element-web-Github/test/components/structures/FilePanel-test.tsx

/*
Copyright 2024 New Vector Ltd.
Copyright 2024 The Matrix.org Foundation C.I.C.

SPDX-License-Identifier: AGPL-3.0-only OR GPL-3.0-only
Please see LICENSE files in the repository root for full details.
*/

import React from "react";
import { EventTimelineSet, PendingEventOrdering, Room } from "matrix-js-sdk/src/matrix";
import { screen, render, waitFor } from "@testing-library/react";
import { mocked } from "jest-mock";

import FilePanel from "../../../src/components/structures/FilePanel";
import ResizeNotifier from "../../../src/utils/ResizeNotifier";
import { stubClient } from "../../test-utils";
import { MatrixClientPeg } from "../../../src/MatrixClientPeg";

jest.mock("matrix-js-sdk/src/matrix", () => ({
    ...jest.requireActual("matrix-js-sdk/src/matrix"),
    TimelineWindow: jest.fn().mockReturnValue({
        load: jest.fn().mockResolvedValue(null),
        getEvents: jest.fn().mockReturnValue([]),
        canPaginate: jest.fn().mockReturnValue(false),
    }),
}));

describe("FilePanel", () => {
    beforeEach(() => {
        stubClient();
    });

    it("renders empty state", async () => {
        const cli = MatrixClientPeg.safeGet();
        const room = new Room("!room:server", cli, cli.getSafeUserId(), {
            pendingEventOrdering: PendingEventOrdering.Detached,
        });
        const timelineSet = new EventTimelineSet(room);
        room.getOrCreateFilteredTimelineSet = jest.fn().mockReturnValue(timelineSet);
        mocked(cli.getRoom).mockReturnValue(room);

        const { asFragment } = render(
            <FilePanel roomId={room.roomId} onClose={jest.fn()} resizeNotifier={new ResizeNotifier()} />,
        );
        await waitFor(() => {
            expect(screen.getByText("No files visible in this room")).toBeInTheDocument();
        });
        expect(asFragment()).toMatchSnapshot();
    });
});