chore(jest-resolve): improve types

CHANGELOG.md

@@ -15,6 +15,7 @@
 
 - `[jest-jasmine2]` Convert `PCancelable` to TypeScript ([#10215](https://github.com/facebook/jest/pull/10215))
 - `[jest-jasmine2]` Refine typings of `queueRunner` ([#10215](https://github.com/facebook/jest/pull/10215))
+- `[jest-resolve]` Improve types ([#10239](https://github.com/facebook/jest/pull/10239))
 
 ### Performance
 

e2e/__tests__/__snapshots__/moduleNameMapper.test.ts.snap

@@ -41,7 +41,7 @@ FAIL __tests__/index.js
       12 | module.exports = () => 'test';
       13 | 
 
-      at createNoMappedModuleFoundError (../../packages/jest-resolve/build/index.js:553:17)
+      at createNoMappedModuleFoundError (../../packages/jest-resolve/build/index.js:552:17)
       at Object.require (index.js:10:1)
 `;
 
@@ -70,6 +70,6 @@ FAIL __tests__/index.js
       12 | module.exports = () => 'test';
       13 | 
 
-      at createNoMappedModuleFoundError (../../packages/jest-resolve/build/index.js:553:17)
+      at createNoMappedModuleFoundError (../../packages/jest-resolve/build/index.js:552:17)
       at Object.require (index.js:10:1)
 `;

e2e/__tests__/__snapshots__/resolveNoFileExtensions.test.ts.snap

@@ -37,6 +37,6 @@ FAIL __tests__/test.js
         |                  ^
       9 | 
 
-      at Resolver.resolveModule (../../packages/jest-resolve/build/index.js:308:11)
+      at Resolver.resolveModule (../../packages/jest-resolve/build/index.js:307:11)
       at Object.require (index.js:8:18)
 `;

packages/jest-resolve/src/ModuleNotFoundError.ts

@@ -10,7 +10,7 @@ import type {Config} from '@jest/types';
 import slash = require('slash');
 
 export default class ModuleNotFoundError extends Error {
-  code = 'MODULE_NOT_FOUND';
+  public code = 'MODULE_NOT_FOUND';
   public hint?: string;
   public requireStack?: Array<Config.Path>;
   public siblingWithSimilarExtensionFound?: boolean;
@@ -31,11 +31,11 @@ export default class ModuleNotFoundError extends Error {
 
     let message = this._originalMessage;
 
-    if (this?.requireStack?.length && this!.requireStack!.length > 1) {
+    if (this.requireStack?.length && this.requireStack.length > 1) {
       message += `
 
 Require stack:
-  ${(this.requireStack as Array<string>)
+  ${this.requireStack
     .map(p => p.replace(`${rootDir}${path.sep}`, ''))
     .map(slash)
     .join('\n  ')}

packages/jest-resolve/src/__mocks__/userResolver.d.ts

@@ -0,0 +1,16 @@
+/**
+ * Copyright (c) Facebook, Inc. and its affiliates. 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.
+ */
+
+import defaultResolver from '../defaultResolver';
+
+// todo: can be replaced with jest.MockedFunction
+declare const userResolver: jest.MockInstance<
+  ReturnType<typeof defaultResolver>,
+  Parameters<typeof defaultResolver>
+>;
+
+export default userResolver;

packages/jest-resolve/src/__tests__/resolve.test.ts

@@ -10,11 +10,10 @@ import * as path from 'path';
 import * as fs from 'graceful-fs';
 import {ModuleMap} from 'jest-haste-map';
 import Resolver = require('../');
-// @ts-expect-error: js file
 import userResolver from '../__mocks__/userResolver';
 import nodeModulesPaths from '../nodeModulesPaths';
 import defaultResolver from '../defaultResolver';
-import {ResolverConfig} from '../types';
+import type {ResolverConfig} from '../types';
 
 jest.mock('../__mocks__/userResolver');
 

packages/jest-resolve/src/defaultResolver.ts

@@ -21,11 +21,19 @@ type ResolverOptions = {
   rootDir?: Config.Path;
 };
 
+declare global {
+  namespace NodeJS {
+    export interface ProcessVersions {
+      // the "pnp" version named isn't in DefinitelyTyped
+      pnp?: unknown;
+    }
+  }
+}
+
 export default function defaultResolver(
   path: Config.Path,
   options: ResolverOptions,
 ): Config.Path {
-  // @ts-expect-error: the "pnp" version named isn't in DefinitelyTyped
   if (process.versions.pnp) {
     return pnpResolver(path, options);
   }

packages/jest-resolve/src/index.ts

@@ -192,7 +192,6 @@ class Resolver {
       });
 
     if (!skipResolution) {
-      // @ts-expect-error: the "pnp" version named isn't in DefinitelyTyped
       module = resolveNodeModule(moduleName, Boolean(process.versions.pnp));
 
       if (module) {
@@ -471,7 +470,7 @@ const createNoMappedModuleFoundError = (
   mapModuleName: (moduleName: string) => string,
   mappedModuleName: string | Array<string>,
   regex: RegExp,
-  resolver?: Function | string | null,
+  resolver?: ((...args: Array<unknown>) => unknown) | string | null,
 ) => {
   const mappedAs = Array.isArray(mappedModuleName)
     ? JSON.stringify(mappedModuleName.map(mapModuleName), null, 2)

packages/jest-resolve/src/isBuiltinModule.ts

@@ -8,9 +8,7 @@
 import module = require('module');
 
 // "private" api
-declare const process: {
-  binding(type: string): {};
-};
+declare const process: NodeJS.Process & {binding(type: string): {}};
 
 const EXPERIMENTAL_MODULES = ['worker_threads'];