chore: migrate jest-util to TypeScript #7844

SimenB · 2019-02-09T23:16:55Z

Summary

Cheated a bit since jest-mock is not migrated yet, but jest-util is a dependency of so many other packages (adn jest-mock is just used for types to FakeTimers) that I think it's fine.

Built diff:

diff --git c/packages/jest-util/build/BufferedConsole.js w/packages/jest-util/build/BufferedConsole.js
index 41a049558..508ebd92b 100644
--- c/packages/jest-util/build/BufferedConsole.js
+++ w/packages/jest-util/build/BufferedConsole.js
@@ -35,6 +35,16 @@ function _util() {
   return data;
 }
 
+function _readableStream() {
+  const data = require('readable-stream');
+
+  _readableStream = function _readableStream() {
+    return data;
+  };
+
+  return data;
+}
+
 function _chalk() {
   const data = _interopRequireDefault(require('chalk'));
 
@@ -56,16 +66,16 @@ function _interopRequireDefault(obj) {
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
- *
- *
  */
 class BufferedConsole extends _console().Console {
   constructor(getSourceMaps) {
     const buffer = [];
-    super({
-      write: message =>
-        BufferedConsole.write(buffer, 'log', message, null, getSourceMaps())
-    });
+    super(
+      new (_readableStream()).Writable({
+        write: message =>
+          BufferedConsole.write(buffer, 'log', message, null, getSourceMaps())
+      })
+    );
     this._getSourceMaps = getSourceMaps;
     this._buffer = buffer;
     this._counters = {};
@@ -97,9 +107,9 @@ class BufferedConsole extends _console().Console {
     );
   }
 
-  assert(...args) {
+  assert(value, message) {
     try {
-      (0, _assert().default)(...args);
+      (0, _assert().default)(value, message);
     } catch (error) {
       this._log('assert', error.toString());
     }
@@ -120,37 +130,40 @@ class BufferedConsole extends _console().Console {
     this._counters[label] = 0;
   }
 
-  debug(...args) {
-    this._log('debug', (0, _util().format)(...args));
+  debug(firstArg, ...rest) {
+    this._log('debug', (0, _util().format)(firstArg, ...rest));
   }
 
-  dir(...args) {
-    this._log('dir', (0, _util().format)(...args));
+  dir(firstArg, ...rest) {
+    this._log('dir', (0, _util().format)(firstArg, ...rest));
   }
 
-  dirxml(...args) {
-    this._log('dirxml', (0, _util().format)(...args));
+  dirxml(firstArg, ...rest) {
+    this._log('dirxml', (0, _util().format)(firstArg, ...rest));
   }
 
-  error(...args) {
-    this._log('error', (0, _util().format)(...args));
+  error(firstArg, ...rest) {
+    this._log('error', (0, _util().format)(firstArg, ...rest));
   }
 
-  group(...args) {
+  group(title, ...rest) {
     this._groupDepth++;
 
-    if (args.length > 0) {
-      this._log('group', _chalk().default.bold((0, _util().format)(...args)));
+    if (title || rest.length > 0) {
+      this._log(
+        'group',
+        _chalk().default.bold((0, _util().format)(title, ...rest))
+      );
     }
   }
 
-  groupCollapsed(...args) {
+  groupCollapsed(title, ...rest) {
     this._groupDepth++;
 
-    if (args.length > 0) {
+    if (title || rest.length > 0) {
       this._log(
         'groupCollapsed',
-        _chalk().default.bold((0, _util().format)(...args))
+        _chalk().default.bold((0, _util().format)(title, ...rest))
       );
     }
   }
@@ -161,12 +174,12 @@ class BufferedConsole extends _console().Console {
     }
   }
 
-  info(...args) {
-    this._log('info', (0, _util().format)(...args));
+  info(firstArg, ...rest) {
+    this._log('info', (0, _util().format)(firstArg, ...rest));
   }
 
