Add test fixture

fixtures/tests/.gitignore

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+# See http://help.github.com/ignore-files/ for more about ignoring files.
+
+# dependencies
+node_modules
+
+# testing
+coverage
+
+# production
+build
+public/scheduler-unstable_mock.development.js
+public/scheduler-unstable_mock.production.min.js
+public/react.development.js
+public/react.production.min.js
+public/react-dom.development.js
+public/react-dom.production.min.js
+public/react-dom-server.browser.development.js
+public/react-dom-server.browser.production.min.js
+public/react-dom-test-utils.development.js
+public/react-dom-test-utils.production.min.js
+
+# misc
+.DS_Store
+.env
+npm-debug.log

fixtures/tests/README.md

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+## Overview
+
+Use nvm to switch node versions.
+
+### Node <15
+- Node<15
+- Node<15 + jsdom
+- Node<15 + jest + jest-environment-node
+- Node<15 + jest + jest-environment-node + jsdom
+- Node<15 + jest + jest-environment-jsdom + jsdom
+
+### Node >= 15
+- Node>=15
+- Node>=15 + jsdom
+- Node>=15 + jest + jest-environment-node
+- Node>=15 + jest + jest-environment-node + jsdom
+- Node>=15 + jest + jest-environment-jsdom + jsdom
+
+### Other
+- Browser
+- React Native

fixtures/tests/__tests__/all.js

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+/** @jest-environment node */
+
+
+const { spawn, exec } = require('child_process');
+
+const NODE_14_TEST_CASES = [
+  ['node-14'],
+  ["node-14"],
+  ["node-14-jsdom"],
+  ["node-14-jest-env-node"],
+  ["node-14-jest-env-node-jsdom"],
+  ["node-14-jest-env-jsdom"]
+]
+
+const NODE_15_TEST_CASES = [
+  ['node-15'],
+  ["node-15"],
+  ["node-15-jsdom"],
+  ["node-15-jest-env-node"],
+  ["node-15-jest-env-node-jsdom"],
+  ["node-15-jest-env-jsdom"]
+];
+
+describe.each([['Node <15', NODE_14_TEST_CASES], ['Node 15', NODE_15_TEST_CASES]])('$s', (label, cases) => {
+  if (process.env.DEBUG) {
+    console.log('Running', label);
+  }
+
+it.each(cases)('%s', (command, done) => {
+  const test = spawn('yarn', [command], {detached: true});
+  let finished = false;
+  let timeout;
+
+  function debug(...args) {
+    if (!finished && process.env.DEBUG) {
+      console.log(command, ...args);
+    }
+  }
+
+  debug(`testing ${command}...`);
+
+  function processResult(reason) {
+    if (!finished) {
+      finished = true;
+      clearTimeout(timeout);
+      try {
+        expect(command).toPass(reason);
+      } finally {
+        done();
+      }
+
+    }
+  }
+
+  test.stderr.on('data', (data) => {
+    debug('err', data.toString());
+    if (data.toString().indexOf('STARTED') >= 0) {
+      if (!timeout) {
+        debug('schduling stderr timeout');
+        timeout = setTimeout(() => {
+          debug('timed out in stderr, killing');
+          test.kill('SIGKILL');
+          processResult('TIMEOUT');
+        }, 10000);
+      } else {
+        debug('timeout already set');
+      }
+    }
+  });
+  test.stdout.on('data', (data) => {
+    debug('out', data.toString());
+    if (data.toString().indexOf('STARTED') >= 0) {
+      if (!timeout) {
+        debug('schduling stdout timeout');
+        timeout = setTimeout(() => {
+          debug('timed out in out, killing');
+          process.kill(-test.pid);
+          processResult('TIMEOUT');
+        }, 10000);
+      } else {
+        debug('timeout already set');
+      }
+    }
+  });
+  test.on('close', (code) => {
+    debug('closed', code);
+
+    if (code !== 0) {
+      processResult('FAILED');
+    } else {
+      processResult('SUCCESS');
+    }
+
+  });
+
+  test.on('error', (err) => {
+    debug('error', err);
+    processResult('ERROR');
+  });
+
+  test.on('SIGKILL', () => {
+    debug('killed');
+    processResult('KILLED');
+  });
+});
+});
+
+expect.extend({
+  toPass(command, reason) {
+    const pass = reason === 'SUCCESS';
+    function getCommand() {
+      return `(yarn ${command})`
+    }
+    if (pass) {
+      return {
+        message: () =>
+          `expected ${command} not to pass`,
+        pass: true,
+      };
+    } else {
+      return {
+        message: () => {
+          switch(reason) {
+            case 'FAILED':
+              return `expected ${command} to pass but it failed ${getCommand()}`;
+            case 'TIMEOUT':
+              return `expected ${command} to pass but it hung ${getCommand()}`;
+            case 'ERROR':
+              return `expected ${command} to pass but it errored ${getCommand()}`;
+            default:
+              return `expected ${command} to pass but it failed for an unknown reason ${reason}`;
+          }
+        },
+        pass: false,
+      };
+    }
+  },
+});

fixtures/tests/babel.config.json

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+{
+  "ignore": [],
+  "presets": ["@babel/preset-env", "@babel/preset-flow", "@babel/preset-react"]
+
+}

