FEATURE: pasting a link into the title of the composer can automatically onebox it and update the title

test/javascripts/acceptance/composer-topic-links-test.js.es6

@@ -0,0 +1,42 @@
+import { acceptance } from "helpers/qunit-helpers";
+
+acceptance("Composer topic featured links", {
+  loggedIn: true,
+  settings: {
+    topic_featured_link_enabled: true
+  }
+});
+
+
+test("onebox with title", () => {
+  visit("/");
+  click('#create-topic');
+  fillIn('#reply-title', "http://www.example.com/has-title.html");
+  andThen(() => {
+    ok(find('.d-editor-preview').html().trim().indexOf('onebox') > 0, "it pastes the link into the body and previews it");
+    ok(exists('.d-editor-textarea-wrapper .popup-tip.good'), 'the body is now good');
+    equal(find('.title-input input').val(), "An interesting article", "title is from the oneboxed article");
+  });
+});
+
+test("onebox result doesn't include a title", () => {
+  visit("/");
+  click('#create-topic');
+  fillIn('#reply-title', 'http://www.example.com/no-title.html');
+  andThen(() => {
+    ok(find('.d-editor-preview').html().trim().indexOf('onebox') > 0, "it pastes the link into the body and previews it");
+    ok(exists('.d-editor-textarea-wrapper .popup-tip.good'), 'the body is now good');
+    equal(find('.title-input input').val(), "no-title.html", "title is from the end of the url");
+  });
+});
+
+test("no onebox result", () => {
+  visit("/");
+  click('#create-topic');
+  fillIn('#reply-title', "http://www.example.com/nope-onebox.html");
+  andThen(() => {
+    equal(find('.d-editor-preview').html().trim().indexOf('onebox'), -1, "link isn't put into the post");
+    equal(find('.d-editor-input').val().length, 0, "link isn't put into the post");
+    equal(find('.title-input input').val(), "http://www.example.com/nope-onebox.html", "title is unchanged");
+  });
+});

test/javascripts/helpers/create-pretender.js.es6

@@ -320,6 +320,26 @@ export default function() {
     this.delete('/admin/users/:user_id/revoke_api_key', success);
     this.post('/admin/badges', success);
     this.delete('/admin/badges/:id', success);
+
+    this.get('/onebox', request => {
+      if (request.queryParams.url === 'http://www.example.com/has-title.html') {
+        return [
+          200,
+          {"Content-Type": "application/html"},
+          '<aside class="onebox"><article class="onebox-body"><h3><a href="http://www.example.com/article.html">An interesting article</a></h3></article></aside>'
+        ];
+      }
+
+      if (request.queryParams.url === 'http://www.example.com/no-title.html') {
+        return [
+          200,
+          {"Content-Type": "application/html"},
+          '<aside class="onebox"><article class="onebox-body"><p>No title</p></article></aside>'
+        ];
+      }
+
+      return [404, {"Content-Type": "application/html"}, ''];;
+    });
   });
 
   server.prepareBody = function(body){

test/javascripts/models/composer-test.js.es6

@@ -231,3 +231,19 @@ test("Title length for static page topics as admin", function() {
   composer.set('title', '');
   ok(!composer.get('titleLengthValid'), "admins must set title to at least 1 character");
 });
+
+test("title placeholder depends on what you're doing", function() {
+  let composer = createComposer({action: Composer.CREATE_TOPIC});
+  equal(composer.get('titlePlaceholder'), 'composer.title_placeholder', "placeholder for normal topic");
+
+  composer = createComposer({action: Composer.PRIVATE_MESSAGE});
+  equal(composer.get('titlePlaceholder'), 'composer.title_placeholder', "placeholder for private message");
+
+  Discourse.SiteSettings.topic_featured_link_enabled = true;
+
+  composer = createComposer({action: Composer.CREATE_TOPIC});
+  equal(composer.get('titlePlaceholder'), 'composer.title_or_link_placeholder', "placeholder invites you to paste a link");
+
+  composer = createComposer({action: Composer.PRIVATE_MESSAGE});
+  equal(composer.get('titlePlaceholder'), 'composer.title_placeholder', "placeholder for private message with topic links enabled");
+});