import 'reflect-metadata';

import {
    AddIOSVersionClassService,
} from './add-ios-version-class.service';

import {
    SemverInterface,
} from './../../../models/index';

const initAddIOSVersionClassService = (
    document?: Document,
    currentIOSVersion?: SemverInterface,
) => {
    return new AddIOSVersionClassService(
        document,
        currentIOSVersion,
    );
};

describe('addIOSVersionClass', () => {
    const initAddIOSVersionClassData = ({
        currentIOSVersion,
    } = {
        currentIOSVersion: {
            major: 10,
        } as SemverInterface,
    }) => {
        const document = {
            body: {
                classList: {},
            },
        } as Document;
        document.body.classList.add = jest.fn();
        const addIOSVersionClassService = initAddIOSVersionClassService(
            document,
            currentIOSVersion,
        );

        return {
            addIOSVersionClassService,
            document,
        };
    };
    // tslint:disable-next-line
    test('If there is a current ios version, add the major version to the document body', () => {
        const {
            addIOSVersionClassService,
            document,
        } = initAddIOSVersionClassData();

        addIOSVersionClassService.addIOSVersionClass();

        expect(document.body.classList.add).toHaveBeenCalledWith('u-ios-10');
    });

    // tslint:disable-next-line
    test('Does not add a class to the document body if htere is no current ios version', () => {
        const {
            addIOSVersionClassService,
            document,
        } = initAddIOSVersionClassData({
            currentIOSVersion: null,
        });

        addIOSVersionClassService.addIOSVersionClass();

        expect(document.body.classList.add).not.toHaveBeenCalled();
    });
});