Allow Module#depends_on to accept multiple modules

actionpack/lib/action_controller/base/verification.rb

@@ -4,10 +4,7 @@ module ActionController #:nodoc:
 
     # TODO : Remove the defined? check when new base is the main base
     if defined?(ActionController::Http)
-      depends_on AbstractController::Callbacks
-      depends_on Session
-      depends_on Flash
-      depends_on Renderer
+      depends_on AbstractController::Callbacks, Session, Flash, Renderer
     end
 
     # This module provides a class-level method for specifying that certain

activesupport/lib/active_support/dependency_module.rb

@@ -16,10 +16,12 @@ module ActiveSupport
       end
     end
 
-    def depends_on(mod)
-      return if self < mod
+    def depends_on(*mods)
+      mods.each do |mod|
+        next if self < mod
         @_dependencies ||= []
         @_dependencies << mod
       end
     end
+  end
 end

activesupport/test/dependency_module_test.rb

@@ -42,6 +42,12 @@ class DependencyModuleTest < Test::Unit::TestCase
     end
   end
 
+  module Foo
+    extend ActiveSupport::DependencyModule
+
+    depends_on Bar, Baz
+  end
+
   def setup
     @klass = Class.new
   end
@@ -74,4 +80,9 @@ class DependencyModuleTest < Test::Unit::TestCase
     assert_equal "baz", @klass.baz
     assert_equal [DependencyModuleTest::Bar, DependencyModuleTest::Baz], @klass.included_modules[0..1]
   end
+
+  def test_depends_on_with_multiple_modules
+    @klass.send(:include, Foo)
+    assert_equal [DependencyModuleTest::Foo, DependencyModuleTest::Bar, DependencyModuleTest::Baz], @klass.included_modules[0..2]
+  end
 end