1 files changed, 14 insertions, 0 deletions
diff --git a/activemodel/test/cases/validations/length_validation_test.rb b/activemodel/test/cases/validations/length_validation_test.rb
index 499f6a5e31..2c97b762f1 100644
--- a/activemodel/test/cases/validations/length_validation_test.rb
+++ b/activemodel/test/cases/validations/length_validation_test.rb
@@ -112,6 +112,20 @@ class LengthValidationTest < ActiveModel::TestCase
     assert t.valid?
   end
 
+  def test_validates_length_of_using_within_with_exclusive_range
+    Topic.validates_length_of(:title, :within => 4...10)
+
+    t = Topic.new("title" => "9 chars!!")
+    assert t.valid?
+
+    t.title = "Now I'm 10"
+    assert !t.valid?
+    assert_equal ["is too long (maximum is 9 characters)"], t.errors[:title]
+
+    t.title = "Four"
+    assert t.valid?
+  end
+
   def test_optionally_validates_length_of_using_within
     Topic.validates_length_of :title, :content, :within => 3..5, :allow_nil => true