Test: Remove graceful-fs hack (#8245)

jest.config.js

@@ -23,12 +23,6 @@ module.exports = {
   ],
   coverageReporters: ["text", "lcov"],
   moduleNameMapper: {
-    // Jest wires `fs` to `graceful-fs`, which causes a memory leak when
-    // `graceful-fs` does `require('fs')`.
-    // Ref: https://github.com/facebook/jest/issues/2179#issuecomment-355231418
-    // If this is removed, see also scripts/build/build.js.
-    "graceful-fs": "<rootDir>/tests_config/fs.js",
-
     "prettier/local": "<rootDir>/tests_config/require_prettier.js",
     "prettier/standalone": "<rootDir>/tests_config/require_standalone.js",
   },

scripts/build/bundler.js

@@ -34,9 +34,6 @@ const EXTERNALS = [
   "util",
   "readline",
   "tty",
-
-  // See comment in jest.config.js
-  "graceful-fs",
 ];
 
 const entries = [
@@ -186,7 +183,6 @@ function getRollupOutputOptions(bundle) {
   const options = {
     file: `dist/${bundle.output}`,
     strict: typeof bundle.strict === "undefined" ? true : bundle.strict,
-    paths: [{ "graceful-fs": "fs" }],
   };
 
   if (bundle.target === "node") {

tests_config/fs.js

@@ -1,3 +0,0 @@
-"use strict";
-
-module.exports = require("fs");