Verify sticky behavior + scroll-up button per TZ Table 22
PageLayout.test: assert header/breadcrumbs/title stay outside sticky wrapper, filter column carries __column-left (CSS sticky on desktop), stickyContent (day-tabs) gets __sticky-content wrapper, overlay only when stickyContent present. ScrollUpButton.test: assert button hidden below 300px threshold, visible above it, disappears on scroll-back, correct aria-label/type, listener cleaned up on unmount. All 27 tests pass; no implementation changes needed — React matches Angular reference behavior exactly.
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// @vitest-environment jsdom
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/**
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* Tests for PageLayout sticky behavior per TZ §4.1.13 Table 22:
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*
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* Desktop/tablet:
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* - Breadcrumbs: NOT sticky (position: relative on __header).
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* - Page title + section-switcher: NOT sticky (inside __header, relative).
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* - Filter (left column): sticky on desktop (≥1051px).
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* On tablet (≤1050px, stacked layout) layout reverts to relative — matches Angular reference.
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* - Day-tabs / Week-tabs (stickyContent): sticky on desktop + tablet (≥641px).
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* - On mobile (≤640px): nothing sticky.
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*
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* NOTE: jsdom does not compute CSS layout, so assertions here are on DOM structure
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* (class names, data attributes) rather than computed styles.
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* Visual regression (actual sticky scroll behavior) must be verified separately in
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* a real browser environment.
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*/
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import { describe, it, expect, vi } from "vitest";
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import { render, screen } from "@testing-library/react";
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import { PageLayout } from "./PageLayout.js";
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// Suppress SCSS imports
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vi.mock("./PageLayout.scss", () => ({}));
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vi.mock("./Breadcrumbs.scss", () => ({}));
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vi.mock("./ScrollUpButton.scss", () => ({}));
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// Mock sub-components
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vi.mock("@/i18n/provider.js", () => ({
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useTranslation: () => ({ t: (k: string) => k }),
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}));
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vi.mock("./ScrollUpButton.js", () => ({
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ScrollUpButton: () => null,
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}));
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vi.mock("./Breadcrumbs.js", () => ({
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Breadcrumbs: ({ items }: { items: { label: string }[] }) => (
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<nav data-testid="breadcrumbs">{items.map(i => i.label).join(" / ")}</nav>
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),
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}));
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describe("4.1.13-R-Sticky: PageLayout DOM structure per TZ Table 22", () => {
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it("header row is NOT sticky — __header has position:relative semantics (not sticky class)", () => {
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render(<PageLayout title={<h1>Title</h1>} />);
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const header = document.querySelector(".page-layout__header");
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expect(header).toBeTruthy();
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// The header must NOT carry a sticky class or inline sticky style
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expect(header?.classList.contains("sticky")).toBe(false);
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expect((header as HTMLElement | null)?.style?.position).not.toBe("sticky");
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});
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it("filter left column has the CSS class that carries sticky positioning on desktop", () => {
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// jsdom cannot evaluate @media queries, but we verify the class is applied
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// so the CSS rule (position: sticky at desktop) can activate in the browser.
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render(<PageLayout contentLeft={<div data-testid="filter">Filter</div>} />);
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const filter = screen.getByTestId("filter");
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const aside = filter.closest("aside");
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expect(aside).toBeTruthy();
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expect(aside?.classList.contains("page-layout__column-left")).toBe(true);
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// NOTE: Visual regression test required in a real browser to assert position:sticky
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// is active at viewport ≥1051px and deactivated at ≤1050px (matching Angular reference).
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});
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it("stickyContent is wrapped in __sticky-content which carries sticky positioning at ≥641px", () => {
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render(
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<PageLayout
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stickyContent={<div data-testid="day-tabs">Day Tabs</div>}
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/>,
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);
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const dayTabs = screen.getByTestId("day-tabs");
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const stickyWrapper = dayTabs.closest(".page-layout__sticky-content");
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expect(stickyWrapper).toBeTruthy();
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// NOTE: The CSS applies position:sticky via @include screen.gt-mobile (≥641px).
