refine comment mailer functional tests (#9321)

* refine comment mailer functional tests

* Update comment_controller_test.rb

* adjust order in test "search question at /search/questions/question" do test

* Update search_controller_test.rb

test/functional/comment_controller_test.rb

@@ -290,7 +290,11 @@ def teardown
 
   test 'should send mail to moderator if comment has status 4' do
     UserSession.create(users(:moderator))
-    post :create, params: { id: nodes(:one).nid, body: 'example', status: 4 }, xhr: true
+    perform_enqueued_jobs do 
+      assert_changes 'ActionMailer::Base.deliveries.size' do
+        post :create, params: { id: nodes(:one).nid, body: 'example', status: 4 }, xhr: true
+      end
+    end
     assert ActionMailer::Base.deliveries.collect(&:to).include?([users(:moderator).email])
   end
 
@@ -304,22 +308,34 @@ def teardown
 
   test 'should send mail to tag followers in the comment' do
     UserSession.create(users(:jeff))
-    post :create, params: { id: nodes(:question).nid, body: 'Question #awesome', type: 'question' }, xhr: true
+    perform_enqueued_jobs do 
+      assert_changes 'ActionMailer::Base.deliveries.size' do
+        post :create, params: { id: nodes(:question).nid, body: 'Question #awesome', type: 'question' }, xhr: true
+      end
+    end
     assert ActionMailer::Base.deliveries.collect(&:to).include?([users(:bob).email])
     # tag followers can be found in tag_selection.yml
   end
 
   test 'should send mail to multiple tag followers in the comment' do
     UserSession.create(users(:jeff))
-    post :create, params: { id: nodes(:question).nid, body: 'Question #everything #awesome', type: 'question' }, xhr: true
+    perform_enqueued_jobs do 
+      assert_changes 'ActionMailer::Base.deliveries.size' do
+        post :create, params: { id: nodes(:question).nid, body: 'Question #everything #awesome', type: 'question' }, xhr: true
+      end
+    end
     assert ActionMailer::Base.deliveries.collect(&:to).include?([users(:bob).email])
     assert ActionMailer::Base.deliveries.collect(&:to).include?([users(:moderator).email])
     # tag followers can be found in tag_selection.yml
   end
 
   test 'should send notification email upon a new wiki comment' do
     UserSession.create(users(:jeff))
-    post :create, params: { id: nodes(:wiki_page).nid, body: 'A comment by Jeff on a wiki page of author bob', type: 'page' }, xhr: true
+    perform_enqueued_jobs do 
+      assert_difference 'ActionMailer::Base.deliveries.size', 1 do
+        post :create, params: { id: nodes(:wiki_page).nid, body: 'A comment by Jeff on a wiki page of author bob', type: 'page' }, xhr: true
+      end
+    end
     assert ActionMailer::Base.deliveries.collect(&:subject).include?("New comment on Wiki page title (#11) - #c#{Comment.last.id}")
   end
 
@@ -368,11 +384,14 @@ def teardown
 
   test 'should not send notification email to author if notify-comment-direct:false usertag is present' do
     UserSession.create(users(:jeff))
-    post :create, params: {
-        id: nodes(:activity).nid,
-        body: 'A comment by Jeff on note of author test_user'
-    }, xhr: true
-
+    perform_enqueued_jobs do 
+      assert_difference 'ActionMailer::Base.deliveries.size', 0 do
+        post :create, params: {
+          id: nodes(:activity).nid,
+          body: 'A comment by Jeff on note of author test_user'
+        }, xhr: true
+      end
+    end
     assert_not ActionMailer::Base.deliveries.collect(&:subject).include?("New comment on #{nodes(:activity).title} (##{nodes(:activity).nid}) ")
     assert_not ActionMailer::Base.deliveries.collect(&:to).include?([users(:test_user).email])
   end

test/functional/search_controller_test.rb

@@ -48,7 +48,7 @@ class SearchControllerTest < ActionController::TestCase
   test "search question at /search/questions/question" do
     get :questions, params: { query: 'question' }
     assert_response :success
-    assert_equal nodes(:question).nid, assigns(:questions).first.nid
+    assert assigns(:questions).include?(nodes(:question))
   end
 
   test "search places page at /search/places/map" do