update invalid protocal error message

Author: emilykl

src/components/modebar/buttons.js

@@ -91,8 +91,9 @@ modeBarButtons.sendChartToCloud = {
             console.error('Invalid plotlyServerURL: ' + baseUrl);
             return;
         }
-        if (baseUrlObj.protocol !== 'https:' && baseUrlObj.protocol !== 'http:') {
-            console.error('Invalid protocol for plotlyServerURL: ' + baseUrl);
+        const supportedProtocols = ['http:', 'https:'];
+        if (!supportedProtocols.includes(baseUrlObj.protocol)) {
+            console.error(`Invalid protocol '${baseUrlObj.protocol}' in plotlyServerURL '${baseUrl}'. Must be one of: ${supportedProtocols.join(', ')}`);
             return;
         }
 

test/jasmine/tests/config_test.js

@@ -569,7 +569,7 @@ describe('config argument', function() {
             .then(function() {
                 modeBarButtons.sendChartToCloud.click(gd);
                 expect(document.querySelector('.plotly-cloud-dialog')).toBe(null, 'confirmation dialog should not be shown');
-                expect(errorSpy).toHaveBeenCalledWith('Invalid protocol for plotlyServerURL: ftp://example.plotly.com');
+                expect(errorSpy).toHaveBeenCalledWith("Invalid protocol 'ftp:' in plotlyServerURL 'ftp://example.plotly.com'. Must be one of: http:, https:");
             })
             .then(done, done.fail);
         });