/*
Copyright 2015 Google Inc. All rights reserved.

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 spdy

import (
	"net/http"
	"net/http/httptest"
	"testing"
)

func TestUpgradeResponse(t *testing.T) {
	testCases := []struct {
		connectionHeader string
		upgradeHeader    string
		shouldError      bool
	}{
		{
			connectionHeader: "",
			upgradeHeader:    "",
			shouldError:      true,
		},
		{
			connectionHeader: "Upgrade",
			upgradeHeader:    "",
			shouldError:      true,
		},
		{
			connectionHeader: "",
			upgradeHeader:    "SPDY/3.1",
			shouldError:      true,
		},
		{
			connectionHeader: "Upgrade",
			upgradeHeader:    "SPDY/3.1",
			shouldError:      false,
		},
	}

	for i, testCase := range testCases {
		server := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
			upgrader := NewResponseUpgrader()
			conn := upgrader.UpgradeResponse(w, req, nil)
			haveErr := conn == nil
			if e, a := testCase.shouldError, haveErr; e != a {
				t.Fatalf("%d: expected shouldErr=%t, got %t", i, testCase.shouldError, haveErr)
			}
			if haveErr {
				return
			}
			if conn == nil {
				t.Fatalf("%d: unexpected nil conn", i)
			}
			defer conn.Close()
		}))
		defer server.Close()

		req, err := http.NewRequest("GET", server.URL, nil)
		if err != nil {
			t.Fatalf("%d: error creating request: %s", i, err)
		}

		req.Header.Set("Connection", testCase.connectionHeader)
		req.Header.Set("Upgrade", testCase.upgradeHeader)

		client := &http.Client{}
		resp, err := client.Do(req)
		if err != nil {
			t.Fatalf("%d: unexpected non-nil err from client.Do: %s", i, err)
		}

		if testCase.shouldError {
			continue
		}

		if resp.StatusCode != http.StatusSwitchingProtocols {
			t.Fatalf("%d: expected status 101 switching protocols, got %d", i, resp.StatusCode)
		}
	}
}
