2 files changed, 39 insertions, 0 deletions
diff --git a/activemodel/test/cases/forbidden_attributes_protection_test.rb b/activemodel/test/cases/forbidden_attributes_protection_test.rb
new file mode 100644
index 0000000000..d3088b4fc2
--- /dev/null
+++ b/activemodel/test/cases/forbidden_attributes_protection_test.rb
@@ -0,0 +1,32 @@
+require 'cases/helper'
+require 'models/mass_assignment_specific'
+
+class ActiveModelMassUpdateProtectionTest < ActiveSupport::TestCase
+  test "forbidden attributes cannot be used for mass updating" do
+    params = { "a" => "b" }
+    class << params
+      define_method(:permitted?) { false }
+    end
+    assert_raises(ActiveModel::ForbiddenAttributes) do
+      SpecialPerson.new.sanitize_for_mass_assignment(params)
+    end
+  end
+
+  test "permitted attributes can be used for mass updating" do
+    params = { "a" => "b" }
+    class << params
+      define_method(:permitted?) { true }
+    end
+    assert_nothing_raised do
+      assert_equal({ "a" => "b" },
+        SpecialPerson.new.sanitize_for_mass_assignment(params))
+    end
+  end
+
+  test "regular attributes should still be allowed" do
+    assert_nothing_raised do
+      assert_equal({ a: "b" },
+        SpecialPerson.new.sanitize_for_mass_assignment(a: "b"))
+    end
+  end
+end
diff --git a/activemodel/test/models/mass_assignment_specific.rb b/activemodel/test/models/mass_assignment_specific.rb
index 1d123fa58c..1bf828ad43 100644
--- a/activemodel/test/models/mass_assignment_specific.rb
+++ b/activemodel/test/models/mass_assignment_specific.rb
@@ -20,6 +20,13 @@ class Person
   public :sanitize_for_mass_assignment
 end
 
+class SpecialPerson
+  include ActiveModel::MassAssignmentSecurity
+  include ActiveModel::ForbiddenAttributesProtection
+
+  public :sanitize_for_mass_assignment
+end
+
 class Account
   include ActiveModel::MassAssignmentSecurity
   attr_accessible :name, :email, :as => [:default, :admin]