testing_something.ts

import { orm } from '@orm';
// Other needed imports and operations...

describe('Block description', () => {
    // Type error restoring the mock (mocking strategy #1)...
    test('whatever test description.', async (done) => {
        // Creating the spyOn...
        jest.spyOn(orm.controllers, 'enableUserAccount')
        // Mocking the function...
        orm.controllers.enableUserAccount = jest
            .fn()
            .mockImplementation(() => { 
                throw new Error('Enabling user account Testing Error Message.') 
            });

        // ...
        // Test content...
        // ...

        // Restoring the function...
        orm.controllers.enableUserAccount.mockRestore();
        // Error: The property 'mockRestore' doesn't exist for type '(userId: number) => Promise<void>'.

        done();
    });

    // Type error restoring the mock (mocking strategy #2)...
    test('whatever test description.', async (done) => {
        // Creating the spyOn and mocking the function at the same time...
        jest
            .spyOn(orm.controllers, 'enableUserAccount')
            .mockImplementation(() => { 
                throw new Error('Enabling user account Testing Error Message.') 
            });

        // ...
        // Test content...
        // ...

        // Restoring the function...
        orm.controllers.enableUserAccount.mockRestore();
        // Error: The property 'mockRestore' doesn't exist for type '(userId: number) => Promise<void>'.

        done();
    });

    // Without type error restoring the mocked function...
    test('whatever test description.', async (done) => {
        // Creating the spyOn and mocking the function at the same time...
        jest
            .spyOn(orm.controllers, 'enableUserAccount')
            .mockImplementation(() => { 
                throw new Error('Enabling user account Testing Error Message.') 
            });

        // ...
        // Test content...
        // ...

        // Restoring the function...
        jest.spyOn(orm.controllers, 'enableUserAccount').mockRestore();
        // No type error

        done();
    });
)};