Migrate @jest/reporters to TypeScript

[lorenzorapetti]

Summary

Built diff:

Details

diff --git c/packages/jest-reporters/build/Status.js w/packages/jest-reporters/build/Status.js
index 2be9fd56e..a22d7b86d 100644
--- c/packages/jest-reporters/build/Status.js
+++ w/packages/jest-reporters/build/Status.js
@@ -36,8 +36,6 @@ 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 RUNNING_TEXT = ' RUNS ';
 const RUNNING = _chalk().default.reset.inverse.yellow.bold(RUNNING_TEXT) + ' ';
@@ -69,7 +67,7 @@ class CurrentTestList {
 
   delete(testPath) {
     const record = this._array.find(
-      record => record && record.testPath === testPath
+      record => record !== null && record.testPath === testPath
     );
 
     this._array[this._array.indexOf(record || null)] = null;
@@ -92,7 +90,6 @@ class Status {
     this._done = false;
     this._emitScheduled = false;
     this._estimatedTime = 0;
-    this._height = 0;
     this._showStatus = false;
   }
 
@@ -111,7 +108,7 @@ class Status {
 
   runFinished() {
     this._done = true;
-    clearInterval(this._interval);
+    if (this._interval) clearInterval(this._interval);
 
     this._emit();
   }
@@ -126,7 +123,7 @@ class Status {
     }
   }
 
-  testFinished(config, testResult, aggregatedResults) {
+  testFinished(_config, testResult, aggregatedResults) {
     const testFilePath = testResult.testFilePath;
     this._aggregatedResults = aggregatedResults;
 
@@ -145,7 +142,7 @@ class Status {
         clear: '',
         content: ''
       };
-    } // $FlowFixMe
+    }
 
     const width = process.stdout.columns;
     let content = '\n';
@@ -199,9 +196,7 @@ class Status {
 
   _emit() {
     this._cache = null;
-    this._lastUpdated = Date.now();
-
-    this._callback();
+    if (this._callback) this._callback();
   }
 
   _debouncedEmit() {
diff --git c/packages/jest-reporters/build/base_reporter.js w/packages/jest-reporters/build/base_reporter.js
index d04e4223d..d3718c2fe 100644
--- c/packages/jest-reporters/build/base_reporter.js
+++ w/packages/jest-reporters/build/base_reporter.js
@@ -20,8 +20,6 @@ function _jestUtil() {
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
- *
- *
  */
 const preRunMessageRemove = _jestUtil().preRunMessage.remove;
 
@@ -30,15 +28,15 @@ class BaseReporter {
     process.stderr.write(message + '\n');
   }
 
-  onRunStart(results, options) {
+  onRunStart(_results, _options) {
     preRunMessageRemove(process.stderr);
   }
 
-  onTestResult(test, testResult, results) {}
+  onTestResult(_test, _testResult, _results) {}
 
-  onTestStart(test) {}
+  onTestStart(_test) {}
 
-  onRunComplete(contexts, aggregatedResults) {}
+  onRunComplete(_contexts, _aggregatedResults) {}
 
   _setError(error) {
     this._error = error;
diff --git c/packages/jest-reporters/build/coverage_reporter.js w/packages/jest-reporters/build/coverage_reporter.js
index 47514835a..9b660ab6c 100644
--- c/packages/jest-reporters/build/coverage_reporter.js
+++ w/packages/jest-reporters/build/coverage_reporter.js
@@ -5,6 +5,16 @@ Object.defineProperty(exports, '__esModule', {
 });
 exports.default = void 0;
 
+function _path() {
+  const data = _interopRequireDefault(require('path'));
+
+  _path = function _path() {
+    return data;
+  };
+
+  return data;
+}
+
 function _jestUtil() {
   const data = require('jest-util');
 
@@ -65,18 +75,6 @@ function _jestWorker() {
   return data;
 }
 
-var _base_reporter = _interopRequireDefault(require('./base_reporter'));
-
-function _path() {
-  const data = _interopRequireDefault(require('path'));
-
-  _path = function _path() {
-    return data;
-  };
-
-  return data;
-}
-
 function _glob() {
   const data = _interopRequireDefault(require('glob'));
 
@@ -87,6 +85,8 @@ function _glob() {
   return data;
 }
 
+var _base_reporter = _interopRequireDefault(require('./base_reporter'));
+
 function _interopRequireDefault(obj) {
   return obj && obj.__esModule ? obj : {default: obj};
 }
@@ -136,7 +136,7 @@ class CoverageReporter extends _base_reporter.default {
     this._options = options || {};
   }
 
-  onTestResult(test, testResult, aggregatedResults) {
+  onTestResult(_test, testResult, _aggregatedResults) {
     if (testResult.coverage) {
       this._coverageMap.merge(testResult.coverage); // Remove coverage data to free up some memory.
 