-  log(...args) {
-    this._log('log', (0, _util().format)(...args));
+  log(firstArg, ...rest) {
+    this._log('log', (0, _util().format)(firstArg, ...rest));
   }
 
   time(label = 'default') {
@@ -182,7 +195,7 @@ class BufferedConsole extends _console().Console {
 
     if (startTime) {
       const endTime = new Date();
-      const time = endTime - startTime;
+      const time = endTime.getTime() - startTime.getTime();
 
       this._log('time', (0, _util().format)(`${label}: ${time}ms`));
 
@@ -190,8 +203,8 @@ class BufferedConsole extends _console().Console {
     }
   }
 
-  warn(...args) {
-    this._log('warn', (0, _util().format)(...args));
+  warn(firstArg, ...rest) {
+    this._log('warn', (0, _util().format)(firstArg, ...rest));
   }
 
   getBuffer() {
diff --git c/packages/jest-util/build/CustomConsole.js w/packages/jest-util/build/CustomConsole.js
index 9e004d6af..2b6a9d80b 100644
--- c/packages/jest-util/build/CustomConsole.js
+++ w/packages/jest-util/build/CustomConsole.js
@@ -56,17 +56,12 @@ function _interopRequireDefault(obj) {
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
- *
- *
  */
-
-/* global stream$Writable */
 class CustomConsole extends _console().Console {
-  constructor(stdout, stderr, formatBuffer) {
+  constructor(stdout, stderr, formatBuffer = (_type, message) => message) {
     super(stdout, stderr);
-
-    this._formatBuffer = formatBuffer || ((type, message) => message);
-
+    this._stdout = stdout;
+    this._formatBuffer = formatBuffer;
     this._counters = {};
     this._timers = {};
     this._groupDepth = 0;
@@ -84,9 +79,9 @@ class CustomConsole extends _console().Console {
     );
   }
 
-  assert(...args) {
+  assert(value, message) {
     try {
-      (0, _assert().default)(...args);
+      (0, _assert().default)(value, message);
     } catch (error) {
       this._log('assert', error.toString());
     }
@@ -107,37 +102,40 @@ class CustomConsole extends _console().Console {
     this._counters[label] = 0;
   }
 
-  debug(...args) {
-    this._log('debug', (0, _util().format)(...args));
+  debug(firstArg, ...args) {
+    this._log('debug', (0, _util().format)(firstArg, ...args));
   }
 
-  dir(...args) {
-    this._log('dir', (0, _util().format)(...args));
+  dir(firstArg, ...args) {
+    this._log('dir', (0, _util().format)(firstArg, ...args));
   }
 
-  dirxml(...args) {
-    this._log('dirxml', (0, _util().format)(...args));
+  dirxml(firstArg, ...args) {
+    this._log('dirxml', (0, _util().format)(firstArg, ...args));
   }
 
-  error(...args) {
-    this._log('error', (0, _util().format)(...args));
+  error(firstArg, ...args) {
+    this._log('error', (0, _util().format)(firstArg, ...args));
   }
 
-  group(...args) {
+  group(title, ...args) {
     this._groupDepth++;
 
-    if (args.length > 0) {
-      this._log('group', _chalk().default.bold((0, _util().format)(...args)));
+    if (title || args.length > 0) {
+      this._log(
+        'group',
+        _chalk().default.bold((0, _util().format)(title, ...args))
+      );
     }
   }
 
-  groupCollapsed(...args) {
+  groupCollapsed(title, ...args) {
     this._groupDepth++;
 
-    if (args.length > 0) {
+    if (title || args.length > 0) {
       this._log(
         'groupCollapsed',
-        _chalk().default.bold((0, _util().format)(...args))
+        _chalk().default.bold((0, _util().format)(title, ...args))
       );
     }
   }
@@ -148,12 +146,12 @@ class CustomConsole extends _console().Console {
     }
   }
 
-  info(...args) {
-    this._log('info', (0, _util().format)(...args));
+  info(firstArg, ...args) {
+    this._log('info', (0, _util().format)(firstArg, ...args));
   }
 
