Streaming events with redux-saga

We’ll repeat a lot of the same techniques in this section. There are two new concepts: first, pulling out the search param for the watcher ID, and second, using eventChannel to subscribe to the onmessage callback. This is used to continually stream messages from the WebSocket into the Redux store.

Let’s being by specifying the new URL behavior:

1. Write a new describe block at the bottom of test/middleware/sharingSagas.test.js, but still nested inside the main describe block:

   describe("watching", () => {
     beforeEach(() => {
       Object.defineProperty(window, "location", {
         writable: true,
         value: {
           host: "test:1234",
           pathname: "/index.html",
           search...