1 files changed, 24 insertions, 4 deletions
diff --git a/actionpack/test/dispatch/request/json_params_parsing_test.rb b/actionpack/test/dispatch/request/json_params_parsing_test.rb
index a3dde72c4e..db6cf7b330 100644
--- a/actionpack/test/dispatch/request/json_params_parsing_test.rb
+++ b/actionpack/test/dispatch/request/json_params_parsing_test.rb
@@ -30,16 +30,36 @@ class JsonParamsParsingTest < ActionController::IntegrationTest
     )
   end
 
+  test "logs error if parsing unsuccessful" do
+    with_test_routing do
+      begin
+        $stderr = StringIO.new
+        json = "[\"person]\": {\"name\": \"David\"}}"
+        post "/parse", json, {'CONTENT_TYPE' => 'application/json'}
+        assert_response :error
+        $stderr.rewind && err = $stderr.read
+        assert err =~ /Error occurred while parsing request parameters/
+      ensure
+        $stderr = STDERR
+      end
+    end
+  end
+
   private
     def assert_parses(expected, actual, headers = {})
+      with_test_routing do
+        post "/parse", actual, headers
+        assert_response :ok
+        assert_equal(expected, TestController.last_request_parameters)
+      end
+    end
+
+    def with_test_routing
       with_routing do |set|
         set.draw do |map|
           map.connect ':action', :controller => "json_params_parsing_test/test"
         end
-
-        post "/parse", actual, headers
-        assert_response :ok
-        assert_equal(expected, TestController.last_request_parameters)
+        yield
       end
     end
 end