Do symlinks at test time

.gitignore

@@ -6,6 +6,7 @@
 /examples/*/node_modules/
 /examples/mongodb/globalConfig.json
 
+/e2e/preserve-symlinks/*
 /e2e/*/node_modules
 /e2e/*/.pnp
 /e2e/*/.pnp.js

e2e/__tests__/preserveSymlinks.ts

@@ -5,12 +5,55 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-import {resolve} from 'path';
+import {existsSync, mkdirSync, rmdirSync, symlinkSync, unlinkSync} from 'fs';
+import {join, resolve} from 'path';
+
 import {wrap} from 'jest-snapshot-serializer-raw';
 import runJest from '../runJest';
 import {extractSummary} from '../Utils';
 import HasteMap = require('jest-haste-map');
 
+const destRoot = resolve(__dirname, '../preserve-symlinks');
+const srcRoot = resolve(__dirname, '../symlinked-source-dir');
+
+const files = [
+  'package.json',
+  'a.js',
+  'b.js',
+  'ab.js',
+  '__tests__/a.test.js',
+  '__tests__/b.test.js',
+  '__tests__/ab.test.js',
+];
+
+function cleanup() {
+  files
+    .map(f => join(destRoot, f))
+    .filter(f => existsSync(f))
+    .forEach(f => {
+      unlinkSync(f);
+    });
+  if (existsSync(join(destRoot, '__tests__'))) {
+    rmdirSync(join(destRoot, '__tests__'));
+  }
+  if (existsSync(destRoot)) {
+    rmdirSync(destRoot);
+  }
+}
+
+beforeAll(() => {
+  cleanup();
+  mkdirSync(destRoot);
+  mkdirSync(join(destRoot, '__tests__'));
+  files.forEach(f => {
+    symlinkSync(join(srcRoot, f), join(destRoot, f));
+  });
+});
+
+afterAll(() => {
+  cleanup();
+});
+
 test('preserving symlinks', () => {
   const {stderr, exitCode} = runJest('preserve-symlinks', ['--no-watchman'], {
     preserveSymlinks: '1',
@@ -48,15 +91,19 @@ test('hasteMap finds symlinks correctly', async () => {
   };
   const hasteMap = new HasteMap(options);
   const result = await hasteMap.build();
-  console.log('FILES', result.hasteFS.getAllFiles());
-  expect(result.hasteFS.getAllFiles()).toMatchInlineSnapshot(`
+  expect(
+    result.hasteFS
+      .getAllFiles()
+      .map(f => f.split('preserve-symlinks').pop())
+      .sort(),
+  ).toMatchInlineSnapshot(`
     Array [
-      "/Users/giancarloanemone/dev/jest/e2e/preserve-symlinks/a.js",
-      "/Users/giancarloanemone/dev/jest/e2e/preserve-symlinks/ab.js",
-      "/Users/giancarloanemone/dev/jest/e2e/preserve-symlinks/b.js",
-      "/Users/giancarloanemone/dev/jest/e2e/preserve-symlinks/__tests__/b.test.js",
-      "/Users/giancarloanemone/dev/jest/e2e/preserve-symlinks/__tests__/a.test.js",
-      "/Users/giancarloanemone/dev/jest/e2e/preserve-symlinks/__tests__/ab.test.js",
+      "/__tests__/a.test.js",
+      "/__tests__/ab.test.js",
+      "/__tests__/b.test.js",
+      "/a.js",
+      "/ab.js",
+      "/b.js",
     ]
   `);
 });

e2e/symlinked-source-dir/__tests__/a.test.js

@@ -1,3 +1,10 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ */
 const a = require('../a');
 
 test('a', () => {

e2e/symlinked-source-dir/__tests__/ab.test.js

@@ -1,3 +1,10 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ */
 const ab = require('../ab');
 
 test('ab', () => {

e2e/symlinked-source-dir/__tests__/b.test.js

@@ -1,3 +1,10 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ */
 const b = require('../b');
 
 test('b', () => {

e2e/symlinked-source-dir/a.js

@@ -1,3 +1,10 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ */
 module.exports = function a() {
   return 'a';
 };

e2e/symlinked-source-dir/ab.js

@@ -1,3 +1,10 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ */
 const a = require('./a');
 const b = require('./b');
 

e2e/symlinked-source-dir/b.js

@@ -1,3 +1,10 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
+ *
+ * This source code is licensed under the MIT license found in the
+ * LICENSE file in the root directory of this source tree.
+ *
+ */
 module.exports = function b() {
   return 'b';
 };