Use assert_respond_to because it has better error messaging

[#4628 state:resolved]

Signed-off-by: José Valim <jose.valim@gmail.com>

actionpack/test/abstract/translation_test.rb

@@ -9,18 +9,18 @@ class TranslationControllerTest < Test::Unit::TestCase
   end
   
   def test_action_controller_base_responds_to_translate
-    assert @controller.respond_to?(:translate)
+    assert_respond_to @controller, :translate
   end
   
   def test_action_controller_base_responds_to_t
-    assert @controller.respond_to?(:t)
+    assert_respond_to @controller, :t
   end
   
   def test_action_controller_base_responds_to_localize
-    assert @controller.respond_to?(:localize)
+    assert_respond_to @controller, :localize
   end
   
   def test_action_controller_base_responds_to_l
-    assert @controller.respond_to?(:l)
+    assert_respond_to @controller, :l
   end
 end

actionpack/test/controller/integration_test.rb

@@ -176,8 +176,8 @@ class IntegrationTestTest < Test::Unit::TestCase
     session1 = @test.open_session { |sess| }
     session2 = @test.open_session # implicit session
 
-    assert session1.respond_to?(:assert_template), "open_session makes assert_template available"
-    assert session2.respond_to?(:assert_template), "open_session makes assert_template available"
+    assert_respond_to session1, :assert_template, "open_session makes assert_template available"
+    assert_respond_to session2, :assert_template, "open_session makes assert_template available"
     assert !session1.equal?(session2)
   end
 

actionpack/test/controller/send_file_test.rb

@@ -55,8 +55,8 @@ class SendFileTest < ActionController::TestCase
     response = nil
     assert_nothing_raised { response = process('file') }
     assert_not_nil response
-    assert response.body_parts.respond_to?(:each)
-    assert response.body_parts.respond_to?(:to_path)
+    assert_respond_to response.body_parts, :each
+    assert_respond_to response.body_parts, :to_path
 
     require 'stringio'
     output = StringIO.new