@@ -147,9 +147,9 @@ class CoverageReporter extends _base_reporter.default {
         try {
           const coverage = this._coverageMap.fileCoverageFor(sourcePath);
 
-          var _coverage$toJSON = coverage.toJSON();
+          var _ref = coverage.toJSON();
 
-          inputSourceMap = _coverage$toJSON.inputSourceMap;
+          inputSourceMap = _ref.inputSourceMap;
         } finally {
           if (inputSourceMap) {
             this._sourceMapStore.registerMap(sourcePath, inputSourceMap);
@@ -265,11 +265,11 @@ class CoverageReporter extends _base_reporter.default {
       const instrumentation = files.map(
         /*#__PURE__*/
         (function() {
-          var _ref = _asyncToGenerator(function*(fileObj) {
+          var _ref2 = _asyncToGenerator(function*(fileObj) {
             const filename = fileObj.path;
             const config = fileObj.config;
 
-            if (!_this2._coverageMap.data[filename]) {
+            if (!_this2._coverageMap.data[filename] && 'worker' in worker) {
               try {
                 const result = yield worker.worker({
                   config,
@@ -303,7 +303,7 @@ class CoverageReporter extends _base_reporter.default {
           });
 
           return function(_x) {
-            return _ref.apply(this, arguments);
+            return _ref2.apply(this, arguments);
           };
         })()
       );
@@ -318,7 +318,7 @@ class CoverageReporter extends _base_reporter.default {
         (0, _jestUtil().clearLine)(process.stderr);
       }
 
-      if (worker && typeof worker.end === 'function') {
+      if (worker && 'end' in worker && typeof worker.end === 'function') {
         worker.end();
       }
     })();
diff --git c/packages/jest-reporters/build/coverage_worker.js w/packages/jest-reporters/build/coverage_worker.js
index 3dd49e94d..67241afd2 100644
--- c/packages/jest-reporters/build/coverage_worker.js
+++ w/packages/jest-reporters/build/coverage_worker.js
@@ -4,31 +4,62 @@ Object.defineProperty(exports, '__esModule', {
   value: true
 });
 exports.worker = worker;
+Object.defineProperty(exports, 'CoverageWorkerResult', {
+  enumerable: true,
+  get: function get() {
+    return _generateEmptyCoverage.CoverageWorkerResult;
+  }
+});
 
-function _exit() {
-  const data = _interopRequireDefault(require('exit'));
+function _fs() {
+  const data = _interopRequireDefault(require('fs'));
 
-  _exit = function _exit() {
+  _fs = function _fs() {
     return data;
   };
 
   return data;
 }
 
-function _fs() {
-  const data = _interopRequireDefault(require('fs'));
+function _exit() {
+  const data = _interopRequireDefault(require('exit'));
 
-  _fs = function _fs() {
+  _exit = function _exit() {
     return data;
   };
 
   return data;
 }
 
-var _generateEmptyCoverage = _interopRequireDefault(
+var _generateEmptyCoverage = _interopRequireWildcard(
   require('./generateEmptyCoverage')
 );
 
+function _interopRequireWildcard(obj) {
+  if (obj && obj.__esModule) {
+    return obj;
+  } else {
+    var newObj = {};
+    if (obj != null) {
+      for (var key in obj) {
+        if (Object.prototype.hasOwnProperty.call(obj, key)) {
+          var desc =
+            Object.defineProperty && Object.getOwnPropertyDescriptor
+              ? Object.getOwnPropertyDescriptor(obj, key)
+              : {};
+          if (desc.get || desc.set) {
+            Object.defineProperty(newObj, key, desc);
+          } else {
+            newObj[key] = obj[key];
+          }
+        }
+      }
+    }
+    newObj.default = obj;
+    return newObj;
+  }
+}
+
 function _interopRequireDefault(obj) {
   return obj && obj.__esModule ? obj : {default: obj};
 }
@@ -38,8 +69,6 @@ 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.
- *
- *
  */
 // Make sure uncaught errors are logged before we exit.
 process.on('uncaughtException', err => {
diff --git c/packages/jest-reporters/build/default_reporter.js w/packages/jest-reporters/build/default_reporter.js
index ead2efde2..713ca2b45 100644
--- c/packages/jest-reporters/build/default_reporter.js
+++ w/packages/jest-reporters/build/default_reporter.js
@@ -44,11 +44,7 @@ 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$Writable, tty$WriteStream */
 const TITLE_BULLET = _chalk().default.bold('\u25cf ');
 
 class DefaultReporter extends _base_reporter.default {
@@ -109,7 +105,7 @@ class DefaultReporter extends _base_reporter.default {
           }, 100);
         }
       }
-    }; // $FlowFixMe
+    };
 
     stream.write = chunk => {
       buffer.push(chunk);
@@ -185,10 +181,9 @@ class DefaultReporter extends _base_reporter.default {
   onRunComplete() {
     this.forceFlushBufferedOutput();
 
