tests: useLogger (#670)

src/__tests__/useLogger.test.ts

@@ -0,0 +1,41 @@
+import { renderHook } from '@testing-library/react-hooks';
+import useLogger from '../useLogger';
+
+const logSpy = jest.spyOn(global.console, 'log').mockImplementation(() => {});
+
+describe('useLogger', () => {
+  it('should be defined', () => {
+    expect(useLogger).toBeDefined();
+  });
+
+  it('should log the provided props on mount', () => {
+    const props = { question: 'What is the meaning?', answer: 42 };
+    renderHook(() => useLogger('Test', props));
+
+    expect(logSpy).toBeCalledTimes(1);
+    expect(logSpy).toHaveBeenLastCalledWith('Test mounted', props);
+  });
+
+  it('should log when the component has unmounted', () => {
+    const props = { question: 'What is the meaning?', answer: 42 };
+    const { unmount } = renderHook(() => useLogger('Test', props));
+
+    unmount();
+
+    expect(logSpy).toHaveBeenLastCalledWith('Test unmounted');
+  });
+
+  it('should log updates as props change', () => {
+    const { rerender } = renderHook(
+      ({ componentName, props }: { componentName: string; props: any }) => useLogger(componentName, props),
+      {
+        initialProps: { componentName: 'Test', props: { one: 1 } },
+      }
+    );
+
+    const newProps = { one: 1, two: 2 };
+    rerender({ componentName: 'Test', props: newProps });
+
+    expect(logSpy).toHaveBeenLastCalledWith('Test updated', newProps);
+  });
+});