adding playBasedOnTrack method to radio module

src/spotify/radio.js

@@ -14,10 +14,13 @@ const TRACK_NAME = (artist, songName) =>
     `"${songName}" by ${artist}`;
 
 const RECCOMENDED_TRACKS_ENDPOINT = `${API_BASE}/recommendations`;
+const SLACK_SUCCESS_MESSAGE = playlistName =>
+    `Playlist changed to ${playlistName}`;
 
 module.exports = {
 
     PLAYLIST_NAME,
+    SLACK_SUCCESS_MESSAGE,
 
     getRecommendationsFromTrack(trackId, trackInfo, accessToken) {
 
@@ -45,7 +48,6 @@ module.exports = {
 
     createStation(playlistUri, spotifyUri, accessToken) {
 
-
         const trackId = extractFromUri(spotifyUri, 'track');
         let playlistName;
 
@@ -81,5 +83,24 @@ module.exports = {
                 }
                 return Promise.reject(err)
             });
+    },
+
+    playBasedOnTrack(playlistUri, trackUri, accessToken, spotifyLocalUrl) {
+
+        return this
+            .createStation(playlistUri, trackUri, accessToken)
+            .then(() =>
+                request
+                    .post({
+                        uri: `${spotifyLocalUrl}/api/spotify/playlist`,
+                        body: {
+                            playlist: playlistUri
+                        },
+                        json: true
+                    })
+            )
+            .then(resp =>
+                SLACK_SUCCESS_MESSAGE(resp.playlist.title)
+            );
     }
 };

test/spotify/radio/test_playBasedOnTrack.js

@@ -0,0 +1,58 @@
+const { beforeEach, afterEach, describe, it } = require('mocha');
+const { expect, config } = require('chai');
+const request = require('request-promise-native');
+const sinon = require('sinon');
+const radio = require('../../../src/spotify/radio');
+
+
+const context = describe;
+
+config.includeStack = true;
+
+describe('The spotify.radio.playBasedOnTrack method', () => {
+
+    context('with a working spotifyLocal connection', () => {
+
+        const playlistName =  radio.PLAYLIST_NAME(
+            '"Everyone" by Van Morrison'
+        );
+
+        beforeEach(() => {
+            sinon
+                .stub(radio, 'createStation')
+                .resolves({})
+
+            sinon
+                .stub(request, 'post')
+                .resolves({
+                    playlist: {
+                        title: playlistName
+                    }
+                })
+
+        });
+
+        afterEach(() => {
+            radio.createStation.restore();
+            request.post.restore();
+        });
+
+        it('resolves with a message for slack', (done) => {
+
+            const trackUri = 'spotify:track:528kEbmXBOuMbxdn7YQAXx';
+            const spotifyLocalUrl = 'http://localhost:5000';
+            const playlistUri = 'spotify:user:awpoops:playlist:5PP1I2m0uxEBb3VKLhI7bP';
+            const token = 'BQDCP3FOWeE8e9a9lKUeu4JB0o1eN8UQzLvsWiyXgcr9RaPhM3o8L7XLXcopGnzl3vK4w8R_hlzy2-MW6x0PPS14b7CDMw_ctMcLUvWPLYEokMHKd9ENL-_fLwsRVhQFyHphY90hVYYthsizEWy8jdxMT_uptqf2auwAu6zhowkCxSYW9qG6F62_AkLQL5qu1t64DOmp4X8NtEP84ZGGiw11lbvGPl_wf6qS2ADuedQqxVSNoL4';
+
+            radio
+                .playBasedOnTrack(playlistUri, trackUri, token, spotifyLocalUrl)
+                .then((message) => {
+                    expect(message).to.equal(
+                        radio.SLACK_SUCCESS_MESSAGE(playlistName)
+                    )
+                    done();
+                })
+                .catch(done);
+        })
+    });
+});