Jest .toHaveBeenCalled() not recording function calls - jestjs

Question

I'm testing a service in my NestJs application which calls a factory to receive an object with a method up(), which I'm mocking like this:
export const mockExecutorFactory = {
getExecutor: jest.fn().mockImplementation(() => {
return {
up: jest.fn().mockImplementation((_updatedInstance, _parameters) => {
console.log('****************************');
return Promise.resolve({ successful: true });
}),
};
}),
};
In my describe block for the service test I initialize the executor like this:
let executor;
beforeEach(async () => {
const module: TestingModule = await Test.createTestingModule({
providers: [
InstanceService,
{ provide: getRepositoryToken(Instance), useValue: mockInstanceRepository },
ExecutorFactory,
],
})
.overrideProvider(ExecutorFactory)
.useValue(mockExecutorFactory)
.compile();
service = module.get<InstanceService>(InstanceService);
executor = module.get<ExecutorFactory>(ExecutorFactory).getExecutor();
});
And the test its self is written like this:
it('should create a new instance with default settings', async () => {
// Check if instance created correctly
expect(
await service.createInstance(
MOCK_INSTANCE_CREATE_PARAMS.solutionId,
MOCK_INSTANCE_CREATE_PARAMS.instanceType,
MOCK_INSTANCE_CREATE_PARAMS.orgId,
MOCK_INSTANCE_CREATE_PARAMS.parameters,
MOCK_INSTANCE_CREATE_PARAMS.customPrice,
true,
MOCK_INSTANCE_CREATE_PARAMS.req,
),
).toEqual({ instance: MOCK_INSTANCE_DEFAULT });
console.log(executor);
expect(executor.up).toHaveBeenCalled();
});
Essentially, the createInstance() runs through some logic and at the end is supposed to call the executor's up() function.
From the terminal output (photo below) I can see by the console logs that the the up() is being called, but the test fails... Any idea why?