fix(jest-mock): type constructed mocked class instances

CHANGELOG.md

@@ -11,6 +11,7 @@
 - `[expect, jest-message-util, jest-pattern, jest-regex-util, jest-util]` Revert `node:` protocol imports to restore webpack/browser-bundle compatibility ([#16167](https://github.com/jestjs/jest/pull/16167))
 - `[expect]` Widen `toMatchObject` and `objectContaining` parameter type from `Record<string, unknown>` to `object` so class instances are accepted ([#16196](https://github.com/jestjs/jest/pull/16196))
 - `[@jest-environment/jsdom-abstract]` Make `@types/jsdom` a peer dependency ([#16166](https://github.com/jestjs/jest/pull/16166))
+- `[jest-mock]` Type constructed mocked class instances returned by `ModuleMocker.generateFromMetadata()` as mocked objects ([#16212](https://github.com/jestjs/jest/pull/16212))
 - `[jest-runtime]` Fall back to native ESM when a `.js` file contains ESM syntax but has no `"type":"module"` marker ([#16152](https://github.com/jestjs/jest/pull/16152))
 - `[jest-runtime]` Support older test environments whose `moduleMocker` does not implement `clearMocksOnScope` ([#16169](https://github.com/jestjs/jest/pull/16169))
 

packages/jest-mock/__typetests__/ModuleMocker.test.ts

@@ -6,7 +6,12 @@
  */
 
 import {expect, test} from 'tstyche';
-import {type MockMetadata, type Mocked, ModuleMocker} from 'jest-mock';
+import {
+  type MockMetadata,
+  type Mocked,
+  type MockedObject,
+  ModuleMocker,
+} from 'jest-mock';
 
 class ExampleClass {
   memberA: Array<number>;
@@ -79,3 +84,13 @@ test('generateFromMetadata', () => {
   expect(exampleMock.propertyE).type.toBe<boolean>();
   expect(exampleMock.propertyF).type.toBe<symbol>();
 });
+
+test('generateFromMetadata constructs mocked class instances', () => {
+  const classMetadata = moduleMocker.getMetadata(ExampleClass);
+  const MockClass = moduleMocker.generateFromMetadata(classMetadata!);
+
+  const instance = new MockClass();
+
+  expect(instance).type.toBeAssignableTo<MockedObject<ExampleClass>>();
+  expect(instance.memberB.mock.calls).type.toBe<Array<[]>>();
+});

packages/jest-mock/src/index.ts

@@ -56,6 +56,7 @@ export type PropertyLikeKeys<T> = Exclude<
 export type MockedClass<T extends ClassLike> = MockInstance<
   (...args: ConstructorParameters<T>) => Mocked<InstanceType<T>>
 > &
+  (new (...args: ConstructorParameters<T>) => Mocked<InstanceType<T>>) &
   MockedObject<T>;
 
 export type MockedFunction<T extends FunctionLike> = MockInstance<T> &