peter
922d589b09
The rail was a row of aria-pressed toggles: every tab a Tab stop, no arrows, nothing tying a tab to its content. tablist/tab/aria-selected, one Tab stop, arrows on either axis, Home/End, and useTabPanel for aria-controls/labelledby.
65 lines
2.5 KiB
TypeScript
65 lines
2.5 KiB
TypeScript
// @vitest-environment jsdom
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//
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// E28 review F3: the tab rail was a row of `aria-pressed` toggle buttons — every tab a Tab stop, no
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// arrow keys, and nothing tying a tab to the content it shows. It is an ARIA tab list now.
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import { useState } from "react";
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import { afterEach, describe, expect, it } from "vitest";
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import { cleanup, fireEvent, render, screen } from "@testing-library/react";
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import Tabs from "./Tabs";
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import { useTabPanel } from "./tabPanel";
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afterEach(cleanup);
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const TABS = [
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{ id: "a", label: "Alpha" },
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{ id: "b", label: "Beta" },
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{ id: "c", label: "Gamma" },
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];
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function Harness() {
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const [active, setActive] = useState("a");
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const panel = useTabPanel();
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return (
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<>
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<Tabs idBase={panel.idBase} tabs={TABS} active={active} onChange={setActive} label="Pick" />
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<div {...panel.panelProps(active)}>content of {active}</div>
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</>
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);
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}
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const tab = (name: string) => screen.getByRole("tab", { name });
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describe("Tabs", () => {
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it("is a tab list with one Tab stop, the selected tab", () => {
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render(<Harness />);
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expect(screen.getByRole("tablist", { name: "Pick" })).toBeTruthy();
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expect(tab("Alpha").getAttribute("aria-selected")).toBe("true");
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expect(tab("Beta").getAttribute("aria-selected")).toBe("false");
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expect(TABS.map((t) => tab(t.label).tabIndex)).toEqual([0, -1, -1]);
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});
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it("moves and selects with the arrows, and Home/End jump to the ends", () => {
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render(<Harness />);
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tab("Alpha").focus();
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fireEvent.keyDown(document.activeElement!, { key: "ArrowRight" });
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expect(document.activeElement).toBe(tab("Beta"));
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expect(tab("Beta").getAttribute("aria-selected")).toBe("true");
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fireEvent.keyDown(document.activeElement!, { key: "End" });
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expect(document.activeElement).toBe(tab("Gamma"));
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fireEvent.keyDown(document.activeElement!, { key: "ArrowRight" }); // wraps
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expect(document.activeElement).toBe(tab("Alpha"));
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fireEvent.keyDown(document.activeElement!, { key: "ArrowUp" }); // either axis
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expect(document.activeElement).toBe(tab("Gamma"));
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fireEvent.keyDown(document.activeElement!, { key: "Home" });
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expect(tab("Alpha").getAttribute("aria-selected")).toBe("true");
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});
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it("ties each tab to the panel, and the panel to the selected tab", () => {
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render(<Harness />);
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const panel = screen.getByRole("tabpanel");
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expect(tab("Beta").getAttribute("aria-controls")).toBe(panel.id);
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fireEvent.click(tab("Beta"));
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expect(screen.getByRole("tabpanel", { name: "Beta" })).toBe(panel);
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});
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});
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