Do not do assertions on mail class.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@8991 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/unit/mailer_test.rb

@@ -43,7 +43,7 @@ class MailerTest < ActiveSupport::TestCase
     assert Mailer.deliver_issue_edit(journal)
 
     mail = ActionMailer::Base.deliveries.last
-    assert_kind_of TMail::Mail, mail
+    assert_not_nil mail
 
     assert_select_email do
       # link to the main ticket
@@ -73,7 +73,7 @@ class MailerTest < ActiveSupport::TestCase
     assert Mailer.deliver_issue_edit(journal)
 
     mail = ActionMailer::Base.deliveries.last
-    assert_kind_of TMail::Mail, mail
+    assert_not_nil mail
 
     assert_select_email do
       # link to the main ticket
@@ -106,7 +106,7 @@ class MailerTest < ActiveSupport::TestCase
     assert Mailer.deliver_issue_edit(journal)
 
     mail = ActionMailer::Base.deliveries.last
-    assert_kind_of TMail::Mail, mail
+    assert_not_nil mail
 
     assert_select_email do
       # link to the main ticket

test/unit/repository_test.rb

@@ -173,7 +173,7 @@ class RepositoryTest < ActiveSupport::TestCase
     # 2 email notifications
     assert_equal 2, ActionMailer::Base.deliveries.size
     mail = ActionMailer::Base.deliveries.first
-    assert_kind_of TMail::Mail, mail
+    assert_not_nil mail
     assert mail.subject.starts_with?(
         "[#{fixed_issue.project.name} - #{fixed_issue.tracker.name} ##{fixed_issue.id}]")
     assert mail.body.include?(