Files
reverse-engineering-anything/tests/acceptance/applications/webpackLoaderReturnsCli.test.ts
T
Kaoru0822andClaude Opus 5.5 63b43b69bb fix(javascript): refuse Webpack loaders that can fall off the end (#6007)
* fix(javascript): refuse Webpack loaders that can fall off the end

The bootstrap integrity proof accepted any loader whose explicit returns
all yielded the module's exports. A loader with no returns, or with only
the cache-hit return, passed vacuously even though its miss path returns
undefined, so a bundled `n(45840).BrowserWindow` became an exact Electron
window.

Require that the loader body cannot complete normally before the proof
checks its returns, so the bundled-call identity stays unresolved while
the literal require("electron") reference is preserved.

Fixes #5958

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* test(javascript): cover finally completion in Webpack loader proofs

Group the loader completion-path cases in their own suite and add
focused finally cases: a completing finally keeps a falling-through
catch unproven, a finally returning another value stays unresolved, and
a finally returning the exports proves the loader.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

* test(javascript): keep IPC checks for unresolved Webpack loader cases

Share the unresolved-identity assertion so the completion-path cases
also reject directly attributed IPC observations.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

---------

Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-21 07:53:42 -07:00

63 lines
2.3 KiB
TypeScript

import { expect } from "vitest";
import { parseEvidence } from "../../../src/domain/evidence.js";
import { javascriptApplicationAnalysisResultSchema } from "../../../src/domain/javascript/javascriptApplicationAnalysis.js";
import { createTestTempDirectory } from "../../fixtures/temporaryDirectory.js";
import { cliTest } from "../../support/cli/cliFixture.js";
import { writeFixtureFiles } from "../../support/javascriptApplicationFixture.js";
const CACHE_HIT = `
var cached = cache[key];
if (cached !== undefined) return cached.exports;`;
const loaderSource = (cacheHit: string, missReturn: string) => `(function () {
var modules = {
45840: function (module) { module.exports = require("electron"); },
1: function (module, exports, n) { new (n(45840).BrowserWindow)({}); }
}, cache = {};
function n(key) {${cacheHit}
var module = (cache[key] = { exports: {} });
modules[key](module, module.exports, n);${missReturn}
}
n(1);
})();`;
cliTest.for([
[
"the canonical loader",
loaderSource(CACHE_HIT, "\n return module.exports;"),
1,
],
["a loader that returns only cached exports", loaderSource(CACHE_HIT, ""), 0],
["a loader without returns", loaderSource("", ""), 0],
] as const)(
"attributes the BrowserWindow to Electron only through %s",
async ([, source, windows], { cli }) => {
const root = await createTestTempDirectory("rea-webpack-loader-returns-");
await writeFixtureFiles(root, {
"main.js": source,
"package.json": JSON.stringify({ name: "fixture", main: "main.js" }),
});
const response = await cli.run({
arguments: ["analyze-javascript-application", root, "--format", "json"],
environment: { REA_LOG_LEVEL: "silent" },
});
expect(response.exitCode).toBe(0);
const result = javascriptApplicationAnalysisResultSchema.parse(
parseEvidence(response.json).normalized_result,
);
expect(result.summary.browser_windows).toBe(windows);
// The literal external stays observed even when the loader is unproven.
expect(
result.graph.nodes.flatMap(({ observations }) =>
observations.map(({ properties }) => properties),
),
).toContainEqual(
expect.objectContaining({
reference_kind: "require",
specifier: "electron",
}),
);
},
);