Merge branch 'master' into uglier-inline-snapshots

* master: (398 commits)
  chore(breaking): remove undocumented `enabledTestsMap` config (jestjs#10787)
  Change expect.not.objectContaining() to match documentation (jestjs#10708)
  chore: add name to root project (jestjs#10782)
  Added explanation on how to use custom @jest-environment to docs (jestjs#10783)
  fix: remove deprecated functions from the jest object (jestjs#9853)
  chore: convert jest-runtime to ESM (jestjs#10325)
  fix(resolve): use escalade to find package.json (jestjs#10781)
  feat(jest-runner): set exit code to 1 if test logs after teardown (jestjs#10728)
  chore: add `exports` field to all `package.json`s (jestjs#9921)
  fix: do not inject `global` variable into module wrapper (jestjs#10644)
  chore: migrate jest-resolve to ESM (jestjs#10688)
  chore(transform): refactor API to pass an options bag around rather than multiple boolean options (jestjs#10753)
  chore: default to node test env rather than browser (jestjs#9874)
  fix: drop support for node 13 (jestjs#10685)
  chore: show enhanced syntax error for all syntax errors (jestjs#10749)
  chore: update lockfile after publish
  v26.6.3
  chore: update changelog for release
  Don't throw an error if mock dependency can't be found (jestjs#10779)
  chore: bump babel core types (jestjs#10772)
  ...

Author: jeysal

Diff for: .azure-pipelines-steps.yml

@@ -6,31 +6,33 @@ steps:
   - checkout: self
     path: jest
 
-  # Ensure Node.js 12 is active
+  # Ensure Node.js 14 is active
   - task: NodeTool@0
     inputs:
-      versionSpec: '12.x'
-    displayName: 'Use Node.js 12'
+      versionSpec: '14.x'
+    displayName: 'Use Node.js 14'
 
   # Ensure Python 2.7 is active
   - task: UsePythonVersion@0
     inputs:
       versionSpec: '2.7'
     displayName: 'Use Python 2.7'
 
-  # Run yarn to install dependencies and build
-  - script: node scripts/remove-postinstall
-    displayName: 'Remove postinstall script'
+  - bash: echo "##vso[task.setvariable variable=folder;isOutput=true]$(yarn config get cacheFolder)"
+    name: yarnCache
 
-  - task: CacheBeta@0
+  - task: Cache@2
     inputs:
       key: yarn | $(Agent.OS) | yarn.lock
-      path: $(YARN_CACHE_FOLDER)
+      path: $(yarnCache.folder)
     displayName: Cache Yarn packages
 
-  - script: yarn install-no-ts-build
+  - script: yarn install --immutable
     displayName: 'Install dependencies'
 
+  - script: yarn build:js
+    displayName: 'Transpile TypeScript'
+
   # Run test-ci-partial
   - script: yarn run test-ci-partial
     displayName: 'Run tests'

Diff for: .azure-pipelines.yml

@@ -34,5 +34,3 @@ variables:
 
   # Ensures the handful of tests that should be skipped during CI are
   CI: true
-
-  YARN_CACHE_FOLDER: $(Pipeline.Workspace)/.yarn

Diff for: .circleci/config.yml

@@ -1,130 +1,98 @@
 aliases:
-  - &restore-cache
-    keys:
-      - v2-dependencies-{{ .Branch }}-{{ checksum "yarn.lock" }}
-      # Fallback in case checksum fails
-      - v2-dependencies-{{ .Branch }}-
-
-  - &save-cache
-    paths:
-      - node_modules
-      - website/node_modules
-    key: v2-dependencies-{{ .Branch }}-{{ checksum "yarn.lock" }}
-
   - &filter-ignore-gh-pages
     branches:
       ignore: gh-pages
-  - &install yarn install-no-ts-build
+  - &install
+    pkg-manager: yarn
+    override-ci-command: yarn install --immutable && yarn build:js
+    cache-path: ~/.yarn/berry/cache
+    include-branch-in-cache-key: false
+    app-dir: ~/jest
 
-version: 2
+orbs:
+  node: circleci/[email protected]
+version: 2.1
 jobs:
-  test-node-8:
-    working_directory: ~/jest
-    docker:
-      - image: circleci/node:8
-    steps:
-      - checkout
-      - run:
-          command: yarn remove-prettier-dep
-      - restore-cache: *restore-cache
-      - run: *install
-      - save-cache: *save-cache
-      - run:
-          command: yarn test-ci-partial
-      - store_test_results:
-          path: reports/junit
-
   test-node-10:
     working_directory: ~/jest
-    docker:
-      - image: circleci/node:10
+    executor: node/default
     steps:
       - checkout
-      - restore-cache: *restore-cache
-      - run: *install
-      - save-cache: *save-cache
+      - node/install:
+          node-version: '10'
+          install-npm: false
+      - node/install-packages: *install
       - run:
           command: yarn test-ci-partial
       - store_test_results:
           path: reports/junit
 
