accounts-frontend/tests/services/authFlow/LoginState.test.js

import LoginState from 'services/authFlow/LoginState';
import PasswordState from 'services/authFlow/PasswordState';
import ForgotPasswordState from 'services/authFlow/ForgotPasswordState';

import { bootstrap, expectState, expectNavigate, expectRun } from './helpers';

describe('LoginState', () => {
    let state;
    let context;
    let mock;

    beforeEach(() => {
        state = new LoginState();

        const data = bootstrap();
        context = data.context;
        mock = data.mock;
    });

    afterEach(() => {
        mock.verify();
    });

    describe('#enter', () => {
        it('should navigate to /login', () => {
            context.getState.returns({
                user: {isGuest: true}
            });

            expectNavigate(mock, '/login');

            state.enter(context);
        });

        const testTransitionToPassword = (user) => {
            context.getState.returns({
                user: user
            });

            expectState(mock, PasswordState);

            state.enter(context);
        };

        it('should transition to password if has email', () => {
            testTransitionToPassword({email: 'foo'});
        });

        it('should transition to password if has username', () => {
            testTransitionToPassword({username: 'foo'});
        });
    });

    describe('#resolve', () => {
        it('should call login with email or username', () => {
            const payload = {};

            expectRun(
                mock,
                'login',
                sinon.match.same(payload)
            ).returns({then() {}});

            state.resolve(context, payload);
        });

        it('should transition to password state on successfull login (first phase)', () => {
            const promise = Promise.resolve();

            mock.expects('run').returns(promise);
            expectState(mock, PasswordState);

            state.resolve(context);

            return promise;
        });

        it('should NOT transition to password state on fail', () => {
            const promise = Promise.reject();

            mock.expects('run').returns(promise);
            mock.expects('setState').never();

            state.resolve(context);

            return promise.catch(mock.verify.bind(mock));
        });
    });
});