Accept a symbol for `:in` option on inclusion and exclusion validators

1 files changed, 22 insertions, 0 deletions

diff --git a/activemodel/test/cases/validations/exclusion_validation_test.rb b/activemodel/test/cases/validations/exclusion_validation_test.rb
index baccf72ecb..9f916dbfdd 100644
--- a/activemodel/test/cases/validations/exclusion_validation_test.rb
+++ b/activemodel/test/cases/validations/exclusion_validation_test.rb
@@ -64,4 +64,26 @@ class ExclusionValidationTest < ActiveModel::TestCase
     t.title = "wasabi"
     assert t.valid?
   end
+
+  def test_validates_inclusion_of_with_symbol
+    Person.validates_exclusion_of :karma, :in => :reserved_karmas
+
+    p = Person.new
+    p.karma = "abe"
+
+    def p.reserved_karmas
+      %w(abe)
+    end
+
+    assert p.invalid?
+    assert_equal ["is reserved"], p.errors[:karma]
+
+    def p.reserved_karmas
+      %w()
+    end
+
+    assert p.valid?
+  ensure
+    Person.reset_callbacks(:validate)
+  end
 end