import 'reflect-metadata';

import * as mock from './../../../mocks/index';
const initMockDocument = mock.document(jest);

import {
    DisableScrollingService,
} from './disable-scrolling.service';

const initDisableScrollingService = (
    document?: Document,
) => {
    return new DisableScrollingService(
        document,
    );
};

describe('enableScrolling', () => {
    const overflowValue = '';
    // tslint:disable-next-line
    test('It sets document.html overflow to an empty string', () => {
        const html = {
            style: {
                overflowY: undefined,
            },
        };
        const document = initMockDocument([html]);
        const disableScrollingService = initDisableScrollingService(
            document,
        );

        disableScrollingService.enableScrolling();

        expect(html.style.overflowY).toBe(overflowValue);
    });

    // tslint:disable-next-line
    test('It sets document.body overflow to an empty string', () => {
        const document = initMockDocument();
        const disableScrollingService = initDisableScrollingService(
            document,
        );

        disableScrollingService.enableScrolling();

        expect(document.body.style.overflowY).toBe(overflowValue);
    });
});

describe('disableScrolling', () => {
    const overflowValue = 'hidden';
    // tslint:disable-next-line
    test('It sets document.html overflow to hidden', () => {
        const html = {
            style: {
                overflowY: undefined,
            },
        };
        const document = initMockDocument([html]);
        const disableScrollingService = initDisableScrollingService(
            document,
        );

        disableScrollingService.disableScrolling();

        expect(html.style.overflowY).toBe(overflowValue);
    });

    // tslint:disable-next-line
    test('It sets document.body overflow to an empty string', () => {
        const document = initMockDocument();
        const disableScrollingService = initDisableScrollingService(
            document,
        );

        disableScrollingService.disableScrolling();

        expect(document.body.style.overflowY).toBe(overflowValue);
    });
});