-  log(...args) {
-    this._log('log', (0, _util().format)(...args));
+  log(firstArg, ...args) {
+    this._log('log', (0, _util().format)(firstArg, ...args));
   }
 
   time(label = 'default') {
@@ -168,8 +166,8 @@ class CustomConsole extends _console().Console {
     const startTime = this._timers[label];
 
     if (startTime) {
-      const endTime = new Date();
-      const time = endTime - startTime;
+      const endTime = new Date().getTime();
+      const time = endTime - startTime.getTime();
 
       this._log('time', (0, _util().format)(`${label}: ${time}ms`));
 
@@ -177,8 +175,8 @@ class CustomConsole extends _console().Console {
     }
   }
 
-  warn(...args) {
-    this._log('warn', (0, _util().format)(...args));
+  warn(firstArg, ...args) {
+    this._log('warn', (0, _util().format)(firstArg, ...args));
   }
 
   getBuffer() {
diff --git c/packages/jest-util/build/ErrorWithStack.js w/packages/jest-util/build/ErrorWithStack.js
index c7c6f1935..da7b9d2a1 100644
--- c/packages/jest-util/build/ErrorWithStack.js
+++ w/packages/jest-util/build/ErrorWithStack.js
@@ -10,8 +10,6 @@ exports.default = void 0;
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
- *
- *
  */
 class ErrorWithStack extends Error {
   constructor(message, callsite) {
diff --git c/packages/jest-util/build/FakeTimers.js w/packages/jest-util/build/FakeTimers.js
index 7ef55964c..69012086d 100644
--- c/packages/jest-util/build/FakeTimers.js
+++ w/packages/jest-util/build/FakeTimers.js
@@ -404,17 +404,11 @@ class FakeTimers {
     this._cancelledImmediates[uuid] = true;
   }
 
-  _fakeNextTick(callback) {
+  _fakeNextTick(callback, ...args) {
     if (this._disposed) {
       return;
     }
 
-    const args = [];
-
-    for (let ii = 1, ll = arguments.length; ii < ll; ii++) {
-      args.push(arguments[ii]);
-    }
-
     const uuid = String(this._uuidCounter++);
 
     this._ticks.push({
@@ -443,17 +437,11 @@ class FakeTimers {
     });
   }
 
-  _fakeSetImmediate(callback) {
+  _fakeSetImmediate(callback, ...args) {
     if (this._disposed) {
       return null;
     }
 
-    const args = [];
-
-    for (let ii = 1, ll = arguments.length; ii < ll; ii++) {
-      args.push(arguments[ii]);
-    }
-
     const uuid = this._uuidCounter++;
 
     this._immediates.push({
@@ -484,7 +472,7 @@ class FakeTimers {
     return uuid;
   }
 
-  _fakeSetInterval(callback, intervalDelay) {
+  _fakeSetInterval(callback, intervalDelay, ...args) {
     if (this._disposed) {
       return null;
     }
@@ -493,12 +481,6 @@ class FakeTimers {
       intervalDelay = 0;
     }
 
-    const args = [];
-
-    for (let ii = 2, ll = arguments.length; ii < ll; ii++) {
-      args.push(arguments[ii]);
-    }
-
     const uuid = this._uuidCounter++;
     this._timers[String(uuid)] = {
       callback: (function(_callback3) {
@@ -519,18 +501,12 @@ class FakeTimers {
     return this._timerConfig.idToRef(uuid);
   }
 
