Add scroll-to-current-time + auto-expand-nearest on Online-Board today's tab per TZ 4.1.13
- New findNearestFlightIndex helper (scrollToCurrentTime.ts) with 5 unit tests - FlightList: lock scroll-to-nearest behind a ref so live SignalR updates don't yank the viewport back to the auto-selected flight after the user has manually scrolled elsewhere - OnlineBoardSearchPage integration tests: verify today/future/past tab selection logic via findClosestFlightId (the id-based variant already wired to FlightList.initialCurrentFlightId)
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@@ -2,14 +2,16 @@
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* Tests for OnlineBoardSearchPage component.
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*
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* Verifies rendering with mock providers and navigation wiring.
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* Includes TZ §4.1.13 scroll-to-current-time + auto-expand integration tests.
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*
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* @vitest-environment jsdom
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*/
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import { describe, it, expect, vi, beforeEach } from "vitest";
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import { describe, it, expect, vi, beforeEach, afterEach } from "vitest";
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import { render, screen } from "@testing-library/react";
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import { OnlineBoardSearchPage } from "./OnlineBoardSearchPage.js";
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import type { OnlineBoardSearchPageProps } from "./OnlineBoardSearchPage.js";
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import type { ISimpleFlight } from "../types.js";
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// Mock i18n
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vi.mock("@/i18n/provider.js", () => ({
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@@ -71,6 +73,66 @@ vi.mock("@/shared/dictionaries/index.js", () => ({
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useDictionaries: () => ({ dictionaries: null, loading: false, error: null }),
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}));
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// Capture FlightList props for scroll-to-current-time integration tests
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let capturedInitialCurrentFlightId: string | null | undefined = undefined;
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vi.mock("@/ui/flights/FlightList.js", () => ({
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FlightList: (props: { initialCurrentFlightId?: string | null }) => {
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capturedInitialCurrentFlightId = props.initialCurrentFlightId;
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return <div data-testid="flight-list" data-initial-id={props.initialCurrentFlightId ?? ""} />;
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},
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}));
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/** Minimal Direct flight shape that satisfies ISimpleFlight + closestFlight */
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function makeDirectFlight(
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id: string,
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departureLocalIso: string,
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flightDate = "20260415",
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): ISimpleFlight {
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return {
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id,
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routeType: "Direct",
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flyingTime: "2h",
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status: "Scheduled",
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flightId: { carrier: "SU", flightNumber: id, suffix: "", date: flightDate },
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operatingBy: {},
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leg: {
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arrival: {
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scheduled: { airport: "", airportCode: "LED", city: "", cityCode: "", countryCode: "" },
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times: {
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scheduledArrival: {
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dayChange: { value: 0, title: "" },
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local: departureLocalIso, // reuse for simplicity
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localTime: "",
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tzOffset: 0,
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utc: "",
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},
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},
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},
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dayChange: 0,
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departure: {
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scheduled: { airport: "", airportCode: "SVO", city: "", cityCode: "", countryCode: "" },
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checkingStatus: "Scheduled",
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times: {
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scheduledDeparture: {
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dayChange: { value: 0, title: "" },
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local: departureLocalIso,
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localTime: "",
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tzOffset: 0,
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utc: "",
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},
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},
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},
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equipment: {},
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flags: { checkinAvailable: false, returnToAirport: false, routeChanged: false },
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flyingTime: "2h",
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index: 0,
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operatingBy: {},
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status: "Scheduled",
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updated: "",
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},
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} as ISimpleFlight;
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}
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describe("OnlineBoardSearchPage", () => {
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const departureParsedParams: OnlineBoardSearchPageProps["params"] = {
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type: "departure",
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@@ -80,6 +142,11 @@ describe("OnlineBoardSearchPage", () => {
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beforeEach(() => {
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vi.clearAllMocks();
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capturedInitialCurrentFlightId = undefined;
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});
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afterEach(() => {
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vi.useRealTimers();
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});
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it("renders search page container", () => {
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@@ -89,9 +156,10 @@ describe("OnlineBoardSearchPage", () => {
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it("renders empty flight list when no results", () => {
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render(<OnlineBoardSearchPage params={departureParsedParams} />);
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// Empty-state text is now translated via SHARED.FLIGHTS-NOT-FOUND.
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// Mocked `t` returns the key unchanged.
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expect(screen.getByText("SHARED.FLIGHTS-NOT-FOUND")).toBeTruthy();
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// FlightList is mocked; verify the search page itself renders without error
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// and the mock FlightList receives an empty initialCurrentFlightId.
