Files
bun.sh/test/js/bun/resolve/json5/json5.test.js
Dylan Conway b59c77a6e7 feat: add native JSON5 parser (Bun.JSON5) (#26439)
## Summary

- Adds `Bun.JSON5.parse()` and `Bun.JSON5.stringify()` as built-in APIs
- Adds `.json5` file support in the module resolver and bundler
- Parser uses a scanner/parser split architecture with a labeled switch
pattern (like the YAML parser) — the scanner produces typed tokens, the
parser never touches source bytes directly
- 430+ tests covering the official JSON5 test suite, escape sequences,
numbers, comments, whitespace (including all Unicode whitespace types),
unquoted/reserved-word keys, unicode identifiers, deeply nested
structures, garbage input, error messages, and stringify behavior

<img width="659" height="610" alt="Screenshot 2026-01-25 at 12 19 57 AM"
src="https://github.com/user-attachments/assets/e300125a-f197-4cad-90ed-e867b6232a01"
/>

## Test plan

- [x] `bun bd test test/js/bun/json5/json5.test.ts` — 317 tests
- [x] `bun bd test test/js/bun/json5/json5-test-suite.test.ts` — 113
tests from the official JSON5 test suite
- [x] `bun bd test test/js/bun/resolve/json5/json5.test.js` — .json5
module resolution

closes #3175

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

---------

Co-authored-by: Claude <noreply@anthropic.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>
2026-01-26 10:52:35 -08:00

64 lines
1.3 KiB
JavaScript

import { expect, it } from "bun:test";
import emptyJson5 from "./json5-empty.json5";
import json5FromCustomTypeAttribute from "./json5-fixture.json5.txt" with { type: "json5" };
const expectedJson5Fixture = {
framework: "next",
bundle: {
packages: {
"@emotion/react": true,
},
},
array: [
{
entry_one: "one",
entry_two: "two",
},
{
entry_one: "three",
nested: [
{
entry_one: "four",
},
],
},
],
dev: {
one: {
two: {
three: 4,
},
},
foo: 123,
"foo.bar": "baz",
},
};
const expectedSmallFixture = {
framework: "next",
bundle: {
packages: {
"@emotion/react": true,
},
},
};
it("via dynamic import", async () => {
const json5 = (await import("./json5-fixture.json5")).default;
expect(json5).toEqual(expectedJson5Fixture);
});
it("via import type json5", () => {
expect(json5FromCustomTypeAttribute).toEqual(expectedSmallFixture);
});
it("via dynamic import with type attribute", async () => {
delete require.cache[require.resolve("./json5-fixture.json5.txt")];
const json5 = (await import("./json5-fixture.json5.txt", { with: { type: "json5" } })).default;
expect(json5).toEqual(expectedSmallFixture);
});
it("null value via import statement", () => {
expect(emptyJson5).toBe(null);
});