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TypeScript
123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384858687888990919293949596979899100101102103104105106107108109110111112113114115116117118119120121122123124125126127128129130131132133134135136137138139140141142143144145146147148149150151152153154155156157158159160161162163164165166167168169170171172173174175176177178179180181182183184185186187188189190191192193194195196197198199200201202203204205206207208209210211212213214215216217218219220221222223224225226227228229230231232233234235236/* * Portions adapted from Test262 at revision 250f204f23a9249ff204be2baec29600faae7b75: * - test/built-ins/JSON/parse/reviver-call-order.js * - test/built-ins/JSON/parse/reviver-call-err.js * - test/built-ins/JSON/stringify/replacer-array-duplicates.js * - test/built-ins/JSON/stringify/replacer-array-empty.js * - test/built-ins/JSON/stringify/replacer-array-number.js * - test/built-ins/JSON/stringify/replacer-array-order.js * - test/built-ins/JSON/stringify/replacer-array-undefined.js * - test/built-ins/JSON/stringify/replacer-array-wrong-type.js * - test/built-ins/JSON/stringify/replacer-function-abrupt.js * - test/built-ins/JSON/stringify/replacer-function-arguments.js * - test/built-ins/JSON/stringify/replacer-function-array-circular.js * - test/built-ins/JSON/stringify/replacer-function-object-deleted-property.js * - test/built-ins/JSON/stringify/replacer-function-object-circular.js * - test/built-ins/JSON/stringify/replacer-function-result-undefined.js * - test/built-ins/JSON/stringify/replacer-function-result.js * * Function-context assertions are omitted because CodeMode functions intentionally * have no `this`. Number/String wrapper cases are omitted because CodeMode does not * support primitive wrapper objects. Proxy and Symbol cases are outside CodeMode. * * Copyright (C) 2012 Ecma International. All rights reserved. * Copyright (C) 2016 the V8 project authors. All rights reserved. * Copyright (C) 2019 Aleksey Shvayka. All rights reserved. * Copyright 2019 Kevin Gibbons. All rights reserved. * Test262 portions are governed by the BSD license in LICENSE.test262. */import { describe, expect, test } from "bun:test"import { Effect } from "effect"import { CodeMode } from "../src/index.js"
const value = async (code: string) => { const result = await Effect.runPromise(CodeMode.execute({ code, tools: {} })) if (!result.ok) throw new Error(`expected success, got ${result.error.kind}: ${result.error.message}`) return result.value}
describe("Test262 JSON.parse reviver adaptations", () => { test("test/built-ins/JSON/parse/reviver-call-order.js", async () => { expect( await value(` const calls = [] JSON.parse('{"p1":0,"p2":0,"p1":0,"2":0,"1":0}', (key, item) => { calls.push(key) return item }) return calls `), ).toEqual(["1", "2", "p1", "p2", ""]) })
test("deletes properties and array elements when the reviver returns undefined", async () => { expect( await value(` const result = JSON.parse('{"keep":1,"drop":2,"items":[1,2,3]}', (key, item) => { if (key === "drop" || key === "1") return undefined return item }) return [result, Object.hasOwn(result, "drop"), Object.hasOwn(result.items, 1), result.items.length] `), ).toEqual([{ keep: 1, items: [1, null, 3] }, false, false, 3]) })
test("replaces the root and may delete it", async () => { expect(await value(`return JSON.parse('{"a":1}', (key, item) => key === "" ? item.a : item)`)).toBe(1) expect( await value(`return JSON.parse('{"a":1}', (key, item) => key === "" ? undefined : item) === undefined`), ).toBe(true) })
test("test/built-ins/JSON/parse/reviver-call-err.js", async () => { expect( await value(`try { JSON.parse("0", () => { throw "stop" }) } catch (error) { return error } return "missed"`), ).toBe("stop") })})
describe("Test262 JSON.stringify replacer adaptations", () => { test("array replacers filter keys in their own order and apply recursively", async () => { expect(await value(`return JSON.stringify({ b: 1, a: 2, c: 3 }, ["c", "b", "a"])`)).toBe('{"c":3,"b":1,"a":2}') expect(await value(`return JSON.stringify({ a: { b: 2, c: 3 } }, ["c", "b", "a"])`)).toBe('{"a":{"c":3,"b":2}}') expect(await value(`return JSON.stringify({ a: 1 }, [])`)).toBe("{}") })
test("array replacers deduplicate and coerce number primitives", async () => { expect(await value(`return JSON.stringify({ a: 1, b: 2 }, ["a", "a", "b"])`)).toBe('{"a":1,"b":2}') expect( await value( `return JSON.stringify({ "0": 0, "1": 1, "-4": 2, "0.3": 3, "-Infinity": 4, "NaN": 5 }, [-0, 1, -4, 0.3, -Infinity, NaN])`, ), ).toBe('{"0":0,"1":1,"-4":2,"0.3":3,"-Infinity":4,"NaN":5}') })
