Files
oxc-project__oxc/crates/oxc_react_compiler/fixtures/nested-optional-chains.ts
Boshen 6efce65746 test(react_compiler): snapshot the upstream fixture corpus (#24101)
## Summary

`oxc_react_compiler` had no committed test over the upstream React
Compiler fixture corpus — the fixtures lived only in the
`oxc-project/forked-react-compiler` checkout, exercised out-of-tree.
That gap let real regressions slip past the 15 in-crate integration
tests. This PR closes it.

- **`crates/oxc_react_compiler/fixtures/`** — 1734 fixture *input* files
(`.js`/`.ts`/`.tsx`/`.jsx`/`.mjs`), copied from the fork's
`babel-plugin-react-compiler/src/__tests__/fixtures/compiler` tree with
subdirectories preserved. Flow fixtures (the `@flow`-pragma ones) are
excluded — oxc has no Flow parser. The upstream `.expect.md` goldens are
also not copied; insta is the golden here.
- **`crates/oxc_react_compiler/tests/snapshot.rs`** — an `insta::glob!`
test that, per fixture, derives `PluginOptions`/`EnvironmentConfig` from
the first-line `// @directive` pragmas (base `compilationMode=all` /
`panicThreshold=all_errors`, matching the upstream `snap` runner),
parses → builds semantic → runs `transform`, and snapshots the compiled
output plus diagnostics. Unrecognised directives are ignored, as
upstream does; camelCase flag directives map to `EnvironmentConfig`
fields via `convert_case`.
- **`crates/oxc_react_compiler/tests/snapshots/`** — 1734 committed
`.snap` goldens (oxc's own output).
- **`.typos.toml`** — excludes the fixtures dir (the upstream fixtures
contain intentional typos; `**/*.snap` was already excluded).

These snapshots are oxc's own golden output, so `cargo test` (and CI)
now catches any change in compiler behaviour across the corpus.
Regenerate after an intended change with `cargo insta accept`.

## Verification

- `cargo test -p oxc_react_compiler` passes — the 1734-fixture snapshot
test plus the existing 15 integration tests; also green under
`--all-features` (matches the cross-target CI job).
- clippy `-D warnings`, `cargo fmt`, and `typos` clean.
- No fixture panics; 1336 compiled / 398 unchanged / 335 with
diagnostics.
- The `error.*` fixtures capture the exact diagnostics — including the
"Cannot reassign variable after render" error that a recent scoping
change had silently suppressed, confirming the suite catches real
regressions.

---

AI usage disclosure: authored with Claude Code and reviewed before
submission.

🤖 Generated with [Claude Code](https://claude.com/claude-code)
2026-07-03 16:49:53 +08:00

92 lines
2.1 KiB
TypeScript

import {identity} from 'shared-runtime';
/**
* identity(...)?.toString() is the outer optional, and prop?.value is the inner
* one.
* Note that prop?.
*/
function useFoo({
prop1,
prop2,
prop3,
prop4,
prop5,
prop6,
}: {
prop1: null | {value: number};
prop2: null | {inner: {value: number}};
prop3: null | {fn: (val: any) => NonNullable<object>};
prop4: null | {inner: {value: number}};
prop5: null | {fn: (val: any) => NonNullable<object>};
prop6: null | {inner: {value: number}};
}) {
// prop1?.value should be hoisted as the dependency of x
const x = identity(prop1?.value)?.toString();
// prop2?.inner.value should be hoisted as the dependency of y
const y = identity(prop2?.inner.value)?.toString();
// prop3 and prop4?.inner should be hoisted as the dependency of z
const z = prop3?.fn(prop4?.inner.value).toString();
// prop5 and prop6?.inner should be hoisted as the dependency of zz
const zz = prop5?.fn(prop6?.inner.value)?.toString();
return [x, y, z, zz];
}
export const FIXTURE_ENTRYPOINT = {
fn: useFoo,
params: [
{
prop1: null,
prop2: null,
prop3: null,
prop4: null,
prop5: null,
prop6: null,
},
],
sequentialRenders: [
{
prop1: null,
prop2: null,
prop3: null,
prop4: null,
prop5: null,
prop6: null,
},
{
prop1: {value: 2},
prop2: {inner: {value: 3}},
prop3: {fn: identity},
prop4: {inner: {value: 4}},
prop5: {fn: identity},
prop6: {inner: {value: 4}},
},
{
prop1: {value: 2},
prop2: {inner: {value: 3}},
prop3: {fn: identity},
prop4: {inner: {value: 4}},
prop5: {fn: identity},
prop6: {inner: {value: undefined}},
},
{
prop1: {value: 2},
prop2: {inner: {value: undefined}},
prop3: {fn: identity},
prop4: {inner: {value: undefined}},
prop5: {fn: identity},
prop6: {inner: {value: undefined}},
},
{
prop1: {value: 2},
prop2: {},
prop3: {fn: identity},
prop4: {},
prop5: {fn: identity},
prop6: {inner: {value: undefined}},
},
],
};