Fix issue where regular cloud variable messages were throwing uncaught Json...

Fix issue where regular cloud variable messages were throwing uncaught Json parse errors because of a newline being at the end of the message. Add test that fails without the bugfix.

src/lib/cloud-provider.js

@@ -51,8 +51,10 @@ class CloudProvider {
         log.info(`Received websocket message: ${messageString}`);
         // Multiple commands can be received, newline separated
         messageString.split('\n').forEach(message => {
-            const parsedData = this.parseMessage(JSON.parse(message));
-            this.vm.postIOData('cloud', parsedData);
+            if (message) { // .split can also contain '' in the array it returns
+                const parsedData = this.parseMessage(JSON.parse(message));
+                this.vm.postIOData('cloud', parsedData);
+            }
         });
     }
 

test/unit/util/cloud-provider.test.js

@@ -70,6 +70,16 @@ describe('CloudProvider', () => {
         expect(vmIOData[0].varUpdate.value).toEqual('value');
     });
 
+    test('onMessage with newline at the end', () => {
+        const msg1 = JSON.stringify({
+            method: 'set',
+            name: 'name1',
+            value: 'value'
+        });
+        cloudProvider.onMessage({data: `${msg1}\n`});
+        expect(vmIOData[0].varUpdate.name).toEqual('name1');
+    });
+
     test('onMessage with multiple commands', () => {
         const msg1 = JSON.stringify({
             method: 'set',