From bba984bd898e1ff40673be92b976812cb5d56ce9 Mon Sep 17 00:00:00 2001
From: wmoooid <threeqletters@yandex.ru>
Date: Sun, 2 Jun 2024 15:13:19 +0400
Subject: [PATCH] [test]: useIsFirstRender

---
 .../useIsFirstRender/useIsFirstRender.test.ts | 35 +++++++++++++++++++
 1 file changed, 35 insertions(+)
 create mode 100644 src/hooks/useIsFirstRender/useIsFirstRender.test.ts

diff --git a/src/hooks/useIsFirstRender/useIsFirstRender.test.ts b/src/hooks/useIsFirstRender/useIsFirstRender.test.ts
new file mode 100644
index 0000000..0817dc2
--- /dev/null
+++ b/src/hooks/useIsFirstRender/useIsFirstRender.test.ts
@@ -0,0 +1,35 @@
+import { renderHook } from '@testing-library/react';
+
+import { useIsFirstRender } from './useIsFirstRender';
+
+it('Should return true on the first render', () => {
+  const { result } = renderHook(useIsFirstRender);
+
+  expect(result.current).toBe(true);
+});
+
+it('Should return false on subsequent renders', () => {
+  const { result, rerender } = renderHook(useIsFirstRender);
+
+  expect(result.current).toBe(true);
+
+  rerender();
+  expect(result.current).toBe(false);
+
+  rerender();
+  expect(result.current).toBe(false);
+});
+
+it('Should maintain state across multiple components', () => {
+  const { result: result1, rerender: rerender1 } = renderHook(useIsFirstRender);
+  const { result: result2, rerender: rerender2 } = renderHook(useIsFirstRender);
+
+  expect(result1.current).toBe(true);
+  expect(result2.current).toBe(true);
+
+  rerender1();
+  expect(result1.current).toBe(false);
+
+  rerender2();
+  expect(result2.current).toBe(false);
+});