Disallow creating inverse relates issue relations (#27663).

Patch by Gregor Schmidt.


git-svn-id: http://svn.redmine.org/redmine/trunk@17056 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/functional/issue_relations_controller_test.rb

@@ -82,8 +82,8 @@ class IssueRelationsControllerTest < Redmine::ControllerTest
       assert_equal 'text/javascript', response.content_type
     end
     relation = IssueRelation.order('id DESC').first
-    assert_equal 3, relation.issue_from_id
-    assert_equal 1, relation.issue_to_id
+    assert_equal 1, relation.issue_from_id
+    assert_equal 3, relation.issue_to_id
 
     assert_include 'Bug #1', response.body
   end

test/unit/issue_relation_test.rb

@@ -65,6 +65,20 @@ class IssueRelationTest < ActiveSupport::TestCase
     assert_equal from, relation.issue_to
   end
 
+  def test_cannot_create_inverse_relates_relations
+    from = Issue.find(1)
+    to = Issue.find(2)
+
+    relation1 = IssueRelation.new :issue_from => from, :issue_to => to,
+                                  :relation_type => IssueRelation::TYPE_RELATES
+    assert relation1.save
+
+    relation2 = IssueRelation.new :issue_from => to, :issue_to => from,
+                                  :relation_type => IssueRelation::TYPE_RELATES
+    assert !relation2.save
+    assert_not_equal [], relation2.errors[:base]
+  end
+
   def test_follows_relation_should_not_be_reversed_if_validation_fails
     from = Issue.find(1)
     to = Issue.find(2)