add mock recommender service for development, add user-context recommended posts

test/functional/posts_controller_test.rb

@@ -120,15 +120,12 @@ class PostsControllerTest < ActionDispatch::IntegrationTest
         setup do
           @post2 = create(:post)
           RecommenderService.stubs(:enabled?).returns(true)
-          RecommenderService.stubs(:available?).returns(true)
-          RecommenderService.stubs(:similar).returns([[@post.id, "1.0"], [@post2.id, "0.01"]])
+          RecommenderService.stubs(:available_for_post?).returns(true)
         end
 
-        should "render a section for similar posts" do
+        should "not error out" do
           get_auth post_path(@post), @user
           assert_response :success
-          assert_select ".similar-posts"
-          assert_select ".similar-posts #post_#{@post2.id}"
         end
       end
     end

test/functional/recommended_posts_controller_test.rb

@@ -0,0 +1,41 @@
+require "test_helper"
+
+class RecommendedPostsControllerTest < ActionDispatch::IntegrationTest
+  context "The recommended posts controller" do
+    setup do
+      @user = travel_to(1.month.ago) {create(:user)}
+      as_user do
+        @post = create(:post, :tag_string => "aaaa")
+      end
+      RecommenderService.stubs(:enabled?).returns(true)
+    end
+
+    context "post context" do
+      setup do
+        RecommenderService.stubs(:available_for_post?).returns(true)
+        RecommenderService.stubs(:recommend_for_post).returns([@post])
+      end
+
+      should "render" do
+        get_auth recommended_posts_path, @user, xhr: true, params: {context: "post", post_id: @post.id}
+        assert_response :success
+        assert_select ".recommended-posts"
+        assert_select ".recommended-posts #post_#{@post.id}"
+      end
+    end
+
+    context "user context" do
+      setup do
+        RecommenderService.stubs(:available_for_user?).returns(true)
+        RecommenderService.stubs(:recommend_for_user).returns([@post])
+      end
+      
+      should "render" do
+        get_auth recommended_posts_path, @user, params: {context: "user"}
+        assert_response :success
+        assert_select ".recommended-posts"
+        assert_select ".recommended-posts #post_#{@post.id}"
+      end
+    end
+  end
+end