test(RealTimeAPI): Added basic tests.

Setup for mocking websockets with mock-socket package. Added tests for websocket connection and
keepAlive().

#25

__tests__/RealTimeAPI.test.ts

@@ -0,0 +1,47 @@
+import { WebSocket, Server } from "mock-socket";
+import { RealTimeAPI } from "../src/index";
+
+describe("RealTimeAPI tests", () => {
+  const url = "ws://localhost:8080/";
+  let mockServer;
+
+  beforeEach(() => {
+    mockServer = new Server(url);
+  });
+
+  afterEach(() => {
+    let closer = {
+      code: 0,
+      reason: "disconnected",
+      wasClean: true
+    };
+    mockServer.close(closer);
+  });
+
+  it("can connect", done => {
+    const realtimeAPI$ = new RealTimeAPI(url); // Connecting to websocket url.
+
+    realtimeAPI$.subscribe();
+
+    mockServer.on("connection", (socket: WebSocket) => {
+      expect(socket.url).toEqual(url); // Expecting websocket url.
+      done();
+    });
+  });
+
+  it("can send pong for every ping", done => {
+    const realtimeAPI$ = new RealTimeAPI(url);
+
+    realtimeAPI$.keepAlive().subscribe(); // Should send pong to every ping message.
+
+    mockServer.on("connection", (socket: WebSocket) => {
+      expect(socket.url).toEqual(url); // Expecting websocket url.
+
+      socket.send(JSON.stringify({ msg: "ping" })); // Sending "ping" message.
+      socket.on("message", data => {
+        expect(data).toEqual(JSON.stringify({ msg: "pong" })); // Expecting to receive "pong" message.
+        done();
+      });
+    });
+  });
+});

__tests__/rx-sql.test.ts

@@ -1,6 +0,0 @@
-import { Server, WebSocket } from "mock-socket";
-import { RealTimeAPI } from "../src/RealTimeAPI";
-
-describe("RxSQL Tests", () => {
-  it("Mock Test", () => {});
-});