siftlode/frontend/src/components/ui/IconButton.dom.test.tsx

// @vitest-environment jsdom
//
// E28 S3b: the glyph-only button (DESIGN.md A2) and the two other click primitives that sit beside
// `Button`: `Pressable` (a surface whose content is the control) and `DragHandle`.
import { afterEach, describe, expect, it, vi } from "vitest";
import { cleanup, fireEvent, render, screen } from "@testing-library/react";
import { IconButton } from "./IconButton";
import { Pressable } from "./Pressable";
import { DragHandle } from "./DragHandle";

afterEach(cleanup);

describe("IconButton", () => {
  it("is named and tooltipped by its label, and sizes to the A2 rungs", () => {
    const { rerender } = render(
      <IconButton label="Delete">
        <svg data-testid="ic" />
      </IconButton>,
    );
    const btn = screen.getByRole("button", { name: "Delete" });
    expect(btn.getAttribute("title")).toBe("Delete");
    expect(btn.getAttribute("type")).toBe("button");
    expect(btn.className).toContain("size-7");
    expect(btn.className).toContain("touch-target");
    expect(btn.querySelector("[data-testid=ic]")).not.toBeNull();
    rerender(
      <IconButton label="Delete" size="md" noTitle>
        <svg />
      </IconButton>,
    );
    expect(btn.className).toContain("size-8");
    expect(btn.hasAttribute("title")).toBe(false);
  });

  it("is round only on media (A2)", () => {
    for (const variant of ["ghost", "outline", "danger", "glass", "overlay"] as const) {
      const { unmount } = render(
        <IconButton label="X" variant={variant}>
          <svg />
        </IconButton>,
      );
      expect(screen.getByRole("button", { name: "X" }).className).toContain("rounded-lg");
      unmount();
    }
    render(
      <IconButton label="Play" variant="media">
        <svg />
      </IconButton>,
    );
    expect(screen.getByRole("button", { name: "Play" }).className).toContain("rounded-full");
  });

  it("a toggle announces aria-pressed", () => {
    render(
      <IconButton label="Saved" pressed>
        <svg />
      </IconButton>,
    );
    expect(screen.getByRole("button", { name: "Saved" }).getAttribute("aria-pressed")).toBe("true");
  });

  it("loading swaps the glyph for a spinner and swallows the click", () => {
    const onClick = vi.fn();
    render(
      <IconButton label="Sync" loading onClick={onClick}>
        <svg data-testid="ic" />
      </IconButton>,
    );
    const btn = screen.getByRole("button", { name: "Sync" });
    expect(btn.getAttribute("aria-busy")).toBe("true");
    expect(btn.querySelector("[data-testid=ic]")).toBeNull();
    fireEvent.click(btn);
    expect(onClick).not.toHaveBeenCalled();
  });

  it("keeps a caller's aria-disabled: unavailable, focusable, and still saying why", () => {
    // The "an account is behind this address, delete the user instead" state: the reason lives in
    // the label, so the control must stay in the tab order. FocusSafeButton used to overwrite it.
    render(
      <IconButton label="Delete the user instead" aria-disabled onClick={(e) => e.preventDefault()}>
        <svg />
      </IconButton>,
    );
    const btn = screen.getByRole("button", { name: "Delete the user instead" });
    expect(btn.getAttribute("aria-disabled")).toBe("true");
    expect(btn.hasAttribute("disabled")).toBe(false);
  });

  it("cannot be rendered without a name (type level)", () => {
    render(
      <>
        {/* @ts-expect-error a glyph-only button with no label has no accessible name */}
        <IconButton>
          <svg />
        </IconButton>
        <IconButton label="named">
          <svg />
        </IconButton>
        {/* @ts-expect-error a toggle states itself through `pressed`, which also tints it (B3) */}
        <IconButton label="raw toggle" aria-pressed>
          <svg />
        </IconButton>
      </>,
    );
    expect(screen.getByRole("button", { name: "named" })).toBeTruthy();
  });
});

describe("Pressable", () => {
  it("never submits a form, reads left-aligned, and paints a layer only on request", () => {
    const onSubmit = vi.fn((e: { preventDefault: () => void }) => e.preventDefault());
    const { rerender } = render(
      <form onSubmit={onSubmit}>
        <Pressable>Row</Pressable>
      </form>,
    );
    const row = screen.getByRole("button", { name: "Row" });
    fireEvent.click(row);
    expect(onSubmit).not.toHaveBeenCalled();
    expect(row.className).toContain("text-left");
    expect(row.className).not.toContain("state-layer");
    rerender(
      <form onSubmit={onSubmit}>
        <Pressable layer>Row</Pressable>
      </form>,
    );
    expect(row.className).toContain("state-layer");
  });
});

describe("DragHandle", () => {
  it("names the row it moves, and when unavailable stays focusable with its reason", () => {
    const onClick = vi.fn();
    render(<DragHandle label="Move Intro" unavailable onClick={onClick} />);
    const h = screen.getByRole("button", { name: "Move Intro" });
    expect(h.hasAttribute("disabled")).toBe(false);
    expect(h.getAttribute("aria-disabled")).toBe("true");
    expect(h.getAttribute("title")).toBe("Move Intro");
    fireEvent.click(h);
    expect(onClick).not.toHaveBeenCalled();
  });

  it("takes a finger's drag instead of scrolling the page (touch-action: none, WCAG 2.5.7)", () => {
    render(<DragHandle label="Move Intro" />);
    expect(screen.getByRole("button", { name: "Move Intro" }).className).toContain("touch-none");
  });
});