test(UnifiedFontStore): add pagination navigation tests

src/entities/Font/model/store/unifiedFontStore/unifiedFontStore.test.ts

@@ -210,3 +210,73 @@ describe('pagination state', () => {
         expect(store.pagination.totalPages).toBe(3);
     });
 });
+
+describe('pagination navigation', () => {
+    let store: UnifiedFontStore;
+
+    beforeEach(async () => {
+        store = new UnifiedFontStore({ limit: 10 });
+        mockedFetch.mockResolvedValue(makeResponse(generateMockFonts(10), { total: 30, limit: 10, offset: 0 }));
+        await store.refetch();
+    });
+
+    afterEach(() => {
+        store.destroy();
+        queryClient.clear();
+        vi.resetAllMocks();
+    });
+
+    it('nextPage() advances offset by limit when hasMore', () => {
+        store.nextPage();
+
+        expect(store.params.offset).toBe(10);
+    });
+
+    it('nextPage() does nothing when hasMore is false', async () => {
+        mockedFetch.mockResolvedValue(makeResponse(generateMockFonts(10), { total: 20, limit: 10, offset: 10 }));
+        store.setParams({ offset: 10 });
+        await store.refetch();
+
+        store.nextPage();
+
+        expect(store.params.offset).toBe(10);
+    });
+
+    it('prevPage() decrements offset by limit when on page > 1', () => {
+        store.setParams({ offset: 10 });
+
+        store.prevPage();
+
+        expect(store.params.offset).toBe(0);
+    });
+
+    it('prevPage() does nothing on the first page', () => {
+        store.prevPage();
+
+        expect(store.params.offset).toBe(0);
+    });
+
+    it('goToPage() sets the correct offset', () => {
+        store.goToPage(2);
+
+        expect(store.params.offset).toBe(10);
+    });
+
+    it('goToPage() does nothing for page 0', () => {
+        store.goToPage(0);
+
+        expect(store.params.offset).toBe(0);
+    });
+
+    it('goToPage() does nothing for page beyond totalPages', () => {
+        store.goToPage(99);
+
+        expect(store.params.offset).toBe(0);
+    });
+
+    it('setLimit() updates the limit param', () => {
+        store.setLimit(25);
+
+        expect(store.params.limit).toBe(25);
+    });
+});