istio

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// Copyright Istio Authors
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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//     http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package testserver
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import (
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	"net"
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	"net/http"
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	"net/http/httptest"
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)
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// CreateAndStartServer starts a server and returns the response passed.
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func CreateAndStartServer(response string) *httptest.Server {
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	return createHTTPServer(createDefaultFuncMap(response))
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}
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func createHTTPServer(handlers map[string]func(rw http.ResponseWriter, _ *http.Request)) *httptest.Server {
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	mux := http.NewServeMux()
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	for k, v := range handlers {
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		mux.HandleFunc(k, http.HandlerFunc(v))
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	}
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	// Start a local HTTP server
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	server := httptest.NewUnstartedServer(mux)
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	l, err := net.Listen("tcp", ":0")
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	if err != nil {
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		panic("Could not create listener for test: " + err.Error())
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	}
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	server.Listener = l
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	server.Start()
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	return server
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}
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func createDefaultFuncMap(statsToReturn string) map[string]func(rw http.ResponseWriter, _ *http.Request) {
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	return map[string]func(rw http.ResponseWriter, _ *http.Request){
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		"/stats": func(rw http.ResponseWriter, _ *http.Request) {
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			// Send response to be tested
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			_, err := rw.Write([]byte(statsToReturn))
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			if err != nil {
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				panic("Could not write response: " + err.Error())
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			}
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		},
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	}
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}
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