-  _fakeSetTimeout(callback, delay) {
+  _fakeSetTimeout(callback, delay, ...args) {
     if (this._disposed) {
       return null;
     } // eslint-disable-next-line no-bitwise
 
     delay = Number(delay) | 0;
-    const args = [];
-
-    for (let ii = 2, ll = arguments.length; ii < ll; ii++) {
-      args.push(arguments[ii]);
-    }
-
     const uuid = this._uuidCounter++;
     this._timers[String(uuid)] = {
       callback: (function(_callback4) {
@@ -545,7 +521,7 @@ class FakeTimers {
         return callback;
       })(() => callback.apply(null, args)),
       expiry: this._now + delay,
-      interval: null,
+      interval: undefined,
       type: 'timeout'
     };
     return this._timerConfig.idToRef(uuid);
@@ -584,7 +560,7 @@ class FakeTimers {
         break;
 
       case 'interval':
-        timer.expiry = this._now + timer.interval;
+        timer.expiry = this._now + (timer.interval || 0);
         timer.callback();
         break;
 
diff --git c/packages/jest-util/build/NullConsole.js w/packages/jest-util/build/NullConsole.js
index c74ce5a84..d0feaaf62 100644
--- c/packages/jest-util/build/NullConsole.js
+++ w/packages/jest-util/build/NullConsole.js
@@ -16,8 +16,6 @@ function _interopRequireDefault(obj) {
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
- *
- *
  */
 class NullConsole extends _CustomConsole.default {
   assert() {}
diff --git c/packages/jest-util/build/clearLine.js w/packages/jest-util/build/clearLine.js
index e4c943518..425f7d1d3 100644
--- c/packages/jest-util/build/clearLine.js
+++ w/packages/jest-util/build/clearLine.js
@@ -10,11 +10,7 @@ exports.default = void 0;
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
- *
- *
  */
-
-/* global stream$Writable */
 var _default = stream => {
   if (process.stdout.isTTY) {
     stream.write('\x1b[999D\x1b[K');
diff --git c/packages/jest-util/build/convertDescriptorToString.js w/packages/jest-util/build/convertDescriptorToString.js
index 040b18695..130fd68d9 100644
--- c/packages/jest-util/build/convertDescriptorToString.js
+++ w/packages/jest-util/build/convertDescriptorToString.js
@@ -10,8 +10,6 @@ exports.default = convertDescriptorToString;
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
- *
- *
  */
 // See: https://github.com/facebook/jest/pull/5154
 function convertDescriptorToString(descriptor) {
@@ -33,8 +31,9 @@ function convertDescriptorToString(descriptor) {
 
   const stringified = descriptor.toString();
   const typeDescriptorMatch = stringified.match(/class|function/);
-  const indexOfNameSpace =
-    typeDescriptorMatch.index + typeDescriptorMatch[0].length;
+  const indexOfNameSpace = // @ts-ignore
+    typeDescriptorMatch.index + typeDescriptorMatch[0].length; // @ts-ignore
+
   const indexOfNameAfterSpace = stringified.search(/\(|\{/, indexOfNameSpace);
   const name = stringified.substring(indexOfNameSpace, indexOfNameAfterSpace);
   return name.trim();
diff --git c/packages/jest-util/build/createDirectory.js w/packages/jest-util/build/createDirectory.js
index 10f36bc1f..5caa8c40e 100644
--- c/packages/jest-util/build/createDirectory.js
+++ w/packages/jest-util/build/createDirectory.js
@@ -24,8 +24,6 @@ function _interopRequireDefault(obj) {
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
- *
- *
  */
 function createDirectory(path) {
   try {
diff --git c/packages/jest-util/build/createProcessObject.js w/packages/jest-util/build/createProcessObject.js
index bb950e122..126aed5bb 100644
--- c/packages/jest-util/build/createProcessObject.js
+++ w/packages/jest-util/build/createProcessObject.js
@@ -16,8 +16,6 @@ function _interopRequireDefault(obj) {
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
- *
- *
  */
 const BLACKLIST = new Set(['env', 'mainModule', '_events']); // The "process.env" object has a bunch of particularities: first, it does not
 // directly extend from Object; second, it converts any assigned value to a
@@ -33,7 +31,7 @@ function createProcessEnv() {
   const real = Object.create(proto);
   const lookup = {};
   const proxy = new Proxy(real, {
-    deleteProperty(target, key) {
+    deleteProperty(_target, key) {
       for (const name in real) {
         if (real.hasOwnProperty(name)) {
           if (typeof key === 'string' && process.platform === 'win32') {
@@ -53,7 +51,7 @@ function createProcessEnv() {
       return true;
     },
 
