jestjs · SimenB · Feb 9, 2022 · Mar 2, 2021 · Oct 9, 2021 · Oct 11, 2021
diff --git a/.eslintrc.js b/.eslintrc.js
@@ -35,10 +35,6 @@ module.exports = {
       rules: {
         '@typescript-eslint/array-type': ['error', {default: 'generic'}],
         '@typescript-eslint/ban-types': 'error',
-        '@typescript-eslint/no-implicit-any-catch': [
-          'error',
-          {allowExplicitAny: true},
-        ],
         '@typescript-eslint/no-unused-vars': [
           'error',
           {argsIgnorePattern: '^_'},

diff --git a/.github/workflows/nodejs.yml b/.github/workflows/nodejs.yml
@@ -58,7 +58,7 @@ jobs:
         run: yarn build
       - name: test typings
         run: yarn test-types
-      - name: verify TypeScript@3.8 compatibility
+      - name: verify TypeScript@4.2 compatibility
         run: yarn verify-old-ts
       - name: verify Yarn PnP compatibility
         run: yarn verify-pnp

diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -10,6 +10,7 @@
 ### Chore & Maintenance
 
 - `[*]` [**BREAKING**] Drop support for Node v10 and v15 and target first LTS `16.13.0` ([#12220](https://github.com/facebook/jest/pull/12220))
+- `[*]` [**BREAKING**] Drop support for `typescript@3.8`, minimum version is now `4.2` ([#11142](https://github.com/facebook/jest/pull/11142))
 - `[@jest/core]` Use `index.ts` instead of `jest.ts` as main export ([#12329](https://github.com/facebook/jest/pull/12329))
 - `[jest]` Use `index.ts` instead of `jest.ts` as main export ([#12329](https://github.com/facebook/jest/pull/12329))
 

diff --git a/e2e/__tests__/resolveConditions.test.ts b/e2e/__tests__/resolveConditions.test.ts
@@ -21,7 +21,7 @@ onNodeVersions('>=12.16.0', () => {
       });
       try {
         expect(exitCode).toBe(0);
-      } catch (error: unknown) {
+      } catch (error) {
         console.log(`Test failed on iteration ${i + 1}`);
         throw error;
       }

diff --git a/package.json b/package.json
@@ -13,7 +13,7 @@
     "@jest/globals": "workspace:*",
     "@jest/test-utils": "workspace:*",
     "@tsconfig/node12": "^1.0.9",
-    "@tsd/typescript": "~4.1.5",
+    "@tsd/typescript": "~4.5.5",
     "@types/babel__core": "^7.0.0",
     "@types/babel__generator": "^7.0.0",
     "@types/babel__template": "^7.0.0",
@@ -55,7 +55,7 @@
     "jest-changed-files": "workspace:*",
     "jest-junit": "^13.0.0",
     "jest-mock": "workspace:*",
-    "jest-runner-tsd": "^2.0.0",
+    "jest-runner-tsd": "^3.0.0",
     "jest-silent-reporter": "^0.5.0",
     "jest-snapshot": "workspace:*",
     "jest-watch-typeahead": "^0.6.0",
@@ -79,7 +79,7 @@
     "tempy": "^1.0.0",
     "throat": "^6.0.1",
     "ts-node": "^9.0.0",
-    "type-fest": "^1.1.1",
+    "type-fest": "^2.11.2",
     "typescript": "^4.0.2",
     "which": "^2.0.1"
   },

diff --git a/packages/expect/package.json b/packages/expect/package.json
@@ -26,7 +26,7 @@
   },
   "devDependencies": {
     "@jest/test-utils": "^27.5.1",
-    "@tsd/typescript": "~4.1.5",
+    "@tsd/typescript": "~4.5.5",
     "chalk": "^4.0.0",
     "fast-check": "^2.0.0",
     "immutable": "^4.0.0",

diff --git a/packages/expect/src/__tests__/isError.test.ts b/packages/expect/src/__tests__/isError.test.ts
@@ -43,7 +43,7 @@ describe('isError', () => {
     testErrorFromDifferentContext((win: Window) => {
       try {
         win.document.querySelectorAll('');
-      } catch (e: unknown) {
+      } catch (e) {
         return e;
       }
       return null;

diff --git a/packages/expect/src/toThrowMatchers.ts b/packages/expect/src/toThrowMatchers.ts
@@ -107,7 +107,7 @@ export const createMatcher = (
       } else {
         try {
           received();
-        } catch (e: unknown) {
+        } catch (e) {
           thrown = getThrown(e);
         }
       }

diff --git a/packages/jest-circus/src/run.ts b/packages/jest-circus/src/run.ts
@@ -157,7 +157,7 @@ const _callCircusHook = async ({
       timeout,
     });
     await dispatch({describeBlock, hook, name: 'hook_success', test});
-  } catch (error: unknown) {
+  } catch (error) {
     await dispatch({describeBlock, error, hook, name: 'hook_failure', test});
   }
 };
@@ -180,7 +180,7 @@ const _callCircusTest = async (
       timeout,
     });
     await dispatch({name: 'test_fn_success', test});
-  } catch (error: unknown) {
+  } catch (error) {
     await dispatch({error, name: 'test_fn_failure', test});
   }
 };

diff --git a/packages/jest-circus/src/types.ts b/packages/jest-circus/src/types.ts
@@ -7,7 +7,7 @@
 
