Merge pull request #138 from Ceylar37/test-useDidUpdate

test: add tests for useDidUpdate

src/hooks/useDidUpdate/useDidUpdate.test.ts

@@ -0,0 +1,41 @@
+import { renderHook } from '@testing-library/react';
+
+import { useDidUpdate } from './useDidUpdate';
+
+it('Should use did update', () => {
+  const effect = vi.fn();
+  renderHook(() => useDidUpdate(effect, []));
+
+  expect(effect).not.toHaveBeenCalled();
+});
+
+it('Should call effect on subsequent updates when dependencies change', () => {
+  const effect = vi.fn();
+  const { rerender } = renderHook(({ deps }) => useDidUpdate(effect, deps), {
+    initialProps: { deps: [1] }
+  });
+
+  expect(effect).not.toHaveBeenCalled();
+
+  rerender({ deps: [1] });
+  expect(effect).not.toHaveBeenCalled();
+
+  rerender({ deps: [2] });
+  expect(effect).toHaveBeenCalledTimes(1);
+
+  rerender({ deps: [3] });
+  expect(effect).toHaveBeenCalledTimes(2);
+});
+
+it('Should call effect on subsequent updates when dependencies change', () => {
+  const effect = vi.fn();
+  const { rerender } = renderHook(() => useDidUpdate(effect));
+
+  expect(effect).not.toHaveBeenCalled();
+
+  rerender();
+  expect(effect).toHaveBeenCalledTimes(1);
+
+  rerender();
+  expect(effect).toHaveBeenCalledTimes(2);
+});