correct implementation add tests

lib/topic_query.rb

@@ -201,7 +201,7 @@ class TopicQuery
 
   def latest_results(options={})
     result = default_results(options)
-    result = remove_muted_topics(result, @user) unless options && options[:state] = "muted".freeze
+    result = remove_muted_topics(result, @user) unless options && options[:state] == "muted".freeze
     result = remove_muted_categories(result, @user, exclude: options[:category])
     result
   end

spec/components/topic_query_spec.rb

@@ -374,6 +374,7 @@ describe TopicQuery do
 
         it "returns an empty set" do
           expect(topics).to be_blank
+          expect(topic_query.list_latest.topics).to be_blank
         end
 
         context 'un-muted' do
@@ -383,6 +384,7 @@ describe TopicQuery do
 
           it "returns the topic again" do
             expect(topics).to eq([new_topic])
+            expect(topic_query.list_latest.topics).not_to be_blank
           end
         end
       end