feat(jest-resolver): support file:// URLs (#15154)

Author: SimenB

CHANGELOG.md

@@ -26,6 +26,7 @@
 - `[jest-matcher-utils]` Add `SERIALIZABLE_PROPERTIES` to allow custom serialization of objects ([#14893](https://github.com/jestjs/jest/pull/14893))
 - `[jest-mock]` Add support for the Explicit Resource Management proposal to use the `using` keyword with `jest.spyOn(object, methodName)` ([#14895](https://github.com/jestjs/jest/pull/14895))
 - `[jest-reporters]` Add support for [DEC mode 2026](https://gist.github.com/christianparpart/d8a62cc1ab659194337d73e399004036) ([#15008](https://github.com/jestjs/jest/pull/15008))
+- `[jest-resolver]` Support `file://` URLs as paths ([#15154](https://github.com/jestjs/jest/pull/15154))
 - `[jest-runtime]` Exposing new modern timers function `jest.advanceTimersToFrame()` from `@jest/fake-timers` ([#14598](https://github.com/jestjs/jest/pull/14598))
 - `[jest-runtime]` Support `import.meta.filename` and `import.meta.dirname` (available from [Node 20.11](https://nodejs.org/en/blog/release/v20.11.0)) ([#14854](https://github.com/jestjs/jest/pull/14854))
 - `[jest-runtime]` Support `import.meta.resolve` ([#14930](https://github.com/jestjs/jest/pull/14930))

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

@@ -41,7 +41,7 @@ exports[`moduleNameMapper wrong array configuration 1`] = `
       12 | module.exports = () => 'test';
       13 |
 
-      at createNoMappedModuleFoundError (../../packages/jest-resolve/build/index.js:1172:17)
+      at createNoMappedModuleFoundError (../../packages/jest-resolve/build/index.js:1182:17)
       at Object.require (index.js:10:1)
       at Object.require (__tests__/index.js:10:20)"
 `;
@@ -71,7 +71,7 @@ exports[`moduleNameMapper wrong configuration 1`] = `
       12 | module.exports = () => 'test';
       13 |
 
-      at createNoMappedModuleFoundError (../../packages/jest-resolve/build/index.js:1172:17)
+      at createNoMappedModuleFoundError (../../packages/jest-resolve/build/index.js:1182:17)
       at Object.require (index.js:10:1)
       at Object.require (__tests__/index.js:10:20)"
 `;

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

@@ -26,7 +26,7 @@ exports[`shows a proper error from deep requires 1`] = `
       12 | test('dummy', () => {
       13 |   expect(1).toBe(1);
 
-      at Resolver._throwModNotFoundError (../../packages/jest-resolve/build/index.js:927:11)
+      at Resolver._throwModNotFoundError (../../packages/jest-resolve/build/index.js:937:11)
       at Object.<anonymous> (node_modules/discord.js/src/index.js:21:12)
       at Object.require (__tests__/test.js:10:1)"
 `;

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

@@ -37,7 +37,7 @@ exports[`show error message with matching files 1`] = `
         |                  ^
       9 |
 
-      at Resolver._throwModNotFoundError (../../packages/jest-resolve/build/index.js:927:11)
+      at Resolver._throwModNotFoundError (../../packages/jest-resolve/build/index.js:937:11)
       at Object.require (index.js:8:18)
       at Object.require (__tests__/test.js:8:11)"
 `;

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

@@ -7,6 +7,7 @@
  */
 
 import * as path from 'path';
+import {fileURLToPath, pathToFileURL} from 'url';
 import * as fs from 'graceful-fs';
 import {sync as resolveSync} from 'resolve';
 import {type IModuleMap, ModuleMap} from 'jest-haste-map';
@@ -152,6 +153,15 @@ describe('findNodeModule', () => {
     );
   });
 
+  it('supports file URLs', () => {
+    const path = pathToFileURL(__filename).href;
+    const newPath = Resolver.findNodeModule(path, {
+      basedir: '/',
+    });
+
+    expect(newPath).toBe(__filename);
+  });
+
   describe('conditions', () => {
     const conditionsRoot = path.resolve(__dirname, '../__mocks__/conditions');
 
@@ -456,6 +466,15 @@ describe('findNodeModuleAsync', () => {
       }),
     );
   });
+
+  it('supports file URLs', async () => {
+    const path = pathToFileURL(__filename).href;
+    const newPath = await Resolver.findNodeModuleAsync(path, {
+      basedir: '/',
+    });
+
+    expect(newPath).toBe(__filename);
+  });
 });
 
 describe('resolveModule', () => {

packages/jest-resolve/src/defaultResolver.ts

@@ -6,6 +6,7 @@
  */
 
 import {dirname, isAbsolute, resolve as pathResolve} from 'path';
+import {fileURLToPath} from 'url';
 import pnpResolver from 'jest-pnp-resolver';
 import {
   type SyncOpts as UpstreamResolveOptions,
@@ -132,6 +133,10 @@ function getPathInModule(
   path: string,
   options: UpstreamResolveOptionsWithConditions,
 ): string {
+  if (path.startsWith('file://')) {
+    path = fileURLToPath(path);
+  }
+
   if (shouldIgnoreRequestForExports(path)) {
     return path;
   }