From a370c21539aad54f79d577b3b95203351b1fc169 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Micha=C5=82=20Pierzcha=C5=82a?= <thymikee@gmail.com>
Date: Sun, 20 Jan 2019 19:13:20 +0100
Subject: [PATCH] use random uuid for assigning project name

---
 packages/jest-config/package.json             |  3 +-
 .../src/__tests__/normalize.test.js           | 88 +++----------------
 packages/jest-config/src/normalize.js         | 22 +----
 3 files changed, 15 insertions(+), 98 deletions(-)

diff --git a/packages/jest-config/package.json b/packages/jest-config/package.json
index f41992144802..63d03d525a13 100644
--- a/packages/jest-config/package.json
+++ b/packages/jest-config/package.json
@@ -23,7 +23,8 @@
     "jest-validate": "^23.6.0",
     "micromatch": "^3.1.10",
     "pretty-format": "^23.6.0",
-    "realpath-native": "^1.0.2"
+    "realpath-native": "^1.0.2",
+    "uuid": "^3.3.2"
   },
   "engines": {
     "node": ">= 6"
diff --git a/packages/jest-config/src/__tests__/normalize.test.js b/packages/jest-config/src/__tests__/normalize.test.js
index 271b7153b0fb..a4df3af60e81 100644
--- a/packages/jest-config/src/__tests__/normalize.test.js
+++ b/packages/jest-config/src/__tests__/normalize.test.js
@@ -47,87 +47,21 @@ beforeEach(() => {
   require('jest-resolve').findNodeModule = findNodeModule;
 });
 
-it('picks a name based on the rootDir', () => {
+it('assigns a random 32-byte hash as a name to avoid clashes', () => {
   const rootDir = '/root/path/foo';
-  const expected = crypto
-    .createHash('md5')
-    .update('/root/path/foo')
-    .digest('hex');
-  expect(
-    normalize(
-      {
-        rootDir,
-      },
-      {},
-    ).options.name,
-  ).toBe(expected);
-});
-
-it('picks a name for projects based on the main rootDir', () => {
-  const rootDir = '/root/path/foo';
-  const firstExpected = crypto
-    .createHash('md5')
-    .update('/root/path/foo')
-    .digest('hex');
-  const secondExpected = crypto
-    .createHash('md5')
-    .update('/root/path/foo:1')
-    .digest('hex');
-
-  const options = normalize(
-    {
-      projects: [{}, {}],
-      rootDir,
-    },
-    {},
-  );
-
-  expect(options.options.projects[0].name).toBe(firstExpected);
-  expect(options.options.projects[1].name).toBe(secondExpected);
-});
-
-it('picks a name for projects based on the projects rootDir', () => {
-  const firstRootDir = '/root/path/foo';
-  const secondRootDir = '/root/path/bar';
-  const firstExpected = crypto
-    .createHash('md5')
-    .update('/root/path/foo')
-    .digest('hex');
-  const secondExpected = crypto
-    .createHash('md5')
-    .update('/root/path/foo:1')
-    .digest('hex');
-  const thirdExpected = crypto
-    .createHash('md5')
-    .update('/root/path/bar')
-    .digest('hex');
-  const fourthExpected = crypto
-    .createHash('md5')
-    .update('/root/path/baz')
-    .digest('hex');
-
-  const options = normalize(
-    {
-      projects: [
-        {rootDir: firstRootDir},
-        {rootDir: firstRootDir},
-        {rootDir: secondRootDir},
-        {},
-      ],
-      rootDir: '/root/path/baz',
-    },
-    {},
-  );
-
-  expect(options.options.projects[0].name).toBe(firstExpected);
-  expect(options.options.projects[1].name).toBe(secondExpected);
-  expect(options.options.projects[2].name).toBe(thirdExpected);
-  expect(options.options.projects[3].name).toBe(fourthExpected);
+  const {name: name1} = normalize({rootDir}, {}).options;
+  const {name: name2} = normalize({rootDir}, {}).options;
+
+  expect(name1).toEqual(expect.any(String));
+  expect(name1).toHaveLength(32);
+  expect(name2).toEqual(expect.any(String));
+  expect(name2).toHaveLength(32);
+  expect(name1).not.toBe(name2);
 });
 
 it('keeps custom project name based on the projects rootDir', () => {
   const name = 'test';
-  const options = normalize(
+  const {options} = normalize(
     {
       projects: [{name, rootDir: '/path/to/foo'}],
       rootDir: '/root/path/baz',
@@ -135,7 +69,7 @@ it('keeps custom project name based on the projects rootDir', () => {
     {},
   );
 
-  expect(options.options.projects[0].name).toBe(name);
+  expect(options.projects[0].name).toBe(name);
 });
 
 it('keeps custom names based on the rootDir', () => {
diff --git a/packages/jest-config/src/normalize.js b/packages/jest-config/src/normalize.js
index 76e7833aece2..f63714494aca 100644
--- a/packages/jest-config/src/normalize.js
+++ b/packages/jest-config/src/normalize.js
@@ -17,6 +17,7 @@ import type {
 } from 'types/Config';
 
 import crypto from 'crypto';
+import uuid from 'uuid/v4';
 import glob from 'glob';
 import path from 'path';
 import {ValidationError, validate} from 'jest-validate';
@@ -264,33 +265,14 @@ const normalizePreprocessor = (options: InitialOptions): InitialOptions => {
 };
 
 const normalizeMissingOptions = (options: InitialOptions): InitialOptions => {
-  const knownRootDirs = new Set();
   if (!options.name) {
     options.name = crypto
       .createHash('md5')
       .update(options.rootDir)
+      .update(uuid())
       .digest('hex');
   }
 
-  if (Array.isArray(options.projects)) {
-    options.projects = options.projects.map((project, index) => {
-      if (typeof project !== 'string' && !project.name) {
-        let rootDir = project.rootDir || options.rootDir;
-        if (knownRootDirs.has(rootDir)) {
-          rootDir = `${rootDir}:${index}`;
-        }
-
-        knownRootDirs.add(rootDir);
-        project.name = crypto
-          .createHash('md5')
-          .update(rootDir)
-          .digest('hex');
-      }
-
-      return project;
-    });
-  }
-
   if (!options.setupFiles) {
     options.setupFiles = [];
   }