mirror of
https://github.com/vercel-labs/scriptc.git
synced 2026-10-24 06:14:01 +08:00
Chris Tate
385f0fb80c
- Move CommonJS export detection and package rewrites onto shared native syntax with explicit dependency resolution. - Preserve complete bundled-helper matching, significant line breaks, and deep source traversal without the TypeScript 5 parser. - Compile optional string indexing and exercise the production CommonJS passes in native executables.
44 lines
2.1 KiB
TypeScript
44 lines
2.1 KiB
TypeScript
/* The merve-port probe battery: every case here was probed against real
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* Node v24.15.0 (import the CJS from ESM, read the namespace's own keys —
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* the lexed set materializes as bindings whether or not evaluation ever
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* assigns them), and the expectations below are Node's answers byte for
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* byte. The battery exists to keep cjs-lexer.ts pinned to the ORACLE, not
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* to any npm lexer: cjs-module-lexer 2.2.0 disagrees with Node on several
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* of these (the phantom "get" for identifier-named table getters, missed
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* `k: require(…)` value reexports, defineProperty poisoning, `require (`
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* spacing) and each disagreement is called out inline. */
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import { describe, expect, test } from "vitest";
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import { cjsLexedExportsOf, cjsLexerVisibleNames } from "../src/frontend/cjs-lexer.js";
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import { cjsLexerCases as cases } from "./cjs-lexer-cases.js";
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describe("cjs-lexer answers Node's vendored lexer, shape by shape", () => {
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test.for(cases.map((c) => [c.name, c] as const))("%s", ([, c]) => {
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const lexed = cjsLexedExportsOf(c.src, "probe.cjs");
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expect([...lexed.exports].sort()).toEqual(c.exports);
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expect(lexed.reexports).toEqual(c.reexports ?? []);
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});
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});
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describe("cjsLexerVisibleNames unions CJS reexport targets", () => {
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const graph: Record<string, string> = {
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entry: `module.exports = require("./mid");\nmodule.exports.own = 1;`,
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mid: `exports.midName = 1;\nmodule.exports = require("./entry");\n__exportStar(require("./leaf"), exports);\nvar __exportStar = 0;`,
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leaf: `exports.leafName = 1;`,
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};
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const resolve = (_from: string, spec: string): string | null => {
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const key = spec.replace("./", "");
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return key in graph ? key : null;
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};
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test("names union through chains and cycles converge", () => {
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const names = cjsLexerVisibleNames("entry", (k) => graph[k]!, resolve);
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expect([...names].sort()).toEqual(["leafName", "midName", "own"]);
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});
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test("unresolvable targets contribute nothing", () => {
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const names = cjsLexerVisibleNames("mid", (k) => graph[k]!, (_f, spec) => (spec === "./leaf" ? "leaf" : null));
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expect([...names].sort()).toEqual(["leafName", "midName"]);
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});
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});
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