46 lines
2.6 KiB
Markdown
46 lines
2.6 KiB
Markdown
I care a lot about being able to automatically check _any_ property about my
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program before it ever runs. However, some things don't have tests yet, either
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because I don't know how to test them or because I've been lazy. I'll at least
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record those here.
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* Initializing settings:
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- delete app settings, start with a filename; window opens with cursor at top of file
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- run with absolute file path; quit; restart; window opens in same position+dimensions
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- run with relative file path; quit; switch to new directory; restart without a filename; window opens running the same file in same position+dimensions
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- run with a filename on commandline, scroll around, quit; restart without a filename; window opens in same position+dimensions
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- run with a filename on commandline, scroll around, quit; restart with same filename; window opens in same position+dimensions
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- run with a filename on commandline, scroll around, quit; restart with new filename; window opens new filename with cursor up top
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- run editor, scroll around, move cursor to end of some line, quit; restart with new filename; window opens in same position+dimensions
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* How the screen looks. Our tests use a level of indirection to check text and
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graphics printed to screen, but not the precise pixels they translate to.
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- where exactly the cursor is drawn to highlight a given character
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- analogously, how a shape precisely looks as you draw it
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### Other compromises
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Lua is dynamically typed. Tests can't patch over lack of type-checking.
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* All strings are UTF-8. Bytes within them are not characters. I try to label
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byte offsets with the suffix `_offset`, and character positions as `_pos`.
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For example, `string.sub` should never use a `_pos`, only an `_offset`.
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* Some ADT/interface support would be helpful in keeping per-line state in
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sync. Any change to line data should clear line `fragments` and
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`screen_line_starting_pos`.
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* Some inputs get processed in love.textinput and some in love.keypressed.
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Several bugs have arisen due to destructive interference between the two for
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some key chord. I wish I could guarantee that the two sets are disjoint. But
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perhaps I'm not thinking about this right.
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* Like any high-level language, it's easy to accidentally alias two non-scalar
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variables. I wish there was a way to require copy when assigning.
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* I wish I could require pixel coordinates to be integers. The editor
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defensively converts input margins to integers.
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* My test harness automatically runs `test_*` methods -- but only at the
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top-level. I wish there was a way to raise warnings if someone defines such
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a function inside a dict somewhere.
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