Fixed: Circular loop when using relations and subtasks (#8794).

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@11641 e93f8b46-1217-0410-a6f0-8f06a7374b81

test/unit/issue_test.rb

@@ -1531,6 +1531,36 @@ class IssueTest < ActiveSupport::TestCase
     assert child.save
   end
 
+  def test_setting_parent_to_a_dependent_issue_should_not_validate
+    set_language_if_valid 'en'
+    issue1 = Issue.generate!
+    issue2 = Issue.generate!
+    issue3 = Issue.generate!
+    IssueRelation.create!(:issue_from => issue1, :issue_to => issue2, :relation_type => IssueRelation::TYPE_PRECEDES)
+    IssueRelation.create!(:issue_from => issue3, :issue_to => issue1, :relation_type => IssueRelation::TYPE_PRECEDES)
+    issue3.reload
+    issue3.parent_issue_id = issue2.id
+    assert !issue3.valid?
+    assert_include 'Parent task is invalid', issue3.errors.full_messages
+  end
+
+  def test_setting_parent_should_not_allow_circular_dependency
+    set_language_if_valid 'en'
+    issue1 = Issue.generate!
+    issue2 = Issue.generate!
+    IssueRelation.create!(:issue_from => issue1, :issue_to => issue2, :relation_type => IssueRelation::TYPE_PRECEDES)
+    issue3 = Issue.generate!
+    issue2.reload
+    issue2.parent_issue_id = issue3.id
+    issue2.save!
+    issue4 = Issue.generate!
+    IssueRelation.create!(:issue_from => issue3, :issue_to => issue4, :relation_type => IssueRelation::TYPE_PRECEDES)
+    issue4.reload
+    issue4.parent_issue_id = issue1.id
+    assert !issue4.valid?
+    assert_include 'Parent task is invalid', issue4.errors.full_messages
+  end
+
   def test_overdue
     assert Issue.new(:due_date => 1.day.ago.to_date).overdue?
     assert !Issue.new(:due_date => Date.today).overdue?