From 81557624744e6234a0c21d1672c12c3317a6ed2a Mon Sep 17 00:00:00 2001
From: Aleksey Biryukov <snake4814@gmail.com>
Date: Tue, 30 Jun 2026 23:14:27 +0500
Subject: [PATCH] YH-2159: add test for hook useQueryFilterParams

---
 .../useQueryFilterParams.test.ts              | 134 ++++++++++++++++++
 1 file changed, 134 insertions(+)
 create mode 100644 src/shared/libs/query/useQueryFilterParams/useQueryFilterParams.test.ts

diff --git a/src/shared/libs/query/useQueryFilterParams/useQueryFilterParams.test.ts b/src/shared/libs/query/useQueryFilterParams/useQueryFilterParams.test.ts
new file mode 100644
index 000000000..e24b6fcee
--- /dev/null
+++ b/src/shared/libs/query/useQueryFilterParams/useQueryFilterParams.test.ts
@@ -0,0 +1,134 @@
+import { renderHook } from '@testing-library/react';
+import { act } from 'react';
+import { useLocation, useNavigate } from 'react-router-dom';
+
+import { useQueryFilterParams } from './useQueryFilterParams';
+
+jest.mock('react-router-dom', () => ({
+	useLocation: jest.fn(),
+	useNavigate: jest.fn(),
+}));
+
+interface Params {
+	page: number;
+	status: string;
+	title?: string | null | undefined;
+	skills?: number[];
+}
+
+const initialParams: Params = { page: 1, status: 'all' };
+const currentParams: Params = { page: 3, status: 'learned', title: 'react' };
+
+let mockNavigate: jest.Mock;
+let mockLocation: { search: string; hash: string };
+
+beforeEach(() => {
+	mockNavigate = jest.fn();
+	mockLocation = { search: '', hash: '' };
+
+	(useNavigate as jest.Mock).mockReturnValue(mockNavigate);
+	(useLocation as jest.Mock).mockReturnValue(mockLocation);
+});
+
+describe('initialization and navigation', () => {
+	it('initialize filters with currentParams', () => {
+		const { result } = renderHook(() => useQueryFilterParams(initialParams, currentParams));
+		expect(result.current.filters).toEqual(currentParams);
+	});
+
+	it('navigate to initialParams when URL has no search params', () => {
+		mockLocation.search = '';
+		mockLocation.hash = '#section';
+
+		renderHook(() => {
+			useQueryFilterParams(initialParams, currentParams);
+		});
+		expect(mockNavigate).toHaveBeenCalledWith('?page=1&status=all#section', { replace: true });
+	});
+
+	it('not navigate when URL already has search params', () => {
+		mockLocation.search = '?page=2&status=-not-learned';
+		renderHook(() => {
+			useQueryFilterParams(initialParams, currentParams);
+			expect(mockNavigate).not.toHaveBeenCalled();
+		});
+	});
+});
+
+describe('onFilterChange', () => {
+	it('update filters with new params', () => {
+		const { result } = renderHook(() => useQueryFilterParams(initialParams, currentParams));
+		act(() => result.current.onFilterChange({ page: 5, status: 'all' }));
+		expect(result.current.filters).toEqual({
+			...currentParams,
+			page: 5,
+			status: 'all',
+		});
+	});
+
+	it('navigate to URL with updated params', () => {
+		mockLocation.search = '?page=2&status=-not-learned';
+		mockLocation.hash = '#section';
+		const { result } = renderHook(() => useQueryFilterParams(initialParams, currentParams));
+		act(() => result.current.onFilterChange({ page: 5, status: 'all' }));
+		expect(mockNavigate).toHaveBeenCalledWith('?page=5&status=all&title=react#section');
+	});
+
+	it('delete param from URL if value is null', () => {
+		mockLocation.search = '?page=2&status=-not-learned&title=react';
+		mockLocation.hash = '#section';
+
+		const { result } = renderHook(() => useQueryFilterParams(initialParams, currentParams));
+		act(() => result.current.onFilterChange({ page: 5, status: 'all', title: null }));
+		expect(mockNavigate).toHaveBeenCalledWith('?page=5&status=all#section');
+	});
+
+	it('delete param from URL if value is undefined', () => {
+		mockLocation.search = '?page=2&status=-not-learned&title=react';
+		mockLocation.hash = '#section';
+
+		const { result } = renderHook(() => useQueryFilterParams(initialParams, currentParams));
+		act(() => result.current.onFilterChange({ page: 5, status: 'all', title: undefined }));
+		expect(mockNavigate).toHaveBeenCalledWith('?page=5&status=all#section');
+	});
+
+	it('handle array values as string', () => {
+		mockLocation.search = '?page=2&status=-not-learned';
+		mockLocation.hash = '#section';
+		const { result } = renderHook(() => useQueryFilterParams(initialParams, currentParams));
+		act(() => {
+			result.current.onFilterChange({ page: 5, status: 'all', skills: [5, 8] });
+		});
+		expect(mockNavigate).toHaveBeenCalledWith(
+			expect.stringMatching(/\?page=5&status=all&title=react&skills=5(,|%2C)8#section/),
+		);
+	});
+});
+
+describe('onResetFilters', () => {
+	it('reset filters to initialParams', () => {
+		const { result } = renderHook(() => useQueryFilterParams(initialParams, currentParams));
+		act(() => {
+			result.current.onFilterChange({ page: 5, status: 'all' });
+		});
+		expect(result.current.filters).toEqual({
+			...currentParams,
+			page: 5,
+			status: 'all',
+		});
+		act(() => {
+			result.current.onResetFilters();
+		});
+		expect(result.current.filters).toEqual(initialParams);
+	});
+
+	it('navigate to initialParams URL', () => {
+		mockLocation.hash = '#section';
+
+		const { result } = renderHook(() => useQueryFilterParams(initialParams, currentParams));
+		act(() => {
+			result.current.onResetFilters();
+		});
+		expect(mockNavigate).toHaveBeenCalledWith('?page=1&status=all#section', { replace: true });
+	});
+});