/*
   Copyright 2014-2021 Docker 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 spdystream

import (
	"bufio"
	"bytes"
	"fmt"
	"io"
	"io/ioutil"
	"net"
	"net/http"
	"net/http/httptest"
	"sync"
	"testing"
	"time"

	"github.com/moby/spdystream/spdy"
)

func TestSpdyStreams(t *testing.T) {
	var wg sync.WaitGroup
	server, listen, serverErr := runServer(&wg)
	if serverErr != nil {
		t.Fatalf("Error initializing server: %s", serverErr)
	}

	conn, dialErr := net.Dial("tcp", listen)
	if dialErr != nil {
		t.Fatalf("Error dialing server: %s", dialErr)
	}

	spdyConn, spdyErr := NewConnection(conn, false)
	if spdyErr != nil {
		t.Fatalf("Error creating spdy connection: %s", spdyErr)
	}
	go spdyConn.Serve(NoOpStreamHandler)

	authenticated = true
	stream, streamErr := spdyConn.CreateStream(http.Header{}, nil, false)
	if streamErr != nil {
		t.Fatalf("Error creating stream: %s", streamErr)
	}

	waitErr := stream.Wait()
	if waitErr != nil {
		t.Fatalf("Error waiting for stream: %s", waitErr)
	}

	message := []byte("hello")
	writeErr := stream.WriteData(message, false)
	if writeErr != nil {
		t.Fatalf("Error writing data")
	}

	buf := make([]byte, 10)
	n, readErr := stream.Read(buf)
	if readErr != nil {
		t.Fatalf("Error reading data from stream: %s", readErr)
	}
	if n != 5 {
		t.Fatalf("Unexpected number of bytes read:\nActual: %d\nExpected: 5", n)
	}
	if !bytes.Equal(buf[:n], message) {
		t.Fatalf("Did not receive expected message:\nActual: %s\nExpectd: %s", buf, message)
	}

	headers := http.Header{
		"TestKey": []string{"TestVal"},
	}
	sendErr := stream.SendHeader(headers, false)
	if sendErr != nil {
		t.Fatalf("Error sending headers: %s", sendErr)
	}
	receiveHeaders, receiveErr := stream.ReceiveHeader()
	if receiveErr != nil {
		t.Fatalf("Error receiving headers: %s", receiveErr)
	}
	if len(receiveHeaders) != 1 {
		t.Fatalf("Unexpected number of headers:\nActual: %d\nExpecting:%d", len(receiveHeaders), 1)
	}
	testVal := receiveHeaders.Get("TestKey")
	if testVal != "TestVal" {
		t.Fatalf("Wrong test value:\nActual: %q\nExpecting: %q", testVal, "TestVal")
	}

	writeErr = stream.WriteData(message, true)
	if writeErr != nil {
		t.Fatalf("Error writing data")
	}

	smallBuf := make([]byte, 3)
	n, readErr = stream.Read(smallBuf)
	if readErr != nil {
		t.Fatalf("Error reading data from stream: %s", readErr)
	}
	if n != 3 {
		t.Fatalf("Unexpected number of bytes read:\nActual: %d\nExpected: 3", n)
	}
	if !bytes.Equal(smallBuf[:n], []byte("hel")) {
		t.Fatalf("Did not receive expected message:\nActual: %s\nExpectd: %s", smallBuf[:n], message)
	}
	n, readErr = stream.Read(smallBuf)
	if readErr != nil {
		t.Fatalf("Error reading data from stream: %s", readErr)
	}
	if n != 2 {
		t.Fatalf("Unexpected number of bytes read:\nActual: %d\nExpected: 2", n)
	}
	if !bytes.Equal(smallBuf[:n], []byte("lo")) {
		t.Fatalf("Did not receive expected message:\nActual: %s\nExpected: lo", smallBuf[:n])
	}

	n, readErr = stream.Read(buf)
	if readErr != io.EOF {
		t.Fatalf("Expected EOF reading from finished stream, read %d bytes", n)
	}

