Index: test/fixtures/trackers.yml
===================================================================
--- test/fixtures/trackers.yml	(revision 16545)
+++ test/fixtures/trackers.yml	(working copy)
@@ -5,6 +5,7 @@
   is_in_chlog: true
   default_status_id: 1
   position: 1
+  description: Description for Bug tracker
 trackers_002: 
   name: Feature request
   id: 2
Index: test/functional/issues_controller_test.rb
===================================================================
--- test/functional/issues_controller_test.rb	(revision 16545)
+++ test/functional/issues_controller_test.rb	(working copy)
@@ -1814,6 +1814,8 @@
       assert_select 'input[name=?]', 'issue[is_private]'
       assert_select 'select[name=?]', 'issue[project_id]', 0
       assert_select 'select[name=?]', 'issue[tracker_id]'
+      assert_select '#display_tracker_description'
+      assert_select '#trackers_description_dialog'
       assert_select 'input[name=?]', 'issue[subject]'
       assert_select 'textarea[name=?]', 'issue[description]'
       assert_select 'select[name=?]', 'issue[status_id]'
@@ -1848,6 +1850,8 @@
       assert_select 'input[name=?]', 'issue[is_private]', 0
       assert_select 'select[name=?]', 'issue[project_id]', 0
       assert_select 'select[name=?]', 'issue[tracker_id]'
+      assert_select '#display_tracker_description'
+      assert_select '#trackers_description_dialog'
       assert_select 'input[name=?]', 'issue[subject]'
       assert_select 'textarea[name=?]', 'issue[description]'
       assert_select 'select[name=?]', 'issue[status_id]'
@@ -1872,6 +1876,8 @@
     assert_select 'form#issue-form[action=?]', '/issues'
     assert_select 'form#issue-form' do
       assert_select 'select[name=?]', 'issue[project_id]'
+      assert_select '#display_tracker_description'
+      assert_select '#trackers_description_dialog'
     end
   end
 
@@ -1930,6 +1936,8 @@
       assert_select 'option[value="1"]'
       assert_select 'option[value="3"]'
     end
+    # tracker description dialog has the same numbers of tracker.
+    assert_select '#trackers_description_dialog table tr', 2
   end
 
   def test_new_should_default_to_first_tracker
@@ -1941,6 +1949,9 @@
       assert_select 'option', 3
       assert_select 'option[value="1"][selected=selected]'
     end
+    assert_select '#display_tracker_description'
+    # tracker description dialog has the same numbers of tracker.
+    assert_select '#trackers_description_dialog table tr', 3
   end
 
   def test_new_with_parent_issue_id_should_default_to_first_tracker_without_disabled_parent_field
@@ -1956,6 +1967,8 @@
       assert_select 'option[value="2"][selected=selected]'
       assert_select 'option[value="1"]', 0
     end
+    assert_select '#display_tracker_description'
+    assert_select '#trackers_description_dialog table tr[name="1"]', 0
   end
 
   def test_new_without_allowed_trackers_should_respond_with_403
Index: test/integration/issues_test.rb
===================================================================
--- test/integration/issues_test.rb	(revision 16545)
+++ test/integration/issues_test.rb	(working copy)
@@ -223,6 +223,9 @@
       assert_select 'option[value=?]', tester.id.to_s, :text => tester.name
     end
 
+    assert_select '#display_tracker_description'
+    assert_select '#trackers_description_dialog'
+
     # Create issue
     issue = new_record(Issue) do
       post '/projects/ecookbook/issues',
Index: test/ui/tracker_description_test_ui.rb
===================================================================
--- test/ui/tracker_description_test_ui.rb	(nonexistent)
+++ test/ui/tracker_description_test_ui.rb	(working copy)
@@ -0,0 +1,50 @@
+require File.expand_path('../base', __FILE__)
+
+class Redmine::UiTest::TrackerDescriptionTest < Redmine::UiTest::Base
+  fixtures :projects, :users, :email_addresses, :roles, :members, :member_roles,
+           :trackers, :projects_trackers, :enabled_modules, :issue_statuses, :issues,
+           :enumerations
+
+  def test_tracker_descriptions_on_project_overview
+    log_user('jsmith', 'jsmith')
+    visit '/projects/ecookbook'
+    within('div.issues.box > table') do
+      within('tr:nth-child(1) td.name') do
+        assert_selector(:css, '.tooltip_body', visible: false)
+        find('div > a').hover
+        assert_selector(:css, '.tooltip_body')
+      end
+    end
+  end
+
+  def test_tracker_descriptions_on_project_setting
+    log_user('admin', 'admin')
+    visit '/projects/ecookbook/settings'
+    within('#project_trackers') do
+      within('label:nth-child(2)') do
+        assert_selector(:css, '.tooltip_body', visible: false)
+        find("input[type='checkbox']").hover
+        assert_selector(:css, '.tooltip_body')
+      end
+    end
+  end
+
+  # Test for Tracker Description
+  def test_tracker_description_dialog
+    log_user('jsmith', 'jsmith')
+    visit '/projects/ecookbook/issues/new'
+    tracker_count = page.all('#issue_tracker_id option').size
+    within('form#issue-form') do
+      assert_selector(:css, '#trackers_description_dialog', visible: :hidden)
+      find('#display_tracker_description').click
+    end
+    assert_selector(:css, '#trackers_description_dialog')
+    # dialog has the same number of table rows to tracker_id pulldown.
+    within('#trackers_description_dialog') do
+      assert page.has_css?('table tbody tr', count: tracker_count)
+      assert page.has_css?("tr[name='3']")
+      find("tr[name='2'] td a.icon-test").click
+    end
+    assert_equal find('#issue_tracker_id').value, '2'
+  end
+end
Index: test/unit/tracker_test.rb
===================================================================
--- test/unit/tracker_test.rb	(revision 16545)
+++ test/unit/tracker_test.rb	(working copy)
@@ -128,4 +128,10 @@
       end
     end
   end
+
+  def test_tracker_should_have_description
+    tracker = Tracker.find(1)
+    assert tracker.respond_to?(:description)
+    assert_equal tracker.description, "Description for Bug tracker"
+  end
 end