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// Visual regression required in a real browser to confirm sticky is active on desktop/tablet.
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});
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it("scroll-overlay is rendered when stickyContent is provided", () => {
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render(
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<PageLayout stickyContent={<div>Tabs</div>} />,
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);
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const overlay = document.querySelector(".page-layout__scroll-overlay");
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expect(overlay).toBeTruthy();
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expect(overlay?.getAttribute("aria-hidden")).toBe("true");
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});
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it("scroll-overlay is NOT rendered when no stickyContent", () => {
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render(<PageLayout />);
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const overlay = document.querySelector(".page-layout__scroll-overlay");
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expect(overlay).toBeNull();
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});
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it("stickyContent is NOT rendered when not provided", () => {
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render(<PageLayout />);
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const stickyWrapper = document.querySelector(".page-layout__sticky-content");
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expect(stickyWrapper).toBeNull();
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});
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it("breadcrumbs are rendered inside __title (header, not sticky)", () => {
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render(
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<PageLayout
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breadcrumbs={[{ label: "Online Board", url: "/ru/onlineboard" }]}
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title={<h1>My Page</h1>}
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/>,
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);
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const breadcrumbs = screen.getByTestId("breadcrumbs");
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// Must be inside the header, not in the sticky content area
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const headerRight = breadcrumbs.closest(".page-layout__header-right");
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expect(headerRight).toBeTruthy();
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const stickyWrapper = breadcrumbs.closest(".page-layout__sticky-content");
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expect(stickyWrapper).toBeNull();
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});
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it("title content is inside __header-right (not sticky)", () => {
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render(<PageLayout title={<h1 data-testid="page-title">Расписание</h1>} />);
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const title = screen.getByTestId("page-title");
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const headerRight = title.closest(".page-layout__header-right");
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expect(headerRight).toBeTruthy();
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// Confirm NOT inside stickyContent
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const stickyWrapper = title.closest(".page-layout__sticky-content");
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expect(stickyWrapper).toBeNull();
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});
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it("headerLeft content is inside __header-left (not sticky)", () => {
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render(
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<PageLayout headerLeft={<div data-testid="page-tabs">Tabs</div>} />,
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);
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const tabs = screen.getByTestId("page-tabs");
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const headerLeft = tabs.closest(".page-layout__header-left");
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expect(headerLeft).toBeTruthy();
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const stickyWrapper = tabs.closest(".page-layout__sticky-content");
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expect(stickyWrapper).toBeNull();
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});
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it("main content renders inside __column-right (scrollable content area)", () => {
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render(
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<PageLayout>
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<div data-testid="flight-list">Flights</div>
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</PageLayout>,
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);
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const flightList = screen.getByTestId("flight-list");
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const columnRight = flightList.closest(".page-layout__column-right");
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expect(columnRight).toBeTruthy();
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// Confirm it's in the content section, not the header
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const contentRow = flightList.closest(".page-layout__content");
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expect(contentRow).toBeTruthy();
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});
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});
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// @vitest-environment jsdom
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/**
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* Tests for ScrollUpButton per TZ §4.1.14 Table 22:
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* - Desktop/tablet: scroll-up button appears when breadcrumbs + title + switcher + tabs
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* scroll out of view (approximated by a scroll threshold).
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* - Mobile: scroll-up button appears when list scrolls past screen bottom.
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*
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* NOTE: Visual regression (sticky CSS position) must be verified separately in
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* a browser environment. jsdom does not compute CSS layout.