test("array replacers ignore unsupported entry types", async () => { expect( await value(`return JSON.stringify({ true: 1, false: 2, null: 3, kept: 4 }, [true, false, null, {}, "kept"])`), ).toBe('{"kept":4}') expect(await value(`return JSON.stringify({ a: 1 }, undefined)`)).toBe('{"a":1}') })
test("function replacers receive keys and values in preorder including the root", async () => { expect( await value(` const calls = [] const output = JSON.stringify({ a: [1, 2], b: true }, (key, item) => { calls.push([key, Array.isArray(item) ? "array" : typeof item]) return item }) return [output, calls] `), ).toEqual([ '{"a":[1,2],"b":true}', [ ["", "object"], ["a", "array"], ["0", "number"], ["1", "number"], ["b", "boolean"], ], ]) })
test("test/built-ins/JSON/stringify/replacer-function-object-deleted-property.js", async () => { expect( await value(` const input = { a: 1, b: 2 } return JSON.stringify(input, (key, item) => { if (key === "a") delete input.b if (key === "b" && item === undefined) return "<replaced>" return item }) `), ).toBe('{"a":1,"b":"<replaced>"}') })
test("test/built-ins/JSON/stringify/replacer-function-object-circular.js", async () => { expect( await value(` const direct = { prop: {} } const indirect = { p1: { p2: {} } } const errors = [] try { JSON.stringify(direct, () => direct) } catch (error) { errors.push(error.name) } try { JSON.stringify(indirect, (key, item) => key === "p2" ? indirect : item) } catch (error) { errors.push(error.name) } return errors `), ).toEqual(["TypeError", "TypeError"]) })
test("test/built-ins/JSON/stringify/replacer-function-array-circular.js", async () => { expect( await value(` const circular = [{}] try { JSON.stringify(circular, () => circular) } catch (error) { return error.name } return "missed" `), ).toBe("TypeError") })
test("repeated objects outside the active ancestor chain are not circular", async () => { expect( await value(` const shared = { value: 1 } return JSON.stringify({ left: shared, right: shared }, (key, item) => item) `), ).toBe('{"left":{"value":1},"right":{"value":1}}') })
test("function replacers replace values and map undefined to omission or null", async () => { expect( await value(`return JSON.stringify({ a: 1, nested: { b: [1] } }, (key, item) => item === 1 ? undefined : item)`), ).toBe('{"nested":{"b":[null]}}') expect(await value(`return JSON.stringify(null, (key) => key === "" ? { value: 1 } : 2)`)).toBe('{"value":2}') expect(await value(`return JSON.stringify(1, () => undefined) === undefined`)).toBe(true) })
test("callable replacer results follow JSON omission semantics", async () => { expect( await value(` const fn = () => 1 return [ JSON.stringify({ user: 1, builtin: 2 }, (key, item) => key === "user" ? fn : key === "builtin" ? Math.abs : item), JSON.stringify([1, 2], (key, item) => key === "0" ? fn : key === "1" ? Number : item), JSON.stringify(null, () => "abc".includes) === undefined, ] `), ).toEqual(["{}", "[null,null]", true]) })
test("built-in toJSON conversion runs before the function replacer", async () => { expect( await value(` const seen = [] const output = JSON.stringify({ date: new Date(0), url: new URL("https://example.test/a") }, (key, item) => { if (key === "date" || key === "url") seen.push(typeof item) return item }) return [output, seen] `), ).toEqual(['{"date":"1970-01-01T00:00:00.000Z","url":"https://example.test/a"}', ["string", "string"]]) })
test("test/built-ins/JSON/stringify/replacer-function-abrupt.js", async () => { expect( await value(`try { JSON.stringify({}, () => { throw "stop" }) } catch (error) { return error } return "missed"`), ).toBe("stop") })})
describe("CodeMode JSON callback boundaries", () => { test("this remains unsupported rather than exposing callback holders", async () => { const result = await Effect.runPromise( CodeMode.execute({ code: `return JSON.parse("1", function (key, item) { return this })`, tools: {} }), ) expect(result).toMatchObject({ ok: false, error: { kind: "UnsupportedSyntax" } }) })
test("prototype-named keys parse as own data and reach the reviver", async () => { expect( await value(` const seen = [] const parsed = JSON.parse('{"__proto__":{"polluted":1},"constructor":2}', (key, item) => { seen.push(key); return item }) return [seen, parsed.__proto__.polluted, parsed.constructor, ({}).polluted, Object.keys(parsed)] `), ).toEqual([["polluted", "__proto__", "constructor", ""], 1, 2, null, ["__proto__", "constructor"]]) })
test("JSON.stringify serializes prototype-named own keys", async () => { expect(await value(`return JSON.stringify({ constructor: 1, __proto__: 2 })`)).toBe( '{"constructor":1,"__proto__":2}', ) })})