What version of Bun is running?

1.0.3+25e69c71e70ac8a0a88f9cf15b4057bd7b2a633a

What platform is your computer?

Linux 5.15.0-83-generic x86_64 x86_64

What steps can reproduce the bug?

1. Create a file MyModule.ts
2. Export a class MyClass from the module with following structure:

export class MyClass {
    myMethod() {
        return 'Hello';
    }
}

3. Create a file MyModule.test.ts
4. Write a test that tests the myMethod

test('myMethod return value', () => {
    const value = new MyClass().myMethod();
    expect(value).toEqual('Hello');
})

5. Create another file OtherModule.test.ts
6. Mock / spyOn the myMethod.

spyOn(MyClass.prototype, 'myMethod').mockImplementation(() => 'Hola');

7. The myMethod return value test starts failing like this:

error: expect(received).toEqual(expected)

Expected: "Hello"
Received: "Hola"

What is the expected behavior?

The mocks / spyOns should be contained within individual test suites.

What do you see instead?

The mock is being applied across the test suites. All implementations are now mocked. Also, mockRestore doesn't seem to work.

Additional information

No response