Allow to create issues by email when it contains only quotes

Creates issue In case an email is forwarded
with only quotes and no new content.

Changelog: fixed

lib/gitlab/email/handler/create_issue_handler.rb

@@ -60,7 +60,7 @@ module Gitlab
             current_user: author,
             params: {
               title: mail.subject,
-              description: message_including_reply
+              description: message_including_reply_or_only_quotes
             },
             spam_params: nil
           ).execute

lib/gitlab/email/handler/reply_processing.rb

@@ -35,6 +35,10 @@ module Gitlab
           @message_with_reply ||= process_message(trim_reply: false)
         end
 
+        def message_including_reply_or_only_quotes
+          @message_including_reply_or_only_quotes ||= process_message(trim_reply: false, allow_only_quotes: true)
+        end
+
         def message_with_appended_reply
           @message_with_appended_reply ||= process_message(append_reply: true)
         end

lib/gitlab/email/handler/service_desk_handler.rb

@@ -108,7 +108,7 @@ module Gitlab
         end
 
         def message_including_template
-          description = process_message(trim_reply: false, allow_only_quotes: true)
+          description = message_including_reply_or_only_quotes
           template_content = service_desk_setting&.issue_template_content
 
           if template_content.present?

spec/fixtures/emails/valid_new_issue_with_only_quotes.eml

+Return-Path: <jake@adventuretime.ooo>
+Received: from iceking.adventuretime.ooo ([unix socket]) by iceking (Cyrus v2.2.13-Debian-2.2.13-19+squeeze3) with LMTPA; Thu, 13 Jun 2013 17:03:50 -0400
+Received: from mail-ie0-x234.google.com (mail-ie0-x234.google.com [IPv6:2607:f8b0:4001:c03::234]) by iceking.adventuretime.ooo (8.14.3/8.14.3/Debian-9.4) with ESMTP id r5DL3nFJ016967 (version=TLSv1/SSLv3 cipher=RC4-SHA bits=128 verify=NOT) for <incoming+gitlabhq/gitlabhq@appmail.adventuretime.ooo>; Thu, 13 Jun 2013 17:03:50 -0400
+Received: by mail-ie0-f180.google.com with SMTP id f4so21977375iea.25 for <incoming+gitlabhq-gitlabhq@appmail.adventuretime.ooo>; Thu, 13 Jun 2013 14:03:48 -0700
+Received: by 10.0.0.1 with HTTP; Thu, 13 Jun 2013 14:03:48 -0700
+Date: Thu, 13 Jun 2013 17:03:48 -0400
+From: Jake the Dog <jake@adventuretime.ooo>
+To: incoming+gitlabhq-gitlabhq-project_id-auth_token-issue@appmail.adventuretime.ooo
+Message-ID: <CADkmRc+rNGAGGbV2iE5p918UVy4UyJqVcXRO2=otppgzduJSg@mail.gmail.com>
+Subject: New Issue by email
+Mime-Version: 1.0
+Content-Type: text/plain;
+ charset=ISO-8859-1
+Content-Transfer-Encoding: 7bit
+X-Sieve: CMU Sieve 2.2
+X-Received: by 10.0.0.1 with SMTP id n7mr11234144ipb.85.1371157428600; Thu,
+ 13 Jun 2013 14:03:48 -0700 (PDT)
+X-Scanned-By: MIMEDefang 2.69 on IPv6:2001:470:1d:165::1
+
+> This email has been forwarded without new content.
+> There are only quotes.
+> Quote 1
+> Quote 2

spec/lib/gitlab/email/handler/create_issue_handler_spec.rb

@@ -101,6 +101,17 @@ RSpec.describe Gitlab::Email::Handler::CreateIssueHandler do
     end
   end
 
+  context 'when all lines of email are quotes' do
+    let(:email_raw) { email_fixture('emails/valid_new_issue_with_only_quotes.eml') }
+
+    it 'creates email with correct body' do
+      receiver.execute
+
+      issue = Issue.last
+      expect(issue.description).to include('This email has been forwarded without new content.')
+    end
+  end
+
   context "something is wrong" do
     context "when the issue could not be saved" do
       before do