hunk.code_window: 		// replace config with generated config
   		oldConfig := th.App.Config().Clone()
   		th.App.UpdateConfig(func(cfg *model.Config) { *cfg = *retrievedConfig })
   		resp, appErr = th.Client.DoApiGet(th.Client.GetSystemRoute()+"/ping", "")
   		require.Nil(t, appErr)
   		require.Equal(t, http.StatusOK, resp.StatusCode)
   		respBytes, err = ioutil.ReadAll(resp.Body)
   		require.Nil(t, err)
  
hunk.labels: keep keep keep keep keep replace keep keep keep keep
hunk.after_edit: 		resp, appErr = client.DoApiGet(client.GetSystemRoute()+"/ping", "")
  
hunk.file_path: api4/system_test.go
hunk.type: replace
file: // Copyright (c) 2017 Uber Technologies, Inc.
  //
  // Licensed under the Apache License, Version 2.0 (the "License");
  // you may not use this file except in compliance with the License.
  // You may obtain a copy of the License at
  //
  // http://www.apache.org/licenses/LICENSE-2.0
  //
  // Unless required by applicable law or agreed to in writing, software
  // distributed under the License is distributed on an "AS IS" BASIS,
  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  // See the License for the specific language governing permissions and
  // limitations under the License.
  
  // Package zipkin comprises Zipkin functionality for Zipkin compatibility.
  package zipkin
  