add some tests for crimes ´add´-button, further tests to be defined

tests/views/TatortList.test.ts

@@ -9,6 +9,21 @@ import { API_ROUTES } from '../../src/routes';
 vi.spyOn(nav, 'invalidateAll').mockResolvedValue();
 global.fetch = vi.fn().mockResolvedValue({ ok: true });
 
+async function clickPlusButton() {
+  // mock animation features of the browser
+
+  window.HTMLElement.prototype.scrollIntoView = vi.fn();
+  window.HTMLElement.prototype.animate = vi.fn(() => ({
+    finished: Promise.resolve(),
+    cancel: vi.fn(),
+  }))
+
+  // button is visible
+  const button = screen.getByRole('button', { name: /add item/i })
+  expect(button).toBeInTheDocument();
+
+  await fireEvent.click(button)
+}
 
 describe('Seite: Vorgangsansicht', () => {
   test.todo('Share Link disabled wenn Liste leer');
@@ -83,3 +98,42 @@ describe('Seite: Vorgangsansicht', () => {
     });
   });
 });
+
+
+describe('Hinzufügen Button', () => {
+  it('Unexpandierter Button', () => {
+    const testData = { ...baseData, vorgangList: [] };
+    const { getByTestId } = render(TatortListPage, { props: { data: testData } });
+
+    const container = getByTestId('expand-container')
+    expect(container).toBeInTheDocument();
+
+    // button is visible
+    const button = within(container).getByRole('button')
+    expect(button).toBeInTheDocument();
+
+    // input fields are not visible
+    let label = screen.queryByText('Modellname');
+    expect(label).not.toBeInTheDocument();
+  });
+
+  it('Expandierter Button nach Klick', async () => {
+
+    const testData = { ...baseData, vorgangList: [] };
+    render(TatortListPage, { props: { data: testData } });
+
+    await clickPlusButton();
+
+    // input fields are visible
+    let label = screen.queryByText('Modellname');
+    expect(label).toBeInTheDocument();
+  });
+
+  it.todo('Check Validation: missing name', async () => {
+    console.log(`test: input field validation`);
+  });
+
+  it.todo('Create Tatort successful', async () => {
+    console.log(`test: tatort upload`);
+  });
+});