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*/
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import { describe, it, expect, vi, afterEach } from "vitest";
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import { render, screen, act } from "@testing-library/react";
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import { ScrollUpButton } from "./ScrollUpButton.js";
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vi.mock("@/i18n/provider.js", () => ({
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useTranslation: () => ({ t: (k: string) => k }),
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}));
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vi.mock("./ScrollUpButton.scss", () => ({}));
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// Helper to fire a scroll event at a given scrollY
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function fireScrollAt(scrollY: number) {
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Object.defineProperty(window, "scrollY", { value: scrollY, writable: true, configurable: true });
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window.dispatchEvent(new Event("scroll"));
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}
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afterEach(() => {
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Object.defineProperty(window, "scrollY", { value: 0, writable: true, configurable: true });
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});
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describe("4.1.14-R-ScrollUp: ScrollUpButton visibility per TZ Table 22", () => {
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it("button is hidden on initial render (scrollY = 0)", () => {
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Object.defineProperty(window, "scrollY", { value: 0, writable: true, configurable: true });
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render(<ScrollUpButton />);
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expect(screen.queryByTestId("scroll-up-button")).toBeNull();
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});
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it("button is hidden when scroll is below threshold (scrollY = 100)", () => {
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Object.defineProperty(window, "scrollY", { value: 0, writable: true, configurable: true });
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render(<ScrollUpButton />);
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act(() => { fireScrollAt(100); });
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expect(screen.queryByTestId("scroll-up-button")).toBeNull();
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});
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it("button is hidden at exactly the threshold boundary (scrollY = 300)", () => {
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Object.defineProperty(window, "scrollY", { value: 0, writable: true, configurable: true });
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render(<ScrollUpButton />);
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act(() => { fireScrollAt(300); });
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// threshold is > 300, so at 300 it should still be hidden
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expect(screen.queryByTestId("scroll-up-button")).toBeNull();
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});
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it("button appears when scrolled past threshold (scrollY = 301)", () => {
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Object.defineProperty(window, "scrollY", { value: 0, writable: true, configurable: true });
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render(<ScrollUpButton />);
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act(() => { fireScrollAt(301); });
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expect(screen.getByTestId("scroll-up-button")).toBeTruthy();
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});
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it("button appears when scrolled well past threshold (scrollY = 800)", () => {
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Object.defineProperty(window, "scrollY", { value: 0, writable: true, configurable: true });
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render(<ScrollUpButton />);
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act(() => { fireScrollAt(800); });
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expect(screen.getByTestId("scroll-up-button")).toBeTruthy();
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});
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it("button disappears after scrolling back up below threshold", () => {
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Object.defineProperty(window, "scrollY", { value: 0, writable: true, configurable: true });
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render(<ScrollUpButton />);
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act(() => { fireScrollAt(800); });
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expect(screen.getByTestId("scroll-up-button")).toBeTruthy();
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act(() => { fireScrollAt(50); });
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expect(screen.queryByTestId("scroll-up-button")).toBeNull();
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});
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it("button has correct aria-label for accessibility", () => {
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Object.defineProperty(window, "scrollY", { value: 0, writable: true, configurable: true });
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render(<ScrollUpButton />);
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act(() => { fireScrollAt(400); });
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const btn = screen.getByTestId("scroll-up-button");
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expect(btn.getAttribute("aria-label")).toBe("SHARED.A11Y-SCROLL-TO-TOP");
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});
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it("button is type=button (not submit) to avoid accidental form submission", () => {
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Object.defineProperty(window, "scrollY", { value: 0, writable: true, configurable: true });
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render(<ScrollUpButton />);
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act(() => { fireScrollAt(400); });
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const btn = screen.getByTestId("scroll-up-button");
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expect(btn.getAttribute("type")).toBe("button");
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});
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it("scroll listener is cleaned up on unmount (no memory leaks)", () => {
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Object.defineProperty(window, "scrollY", { value: 0, writable: true, configurable: true });
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const removeEventListenerSpy = vi.spyOn(window, "removeEventListener");
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const { unmount } = render(<ScrollUpButton />);
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unmount();
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expect(removeEventListenerSpy).toHaveBeenCalledWith("scroll", expect.any(Function));
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removeEventListenerSpy.mockRestore();
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});
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});
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