robobun 5965ff18ea fix(test): fix assertion failure in expect.extend with non-JSFunction callables (#25099) ...

## Summary

- Fix debug assertion failure in `JSWrappingFunction` when
`expect.extend()` is called with objects containing non-`JSFunction`
callables
- The crash occurred because `jsCast<JSFunction*>` was used, which
asserts the value inherits from `JSFunction`, but callable class
constructors (like `Expect`) inherit from `InternalFunction` instead

## Changes

- Change `JSWrappingFunction` to store `JSObject*` instead of
`JSFunction*`
- Use `jsDynamicCast` instead of `jsCast` in `getWrappedFunction`
- Use `getObject()` instead of `jsCast` in `create()`

## Reproduction

```js
const jest = Bun.jest();
jest.expect.extend(jest);
```

Before fix (debug build):
```
ASSERTION FAILED: !from || from->JSCell::inherits(std::remove_pointer<To>::type::info())
JSCast.h(40) : To JSC::jsCast(From *) [To = JSC::JSFunction *, From = JSC::JSCell]
```

After fix: Properly throws `TypeError: expect.extend: 'jest' is not a
valid matcher`

## Test plan

- [x] Added regression test
`test/regression/issue/fuzzer-ENG-22942.test.ts`
- [x] Existing `expect-extend.test.js` tests pass (27 tests)
- [x] Build succeeds

Fixes ENG-22942

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-authored-by: Claude Bot <claude-bot@bun.sh>
Co-authored-by: Claude <noreply@anthropic.com>

2025-11-26 13:34:02 -08:00

..

fixtures

Fix request.url having incorrect port

2023-10-16 15:14:15 -07:00

issue

fix(test): fix assertion failure in expect.extend with non-JSFunction callables (#25099)

2025-11-26 13:34:02 -08:00

issue23966.test.ts

Fix Buffer.isEncoding('') to return false (#23968)

2025-10-22 16:15:29 -07:00