Add contenteditable change event test

front/src/components/table/__tests__/EditableCell.test.tsx

@@ -0,0 +1,17 @@
+import { render } from '@testing-library/react';
+import userEvent from '@testing-library/user-event';
+
+import { RegularEditableCell } from '../__stories__/EditableCell.stories';
+
+it('Checks the EditableCell editing event bubbles up', async () => {
+  const func = jest.fn(() => null);
+  const { getByTestId } = render(<RegularEditableCell changeHandler={func} />);
+
+  const parent = getByTestId('content-editable-parent');
+  expect(parent).not.toBeNull();
+  const editable = parent.querySelector('[contenteditable]');
+  expect(editable).not.toBeNull();
+  editable && userEvent.click(editable);
+  userEvent.keyboard('a');
+  expect(func).toBeCalled();
+});