chore: import upstream snapshot with attribution

2026-07-13 12:39:17 +08:00
commit 4ed4e9ff99
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+# Tests
+
+Before running any tests, make sure you have `uv` installed (and ideally run `make sync` after).
+
+## Running tests
+
+```
+make tests
+```
+
+`make tests` runs the shard-safe suite in parallel and then runs tests marked `serial` in a separate serial pass.
+
+## Snapshots
+
+We use [inline-snapshots](https://15r10nk.github.io/inline-snapshot/latest/) for some tests. If your code adds new snapshot tests or breaks existing ones, you can fix/create them. After fixing/creating snapshots, run `make tests` again to verify the tests pass.
+
+### Fixing snapshots
+
+```
+make snapshots-fix
+```
+
+### Creating snapshots
+
+```
+make snapshots-create
+```