-    get(target, key) {
+    get(_target, key) {
       if (typeof key === 'string' && process.platform === 'win32') {
         return lookup[key in proto ? key : key.toLowerCase()];
       } else {
@@ -61,7 +59,7 @@ function createProcessEnv() {
       }
     },
 
-    set(target, key, value) {
+    set(_target, key, value) {
       const strValue = '' + value;
 
       if (typeof key === 'string') {
diff --git c/packages/jest-util/build/deepCyclicCopy.js w/packages/jest-util/build/deepCyclicCopy.js
index 410494a47..3bbf028ee 100644
--- c/packages/jest-util/build/deepCyclicCopy.js
+++ w/packages/jest-util/build/deepCyclicCopy.js
@@ -10,23 +10,23 @@ exports.default = deepCyclicCopy;
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
- *
- *
  */
 const EMPTY = new Set();
 
-// $FlowFixMe: Node 6 does not have gOPDs, so we define a simple polyfill for it.
+// Node 6 does not have gOPDs, so we define a simple polyfill for it.
 if (!Object.getOwnPropertyDescriptors) {
-  // $FlowFixMe: polyfill
+  // @ts-ignore: polyfill
   Object.getOwnPropertyDescriptors = obj => {
     const list = {};
-    Object.getOwnPropertyNames(obj)
-      .concat(Object.getOwnPropertySymbols(obj)) // $FlowFixMe: assignment with a Symbol is OK.
+    Object.getOwnPropertyNames(obj) // @ts-ignore: assignment with a Symbol is OK.
+      .concat(Object.getOwnPropertySymbols(obj))
       .forEach(key => (list[key] = Object.getOwnPropertyDescriptor(obj, key)));
     return list;
   };
 }
 
+Symbol.for('hello');
+
 function deepCyclicCopy(
   value,
   options = {
@@ -78,7 +78,7 @@ function deepCyclicCopyObject(object, options, cycles) {
 }
 
 function deepCyclicCopyArray(array, options, cycles) {
-  const newArray = options.keepPrototype // $FlowFixMe: getPrototypeOf an array is OK.
+  const newArray = options.keepPrototype
     ? new (Object.getPrototypeOf(array)).constructor(array.length)
     : [];
   const length = array.length;
diff --git c/packages/jest-util/build/formatTestResults.js w/packages/jest-util/build/formatTestResults.js
index 1994ce21d..4887e9343 100644
--- c/packages/jest-util/build/formatTestResults.js
+++ w/packages/jest-util/build/formatTestResults.js
@@ -10,8 +10,6 @@ exports.default = formatTestResults;
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
- *
- *
  */
 const formatResult = (testResult, codeCoverageFormatter, reporter) => {
   const now = Date.now();
diff --git c/packages/jest-util/build/getCallsite.js w/packages/jest-util/build/getCallsite.js
index 2e54e4317..f9f733813 100644
--- c/packages/jest-util/build/getCallsite.js
+++ w/packages/jest-util/build/getCallsite.js
@@ -44,8 +44,6 @@ function _interopRequireDefault(obj) {
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
- *
- *
  */
 // Copied from https://github.com/rexxars/sourcemap-decorate-callsites/blob/5b9735a156964973a75dc62fd2c7f0c1975458e8/lib/index.js#L113-L158
 const addSourceMapConsumer = (callsite, consumer) => {
@@ -56,8 +54,8 @@ const addSourceMapConsumer = (callsite, consumer) => {
   function getPosition() {
     if (!position) {
       position = consumer.originalPositionFor({
-        column: getColumnNumber.call(callsite),
-        line: getLineNumber.call(callsite)
+        column: getColumnNumber.call(callsite) || -1,
+        line: getLineNumber.call(callsite) || -1
       });
     }
 
