79 lines
2.7 KiB
TypeScript
79 lines
2.7 KiB
TypeScript
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import { createRequire } from "node:module";
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import * as path from "node:path";
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import { runInNewContext } from "node:vm";
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import { expect, it } from "vitest";
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import { analyzeJavaScriptStaticSource } from "./javascriptStaticAnalysis.js";
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const named = "import {createRequire as make} from 'node:module';";
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const namespace = "import * as mod from 'node:module';";
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const cases = [
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{
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name: "own call replacement",
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prefix: named,
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body: (base: string) =>
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`const load=make(${base});load.call=()=>({kind:'local'});load.call(null,'node:path');`,
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host: false,
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},
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{
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name: "own apply replacement",
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prefix: named,
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body: (base: string) =>
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`const load=make(${base});load.apply=()=>({kind:'local'});load.apply(null,['node:path']);`,
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host: false,
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},
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{
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name: "callable captured before method replacement",
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prefix: named,
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body: (base: string) =>
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`const load=make(${base});const saved=load;load.call=()=>({kind:'local'});saved('node:path');`,
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host: true,
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},
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{
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name: "mutable default factory replacement",
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prefix: namespace,
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body: (base: string) =>
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`mod.default.createRequire=()=>()=>({kind:'local'});const load=mod.default.createRequire(${base});load('node:path');`,
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host: false,
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},
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{
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name: "factory captured before its default slot replacement",
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prefix: namespace,
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body: (base: string) =>
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`const make=mod.default.createRequire;mod.default.createRequire=()=>()=>({kind:'local'});const load=make(${base});load('node:path');`,
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host: true,
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},
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{
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name: "loader created before its default factory replacement",
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prefix: namespace,
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body: (base: string) =>
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`const load=mod.default.createRequire(${base});mod.default.createRequire=()=>()=>({kind:'local'});load('node:path');`,
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host: true,
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},
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];
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it.each(cases)(
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"keeps loader and selected member identity for $name",
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({ prefix, body, host }) => {
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// The mutable namespace default belongs to this VM fixture. Native created
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// require functions retain their real Node behavior without patching builtins.
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const result = runInNewContext(body("base"), {
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make: createRequire,
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mod: { default: { createRequire } },
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base: import.meta.url,
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});
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expect(result.join === path.join).toBe(host);
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if (!host) expect(result.kind).toBe("local");
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const analysis = analyzeJavaScriptStaticSource(
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`${prefix}${body("import.meta.url")}`,
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);
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expect(analysis.parse_error_count).toBe(0);
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expect(
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analysis.references.filter(({ kind }) => kind === "require"),
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).toEqual(
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host
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? [expect.objectContaining({ kind: "require", specifier: "node:path" })]
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: [],
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);
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},
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);
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