1 files changed, 51 insertions, 0 deletions
diff --git a/activesupport/test/core_ext/range_ext_test.rb b/activesupport/test/core_ext/range_ext_test.rb
index e8890ac835..c4945ee985 100644
--- a/activesupport/test/core_ext/range_ext_test.rb
+++ b/activesupport/test/core_ext/range_ext_test.rb
@@ -10,4 +10,55 @@ class RangeTest < Test::Unit::TestCase
     date_range = Time.utc(2005, 12, 10, 15, 30)..Time.utc(2005, 12, 10, 17, 30)
     assert_equal "BETWEEN '2005-12-10 15:30:00' AND '2005-12-10 17:30:00'", date_range.to_s(:db)
   end
+  
+  def test_overlaps_last_inclusive
+    assert((1..5).overlaps?(5..10))
+  end
+
+  def test_overlaps_last_exclusive
+    assert !(1...5).overlaps?(5..10)
+  end
+
+  def test_overlaps_first_inclusive
+    assert((5..10).overlaps?(1..5))
+  end
+  
+  def test_overlaps_first_exclusive
+    assert !(5..10).overlaps?(1...5)
+  end
+  
+  def test_should_include_identical_inclusive
+    assert((1..10).include?(1..10))
+  end
+
+  def test_should_include_identical_exclusive
+    assert((1...10).include?(1...10))
+  end
+
+  def test_should_include_other_with_exlusive_end
+    assert((1..10).include?(1...10))
+  end
+
+  def test_exclusive_end_should_not_include_identical_with_inclusive_end
+    assert !(1...10).include?(1..10)
+  end
+
+  def test_should_not_include_overlapping_first
+    assert !(2..8).include?(1..3)
+  end
+  
+  def test_should_not_include_overlapping_last
+    assert !(2..8).include?(5..9)
+  end
+  
+  def test_blockless_step
+    assert_equal [1,3,5,7,9], (1..10).step(2)
+  end
+
+  def test_original_step
+    array = []
+    (1..10).step(2) {|i| array << i }
+    assert_equal [1,3,5,7,9], array
+  end
+  
 end