Pass TrailingPeriod hook when commit message is empty

Author: jawshooah

lib/overcommit/hook/commit_msg/trailing_period.rb

@@ -2,6 +2,8 @@ module Overcommit::Hook::CommitMsg
   # Ensures commit message subject lines do not have a trailing period
   class TrailingPeriod < Base
     def run
+      return :pass if empty_message?
+
       if commit_message_lines.first.rstrip.end_with?('.')
         return :warn, 'Please omit trailing period from commit message subject'
       end

spec/overcommit/hook/commit_msg/trailing_period_spec.rb

@@ -7,6 +7,13 @@
 
   before do
     subject.stub(:commit_message_lines).and_return(commit_msg.split("\n"))
+    subject.stub(:empty_message?).and_return(commit_msg.empty?)
+  end
+
+  context 'when commit message is empty' do
+    let(:commit_msg) { '' }
+
+    it { should pass }
   end
 
   context 'when subject contains a trailing period' do