Jon Ross-Perkins 100a4f038d Update tests of alias for ranges, splits, and min_prelude (#5455) ...

Doing a few things here, to sound people out on a broader test cleanup:

1. Adding `--dump-sem-ir-ranges=<value>` to all files.
- The default is currently `if-present`. I'd like to change the default
to `only` in tests. Always setting it both makes it clear which tests
have been looked at as part of cleanup, and makes changing the default a
simpler "remove" action (versus "find changed tests and add lines").
- I'm only using `if-present` in import tests; ranges would hide
imported instructions, but I think the imported instructions are more
relevant in those.
2. Removing `--no-dump-sem-ir` uses.
- `--dump-sem-ir-ranges=only` has similar results to `--no-dump-sem-ir`,
so this is partly consolidating.
- Relying on the "only" value allows for easier combining of test files
into splits.
3. Evaluating where splits may be used.
    - Historically, we had to have each test be an individual file.
4. Preferring files with a split named `fail_` over files that use the
default name.
- I think this makes test files a little more consistently named, and
should ease the path if people want to add more split tests (vs pushing
people towards adding files).
- But I can switch back for single-split tests if the leaning is more
that we shouldn't repeat.

Specific to an `alias`, significant notes:

1. Consolidates several tests into a `basics.carbon` test.
- In there, adds a simple alias test; I didn't immediately see a trivial
test like that.
2. The "aliased_name_in_diag" test was no longer testing what it was
supposed to; however, there's "preserve_in_type_printing" so I'm
removing it as duplicative (vs switching to a min_prelude test).
3. Moves out a control flow test that didn't appear related to `alias`.

2025-05-16 23:22:10 +00:00

..

local.carbon

Update tests of alias for ranges, splits, and min_prelude (#5455)

2025-05-16 23:22:10 +00:00