	// Closing again should return error since stream is already closed
	streamCloseErr := stream.Close()
	if streamCloseErr == nil {
		t.Fatalf("No error closing finished stream")
	}
	if streamCloseErr != ErrWriteClosedStream {
		t.Fatalf("Unexpected error closing stream: %s", streamCloseErr)
	}

	streamResetErr := stream.Reset()
	if streamResetErr != nil {
		t.Fatalf("Error reseting stream: %s", streamResetErr)
	}

	authenticated = false
	badStream, badStreamErr := spdyConn.CreateStream(http.Header{}, nil, false)
	if badStreamErr != nil {
		t.Fatalf("Error creating stream: %s", badStreamErr)
	}

	waitErr = badStream.Wait()
	if waitErr == nil {
		t.Fatalf("Did not receive error creating stream")
	}
	if waitErr != ErrReset {
		t.Fatalf("Unexpected error creating stream: %s", waitErr)
	}
	streamCloseErr = badStream.Close()
	if streamCloseErr == nil {
		t.Fatalf("No error closing bad stream")
	}

	spdyCloseErr := spdyConn.Close()
	if spdyCloseErr != nil {
		t.Fatalf("Error closing spdy connection: %s", spdyCloseErr)
	}

	closeErr := server.Close()
	if closeErr != nil {
		t.Fatalf("Error shutting down server: %s", closeErr)
	}
	wg.Wait()
}

func TestPing(t *testing.T) {
	var wg sync.WaitGroup
	server, listen, serverErr := runServer(&wg)
	if serverErr != nil {
		t.Fatalf("Error initializing server: %s", serverErr)
	}

	conn, dialErr := net.Dial("tcp", listen)
	if dialErr != nil {
		t.Fatalf("Error dialing server: %s", dialErr)
	}

	spdyConn, spdyErr := NewConnection(conn, false)
	if spdyErr != nil {
		t.Fatalf("Error creating spdy connection: %s", spdyErr)
	}
	go spdyConn.Serve(NoOpStreamHandler)

	pingTime, pingErr := spdyConn.Ping()
	if pingErr != nil {
		t.Fatalf("Error pinging server: %s", pingErr)
	}
	if pingTime == time.Duration(0) {
		t.Fatalf("Expecting non-zero ping time")
	}

	closeErr := server.Close()
	if closeErr != nil {
		t.Fatalf("Error shutting down server: %s", closeErr)
	}
	wg.Wait()
}

func TestHalfClose(t *testing.T) {
	var wg sync.WaitGroup
	server, listen, serverErr := runServer(&wg)
	if serverErr != nil {
		t.Fatalf("Error initializing server: %s", serverErr)
	}

	conn, dialErr := net.Dial("tcp", listen)
	if dialErr != nil {
		t.Fatalf("Error dialing server: %s", dialErr)
	}

	spdyConn, spdyErr := NewConnection(conn, false)
	if spdyErr != nil {
		t.Fatalf("Error creating spdy connection: %s", spdyErr)
	}
	go spdyConn.Serve(NoOpStreamHandler)

	authenticated = true
	stream, streamErr := spdyConn.CreateStream(http.Header{}, nil, false)
	if streamErr != nil {
		t.Fatalf("Error creating stream: %s", streamErr)
	}

	waitErr := stream.Wait()
	if waitErr != nil {
		t.Fatalf("Error waiting for stream: %s", waitErr)
	}

	message := []byte("hello and will read after close")
	writeErr := stream.WriteData(message, false)
	if writeErr != nil {
		t.Fatalf("Error writing data")
	}

	streamCloseErr := stream.Close()
	if streamCloseErr != nil {
		t.Fatalf("Error closing stream: %s", streamCloseErr)
	}

	buf := make([]byte, 40)
	n, readErr := stream.Read(buf)
	if readErr != nil {
		t.Fatalf("Error reading data from stream: %s", readErr)
	}
	if n != 31 {
		t.Fatalf("Unexpected number of bytes read:\nActual: %d\nExpected: 5", n)
	}
	if !bytes.Equal(buf[:n], message) {
		t.Fatalf("Did not receive expected message:\nActual: %s\nExpectd: %s", buf, message)
	}

	spdyCloseErr := spdyConn.Close()
	if spdyCloseErr != nil {
		t.Fatalf("Error closing spdy connection: %s", spdyCloseErr)
	}

	closeErr := server.Close()
	if closeErr != nil {
		t.Fatalf("Error shutting down server: %s", closeErr)
	}
	wg.Wait()
}

func TestUnexpectedRemoteConnectionClosed(t *testing.T) {
	tt := []struct {
		closeReceiver bool
		closeSender   bool
	}{
		{closeReceiver: true, closeSender: false},
		{closeReceiver: false, closeSender: true},
		{closeReceiver: false, closeSender: false},
	}
	for tix, tc := range tt {
		listener, listenErr := net.Listen("tcp", "localhost:0")
		if listenErr != nil {
			t.Fatalf("Error listening: %v", listenErr)
		}

		var serverConn net.Conn
		var connErr error
		go func() {
			serverConn, connErr = listener.Accept()
			if connErr != nil {
				t.Errorf("Error accepting: %v", connErr)
			}

