wish there was a way to raise warnings if someone defines such
a function inside a dict somewhere.
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