✅ [open-formulieren/open-forms#4929] Update form start tests

Updated the existing tests for the new component structure and
injection of dependencies, and some tests were moved from Form
to FormStart tests because the behaviour being tested was also moved.

Less mocks are now used and the tests should generally be a bit more
robust.

src/components/Form.spec.jsx

@@ -1,4 +1,4 @@
-import {render, screen, waitFor, waitForElementToBeRemoved} from '@testing-library/react';
+import {render, screen} from '@testing-library/react';
 import userEvent from '@testing-library/user-event';
 import messagesEN from 'i18n/compiled/en.json';
 import {IntlProvider} from 'react-intl';
@@ -10,8 +10,6 @@ import mswServer from 'api-mocks/msw-server';
 import {mockSubmissionPost, mockSubmissionStepGet} from 'api-mocks/submissions';
 import {routes} from 'components/App';
 
-import {START_FORM_QUERY_PARAM} from './constants';
-
 window.scrollTo = vi.fn();
 
 beforeEach(() => {
@@ -51,72 +49,6 @@ const Wrapper = ({form = buildForm(), initialEntry = '/startpagina'}) => {
   );
 };
 
-// TODO: move to/merge with FormStart tests
-test('Start form anonymously', async () => {
-  const user = userEvent.setup();
-  mswServer.use(mockSubmissionPost(), mockAnalyticsToolConfigGet(), mockSubmissionStepGet());
-  let startSubmissionRequest;
-  mswServer.events.on('request:match', async ({request}) => {
-    const url = new URL(request.url);
-    if (request.method === 'POST' && url.pathname.endsWith('/api/v2/submissions')) {
-      startSubmissionRequest = request;
-    }
-  });
-  // form with only anonymous login option
-  const form = buildForm({loginOptions: [], loginRequired: false});
-
-  render(<Wrapper form={form} />);
-
-  await waitForElementToBeRemoved(() => screen.getByRole('status'));
-
-  const startButton = screen.getByRole('button', {name: 'Begin'});
-  await user.click(startButton);
-
-  expect(startSubmissionRequest).not.toBeUndefined();
-  const requestBody = await startSubmissionRequest.json();
-  expect(requestBody.anonymous).toBe(true);
-});
-
-// TODO: move to/merge with FormStart tests
-test('Start form as if authenticated from the backend', async () => {
-  mswServer.use(mockAnalyticsToolConfigGet(), mockSubmissionPost(), mockSubmissionStepGet());
-  let startSubmissionRequest;
-  mswServer.events.on('request:match', async ({request}) => {
-    const url = new URL(request.url);
-    if (request.method === 'POST' && url.pathname.endsWith('/api/v2/submissions')) {
-      startSubmissionRequest = request;
-    }
-  });
-  render(<Wrapper initialEntry={`/startpagina?${START_FORM_QUERY_PARAM}=1`} />);
-
-  await waitFor(() => {
-    expect(startSubmissionRequest).not.toBeUndefined();
-  });
-  const requestBody = await startSubmissionRequest.json();
-  expect(requestBody.anonymous).toBe(false);
-});
-
-// TODO: move to/merge with FormStart tests
-test('Start form with object reference query param', async () => {
-  mswServer.use(mockAnalyticsToolConfigGet(), mockSubmissionPost(), mockSubmissionStepGet());
-  let startSubmissionRequest;
-  mswServer.events.on('request:match', async ({request}) => {
-    const url = new URL(request.url);
-    if (request.method === 'POST' && url.pathname.endsWith('/api/v2/submissions')) {
-      startSubmissionRequest = request;
-    }
-  });
-  render(
-    <Wrapper initialEntry={`/startpagina?${START_FORM_QUERY_PARAM}=1&initial_data_reference=foo`} />
-  );
-
-  await waitFor(() => {
-    expect(startSubmissionRequest).not.toBeUndefined();
-  });
-  const requestBody = await startSubmissionRequest.json();
-  expect(requestBody.initialDataReference).toBe('foo');
-});
-
 // Regression test for https://github.com/open-formulieren/open-forms/issues/4918
 test.each([
   {