fixtures/tests/jest/test-jsdom.js

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+/** @jest-environment jsdom */
+
+console.log('STARTED');
+
+beforeEach(() => {
+  jest.resetModules();
+})
+
+it('should not crash in jsdom env', () => {
+  require('scheduler');
+});
+
+it('should not crash in jsdom env with jest jsdom', () => {
+  const React = require('react');
+  const ReactDOM = require('react-dom');
+  function Effecty() {
+    React.useEffect(() => {}, []);
+    return null;
+  }
+
+  ReactDOM.render(<Effecty />, document.createElement('div'));
+});
+
+it('should not crash in jsdom env with jsdom', () => {
+  var { JSDOM } = require('jsdom');
+  var { window } = new JSDOM();
+  global.window = window;
+  global.document = window.document;
+  global.navigator = {userAgent: ''}
+  const React = require('react');
+  const ReactDOM = require('react-dom');
+
+  function Effecty() {
+    React.useEffect(() => {}, []);
+    return null;
+  }
+
+  ReactDOM.render(<Effecty />, document.createElement('div'));
+});

fixtures/tests/jest/test-node-jsdom.js

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+/** @jest-environment node */
+
+console.log('STARTED');
+
+it('should not crash in node env with jsdom', () => {
+  var { JSDOM } = require('jsdom');
+  var { window } = new JSDOM();
+  global.window = window;
+  global.document = window.document;
+  global.navigator = {userAgent: ''}
+  const React = require('react');
+  const ReactDOM = require('react-dom');
+  function Effecty() {
+    React.useEffect(() => {}, []);
+    return null;
+  }
+
+  ReactDOM.render(<Effecty />, document.createElement('div'));
+});

fixtures/tests/jest/test-node.js

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+/** @jest-environment node */
+
+console.log('STARTED');
+
+it('should not crash in node env', () => {
+  global.window = global;
+
+  require('scheduler');
+});

fixtures/tests/node/test-jsdom.js

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+console.log('STARTED');
+
+var { JSDOM } = require('jsdom');
+var { window } = new JSDOM();
+global.window = window;
+global.document = window.document;
+
+require('scheduler');

fixtures/tests/node/test-node.js

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+global.__VARIANT__ = true;
+
+console.log('STARTED');
+
+global.window = global; // simulate JSDOM
+require('scheduler');

fixtures/tests/package.json

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+{
+  "name": "react-fixtures",
+  "version": "0.1.0",
+  "private": true,
+  "devDependencies": {
+    "@babel/core": "^7.13.10",
+    "@babel/plugin-transform-regenerator": "^7.12.13",
+    "@babel/preset-flow": "^7.12.13",
+    "@babel/preset-react": "^7.12.13",
+    "@babel/register": "^7.13.8"
+  },
+  "dependencies": {
+    "jest": "^26.6.3",
+    "node-14": "npm:node@14",
+    "node-15": "npm:node@15",
+    "react": "^17.0.0",
+    "react-dom": "^17.0.0",
+    "scheduler": "^0.20.1"
+  },
+  "scripts": {
+    "test-all": "jest all.js",
+    "node-14": "node_modules/node-14/bin/node node/test-node.js",
+    "node-14-jsdom": "node_modules/node-14/bin/node node/test-jsdom.js",
+    "node-14-jest-env-node": "node_modules/node-14/bin/node node_modules/jest-cli/bin/jest.js jest/test-jsdom.js",
+    "node-14-jest-env-node-jsdom": "node_modules/node-14/bin/node node_modules/jest-cli/bin/jest.js jest/test-node-jsdom.js",
+    "node-14-jest-env-jsdom": "node_modules/node-14/bin/node node_modules/jest-cli/bin/jest.js jest/test-jsdom.js",
+    "node-15": "node_modules/node-15/bin/node node/test-node.js",
+    "node-15-jsdom": "node_modules/node-15/bin/node node/test-jsdom.js",
+    "node-15-jest-env-node": "node_modules/node-15/bin/node node_modules/jest-cli/bin/jest.js jest/test-jsdom.js",
+    "node-15-jest-env-node-jsdom": "node_modules/node-15/bin/node node_modules/jest-cli/bin/jest.js jest/test-node-jsdom.js",
+    "node-15-jest-env-jsdom": "node_modules/node-15/bin/node node_modules/jest-cli/bin/jest.js jest/test-jsdom.js",
+    "main": "cp -a ./schedulers/main/. node_modules/scheduler",
+    "pr": "cp -a ./schedulers/pr/. node_modules/scheduler",
+    "stable": "cp -a ./schedulers/stable/. node_modules/"
+  },
+  "jest": {
+    "testTimeout": 20000,
+    "testMatch": [
+      "**/jest/*.js",
+      "**/__tests__/*.js"
+    ],
+    "modulePathIgnorePatterns": [
+      "<rootDir>[/\\\\](schedulers)[/\\\\]"
+    ]
+  }
+}

fixtures/tests/schedulers/pr/scheduler/LICENSE

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+MIT License
+
+Copyright (c) Facebook, Inc. and its affiliates.
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

fixtures/tests/schedulers/pr/scheduler/README.md

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+# `scheduler`
+
+This is a package for cooperative scheduling in a browser environment. It is currently used internally by React, but we plan to make it more generic.
+
+The public API for this package is not yet finalized.
+
+### Thanks
+
+The React team thanks [Anton Podviaznikov](https://podviaznikov.com/) for donating the `scheduler` package name.

fixtures/tests/schedulers/pr/scheduler/build-info.json

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+{
+  "branch": "17.0.1",
+  "buildNumber": "222790",
+  "checksum": "addb3df",
+  "commit": "8e5adfbd7",
+  "environment": "ci",
+  "reactVersion": "17.0.0-8e5adfbd7"
+}