   test-jest-circus:
     working_directory: ~/jest
-    docker:
-      - image: circleci/node:12
+    executor: node/default
     steps:
       - checkout
-      - restore-cache: *restore-cache
-      - run: *install
-      - save-cache: *save-cache
+      - node/install:
+          lts: true
+          install-npm: false
+      - node/install-packages: *install
       - run:
-          command: JEST_CIRCUS=1 yarn test-ci-partial
+          command: JEST_CIRCUS=1 yarn test-ci-partial && JEST_CIRCUS=1 yarn test-leak
       - store_test_results:
           path: reports/junit
 
   test-node-12:
     working_directory: ~/jest
-    docker:
-      - image: circleci/node:12
+    executor: node/default
     steps:
       - checkout
-      - restore-cache: *restore-cache
-      - run: *install
-      - save-cache: *save-cache
+      - node/install:
+          node-version: '12'
+          install-npm: false
+      - node/install-packages: *install
       - run:
-          command: yarn test-ci
+          command: yarn test-ci-partial
       - store_test_results:
           path: reports/junit
 
-  test-node-13:
+  test-node-14:
     working_directory: ~/jest
-    docker:
-      - image: circleci/node:13
+    executor: node/default
     steps:
       - checkout
-      - restore-cache: *restore-cache
-      - run: *install
-      - save-cache: *save-cache
+      - node/install:
+          node-version: '14'
+          install-npm: false
+      - node/install-packages: *install
       - run:
-          command: yarn test-ci-partial
+          command: yarn test-ci
       - store_test_results:
           path: reports/junit
 
-  test-node-14:
+  test-node-15:
     working_directory: ~/jest
-    docker:
-      - image: circleci/node:14
+    executor: node/default
     steps:
       - checkout
-      - restore-cache: *restore-cache
-      - run: *install
-      - save-cache: *save-cache
+      - node/install:
+          node-version: '15'
+          install-npm: false
+      - node/install-packages: *install
       - run:
           command: yarn test-ci-partial
       - store_test_results:
           path: reports/junit
 
-  test-browser:
-    working_directory: ~/jest
-    docker:
-      - image: circleci/node:12-browsers
-    steps:
-      - checkout
-      - restore-cache: *restore-cache
-      - run: *install
-      - save-cache: *save-cache
-      - run: yarn test-ci-es5-build-in-browser
-
   test-or-deploy-website:
     working_directory: ~/jest
-    docker:
-      - image: circleci/node:12
+    executor: node/default
     resource_class: large
     steps:
       - checkout
-      - restore-cache: *restore-cache
-      - run: *install
-      - save-cache: *save-cache
+      - node/install:
+          lts: true
+          install-npm: false
+      - node/install-packages: *install
       - run:
           name: Test or Deploy Jest Website
           command: ./.circleci/website.sh
@@ -134,12 +102,10 @@ workflows:
   version: 2
   build-and-deploy:
     jobs:
-      - test-node-8
       - test-node-10
       - test-node-12
-      - test-node-13
-      - test-node-14 # current
+      - test-node-14
+      - test-node-15 # current
       - test-jest-circus
-      - test-browser
       - test-or-deploy-website:
           filters: *filter-ignore-gh-pages

Diff for: .circleci/website.sh

@@ -13,7 +13,7 @@ else
         git config --global user.name "Website Deployment Script"
         echo "machine github.com login docusaurus-bot password $DOCUSAURUS_PUBLISH_TOKEN" > ~/.netrc
         # install Docusaurus and generate file of English strings
-        yarn && cd website && node fetchSupporters.js && yarn write-translations
+        yarn --immutable && cd website && node fetchSupporters.js && yarn write-translations
         # crowdin install
         sudo apt-get update
         sudo apt-get install default-jre rsync
@@ -30,6 +30,6 @@ else
         GIT_USER=docusaurus-bot USE_SSH=false yarn publish-gh-pages
     else
         echo "Skipping deploy. Test website build"
-        cd website && yarn && node fetchSupporters.js && yarn build
+        yarn --immutable && cd website && node fetchSupporters.js && yarn build
     fi
 fi

Diff for: .eslintignore

@@ -3,7 +3,6 @@
 bin/
 flow-typed/**
 packages/*/build/**
-packages/*/build-es5/**
 packages/jest-diff/src/cleanupSemantic.ts
 website/blog
 website/build

Diff for: .eslintplugin/index.js

@@ -0,0 +1,14 @@
+/**
+ * Copyright (c) 2016-present, Facebook, Inc. 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.
+ */
+
+exports.rules = {
+  'ban-types-eventually': require('@typescript-eslint/eslint-plugin').rules[
+    'ban-types'
+  ],
+  'prefer-rest-params-eventually': require('eslint/lib/rules/prefer-rest-params'),
+  'prefer-spread-eventually': require('eslint/lib/rules/prefer-spread'),
+};