			serverSpdyConn, _ := NewConnection(serverConn, true)
			go serverSpdyConn.Serve(func(stream *Stream) {
				stream.SendReply(http.Header{}, tc.closeSender)
			})
		}()

		conn, dialErr := net.Dial("tcp", listener.Addr().String())
		if dialErr != nil {
			t.Fatalf("Error dialing server: %s", dialErr)
		}

		spdyConn, spdyErr := NewConnection(conn, false)
		if spdyErr != nil {
			t.Fatalf("Error creating spdy connection: %s", spdyErr)
		}
		go spdyConn.Serve(NoOpStreamHandler)

		authenticated = true
		stream, streamErr := spdyConn.CreateStream(http.Header{}, nil, false)
		if streamErr != nil {
			t.Fatalf("Error creating stream: %s", streamErr)
		}

		waitErr := stream.Wait()
		if waitErr != nil {
			t.Fatalf("Error waiting for stream: %s", waitErr)
		}

		if tc.closeReceiver {
			// make stream half closed, receive only
			stream.Close()
		}

		streamch := make(chan error, 1)
		go func() {
			b := make([]byte, 1)
			_, err := stream.Read(b)
			streamch <- err
		}()

		closeErr := serverConn.Close()
		if closeErr != nil {
			t.Fatalf("Error shutting down server: %s", closeErr)
		}

		e := <-streamch
		if e == nil || e != io.EOF {
			t.Fatalf("(%d) Expected to get an EOF stream error", tix)
		}

		closeErr = conn.Close()
		if closeErr != nil {
			t.Fatalf("Error closing client connection: %s", closeErr)
		}

		listenErr = listener.Close()
		if listenErr != nil {
			t.Fatalf("Error closing listener: %s", listenErr)
		}
	}
}

func TestCloseNotification(t *testing.T) {
	listener, listenErr := net.Listen("tcp", "localhost:0")
	if listenErr != nil {
		t.Fatalf("Error listening: %v", listenErr)
	}
	listen := listener.Addr().String()

	serverConnChan := make(chan net.Conn)
	go func() {
		serverConn, err := listener.Accept()
		if err != nil {
			t.Errorf("Error accepting: %v", err)
		}

		serverSpdyConn, err := NewConnection(serverConn, true)
		if err != nil {
			t.Errorf("Error creating server connection: %v", err)
		}
		go serverSpdyConn.Serve(NoOpStreamHandler)
		<-serverSpdyConn.CloseChan()
		serverConnChan <- serverConn
	}()

	conn, dialErr := net.Dial("tcp", listen)
	if dialErr != nil {
		t.Fatalf("Error dialing server: %s", dialErr)
	}

	spdyConn, spdyErr := NewConnection(conn, false)
	if spdyErr != nil {
		t.Fatalf("Error creating spdy connection: %s", spdyErr)
	}
	go spdyConn.Serve(NoOpStreamHandler)

	// close client conn
	err := conn.Close()
	if err != nil {
		t.Fatalf("Error closing client connection: %v", err)
	}

	serverConn := <-serverConnChan

	err = serverConn.Close()
	if err != nil {
		t.Fatalf("Error closing serverConn: %v", err)
	}

	listenErr = listener.Close()
	if listenErr != nil {
		t.Fatalf("Error closing listener: %s", listenErr)
	}
}

func TestIdleShutdownRace(t *testing.T) {
	var wg sync.WaitGroup
	server, listen, serverErr := runServer(&wg)
	if serverErr != nil {
		t.Fatalf("Error initializing server: %s", serverErr)
	}

	conn, dialErr := net.Dial("tcp", listen)
	if dialErr != nil {
		t.Fatalf("Error dialing server: %s", dialErr)
	}

	spdyConn, spdyErr := NewConnection(conn, false)
	if spdyErr != nil {
		t.Fatalf("Error creating spdy connection: %s", spdyErr)
	}
	go spdyConn.Serve(NoOpStreamHandler)

	authenticated = true
	stream, err := spdyConn.CreateStream(http.Header{}, nil, false)
	if err != nil {
		t.Fatalf("Error creating stream: %v", err)
	}

	spdyConn.SetIdleTimeout(5 * time.Millisecond)
	go func() {
		time.Sleep(5 * time.Millisecond)
		stream.Reset()
	}()

	select {
	case <-spdyConn.CloseChan():
	case <-time.After(20 * time.Millisecond):
		t.Fatal("Timed out waiting for idle connection closure")
	}

	closeErr := server.Close()
	if closeErr != nil {
		t.Fatalf("Error shutting down server: %s", closeErr)
	}
	wg.Wait()
}

