FIX: Incorrect rate limit applied to topics invitation flow.

spec/models/topic_spec.rb

@@ -469,6 +469,35 @@ describe Topic do
     let(:topic) { Fabricate(:topic, user: user) }
     let(:another_user) { Fabricate(:user) }
 
+  context 'rate limits' do
+    before do
+      SiteSetting.max_topic_invitations_per_day = 2
+      RateLimiter.enable
+    end
+
+    after do
+      RateLimiter.clear_all!
+      RateLimiter.disable
+    end
+
+    it "rate limits topic invitations" do
+
+      start = Time.now.tomorrow.beginning_of_day
+      freeze_time(start)
+
+      user = Fabricate(:user)
+      trust_level_2 = Fabricate(:user, trust_level: 2)
+      topic = Fabricate(:topic, user: trust_level_2)
+
+      topic.invite(topic.user, user.username)
+      topic.invite(topic.user, "walter@white.com")
+
+      expect {
+        topic.invite(topic.user, "user@example.com")
+      }.to raise_error(RateLimiter::LimitExceeded)
+    end
+  end
+
     describe 'when username_or_email is not valid' do
       it 'should return the right value' do
         expect do