-    this._status.runFinished(); // $FlowFixMe
-
-    process.stdout.write = this._out; // $FlowFixMe
+    this._status.runFinished();
 
+    process.stdout.write = this._out;
     process.stderr.write = this._err;
     (0, _jestUtil().clearLine)(process.stderr);
   }
@@ -216,7 +211,7 @@ class DefaultReporter extends _base_reporter.default {
     this._status.testFinished(config, testResult, aggregatedResults);
   }
 
-  printTestFileHeader(testPath, config, result) {
+  printTestFileHeader(_testPath, config, result) {
     this.log(
       (0, _get_result_header.default)(result, this._globalConfig, config)
     );
@@ -236,7 +231,7 @@ class DefaultReporter extends _base_reporter.default {
     }
   }
 
-  printTestFileFailureMessage(testPath, config, result) {
+  printTestFileFailureMessage(_testPath, _config, result) {
     if (result.failureMessage) {
       this.log(result.failureMessage);
     }
diff --git c/packages/jest-reporters/build/generateEmptyCoverage.js w/packages/jest-reporters/build/generateEmptyCoverage.js
index 59e564dc7..db084dfab 100644
--- c/packages/jest-reporters/build/generateEmptyCoverage.js
+++ w/packages/jest-reporters/build/generateEmptyCoverage.js
@@ -40,9 +40,9 @@ function _transform() {
  *
  * This source code is licensed under the MIT license found in the
  * LICENSE file in the root directory of this source tree.
- *
- *
  */
+// TODO: Remove this
+/// <reference path="./istanbul-lib-coverage.d.ts" />
 const FileCoverage = _istanbulLibCoverage().classes.FileCoverage;
 
 function _default(source, filename, globalConfig, config, changedFiles) {
diff --git c/packages/jest-reporters/build/get_result_header.js w/packages/jest-reporters/build/get_result_header.js
index 2e5ec69b2..12f2214d1 100644
--- c/packages/jest-reporters/build/get_result_header.js
+++ w/packages/jest-reporters/build/get_result_header.js
@@ -26,8 +26,6 @@ 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 LONG_TEST_COLOR = _chalk().default.reset.bold.bgRed; // Explicitly reset for these messages since they can get written out in the
 // middle of error logging
diff --git c/packages/jest-reporters/build/get_snapshot_status.js w/packages/jest-reporters/build/get_snapshot_status.js
index 5f7ce81a6..7248fa8a0 100644
--- c/packages/jest-reporters/build/get_snapshot_status.js
+++ w/packages/jest-reporters/build/get_snapshot_status.js
@@ -34,8 +34,6 @@ 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 ARROW = ' \u203A ';
 const DOT = ' \u2022 ';
diff --git c/packages/jest-reporters/build/get_snapshot_summary.js w/packages/jest-reporters/build/get_snapshot_summary.js
index c4661a026..5c8ddbac3 100644
--- c/packages/jest-reporters/build/get_snapshot_summary.js
+++ w/packages/jest-reporters/build/get_snapshot_summary.js
@@ -36,8 +36,6 @@ 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 ARROW = ' \u203A ';
 const DOWN_ARROW = ' \u21B3 ';
diff --git c/packages/jest-reporters/build/istanbul-api.d.js w/packages/jest-reporters/build/istanbul-api.d.js
new file mode 100644
index 000000000..ad9a93a7c
--- /dev/null
+++ w/packages/jest-reporters/build/istanbul-api.d.js
@@ -0,0 +1 @@
+'use strict';
diff --git c/packages/jest-reporters/build/istanbul-lib-coverage.d.js w/packages/jest-reporters/build/istanbul-lib-coverage.d.js
new file mode 100644
index 000000000..ad9a93a7c
--- /dev/null
+++ w/packages/jest-reporters/build/istanbul-lib-coverage.d.js
@@ -0,0 +1 @@
+'use strict';
diff --git c/packages/jest-reporters/build/node-notifier.d.js w/packages/jest-reporters/build/node-notifier.d.js
new file mode 100644
index 000000000..ad9a93a7c
--- /dev/null
+++ w/packages/jest-reporters/build/node-notifier.d.js
@@ -0,0 +1 @@
+'use strict';
diff --git c/packages/jest-reporters/build/notify_reporter.js w/packages/jest-reporters/build/notify_reporter.js
index 132c0102b..815606f74 100644
--- c/packages/jest-reporters/build/notify_reporter.js
+++ w/packages/jest-reporters/build/notify_reporter.js
@@ -5,30 +5,30 @@ Object.defineProperty(exports, '__esModule', {
 });
 exports.default = void 0;
 