@@ -85,14 +83,14 @@ const addSourceMapConsumer = (callsite, consumer) => {
 var _default = (level, sourceMaps) => {
   const levelAfterThisCall = level + 1;
   const stack = (0, _callsites().default)()[levelAfterThisCall];
-  const sourceMapFileName = sourceMaps && sourceMaps[stack.getFileName()];
+  const sourceMapFileName = sourceMaps && sourceMaps[stack.getFileName() || ''];
 
   if (sourceMapFileName) {
     try {
       const sourceMap = _gracefulFs().default.readFileSync(
         sourceMapFileName,
         'utf8'
-      );
+      ); // @ts-ignore: Not allowed to pass string
 
       addSourceMapConsumer(
         stack,
diff --git c/packages/jest-util/build/getConsoleOutput.js w/packages/jest-util/build/getConsoleOutput.js
index 3acf84da7..3774196a6 100644
--- c/packages/jest-util/build/getConsoleOutput.js
+++ w/packages/jest-util/build/getConsoleOutput.js
@@ -44,8 +44,6 @@ function _interopRequireDefault(obj) {
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
- *
- *
  */
 var _default = (root, verbose, buffer) => {
   const TITLE_INDENT = verbose ? '  ' : '    ';
diff --git c/packages/jest-util/build/getFailedSnapshotTests.js w/packages/jest-util/build/getFailedSnapshotTests.js
index 6b061c2f8..f24176d10 100644
--- c/packages/jest-util/build/getFailedSnapshotTests.js
+++ w/packages/jest-util/build/getFailedSnapshotTests.js
@@ -10,8 +10,6 @@ exports.default = void 0;
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
- *
- *
  */
 function getFailedSnapshotTests(testResults) {
   const failedTestPaths = [];
diff --git c/packages/jest-util/build/index.js w/packages/jest-util/build/index.js
index 4c34a775c..173e186fc 100644
--- c/packages/jest-util/build/index.js
+++ w/packages/jest-util/build/index.js
@@ -78,8 +78,6 @@ function _interopRequireDefault(obj) {
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
- *
- *
  */
 module.exports = {
   BufferedConsole: _BufferedConsole.default,
diff --git c/packages/jest-util/build/installCommonGlobals.js w/packages/jest-util/build/installCommonGlobals.js
index 528b1a647..34cdd7967 100644
--- c/packages/jest-util/build/installCommonGlobals.js
+++ w/packages/jest-util/build/installCommonGlobals.js
@@ -30,8 +30,6 @@ function _interopRequireDefault(obj) {
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
- *
- *
  */
 const DTRACE = Object.keys(global).filter(key => key.startsWith('DTRACE'));
 
@@ -73,7 +71,9 @@ function _default(globalObject, globals) {
   }); // Forward some APIs.
 
   DTRACE.forEach(dtrace => {
+    // @ts-ignore
     globalObject[dtrace] = function(...args) {
+      // @ts-ignore
       return global[dtrace].apply(this, args);
     };
   }); // Forward some others (this breaks the sandbox but for now it's OK).
diff --git c/packages/jest-util/build/isInteractive.js w/packages/jest-util/build/isInteractive.js
index 068b36c2f..9c1bf160e 100644
--- c/packages/jest-util/build/isInteractive.js
+++ w/packages/jest-util/build/isInteractive.js
@@ -21,6 +21,6 @@ function _interopRequireDefault(obj) {
 
