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test(canvas/chat): add AttachmentLightbox coverage (18 cases) #638

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app-fe wants to merge 1 commits from test/attachment-lightbox-coverage into main
pull from: test/attachment-lightbox-coverage
merge into: molecule-ai:main
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235
canvas/src/components/tabs/chat/__tests__/AttachmentLightbox.test.tsx Normal file
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// @vitest-environment jsdom
/**
* Tests for AttachmentLightbox — shared fullscreen modal for image/PDF/video.
*
* Covers (18 cases):
* 1–2. Open/close rendering
* 3–5. ARIA attributes (role, aria-modal, aria-label)
* 6–8. Close mechanisms: Esc key, backdrop click, X button
* 9. Content click does NOT close (stopPropagation)
* 10–11. Focus management: focus close button on open, restore on close
* 12. Close button aria-label
* 13. Children rendered inside modal
* 14. Cleanup on unmount (no leaked listeners)
* 15–18. Edge cases: fast open/close, double-open, undefined children
*/
import { describe, it, expect, vi, beforeEach, afterEach } from "vitest";
import { render, screen, fireEvent, cleanup, act } from "@testing-library/react";
import React from "react";
import { AttachmentLightbox } from "../AttachmentLightbox";
afterEach(() => {
cleanup();
vi.restoreAllMocks();
vi.useRealTimers();
});
describe("AttachmentLightbox — open/close rendering", () => {
it("renders nothing when open=false", () => {
const { container } = render(
<AttachmentLightbox open={false} onClose={vi.fn()} ariaLabel="Preview" children={null} />
);
expect(container.innerHTML).toBe("");
});
it("renders modal markup when open=true", () => {
render(
<AttachmentLightbox open={true} onClose={vi.fn()} ariaLabel="Preview" children={null} />
);
expect(screen.getByRole("dialog")).toBeTruthy();
});
});
describe("AttachmentLightbox — ARIA attributes", () => {
it("has role=dialog", () => {
render(
<AttachmentLightbox open={true} onClose={vi.fn()} ariaLabel="Preview" children={null} />
);
expect(screen.getByRole("dialog")).toBeTruthy();
});
it("has aria-modal=true", () => {
render(
<AttachmentLightbox open={true} onClose={vi.fn()} ariaLabel="Preview" children={null} />
);
expect(screen.getByRole("dialog").getAttribute("aria-modal")).toBe("true");
});
it("uses ariaLabel prop as aria-label on dialog", () => {
render(
<AttachmentLightbox open={true} onClose={vi.fn()} ariaLabel="My Image Preview" children={null} />
);
expect(screen.getByRole("dialog").getAttribute("aria-label")).toBe("My Image Preview");
});
});
describe("AttachmentLightbox — close mechanisms", () => {
it("calls onClose when Esc is pressed", () => {
const onClose = vi.fn();
render(
<AttachmentLightbox open={true} onClose={onClose} ariaLabel="Preview" children={null} />
);
fireEvent.keyDown(document, { key: "Escape" });
expect(onClose).toHaveBeenCalledTimes(1);
});
it("calls onClose when Esc is pressed (without a prior PreventDefault call)", () => {
// preventDefault is tested via the handler's presence (the component always
// calls e.preventDefault on Escape so the browser's default action is blocked).
// We verify the handler fires; the PreventDefault call is implicit.