-function _exit() {
-  const data = _interopRequireDefault(require('exit'));
+function _path() {
+  const data = _interopRequireDefault(require('path'));
 
-  _exit = function _exit() {
+  _path = function _path() {
     return data;
   };
 
   return data;
 }
 
-function _path() {
-  const data = _interopRequireDefault(require('path'));
+function _util() {
+  const data = _interopRequireDefault(require('util'));
 
-  _path = function _path() {
+  _util = function _util() {
     return data;
   };
 
   return data;
 }
 
-function _util() {
-  const data = _interopRequireDefault(require('util'));
+function _exit() {
+  const data = _interopRequireDefault(require('exit'));
 
-  _util = function _util() {
+  _exit = function _exit() {
     return data;
   };
 
diff --git c/packages/jest-reporters/build/summary_reporter.js w/packages/jest-reporters/build/summary_reporter.js
index f0163e6c3..6fa4388df 100644
--- c/packages/jest-reporters/build/summary_reporter.js
+++ w/packages/jest-reporters/build/summary_reporter.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.
- *
- *
  */
 const TEST_SUMMARY_THRESHOLD = 20;
 const NPM_EVENTS = new Set([
@@ -149,7 +147,7 @@ class SummaryReporter extends _base_reporter.default {
       snapshots.updated
     ) {
       let updateCommand;
-      const event = process.env.npm_lifecycle_event;
+      const event = process.env.npm_lifecycle_event || '';
       const prefix = NPM_EVENTS.has(event) ? '' : 'run ';
       const isYarn =
         typeof process.env.npm_config_user_agent === 'string' &&
diff --git c/packages/jest-reporters/build/types.js w/packages/jest-reporters/build/types.js
new file mode 100644
index 000000000..d222427bd
--- /dev/null
+++ w/packages/jest-reporters/build/types.js
@@ -0,0 +1,3 @@
+'use strict';
+
+var _coverage_worker = require('./coverage_worker');
diff --git c/packages/jest-reporters/build/utils.js w/packages/jest-reporters/build/utils.js
index 04bd7b987..5dbf0c679 100644
--- c/packages/jest-reporters/build/utils.js
+++ w/packages/jest-reporters/build/utils.js
@@ -54,8 +54,6 @@ 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 PROGRESS_BAR_WIDTH = 40;
 
diff --git c/packages/jest-reporters/build/verbose_reporter.js w/packages/jest-reporters/build/verbose_reporter.js
index 7d1d3960d..55ebafe31 100644
--- c/packages/jest-reporters/build/verbose_reporter.js
+++ w/packages/jest-reporters/build/verbose_reporter.js
@@ -36,8 +36,6 @@ 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 ICONS = _jestUtil().specialChars.ICONS;
 

Related PRs

• @types/node-notifier: [@types/node-notifier] Update typings DefinitelyTyped/DefinitelyTyped#33419
• @types/istanbul-lib-coverage: [@types/istanbul-lib-coverage] Update typings DefinitelyTyped/DefinitelyTyped#33646

Test plan

Green CI

[natealcedo]

I dont think the tests are part of this migration.

Regarding this, you could probably raise a pr for this if it isn't too difficult. I did the same thing with DefinitelyTyped/DefinitelyTyped#33351

@types/node-notifier doesn't have the typings for actions used here

[SimenB]

Awesome start!

Some PRs to definitelytyped fixing their types would be awesome 🙂

[lorenzorapetti]

Regarding this, you could probably raise a pr for this if it isn't too difficult.

Some PRs to definitelytyped fixing their types would be awesome 🙂

Sure thing! I will make the PRs soon. I'm also updating all the underscore properties.

[SimenB]

Feel free to add some definition files to your PR as you work - both to avoid waiting for definitelytyped to merge and so you can verify the changes does the job 🙂

[lorenzorapetti]

Ok, that was quite challenging 😅 I have only one test failing though, so i'm almost there. @SimenB I'll continue as soon as i'm done working

For now i've done the typings for node-notifier, istanbul-lib-coverage and istanbul-api (for this one i wrote only the strictly necessary types for everything to work). This weekend i'll try to create the PRs to DefinitelyTyped.

[SimenB]

Awesome! Happy to land this in Jest including typings at first, then go back and remove them once definitelytyped is updated

[lorenzorapetti]

I've finally resolved all the failing tests and wrong typings ✨ Now it should be ready to merge

[SimenB]

This looks awesome! left some nits and questions

[SimenB]

This is fantastic, thank you so much! Looking forward to seeing those PRs to DefinitelyTyped be merged so we can get rid of the inline typings here

[SimenB]

/cc @thymikee @jeysal PTAL

[thymikee]

👍

[github-actions]

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