 // Copyright (c) Facebook, Inc. and its affiliates. All Rights Reserved.
 var _default =
-  process.stdout.isTTY && process.env.TERM !== 'dumb' && !_isCi().default;
+  !!process.stdout.isTTY && process.env.TERM !== 'dumb' && !_isCi().default;
 
 exports.default = _default;
diff --git c/packages/jest-util/build/replacePathSepForGlob.js w/packages/jest-util/build/replacePathSepForGlob.js
index d1f0e3f75..b7a1d0f90 100644
--- c/packages/jest-util/build/replacePathSepForGlob.js
+++ w/packages/jest-util/build/replacePathSepForGlob.js
@@ -10,8 +10,6 @@ exports.default = replacePathSepForGlob;
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
- *
- *
  */
 function replacePathSepForGlob(path) {
   return path.replace(/\\(?![{}()+?.^$])/g, '/');
diff --git c/packages/jest-util/build/setGlobal.js w/packages/jest-util/build/setGlobal.js
index b5d1af5d4..3ff3cc67a 100644
--- c/packages/jest-util/build/setGlobal.js
+++ w/packages/jest-util/build/setGlobal.js
@@ -10,9 +10,10 @@ exports.default = void 0;
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
- *
- *
  */
-var _default = (global, key, value) => (global[key] = value);
+var _default = (globalToMutate, key, value) => {
+  // @ts-ignore: no index
+  globalToMutate[key] = value;
+};
 
 exports.default = _default;
diff --git c/packages/jest-util/build/specialChars.js w/packages/jest-util/build/specialChars.js
index 1497c4407..1f9ddcc4e 100644
--- c/packages/jest-util/build/specialChars.js
+++ w/packages/jest-util/build/specialChars.js
@@ -10,8 +10,6 @@ exports.CLEAR = exports.ICONS = exports.ARROW = void 0;
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
- *
- *
  */
 const isWindows = process.platform === 'win32';
 const ARROW = ' \u203A ';

Test plan

Green CI

packages/jest-util/package.json

packages/jest-util/src/CustomConsole.ts

packages/jest-util/src/FakeTimers.ts

packages/jest-util/src/__tests__/fakeTimers.test.ts

packages/jest-util/src/convertDescriptorToString.ts

packages/jest-util/src/isInteractive.ts

github-actions · 2021-05-12T01:30:18Z

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facebook-github-bot added the cla signed label Feb 9, 2019

chore: migrate jest-util to TypeScript

02aa43c

SimenB force-pushed the util branch from c1cffb5 to 02aa43c Compare February 9, 2019 23:18

SimenB added this to the TypeScript Migration milestone Feb 9, 2019

SimenB mentioned this pull request Feb 9, 2019

☂️TypeScript migration tracking issue #7807

Closed

SimenB commented Feb 9, 2019

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SimenB added 4 commits February 10, 2019 00:22

oops

73d6f85

meh

0a129af

update snapshot

926675b

add types field to package.json

085e545

thymikee approved these changes Feb 10, 2019

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pr feesback

c2a391f

SimenB mentioned this pull request Feb 10, 2019

Use property initializer syntax in Jest codebase #7846

Closed

SimenB merged commit f57e288 into jestjs:master Feb 10, 2019

SimenB deleted the util branch February 10, 2019 09:26

SimenB mentioned this pull request Feb 14, 2019

Getting "TypeError: Path must be a string. Received undefined" preventing me from upgrading to Jest v24 in some repos #7857

Closed

captain-yossarian pushed a commit to captain-yossarian/jest that referenced this pull request Jul 18, 2019

chore: migrate jest-util to TypeScript (jestjs#7844)

a714205

snyk-bot mentioned this pull request Dec 15, 2019

[Snyk] Upgrade babel-jest from 24.0.0 to 24.9.0 jakeherp/burger-builder#14

Open

This was referenced Mar 21, 2020

[Snyk] Upgrade: jest, jest-cli lwojcik/sc2pte-panel-frontend#88

Closed

[Snyk] Upgrade jest from 24.0.0 to 24.9.0 DavidKindler/burger-builder#47

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chore: migrate jest-util to TypeScript #7844

chore: migrate jest-util to TypeScript #7844

SimenB commented Feb 9, 2019

github-actions bot commented May 12, 2021

chore: migrate jest-util to TypeScript #7844

chore: migrate jest-util to TypeScript #7844

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SimenB commented Feb 9, 2019

Summary

Test plan

github-actions bot commented May 12, 2021