 // Used as type
 import type {Circus} from '@jest/types';
-import expect = require('expect');
+import type expect = require('expect');
 
 export const STATE_SYM = Symbol(
   'JEST_STATE_SYMBOL',

diff --git a/packages/jest-circus/src/utils.ts b/packages/jest-circus/src/utils.ts
@@ -253,7 +253,7 @@ export const callAsyncCircusFn = (
     } else {
       try {
         returnedValue = fn.call(testContext);
-      } catch (error: unknown) {
+      } catch (error) {
         reject(error);
         return;
       }

diff --git a/packages/jest-config/src/readConfigFileAndSetRootDir.ts b/packages/jest-config/src/readConfigFileAndSetRootDir.ts
@@ -39,7 +39,7 @@ export default async function readConfigFileAndSetRootDir(
     } else {
       configObject = await requireOrImportModule<any>(configPath);
     }
-  } catch (error: unknown) {
+  } catch (error) {
     if (isTS) {
       throw new Error(
         `Jest: Failed to parse the TypeScript config file ${configPath}\n` +

diff --git a/packages/jest-core/src/TestScheduler.ts b/packages/jest-core/src/TestScheduler.ts
@@ -286,7 +286,7 @@ class TestScheduler {
             );
           }
         }
-      } catch (error: unknown) {
+      } catch (error) {
         if (!watcher.isInterrupted()) {
           throw error;
         }

diff --git a/packages/jest-core/src/cli/index.ts b/packages/jest-core/src/cli/index.ts
@@ -175,7 +175,7 @@ const _run10000 = async (
       filterSetupPromise = (async () => {
         try {
           await rawFilter.setup();
-        } catch (err: unknown) {
+        } catch (err) {
           return err;
         }
         return undefined;

diff --git a/packages/jest-core/src/runGlobalHook.ts b/packages/jest-core/src/runGlobalHook.ts
@@ -58,7 +58,7 @@ export default async function runGlobalHook({
             await globalModule(globalConfig);
           },
         );
-      } catch (error: unknown) {
+      } catch (error) {
         if (util.types.isNativeError(error)) {
           error.message = `Jest: Got error running ${moduleName} - ${modulePath}, reason: ${error.message}`;
 

diff --git a/packages/jest-fake-timers/src/legacyFakeTimers.ts b/packages/jest-fake-timers/src/legacyFakeTimers.ts
@@ -308,7 +308,7 @@ export default class FakeTimers<TimerRef> {
     let errThrown = false;
     try {
       cb();
-    } catch (e: unknown) {
+    } catch (e) {
       errThrown = true;
       cbErr = e;
     }

diff --git a/packages/jest-globals/src/index.ts b/packages/jest-globals/src/index.ts
@@ -7,7 +7,7 @@
 
 import type {Jest} from '@jest/environment';
 import type {Global} from '@jest/types';
-import importedExpect = require('expect');
+import type importedExpect = require('expect');
 
 export declare const jest: Jest;
 

diff --git a/packages/jest-jasmine2/src/PCancelable.ts b/packages/jest-jasmine2/src/PCancelable.ts
@@ -75,7 +75,7 @@ export default class PCancelable<T> implements PromiseLike<T> {
     if (typeof this._cancel === 'function') {
       try {
         this._cancel();
-      } catch (err: unknown) {
+      } catch (err) {
         this._reject(err);
       }
     }

diff --git a/packages/jest-jasmine2/src/jasmineAsyncInstall.ts b/packages/jest-jasmine2/src/jasmineAsyncInstall.ts
@@ -212,7 +212,7 @@ function makeConcurrent(
           `Jest: concurrent test "${spec.getFullName()}" must return a Promise.`,
         );
       });
-    } catch (error: unknown) {
+    } catch (error) {
       promise = Promise.reject(error);
     }
     // Avoid triggering the uncaught promise rejection handler in case the test errors before

diff --git a/packages/jest-jasmine2/src/types.ts b/packages/jest-jasmine2/src/types.ts
@@ -7,7 +7,7 @@
 
 import type {AssertionError} from 'assert';
 import type {Config} from '@jest/types';
-import expect = require('expect');
+import type expect = require('expect');
 import type CallTracker from './jasmine/CallTracker';
 import type Env from './jasmine/Env';
 import type JsApiReporter from './jasmine/JsApiReporter';

