diff --git a/tests/ably/ably-user-rest-publishing.test.ts b/tests/ably/ably-user-rest-publishing.test.ts
new file mode 100644
index 0000000..1ae3d50
--- /dev/null
+++ b/tests/ably/ably-user-rest-publishing.test.ts
@@ -0,0 +1,167 @@
+import { setup, tearDown } from './setup/sandbox';
+import Echo from '../../src/echo';
+import { MockAuthServer } from './setup/mock-auth-server';
+import { AblyChannel, AblyPrivateChannel } from '../../src/channel';
+import * as Ably from 'ably';
+import waitForExpect from 'wait-for-expect';
+import { toText } from '../../src/channel/ably/utils';
+
+jest.setTimeout(30000);
+describe('AblyUserRestPublishing', () => {
+    let testApp: any;
+    let mockAuthServer: MockAuthServer;
+    let echoInstanes: Array<Echo>;
+
+    beforeAll(async () => {
+        global.Ably = Ably;
+        testApp = await setup();
+        mockAuthServer = new MockAuthServer(testApp.keys[0].keyStr);
+    });
+
+    afterAll(async () => {
+        return await tearDown(testApp);
+    });
+
+    beforeEach(() => {
+        echoInstanes = [];
+    })
+
+    afterEach((done) => {
+        let promises: Array<Promise<Boolean>>= []
+        for (const echo of echoInstanes) {
+            echo.disconnect();
+            const promise = new Promise<Boolean>(res => {
+                echo.connector.ably.connection.once('closed', () => {
+                    res(true);
+                });
+            })
+            promises.push(promise);
+        }
+        Promise.all(promises).then(_=> {
+            done();
+        })
+    });
+
+    async function getGuestUserChannel(channelName: string){
+        mockAuthServer.clientId = null;
+        const guestUser = new Echo({
+            broadcaster: 'ably',
+            useTls: true,
+            environment: 'sandbox',
+            requestTokenFn: mockAuthServer.getSignedToken
+        });
+        echoInstanes.push(guestUser);
+        const publicChannel = guestUser.channel(channelName) as AblyChannel;
+        await new Promise((resolve) => publicChannel.subscribed(resolve));
+        expect(guestUser.connector.ably.auth.clientId).toBeFalsy();
+        expect(guestUser.connector.ablyAuth.existingToken().clientId).toBeNull();
+        return publicChannel;
+    }
+
+    async function getLoggedInUserChannel(channelName: string){
+        mockAuthServer.clientId = 'sacOO7@github.com';
+        const loggedInUser = new Echo({
+            broadcaster: 'ably',
+            useTls: true,
+            environment: 'sandbox',
+            requestTokenFn: mockAuthServer.getSignedToken
+        });
+        echoInstanes.push(loggedInUser);
+        const privateChannel = loggedInUser.private(channelName) as AblyPrivateChannel;
+        await new Promise((resolve) => privateChannel.subscribed(resolve));
+        expect(loggedInUser.connector.ably.auth.clientId).toBe("sacOO7@github.com");
+        expect(loggedInUser.connector.ablyAuth.existingToken().clientId).toBe("sacOO7@github.com")
+        mockAuthServer.clientId = null;
+        return privateChannel;
+    }
+
+    test('Guest user return socketId as base64 encoded connectionkey and null clientId', async() => {
+        await getGuestUserChannel("dummyChannel");
+        const guestUser = echoInstanes[0];
+        const socketIdObj = JSON.parse(toText(guestUser.socketId()));
+
+        const expectedConnectionKey = guestUser.connector.ably.connection.key;
+        
+        expect(socketIdObj.connectionKey).toBe(expectedConnectionKey);
+        expect(socketIdObj.connectionKey).toBeTruthy();
+
+        expect(socketIdObj.clientId).toBeNull();
+    });
+
+    test('Guest user publishes message via rest API', async () => {
+        let messagesReceived: Array<string> = []
+        let channelName = "testChannel";
+
+        const publicChannel1 = await getGuestUserChannel(channelName);
+        publicChannel1.listenToAll((eventName, data) => {
+            messagesReceived.push(eventName);
+        });
+
+        const publicChannel2 = await getGuestUserChannel(channelName);
+        publicChannel2.listenToAll((eventName, data) => {
+            messagesReceived.push(eventName);
+        })
+
+        // Publish message to all clients
+        await mockAuthServer.broadcast(`public:${channelName}`, "testEvent", "mydata")
+        await waitForExpect(() => {
+            expect(messagesReceived.length).toBe(2);
+            expect(messagesReceived.filter(m => m == ".testEvent").length).toBe(2)
+        });
+
+        // Publish message to other client
+        messagesReceived = []
+        const firstClientSocketId = echoInstanes[0].socketId();
+        await mockAuthServer.broadcastToOthers(firstClientSocketId, 
+            {channelName: `public:${channelName}`, eventName: "toOthers", payload: "data"})
+        await waitForExpect(() => {
+            expect(messagesReceived.length).toBe(1);
+            expect(messagesReceived.filter(m => m == ".toOthers").length).toBe(1);
+        });
+    });
+
+    test('Logged in user return socketId as base64 encoded connectionkey and clientId', async() => {
+        await getLoggedInUserChannel("dummyChannel");
+        const loggedInUser = echoInstanes[0];
+        const socketIdObj = JSON.parse(toText(loggedInUser.socketId()));
+
+        const expectedConnectionKey = loggedInUser.connector.ably.connection.key;
+        
+        expect(socketIdObj.connectionKey).toBe(expectedConnectionKey);
+        expect(socketIdObj.connectionKey).toBeTruthy();
+
+        expect(socketIdObj.clientId).toBe("sacOO7@github.com");
+    });
+
+    test('Logged in user publishes message via rest API', async () => {
+        let messagesReceived: Array<string> = []
+        let channelName = "testChannel";
+
+        const privateChannel1 = await getLoggedInUserChannel(channelName);
+        privateChannel1.listenToAll((eventName, data) => {
+            messagesReceived.push(eventName);
+        });
+
+        const privateChannel2 = await getLoggedInUserChannel(channelName);
+        privateChannel2.listenToAll((eventName, data) => {
+            messagesReceived.push(eventName);
+        })
+
+        // Publish message to all clients
+        await mockAuthServer.broadcast(`private:${channelName}`, "testEvent", "mydata")
+        await waitForExpect(() => {
+            expect(messagesReceived.length).toBe(2);
+            expect(messagesReceived.filter(m => m == ".testEvent").length).toBe(2);
+        });
+
+        // Publish message to other client
+        messagesReceived = []
+        const firstClientSocketId = echoInstanes[0].socketId();
+        await mockAuthServer.broadcastToOthers(firstClientSocketId, 
+            {channelName: `private:${channelName}`, eventName: "toOthers", payload: "data"});
+        await waitForExpect(() => {
+            expect(messagesReceived.length).toBe(1);
+            expect(messagesReceived.filter(m => m == ".toOthers").length).toBe(1);
+        });
+    });
+});