votes: allow Members to vote.

* Allow Member-level users to vote.
* Don't allow Banned or Restricted users to create favorites any more.

Banned and Restricted users aren't allowed to upvote or favorite any
more to prevent sockpuppet accounts from upvoting even after they're
banned.

app/policies/favorite_policy.rb

@@ -1,6 +1,6 @@
 class FavoritePolicy < ApplicationPolicy
   def create?
-    !user.is_anonymous?
+    unbanned? && user.is_member?
   end
 
   def destroy?

app/policies/post_vote_policy.rb

@@ -1,6 +1,6 @@
 class PostVotePolicy < ApplicationPolicy
   def create?
-    unbanned? && user.is_gold?
+    unbanned? && user.is_member?
   end
 
   def destroy?

test/factories/user.rb

@@ -8,6 +8,7 @@ FactoryBot.define do
     factory(:banned_user) do
       transient { ban_duration {3} }
       is_banned {true}
+      active_ban factory: :ban
     end
 
     factory(:restricted_user) do

test/functional/favorites_controller_test.rb

@@ -48,12 +48,21 @@ class FavoritesControllerTest < ActionDispatch::IntegrationTest
         end
       end
 
-      should "allow banned users to create favorites" do
+      should "not allow banned users to create favorites" do
         @banned_user = create(:banned_user)
 
-        assert_difference [-> { @post.favorites.count }, -> { @post.reload.fav_count }, -> { @banned_user.reload.favorite_count }], 1 do
+        assert_difference [-> { @post.favorites.count }, -> { @post.reload.fav_count }, -> { @banned_user.reload.favorite_count }], 0 do
           post_auth favorites_path(post_id: @post.id), @banned_user, as: :javascript
-          assert_response :redirect
+          assert_response 403
+        end
+      end
+
+      should "not allow restricted users to create favorites" do
+        @restricted_user = create(:restricted_user)
+
+        assert_difference [-> { @post.favorites.count }, -> { @post.reload.fav_count }, -> { @restricted_user.reload.favorite_count }], 0 do
+          post_auth favorites_path(post_id: @post.id), @restricted_user, as: :javascript
+          assert_response 403
         end
       end
 

test/functional/post_votes_controller_test.rb

@@ -185,13 +185,20 @@ class PostVotesControllerTest < ActionDispatch::IntegrationTest
         assert_equal(0, @post.reload.score)
       end
 
-      should "not allow members to vote" do
-        post_auth post_post_votes_path(post_id: @post.id), create(:user), params: { score: 1, format: "js" }
+      should "not allow restricted users to vote" do
+        post_auth post_post_votes_path(post_id: @post.id), create(:restricted_user), params: { score: 1, format: "js"}
 
         assert_response 403
         assert_equal(0, @post.reload.score)
       end
 
+      should "allow members to vote" do
+        post_auth post_post_votes_path(post_id: @post.id), create(:user), params: { score: 1, format: "js" }
+
+        assert_response :success
+        assert_equal(1, @post.reload.score)
+      end
+
       should "not allow invalid scores" do
         post_auth post_post_votes_path(post_id: @post.id), @user, params: { score: 3, format: "js" }