50 lines
2.0 KiB
TypeScript
50 lines
2.0 KiB
TypeScript
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import { execFileSync } from "node:child_process";
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import { expect, it } from "vitest";
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import { analyzeJavaScriptStaticSource } from "../../../src/domain/javascript/javascriptStaticAnalysis.js";
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it.each(
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(["call", "apply"] as const).flatMap((method) =>
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(["unmodified", "mutated", "shadowed"] as const).map((authority) => ({
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method,
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authority,
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})),
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),
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)(
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"preserves native $method authority when Function is $authority",
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({ method, authority }) => {
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const setup =
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"import {createRequire as make} from 'node:module';const load=make(import.meta.url);";
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const mutation =
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authority === "unmodified"
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? ""
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: `${authority === "shadowed" ? "const Function={prototype:{}};" : ""}Function.prototype.${method}=()=>({kind:'local'});`;
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const invocation = `load.${method}(null,${method === "call" ? "'node:path'" : "['node:path']"})`;
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const observed = execFileSync(
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process.execPath,
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[
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"--input-type=module",
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"--eval",
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`${setup}const original=globalThis.Function.prototype.${method};${mutation}let out;try{out=${invocation};}finally{globalThis.Function.prototype.${method}=original;}console.log(JSON.stringify({native:typeof out.join==='function',local:out.kind==='local'}));`,
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],
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{ encoding: "utf8", timeout: 5_000 },
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);
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// Native createRequire and Function.prototype belong to the same child
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// realm; injecting a host function into a VM would test another prototype.
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expect(JSON.parse(observed) as unknown).toEqual({
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native: authority !== "mutated",
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local: authority === "mutated",
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});
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const analysis = analyzeJavaScriptStaticSource(
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`${setup}${mutation}${invocation};`,
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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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expect.objectContaining({
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specifier: authority === "mutated" ? null : "node:path",
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}),
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]);
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},
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);
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