accounts-frontend/tests/components/ui/bsod/BsodMiddleware.test.js

import expect from 'unexpected';
import sinon from 'sinon';

import BsodMiddleware from 'components/ui/bsod/BsodMiddleware';

describe('BsodMiddleware', () => {
    [404, 500, 503, 555].forEach((code) =>
        it(`should dispatch for ${code}`, () => {
            const resp = {
                originalResponse: {status: code}
            };

            const dispatch = sinon.spy();
            const logger = {warn: sinon.spy()};

            const middleware = new BsodMiddleware(dispatch, logger);

            return expect(middleware.catch(resp), 'to be rejected with', resp)
                .then(() => {
                    expect(dispatch, 'was called');
                    expect(logger.warn, 'to have a call satisfying', [
                        'Unexpected response',
                        {resp}
                    ]);
                });
        })
    );

    it('should not dispatch for 200', () => {
        const resp = {
            originalResponse: {status: 200}
        };

        const dispatch = sinon.spy();
        const logger = {warn: sinon.spy()};

        const middleware = new BsodMiddleware(dispatch, logger);

        return expect(middleware.catch(resp), 'to be rejected with', resp)
            .then(() => {
                expect(dispatch, 'was not called');
                expect(logger.warn, 'was not called');
            });
    });
});