element-web/test/components/views/elements/PowerSelector-test.tsx

/*
Copyright 2022 The Matrix.org Foundation C.I.C.

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.
*/

import React from "react";
import { fireEvent, render, screen } from "@testing-library/react";
import { defer } from "matrix-js-sdk/src/utils";

import PowerSelector from "../../../../src/components/views/elements/PowerSelector";

describe("<PowerSelector />", () => {
    it("should reset back to custom value when custom input is blurred blank", async () => {
        const fn = jest.fn();
        render(<PowerSelector value={25} maxValue={100} usersDefault={0} onChange={fn} />);

        const input = screen.getByLabelText("Power level");
        fireEvent.change(input, { target: { value: "" } });
        fireEvent.blur(input);

        await screen.findByDisplayValue(25);
        expect(fn).not.toHaveBeenCalled();
    });

    it("should reset back to preset value when custom input is blurred blank", async () => {
        const fn = jest.fn();
        render(<PowerSelector value={50} maxValue={100} usersDefault={0} onChange={fn} />);

        const select = screen.getByLabelText("Power level");
        fireEvent.change(select, { target: { value: "SELECT_VALUE_CUSTOM" } });

        const input = screen.getByLabelText("Power level");
        fireEvent.change(input, { target: { value: "" } });
        fireEvent.blur(input);

        const option = await screen.findByText<HTMLOptionElement>("Moderator");
        expect(option.selected).toBeTruthy();
        expect(fn).not.toHaveBeenCalled();
    });

    it("should call onChange when custom input is blurred with a number in it", async () => {
        const fn = jest.fn();
        render(<PowerSelector value={25} maxValue={100} usersDefault={0} onChange={fn} powerLevelKey="key" />);

        const input = screen.getByLabelText("Power level");
        fireEvent.change(input, { target: { value: 40 } });
        fireEvent.blur(input);

        await screen.findByDisplayValue(40);
        expect(fn).toHaveBeenCalledWith(40, "key");
    });

    it("should reset when props get changed", async () => {
        const fn = jest.fn();
        const { rerender } = render(<PowerSelector value={50} maxValue={100} usersDefault={0} onChange={fn} />);

        const select = screen.getByLabelText("Power level");
        fireEvent.change(select, { target: { value: "SELECT_VALUE_CUSTOM" } });

        rerender(<PowerSelector value={51} maxValue={100} usersDefault={0} onChange={fn} />);
        await screen.findByDisplayValue(51);

        rerender(<PowerSelector value={50} maxValue={100} usersDefault={0} onChange={fn} />);
        const option = await screen.findByText<HTMLOptionElement>("Moderator");
        expect(option.selected).toBeTruthy();
        expect(fn).not.toHaveBeenCalled();
    });

    it("should reset when onChange promise rejects", async () => {
        const deferred = defer<void>();
        render(
            <PowerSelector
                value={25}
                maxValue={100}
                usersDefault={0}
                onChange={() => deferred.promise}
                powerLevelKey="key"
            />,
        );

        const input = screen.getByLabelText("Power level");
        fireEvent.change(input, { target: { value: 40 } });
        fireEvent.blur(input);

        await screen.findByDisplayValue(40);
        deferred.reject("Some error");
        await screen.findByDisplayValue(25);
    });
});