refactor: simplify errors and focus tests

src/pages/stocks/ui/StocksPage/StocksPage.test.tsx

@@ -1,9 +1,9 @@
 import { MantineProvider } from "@mantine/core";
 import { QueryClientProvider } from "@tanstack/react-query";
-import { fireEvent, render, screen, waitFor } from "@testing-library/react";
+import { act, fireEvent, render, screen, waitFor } from "@testing-library/react";
 import { http, HttpResponse } from "msw";
 import { MemoryRouter } from "react-router";
-import { describe, expect, it, vi } from "vitest";
+import { afterEach, describe, expect, it, vi } from "vitest";
 
 import { configureAuthClient } from "@/shared/api";
 import { createTestQueryClient } from "@/test/query";
@@ -12,6 +12,8 @@ import { server } from "@/test/server";
 
 import { StocksPage } from "./StocksPage";
 
+afterEach(() => vi.useRealTimers());
+
 describe("stock search", () => {
 	it("waits for a meaningful query and uses the server-verified ticker link", async () => {
 		const query = vi.fn();
@@ -44,6 +46,7 @@ describe("stock search", () => {
 			clear: vi.fn(),
 			refresh: () => Promise.resolve(false),
 		});
+		vi.useFakeTimers();
 		render(
 			<QueryClientProvider client={createTestQueryClient()}>
 				<MantineProvider>
@@ -53,10 +56,16 @@ describe("stock search", () => {
 				</MantineProvider>
 			</QueryClientProvider>,
 		);
+		const input = screen.getByLabelText("Поиск акций");
+		fireEvent.change(input, { target: { value: "S" } });
+		await act(() => vi.advanceTimersByTimeAsync(300));
 		expect(query).not.toHaveBeenCalled();
-		fireEvent.change(screen.getByLabelText("Поиск акций"), {
-			target: { value: "SBER" },
-		});
+		fireEvent.change(input, { target: { value: "SB" } });
+		await act(() => vi.advanceTimersByTimeAsync(299));
+		expect(query).not.toHaveBeenCalled();
+		// The final input uses real timers for network and query notifications.
+		vi.useRealTimers();
+		fireEvent.change(input, { target: { value: "SBER" } });
 		expect(
 			await screen.findByRole("link", { name: /Сбербанк/ }),
 		).toHaveAttribute("href", "/stocks/SBER");
@@ -64,6 +73,6 @@ describe("stock search", () => {
 		expect(screen.getByText("Режим: TQBR")).toBeVisible();
 		expect(screen.getByText("ISIN: RU0009029540")).toBeVisible();
 		expect(screen.getByText("Мосбиржа")).toBeVisible();
-		await waitFor(() => expect(query).toHaveBeenCalledWith("SBER"));
+		await waitFor(() => expect(query).toHaveBeenCalledExactlyOnceWith("SBER"));
 	});
 });