Relocate User model spec to Community model spec.

spec/models/community_spec.rb

@@ -7,4 +7,21 @@ RSpec.describe Community, type: :model do
 
     expect(proposal.community).to be_valid
   end
+
+  describe "#participants" do
+
+    it "should return participants without duplicates" do
+      proposal = create(:proposal)
+      community = proposal.community
+      user1 = create(:user)
+      user2 = create(:user)
+
+      topic1 = create(:topic, community: community, author: user1)
+      create(:comment, commentable: topic1, author: user1)
+      create(:comment, commentable: topic1, author: user2)
+      topic2 = create(:topic, community: community, author: user2)
+
+      expect(community.participants).to eq [user1, user2]
+    end
+  end
 end

spec/models/user_spec.rb

@@ -681,21 +681,4 @@ describe User do
 
   end
 
-  describe "#community_participants" do
-
-    it "should return participants without duplicates" do
-      proposal = create(:proposal)
-      community = proposal.community
-      user1 = create(:user)
-      user2 = create(:user)
-
-      topic1 = create(:topic, community: community, author: user1)
-      create(:comment, commentable: topic1, author: user1)
-      create(:comment, commentable: topic1, author: user2)
-      topic2 = create(:topic, community: community, author: user2)
-
-      expect(User.community_participants(community)).to eq [user1, user2]
-    end
-  end
-
 end