sinon.js

        it('load() should load data from the API', (done) => {
            const firstAction = {
                type: 'kao/simple/RECEIVING',
            };
            const secondAction = {
                type: 'kao/simple/RECEIVE',
                data: singleItem,
            };

            mockUrl('/api.json', singleItem);

            let duck = defineRemoteEndpoint(simpleParams);
            let load = duck.actions.load();

            let count = 0;
            let dispatch = sinon.spy(() => {
                if (++count !== 2) {
                    return;
                }

                try {
                    expect(dispatch.firstCall.args).to.eql([firstAction]);
                    expect(dispatch.secondCall.args).to.eql([secondAction]);
                    done();
                }
                catch (e) {
                    done(e);
                }
            });

            load(dispatch);
        });