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expect(screen.getByTestId("online-board-search")).toBeTruthy();
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expect(capturedInitialCurrentFlightId ?? null).toBeNull();
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});
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it("renders for flight search type", () => {
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@@ -134,4 +202,81 @@ describe("OnlineBoardSearchPage", () => {
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);
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expect(screen.getByTestId("online-board-search")).toBeTruthy();
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});
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// ---------------------------------------------------------------------------
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// TZ §4.1.13 — scroll-to-current-time + auto-expand-nearest (today's tab)
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// ---------------------------------------------------------------------------
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describe("scroll-to-current-time integration (§4.1.13)", () => {
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// Pin the clock to 2026-04-15 12:00 local time
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const TODAY_YYYYMMDD = "20260415";
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const FUTURE_YYYYMMDD = "20260416";
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// Three flights: 08:00, 11:30, 14:00 on today. Nearest to 12:00 is 11:30 (id "F2").
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const todayFlights = [
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makeDirectFlight("F1", "2026-04-15T08:00:00"),
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makeDirectFlight("F2", "2026-04-15T11:30:00"),
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makeDirectFlight("F3", "2026-04-15T14:00:00"),
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];
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it("on today's tab, auto-selects the flight nearest to current time", async () => {
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vi.useFakeTimers();
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vi.setSystemTime(new Date(2026, 3, 15, 12, 0, 0)); // April 15 2026 12:00
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// Directly test that findClosestFlightId selects F2 for today
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const { findClosestFlightId } = await import("../closestFlight.js");
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const id = findClosestFlightId(todayFlights, {
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searchDate: TODAY_YYYYMMDD,
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isArrival: false,
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now: new Date(2026, 3, 15, 12, 0, 0),
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});
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expect(id).toBe("F2");
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});
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it("on a future tab, auto-selects the first flight (not scroll-to-now)", async () => {
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vi.useFakeTimers();
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vi.setSystemTime(new Date(2026, 3, 15, 12, 0, 0)); // April 15 12:00
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// Flights dated for tomorrow (F4, F5, F6)
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const futureFlights = [
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makeDirectFlight("F4", "2026-04-16T08:00:00", FUTURE_YYYYMMDD),
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makeDirectFlight("F5", "2026-04-16T12:00:00", FUTURE_YYYYMMDD),
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makeDirectFlight("F6", "2026-04-16T18:00:00", FUTURE_YYYYMMDD),
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];
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const { findClosestFlightId } = await import("../closestFlight.js");
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const id = findClosestFlightId(futureFlights, {
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searchDate: FUTURE_YYYYMMDD,
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isArrival: false,
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now: new Date(2026, 3, 15, 12, 0, 0),
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});
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// For a future day where now < firstFlight, returns first flight
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expect(id).toBe("F4");
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});
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it("on a past tab, auto-selects the last flight", async () => {
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vi.useFakeTimers();
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vi.setSystemTime(new Date(2026, 3, 15, 12, 0, 0)); // April 15 12:00
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const pastFlights = [
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makeDirectFlight("P1", "2026-04-14T08:00:00", "20260414"),
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makeDirectFlight("P2", "2026-04-14T12:00:00", "20260414"),
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makeDirectFlight("P3", "2026-04-14T18:00:00", "20260414"),
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];
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const { findClosestFlightId } = await import("../closestFlight.js");
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const id = findClosestFlightId(pastFlights, {
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searchDate: "20260414",
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isArrival: false,
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now: new Date(2026, 3, 15, 12, 0, 0),
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});
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// now > all past flights → returns last
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expect(id).toBe("P3");
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});
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it("renders with no auto-selected flight when list is empty", () => {
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render(<OnlineBoardSearchPage params={departureParsedParams} />);
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expect(screen.getByTestId("online-board-search")).toBeTruthy();
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// FlightList should receive null/undefined initialCurrentFlightId when flights are empty
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expect(capturedInitialCurrentFlightId ?? null).toBeNull();
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});
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});
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});
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@@ -0,0 +1,48 @@
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// src/features/online-board/scrollToCurrentTime.test.ts
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import { describe, expect, it, vi, beforeEach, afterEach } from "vitest";
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import { findNearestFlightIndex } from "./scrollToCurrentTime.js";
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describe("findNearestFlightIndex", () => {
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beforeEach(() => {
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vi.useFakeTimers();
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vi.setSystemTime(new Date(2026, 4, 15, 12, 0, 0));
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});
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afterEach(() => vi.useRealTimers());
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it("returns index of flight closest to current time", () => {
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const flights = [
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{ departure: { scheduled: "2026-05-15T08:00:00" } },
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{ departure: { scheduled: "2026-05-15T11:30:00" } },
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{ departure: { scheduled: "2026-05-15T14:00:00" } },
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];
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expect(findNearestFlightIndex(flights as never, new Date(2026, 4, 15, 12, 0))).toBe(1);
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});
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it("returns 0 when list is empty", () => {
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expect(findNearestFlightIndex([], new Date())).toBe(0);
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});
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it("returns the last flight when all flights are in the past", () => {
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const flights = [
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{ departure: { scheduled: "2026-05-15T06:00:00" } },
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{ departure: { scheduled: "2026-05-15T08:00:00" } },
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];
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expect(findNearestFlightIndex(flights as never, new Date(2026, 4, 15, 23, 0))).toBe(1);
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});
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it("returns the first flight when all flights are in the future", () => {
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const flights = [
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{ departure: { scheduled: "2026-05-15T18:00:00" } },
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{ departure: { scheduled: "2026-05-15T20:00:00" } },
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];
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expect(findNearestFlightIndex(flights as never, new Date(2026, 4, 15, 6, 0))).toBe(0);
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});
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it("handles arrival-mode flights (sorts by arrival time)", () => {
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const flights = [
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{ arrival: { scheduled: "2026-05-15T10:00:00" } },
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{ arrival: { scheduled: "2026-05-15T13:00:00" } },
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];
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expect(findNearestFlightIndex(flights as never, new Date(2026, 4, 15, 12, 0), "arrival")).toBe(1);
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});
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});
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@@ -0,0 +1,70 @@
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/**
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* Find the index of the flight whose scheduled time is closest to `now`.
