Missing error messages when `initialValue` is undefined in the last result object

[ham3dz]

Describe the bug and the expected behavior

I was mocking the result of a form submission in a test but couldn’t get the expected render. After debugging, I realized that adding an empty object for initialValue in the mocked object fixes the issue. Note that the initialValue in SubmissionResult is optional.

Here’s the mock I created for the React Router/Remix component:

    const Stub = createRoutesStub([
      {
        path: '/',
        Component: ComponentUnderTheTest,
        action(): SubmissionResult<string[]> {
          return {
            status: 'error',

            // it works with an empty object, but if I comment this line it will cause the test to fail
            initialValue: {},

            error: {
              name: ['some error'],
            },
            fields: ['name'],
          };
        },
      },
    ]);

   expect(screen.getByRole('textbox', {
        description: 'some error',
      })).toBeInTheDocument();

Conform version

v1.8.2

Steps to Reproduce the Bug or Issue

Use the following snippet in a React component:

  const lastResult = useMemo(() => {
    return {
      status: 'error',

      // uncoment this line for expected behavior 
      // initialValue: {},
      error: {
        name: ['some error message'],
      },
      fields: ['name'],
    }
  }, []);

  const [form, fields] = useForm({
    lastResult,
  });

  console.log('Error message', fields.name.errors);

It’s expected to print some error message in the logs, but it doesn’t.

What browsers are you seeing the problem on?

Chrome

Screenshots or Videos

No response

Additional context

No response