Move custom compound status method to commit status

app/models/commit_status.rb

@@ -103,6 +103,12 @@ class CommitStatus < ActiveRecord::Base
     end
   end
 
+  def self.status
+    super.tap do |status|
+      return 'success' if status == 'skipped' && all.failed_but_allowed.any?
+    end
+  end
+
   def locking_enabled?
     status_changed?
   end

app/models/concerns/has_status.rb

@@ -37,9 +37,7 @@ module HasStatus
     end
 
     def status
-      all.pluck(status_sql).first.tap do |status|
-        return 'success' if status == 'skipped' && all.failed_but_allowed.any?
-      end
+      all.pluck(status_sql).first
     end
 
     def started_at

spec/models/commit_status_spec.rb

@@ -284,6 +284,30 @@ describe CommitStatus, :models do
     end
   end
 
+  describe '.status' do
+    context 'when there are multiple statuses present' do
+      before do
+        create_status(status: 'running')
+        create_status(status: 'success')
+        create_status(allow_failure: true, status: 'failed')
+      end
+
+      it 'returns a correct compound status' do
+        expect(described_class.all.status).to eq 'running'
+      end
+    end
+
+    context 'when there are only allowed to fail commit statuses present' do
+      before do
+        create_status(allow_failure: true, status: 'failed')
+      end
+
+      it 'returns status that indicates success' do
+        expect(described_class.all.status).to eq 'success'
+      end
+    end
+  end
+
   describe '#before_sha' do
     subject { commit_status.before_sha }