$ RAILS_ENV=test bundle exec rake db:migrate:reset

$ RAILS_ENV=test bundle exec rake test TESTOPTS="--seed 4619"

.......................................................E

Error:
RepositoryTest#test_scan_changesets_for_issue_ids:
NoMethodError: undefined method `body' for nil:NilClass
    test/test_helper.rb:253:in `mail_body'
    test/test_helper.rb:238:in `assert_mail_body_match'
    test/unit/repository_test.rb:275:in `block in test_scan_changesets_for_issue_ids'
    test/unit/repository_test.rb:271:in `each'
    test/unit/repository_test.rb:271:in `test_scan_changesets_for_issue_ids'


bin/rails test test/unit/repository_test.rb:237

The test failed because @Settings.plain_text_mail@ is not set.
Solved by the following patch.

diff --git a/test/unit/repository_test.rb b/test/unit/repository_test.rb
index 1d7d572c3..18bec60f0 100644
--- a/test/unit/repository_test.rb
+++ b/test/unit/repository_test.rb
@@ -235,49 +235,53 @@ class RepositoryTest < ActiveSupport::TestCase
   end

   def test_scan_changesets_for_issue_ids
-    Setting.default_language = 'en'
-    Setting.commit_ref_keywords = 'refs , references, IssueID'
-    Setting.commit_update_keywords = [
-      {'keywords' => 'fixes , closes',
-       'status_id' => IssueStatus.where(:is_closed => true).first.id,
-       'done_ratio' => '90'}
-    ]
-    Setting.default_language = 'en'
-    ActionMailer::Base.deliveries.clear
-
-    # make sure issue 1 is not already closed
-    fixed_issue = Issue.find(1)
-    assert !fixed_issue.closed?
-    old_status = fixed_issue.status
-
-    with_settings :notified_events => %w(issue_added issue_updated) do
+    with_settings(
+      :default_language => 'en',
+      :commit_ref_keywords => 'refs , references, IssueID',
+      :commit_update_keywords => [
+        {
+          'keywords' => 'fixes , closes',
+          'status_id' => IssueStatus.where(:is_closed => true).first.id,
+          'done_ratio' => '90'
+        }
+      ],
+      :notified_events => %w(issue_added issue_updated),
+      :plain_text_mail => '0'
+    ) do
+      ActionMailer::Base.deliveries.clear
+
+      # make sure issue 1 is not already closed
+      fixed_issue = Issue.find(1)
+      assert !fixed_issue.closed?
+      old_status = fixed_issue.status
+
       Repository.scan_changesets_for_issue_ids
-    end
-    assert_equal [101, 102], Issue.find(3).changeset_ids
-
-    # fixed issues
-    fixed_issue.reload
-    assert fixed_issue.closed?
-    assert_equal 90, fixed_issue.done_ratio
-    assert_equal [101], fixed_issue.changeset_ids
-
-    # issue change
-    journal = fixed_issue.journals.reorder('created_on desc').first
-    assert_equal User.find_by_login('dlopper'), journal.user
-    assert_equal 'Applied in changeset r2.', journal.notes
-
-    # 5 email notifications, 2 for #1, 3 for #2
-    assert_equal 5, ActionMailer::Base.deliveries.size
-    ActionMailer::Base.deliveries.first(2).each do |mail|
-      assert_not_nil mail
-      assert mail.subject.starts_with?(
-          "[#{fixed_issue.project.name} - #{fixed_issue.tracker.name} ##{fixed_issue.id}]")
-      assert_mail_body_match(
-          "Status changed from #{old_status} to #{fixed_issue.status}", mail)
-    end
+      assert_equal [101, 102], Issue.find(3).changeset_ids
+
+      # fixed issues
+      fixed_issue.reload
+      assert fixed_issue.closed?
+      assert_equal 90, fixed_issue.done_ratio
+      assert_equal [101], fixed_issue.changeset_ids
+
+      # issue change
+      journal = fixed_issue.journals.reorder('created_on desc').first
+      assert_equal User.find_by_login('dlopper'), journal.user
+      assert_equal 'Applied in changeset r2.', journal.notes
+
+      # 5 email notifications, 2 for #1, 3 for #2
+      assert_equal 5, ActionMailer::Base.deliveries.size
+      ActionMailer::Base.deliveries.first(2).each do |mail|
+        assert_not_nil mail
+        assert mail.subject.starts_with?(
+            "[#{fixed_issue.project.name} - #{fixed_issue.tracker.name} ##{fixed_issue.id}]")
+        assert_mail_body_match(
+            "Status changed from #{old_status} to #{fixed_issue.status}", mail)
+      end

-    # ignoring commits referencing an issue of another project
-    assert_equal [], Issue.find(4).changesets
+      # ignoring commits referencing an issue of another project
+      assert_equal [], Issue.find(4).changesets
+    end
   end

   def test_for_changeset_comments_strip