From c357ceabf67a8792f0075f524d07786bee49a26c Mon Sep 17 00:00:00 2001
From: Tim Seckinger <seckinger.tim@gmail.com>
Date: Tue, 28 Apr 2020 20:23:25 +0200
Subject: [PATCH] add test guarding against requiring constructed jest-main://
 paths

---
 .../__tests__/runtime_require_resolve.test.ts | 26 ++++++++++++++++---
 .../test_root/resolve_and_require_outside.js  |  9 ++++---
 2 files changed, 28 insertions(+), 7 deletions(-)

diff --git a/packages/jest-runtime/src/__tests__/runtime_require_resolve.test.ts b/packages/jest-runtime/src/__tests__/runtime_require_resolve.test.ts
index c46c92dba4a7..d7ce25458f44 100644
--- a/packages/jest-runtime/src/__tests__/runtime_require_resolve.test.ts
+++ b/packages/jest-runtime/src/__tests__/runtime_require_resolve.test.ts
@@ -8,6 +8,7 @@
 
 import type {Config} from '@jest/types';
 import type Runtime from '..';
+import {createOutsideJestVmPath} from '../helpers';
 
 let createRuntime: (
   path: string,
@@ -46,11 +47,13 @@ describe('Runtime require.resolve', () => {
   describe('with the OUTSIDE_JEST_VM_RESOLVE_OPTION', () => {
     it('forwards to the real Node require in an internal context', async () => {
       const runtime = await createRuntime(__filename);
-      const module = runtime.requireInternalModule(
+      const module = runtime.requireInternalModule<any>(
         runtime.__mockRootPath,
         './resolve_and_require_outside.js',
       );
-      expect(module).toBe(require('./test_root/create_require_module'));
+      expect(module.required).toBe(
+        require('./test_root/create_require_module'),
+      );
     });
 
     it('ignores the option in an external context', async () => {
@@ -59,8 +62,23 @@ describe('Runtime require.resolve', () => {
         runtime.__mockRootPath,
         './resolve_and_require_outside.js',
       );
-      expect(module.foo).toBe('foo');
-      expect(module).not.toBe(require('./test_root/create_require_module'));
+      expect(module.required.foo).toBe('foo');
+      expect(module.required).not.toBe(
+        require('./test_root/create_require_module'),
+      );
+    });
+
+    // make sure we also check isInternal during require, not just during resolve
+    it('does not understand a self-constructed outsideJestVmPath in an external context', async () => {
+      const runtime = await createRuntime(__filename);
+      expect(() =>
+        runtime.requireModule<any>(
+          runtime.__mockRootPath,
+          createOutsideJestVmPath(
+            require.resolve('./test_root/create_require_module.js'),
+          ),
+        ),
+      ).toThrow(/cannot find.+create_require_module/i);
     });
   });
 });
diff --git a/packages/jest-runtime/src/__tests__/test_root/resolve_and_require_outside.js b/packages/jest-runtime/src/__tests__/test_root/resolve_and_require_outside.js
index 52aa44551e02..e39ba2527380 100644
--- a/packages/jest-runtime/src/__tests__/test_root/resolve_and_require_outside.js
+++ b/packages/jest-runtime/src/__tests__/test_root/resolve_and_require_outside.js
@@ -7,10 +7,13 @@
 
 'use strict';
 
-const path = require.resolve('./create_require_module', {
+const resolved = require.resolve('./create_require_module', {
   [Symbol.for('OUTSIDE_JEST_VM_RESOLVE_OPTION')]: true,
 });
-if (typeof path !== 'string') {
+if (typeof resolved !== 'string') {
   throw new Error('require.resolve not spec-compliant: must return a string');
 }
-module.exports = require(path);
+module.exports = {
+  required: require(resolved),
+  resolved,
+};