Throw exception if no templateName gets provided but allow setting templateName to false explicitly

closes #6877

Changelog.md

@@ -3,6 +3,7 @@
 ## Refactor
 
 * Removed the publisher from a user's photo stream due to various issues [#6851](https://github.com/diaspora/diaspora/pull/6851)
+* Don't implicitly ignore missing templateName in app.views.Base [#6877](https://github.com/diaspora/diaspora/pull/6877)
 
 ## Bug fixes
 

app/assets/javascripts/app/pages/profile.js

 // @license magnet:?xt=urn:btih:0b31508aeb0634b347b8270c7bee4d411b5d4109&dn=agpl-3.0.txt AGPL-v3-or-Later
 
 app.pages.Profile = app.views.Base.extend({
+  templateName: false,
+
   events: {
     'click #block_user_button': 'blockPerson',
     'click #unblock_user_button': 'unblockPerson'

app/assets/javascripts/app/views.js

@@ -38,11 +38,19 @@ app.views.Base = Backbone.View.extend({
   renderTemplate : function(){
     var presenter = _.isFunction(this.presenter) ? this.presenter() : this.presenter;
     this.template = HandlebarsTemplates[this.templateName+"_tpl"];
-    if(!this.template) {
-      console.log(this.templateName ? ("no template for " + this.templateName) : "no templateName specified");
+
+    if (this.templateName === false) {
       return;
     }
 
+    if (!this.templateName) {
+      throw new Error("No templateName set, set to false to ignore.");
+    }
+
+    if (!this.template) {
+      throw new Error("Invalid templateName provided: " + this.templateName);
+    }
+
     this.$el
       .html(this.template(presenter))
       .attr("data-template", _.last(this.templateName.split("/")));

spec/javascripts/app/views_spec.js

@@ -8,6 +8,30 @@ describe("app.views.Base", function(){
       this.view.render();
     });
 
+    it("throws an exception if no templateName was provided", function() {
+      expect(function() {
+        new app.views.Base().render();
+      }).toThrow(new Error("No templateName set, set to false to ignore."));
+    });
+
+    it("does not throw an exception if templateName is set to false", function() {
+      var ViewClass = app.views.Base.extend({
+        templateName: false
+      });
+
+      new ViewClass().render();
+    });
+
+    it("throws an exception if an invalid templateName was provided", function() {
+      expect(function() {
+        var ViewClass = app.views.Base.extend({
+          templateName: "noiamnotavalidtemplate"
+        });
+
+        new ViewClass().render();
+      }).toThrow(new Error("Invalid templateName provided: noiamnotavalidtemplate"));
+    });
+
     it("renders the template with the presenter", function(){
       expect($(this.view.el).text().trim()).toBe("model attributes are in the default presenter");
     });