Allow symbol as values for `tokenize` of `LengthValidator`

2 files changed, 17 insertions, 0 deletions

diff --git a/activemodel/test/cases/validations/length_validation_test.rb b/activemodel/test/cases/validations/length_validation_test.rb
index 046ffcb16f..3fa9f9274c 100644
--- a/activemodel/test/cases/validations/length_validation_test.rb
+++ b/activemodel/test/cases/validations/length_validation_test.rb
@@ -331,6 +331,19 @@ class LengthValidationTest < ActiveModel::TestCase
     assert_equal ["Your essay must be at least 5 words."], t.errors[:content]
   end
 
+
+  def test_validates_length_of_with_symbol
+    Topic.validates_length_of :content, minimum: 5, too_short: "Your essay must be at least %{count} words.",
+                                        tokenizer: :my_word_tokenizer
+    t = Topic.new(content: "this content should be long enough")
+    assert t.valid?
+
+    t.content = "not long enough"
+    assert t.invalid?
+    assert t.errors[:content].any?
+    assert_equal ["Your essay must be at least 5 words."], t.errors[:content]
+  end
+
   def test_validates_length_of_for_fixnum
     Topic.validates_length_of(:approved, is: 4)
 
diff --git a/activemodel/test/models/topic.rb b/activemodel/test/models/topic.rb
index 1411a093e9..fed50bc361 100644
--- a/activemodel/test/models/topic.rb
+++ b/activemodel/test/models/topic.rb
@@ -37,4 +37,8 @@ class Topic
     errors.add attr, "is missing" unless send(attr)
   end
 
+  def my_word_tokenizer(str)
+   str.scan(/\w+/)
+  end
+
 end