tests

import React from 'react';
import { createMockStore } from 'redux-test-utils';
import { shallowWithStore } from 'enzyme-redux';
import { mount, shallow, configure } from 'enzyme';
import Adapter from 'enzyme-adapter-react-16';
import TravellersScreen from './index';
import Counter from '../../../../components/Counter';

configure({ adapter: new Adapter() });

const testState = {
    activeTrip: {
        travellers: [{dateOfBirth: ''}],
        roamInsurance: {
            totalPrice: 2
        }
    },
    user: {
        config: {
            accountRn: '123123',
            apiAccessToken: 'qwe',
            identityToken: 'asd'
        }
    }
};

const store = createMockStore(testState);

describe('<TravellersScreen />', () => {
    let wrapper;
    let wrapperDived;
    let inst;

    beforeAll(() => {
        wrapper = shallowWithStore(<TravellersScreen />, store);
        wrapperDived = wrapper.dive();
        inst = wrapperDived.instance();
    });

    it('<TravellersScreen /> component contains <Counter />', () => {
        expect(wrapperDived.find('Counter').exists()).toBeTruthy();
    });

    it('<TravellersScreen /> component could add traveller', () => {
        inst.addTravellers('');  
        expect(wrapperDived.state().travellers).toHaveLength(2);
    });

    it('<TravellersScreen /> component could remove traveller', () => {
        inst.removeTraveller(1);  
        expect(wrapperDived.state().travellers).toHaveLength(1);
    });

    it("<TravellersScreen /> component couldn't remove if single traveller exists", () => {
        inst.removeTraveller(0);
        expect(wrapperDived.state().travellers).toHaveLength(1);
    });

    it("<TravellersScreen /> can't contain more then 8 travellers", () => {
        const initialTravellers = new Array(7).fill({dateOfBirth: ''}, 0, 7);
        initialTravellers.forEach(t => inst.addTravellers(t.dateOfBirth));
        expect(wrapperDived.state().travellers).toHaveLength(8);
        const counterInstance = wrapperDived.find('Counter').dive().instance();
        counterInstance.onIncrement();
        counterInstance.setState({ count: 8 }, () => {
            counterInstance.onIncrement();
            expect(wrapperDived.state().travellers).toHaveLength(8);
        }); 
    });
});