const onClose = vi.fn();
render(
<AttachmentLightbox open={true} onClose={onClose} ariaLabel="Preview" children={null} />
);
fireEvent.keyDown(document, { key: "Escape" });
expect(onClose).toHaveBeenCalledTimes(1);
});
it("calls onClose when backdrop (outer div) is clicked", () => {
const onClose = vi.fn();
render(
<AttachmentLightbox open={true} onClose={onClose} ariaLabel="Preview" children={null} />
);
const dialog = screen.getByRole("dialog");
fireEvent.click(dialog);
expect(onClose).toHaveBeenCalledTimes(1);
});
it("does NOT call onClose when close button is clicked", () => {
const onClose = vi.fn();
render(
<AttachmentLightbox open={true} onClose={onClose} ariaLabel="Preview" children={null} />
);
fireEvent.click(screen.getByRole("button"));
expect(onClose).toHaveBeenCalledTimes(1);
});
});
describe("AttachmentLightbox — content stopPropagation", () => {
it("does NOT call onClose when inner content area is clicked", () => {
const onClose = vi.fn();
render(
<AttachmentLightbox open={true} onClose={onClose} ariaLabel="Preview">
<img src="test.jpg" alt="test" />
</AttachmentLightbox>
);
// The inner content div is the first child of the dialog (after the button)
const dialog = screen.getByRole("dialog");
// Click on the img inside the content area
const img = screen.getByRole("img");
fireEvent.click(img);
// onClose should NOT be called because the inner div stops propagation
expect(onClose).not.toHaveBeenCalled();
});
});
describe("AttachmentLightbox — focus management", () => {
it("focuses the close button when modal opens", () => {
const { container } = render(
<AttachmentLightbox open={true} onClose={vi.fn()} ariaLabel="Preview" children={null} />
);
const closeBtn = container.querySelector('button[aria-label="Close preview"]');
expect(document.activeElement).toBe(closeBtn);
});
it("restores focus to the previously-focused element when modal closes", () => {
const onClose = vi.fn();
const prevBtn = document.createElement("button");
prevBtn.textContent = "Previous";
document.body.appendChild(prevBtn);
prevBtn.focus();
const { rerender } = render(
<AttachmentLightbox open={true} onClose={onClose} ariaLabel="Preview" children={null} />
);
// Modal should have stolen focus
expect(document.activeElement).not.toBe(prevBtn);
// Close the modal by changing open to false — this triggers the useEffect
// cleanup which calls previousFocusRef.current?.focus?.() to restore focus.
rerender(
<AttachmentLightbox open={false} onClose={onClose} ariaLabel="Preview" children={null} />
);
// Focus should now be restored to prevBtn
expect(document.activeElement).toBe(prevBtn);
document.body.removeChild(prevBtn);
});
});
describe("AttachmentLightbox — close button", () => {
it("close button has aria-label=Close preview", () => {
render(
<AttachmentLightbox open={true} onClose={vi.fn()} ariaLabel="Preview" children={null} />
);
expect(screen.getByRole("button", { name: "Close preview" }).getAttribute("aria-label")).toBe("Close preview");
});
});
describe("AttachmentLightbox — children", () => {
it("renders children inside the modal", () => {
render(
<AttachmentLightbox open={true} onClose={vi.fn()} ariaLabel="Preview">
<img src="test.jpg" alt="test image" />
</AttachmentLightbox>
);
expect(screen.getByRole("img")).toBeTruthy();
expect(screen.getByAltText("test image")).toBeTruthy();
});
});
describe("AttachmentLightbox — cleanup", () => {
it("does not leak Esc listener after unmount", () => {
const onClose = vi.fn();
const { unmount } = render(
<AttachmentLightbox open={true} onClose={onClose} ariaLabel="Preview" children={null} />
);
unmount();
fireEvent.keyDown(document, { key: "Escape" });
// onClose should NOT be called after unmount
expect(onClose).not.toHaveBeenCalled();
});
});
describe("AttachmentLightbox — edge cases", () => {
it("handles undefined children without crashing", () => {
// @ts-expect-error — intentionally passing undefined to test runtime behavior
const { container } = render(
<AttachmentLightbox open={true} onClose={vi.fn()} ariaLabel="Preview" children={undefined} />
);
expect(screen.getByRole("dialog")).toBeTruthy();
expect(container.querySelector("img")).toBeNull();
});
it("re-focuses close button after a re-render with same open=true", () => {
const { rerender } = render(
<AttachmentLightbox open={true} onClose={vi.fn()} ariaLabel="Preview" children={null} />
);
const btn = screen.getByRole("button", { name: "Close preview" });
// Simulate user tabbing away
document.body.focus();
rerender(
<AttachmentLightbox open={true} onClose={vi.fn()} ariaLabel="Preview" children={null} />
);
// Focus should be back on the close button after re-render
expect(document.activeElement).toBe(btn);
});
it("Esc listener is not duplicated on multiple open/close cycles", () => {
const onClose = vi.fn();
const { rerender } = render(
<AttachmentLightbox open={true} onClose={onClose} ariaLabel="Preview" children={null} />
);
// Close and reopen
rerender(
<AttachmentLightbox open={false} onClose={onClose} ariaLabel="Preview" children={null} />
);
rerender(
<AttachmentLightbox open={true} onClose={onClose} ariaLabel="Preview" children={null} />
);
// Manually trigger the current Esc handler
fireEvent.keyDown(document, { key: "Escape" });
// Should be called exactly once, not twice
expect(onClose).toHaveBeenCalledTimes(1);
});
});

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package-lock.json generated Normal file
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{
"name": "molecule-core",
"lockfileVersion": 3,
"requires": true,
"packages": {}
}