diff --git a/packages/jest-mock/src/index.ts b/packages/jest-mock/src/index.ts
@@ -672,7 +672,7 @@ export class ModuleMocker {
 
             return undefined;
           })();
-        } catch (error: unknown) {
+        } catch (error) {
           // Store the thrown error so we can record it, then re-throw it.
           thrownError = error;
           callDidThrowError = true;

diff --git a/packages/jest-resolve/src/resolver.ts b/packages/jest-resolve/src/resolver.ts
@@ -123,7 +123,7 @@ export default class Resolver {
         paths: paths ? (nodePaths || []).concat(paths) : nodePaths,
         rootDir: options.rootDir,
       });
-    } catch (e: unknown) {
+    } catch (e) {
       if (options.throwIfNotFound) {
         throw e;
       }

diff --git a/packages/jest-runner/src/types.ts b/packages/jest-runner/src/types.ts
@@ -5,7 +5,7 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-import Emittery = require('emittery');
+import type Emittery = require('emittery');
 import type {JestEnvironment} from '@jest/environment';
 import type {
   SerializableError,

diff --git a/packages/jest-runtime/src/index.ts b/packages/jest-runtime/src/index.ts
@@ -5,7 +5,7 @@
  * LICENSE file in the root directory of this source tree.
  */
 
-import * as nativeModule from 'module';
+import nativeModule = require('module');
 import * as path from 'path';
 import {URL, fileURLToPath, pathToFileURL} from 'url';
 import {
@@ -512,7 +512,7 @@ export default class Runtime {
         this._esmoduleRegistry.set(cacheKey, module);
 
         transformResolve();
-      } catch (error: unknown) {
+      } catch (error) {
         transformReject(error);
         throw error;
       }
@@ -838,7 +838,7 @@ export default class Runtime {
         options,
         moduleRegistry,
       );
-    } catch (error: unknown) {
+    } catch (error) {
       moduleRegistry.delete(modulePath);
       throw error;
     }
@@ -1013,7 +1013,7 @@ export default class Runtime {
       } else {
         return this.requireModule<T>(from, moduleName);
       }
-    } catch (e: unknown) {
+    } catch (e) {
       const moduleNotFound = Resolver.tryCastModuleNotFoundError(e);
       if (moduleNotFound) {
         if (
@@ -1279,7 +1279,7 @@ export default class Runtime {
       return this._resolveModule(from, moduleName, {
         conditions: this.cjsConditions,
       });
-    } catch (err: unknown) {
+    } catch (err) {
       const module = this._resolver.getMockModule(from, moduleName);
 
       if (module) {
@@ -1718,7 +1718,7 @@ export default class Runtime {
     let modulePath;
     try {
       modulePath = this._resolveModule(from, moduleName, options);
-    } catch (e: unknown) {
+    } catch (e) {
       const manualMock = this._resolver.getMockModule(from, moduleName);
       if (manualMock) {
         this._shouldMockModuleCache.set(moduleID, true);

diff --git a/packages/jest-snapshot/src/index.ts b/packages/jest-snapshot/src/index.ts
@@ -511,7 +511,7 @@ const _toThrowErrorMatchingSnapshot = (
   } else {
     try {
       received();
-    } catch (e: unknown) {
+    } catch (e) {
       error = e;
     }
   }

diff --git a/packages/jest-types/package.json b/packages/jest-types/package.json
@@ -27,7 +27,7 @@
     "chalk": "^4.0.0"
   },
   "devDependencies": {
-    "@tsd/typescript": "~4.1.5",
+    "@tsd/typescript": "~4.5.5",
     "tsd-lite": "^0.5.1"
   },
   "publishConfig": {

diff --git a/scripts/verifyOldTs.js b/scripts/verifyOldTs.js
@@ -16,25 +16,25 @@ const tempy = require('tempy');
 
 const jestDirectory = path.resolve(__dirname, '../packages/jest');
 
+/* eslint-disable sort-keys */
 const tsConfig = {
+  extends: '@tsconfig/node12/tsconfig.json',
   compilerOptions: {
     esModuleInterop: false,
-    lib: ['es2018'],
-    module: 'commonjs',
     moduleResolution: 'node',
     noEmit: true,
-    strict: true,
-    target: 'es5',
   },
 };
+/* eslint-enable */
+
 const cwd = tempy.directory();
 
-const tsVersion = '3.8';
+const tsVersion = '4.2';
 
 try {
   fs.writeFileSync(path.join(cwd, '.yarnrc.yml'), 'nodeLinker: node-modules\n');
   execa.sync('yarn', ['init', '--yes'], {cwd, stdio: 'inherit'});
-  execa.sync('yarn', ['add', `typescript@~${tsVersion}`], {
+  execa.sync('yarn', ['add', `typescript@~${tsVersion}`, '@tsconfig/node12'], {
     cwd,
     stdio: 'inherit',
   });