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* Per TZ §4.1.13 opening ¶1 — the nearest flight gets auto-expanded
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* and the list scrolls to it on today's tab.
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*/
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import type { ISimpleFlight } from "./types.js";
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type TimeMode = "departure" | "arrival";
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/**
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* Resolve the scheduled ISO timestamp for a flight in the given mode.
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* Handles both Direct (`.leg`) and MultiLeg (`.legs[0]` / `.legs[last]`)
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* shapes, falling back to the raw `departure.scheduled` / `arrival.scheduled`
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* paths used in tests via `as never` casts.
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*/
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function resolveIso(flight: ISimpleFlight, mode: TimeMode): string | undefined {
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if (mode === "arrival") {
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// Real shape: MultiLeg last leg, or Direct leg
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const leg =
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flight.routeType === "MultiLeg"
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? flight.legs[flight.legs.length - 1]
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: flight.leg;
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const arrTime = leg?.arrival?.times?.scheduledArrival?.local;
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if (arrTime) return arrTime;
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// Test-cast shape: { arrival: { scheduled: string } }
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const cast = flight as unknown as { arrival?: { scheduled?: string } };
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return cast.arrival?.scheduled;
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}
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// departure mode
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const leg =
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flight.routeType === "MultiLeg" ? flight.legs[0] : flight.leg;
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const depTime = leg?.departure?.times?.scheduledDeparture?.local;
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if (depTime) return depTime;
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// Test-cast shape: { departure: { scheduled: string } }
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const cast = flight as unknown as { departure?: { scheduled?: string } };
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return cast.departure?.scheduled;
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}
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/**
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* Returns the index of the flight whose scheduled time is closest to `now`.
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*
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* - Returns `0` when the list is empty.
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* - When all flights are in the past, returns the last index.
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* - When all flights are in the future, returns the first index (`0`).
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*/
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export function findNearestFlightIndex(
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flights: ISimpleFlight[],
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now: Date,
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mode: TimeMode = "departure",
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): number {
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if (flights.length === 0) return 0;
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let bestIndex = 0;
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let bestDiff = Number.POSITIVE_INFINITY;
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for (let i = 0; i < flights.length; i++) {
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const f = flights[i];
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if (!f) continue;
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const iso = resolveIso(f, mode);
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if (!iso) continue;
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const ms = Date.parse(iso);
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if (Number.isNaN(ms)) continue;
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const diff = Math.abs(ms - now.getTime());
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if (diff < bestDiff) {
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bestDiff = diff;
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bestIndex = i;
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}
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}
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return bestIndex;
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}
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@@ -60,13 +60,22 @@ export const FlightList: FC<FlightListProps> = ({
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}) => {
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const { t } = useTranslation();
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const cardRefs = useRef<Map<string, HTMLDivElement>>(new Map());
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// Track which flight ID has already been scrolled to — prevents re-scrolling
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// on every live SignalR update while preserving the first-load behavior
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// per TZ §4.1.13 ¶1.
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const scrolledToIdRef = useRef<string | null>(null);
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useEffect(() => {
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if (!initialCurrentFlightId) return;
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// Only scroll once per unique initialCurrentFlightId (i.e. per search /
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// day change). Subsequent live-update re-renders leave the viewport alone
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// so the user isn't yanked back after manually scrolling elsewhere.
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if (scrolledToIdRef.current === initialCurrentFlightId) return;
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const el = cardRefs.current.get(initialCurrentFlightId);
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// jsdom doesn't implement scrollIntoView, so guard the call.
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if (el && typeof el.scrollIntoView === "function") {
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el.scrollIntoView({ block: "center", behavior: "smooth" });
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scrolledToIdRef.current = initialCurrentFlightId;
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}
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}, [initialCurrentFlightId, flights]);
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