func TestIdleNoTimeoutSet(t *testing.T) {
	var wg sync.WaitGroup
	server, listen, serverErr := runServer(&wg)
	if serverErr != nil {
		t.Fatalf("Error initializing server: %s", serverErr)
	}

	conn, dialErr := net.Dial("tcp", listen)
	if dialErr != nil {
		t.Fatalf("Error dialing server: %s", dialErr)
	}

	spdyConn, spdyErr := NewConnection(conn, false)
	if spdyErr != nil {
		t.Fatalf("Error creating spdy connection: %s", spdyErr)
	}
	go spdyConn.Serve(NoOpStreamHandler)

	select {
	case <-spdyConn.CloseChan():
		t.Fatal("Unexpected connection closure")
	case <-time.After(10 * time.Millisecond):
	}

	closeErr := server.Close()
	if closeErr != nil {
		t.Fatalf("Error shutting down server: %s", closeErr)
	}
	wg.Wait()
}

func TestIdleClearTimeout(t *testing.T) {
	var wg sync.WaitGroup
	server, listen, serverErr := runServer(&wg)
	if serverErr != nil {
		t.Fatalf("Error initializing server: %s", serverErr)
	}

	conn, dialErr := net.Dial("tcp", listen)
	if dialErr != nil {
		t.Fatalf("Error dialing server: %s", dialErr)
	}

	spdyConn, spdyErr := NewConnection(conn, false)
	if spdyErr != nil {
		t.Fatalf("Error creating spdy connection: %s", spdyErr)
	}
	go spdyConn.Serve(NoOpStreamHandler)

	spdyConn.SetIdleTimeout(10 * time.Millisecond)
	spdyConn.SetIdleTimeout(0)
	select {
	case <-spdyConn.CloseChan():
		t.Fatal("Unexpected connection closure")
	case <-time.After(20 * time.Millisecond):
	}

	closeErr := server.Close()
	if closeErr != nil {
		t.Fatalf("Error shutting down server: %s", closeErr)
	}
	wg.Wait()
}

func TestIdleNoData(t *testing.T) {
	var wg sync.WaitGroup
	server, listen, serverErr := runServer(&wg)
	if serverErr != nil {
		t.Fatalf("Error initializing server: %s", serverErr)
	}

	conn, dialErr := net.Dial("tcp", listen)
	if dialErr != nil {
		t.Fatalf("Error dialing server: %s", dialErr)
	}

	spdyConn, spdyErr := NewConnection(conn, false)
	if spdyErr != nil {
		t.Fatalf("Error creating spdy connection: %s", spdyErr)
	}
	go spdyConn.Serve(NoOpStreamHandler)

	spdyConn.SetIdleTimeout(10 * time.Millisecond)
	<-spdyConn.CloseChan()

	closeErr := server.Close()
	if closeErr != nil {
		t.Fatalf("Error shutting down server: %s", closeErr)
	}
	wg.Wait()
}

func TestIdleWithData(t *testing.T) {
	var wg sync.WaitGroup
	server, listen, serverErr := runServer(&wg)
	if serverErr != nil {
		t.Fatalf("Error initializing server: %s", serverErr)
	}

	conn, dialErr := net.Dial("tcp", listen)
	if dialErr != nil {
		t.Fatalf("Error dialing server: %s", dialErr)
	}

	spdyConn, spdyErr := NewConnection(conn, false)
	if spdyErr != nil {
		t.Fatalf("Error creating spdy connection: %s", spdyErr)
	}
	go spdyConn.Serve(NoOpStreamHandler)

	spdyConn.SetIdleTimeout(25 * time.Millisecond)

	authenticated = true
	stream, err := spdyConn.CreateStream(http.Header{}, nil, false)
	if err != nil {
		t.Fatalf("Error creating stream: %v", err)
	}

	writeCh := make(chan struct{})

	go func() {
		b := []byte{1, 2, 3, 4, 5}
		for i := 0; i < 10; i++ {
			_, err = stream.Write(b)
			if err != nil {
				t.Errorf("Error writing to stream: %v", err)
			}
			time.Sleep(10 * time.Millisecond)
		}
		close(writeCh)
	}()

	writesFinished := false

Loop:
	for {
		select {
		case <-writeCh:
			writesFinished = true
		case <-spdyConn.CloseChan():
			if !writesFinished {
				t.Fatal("Connection closed before all writes finished")
			}
			break Loop
		}
	}

	closeErr := server.Close()
	if closeErr != nil {
		t.Fatalf("Error shutting down server: %s", closeErr)
	}
	wg.Wait()
}

func TestIdleRace(t *testing.T) {
	var wg sync.WaitGroup
	server, listen, serverErr := runServer(&wg)
	if serverErr != nil {
		t.Fatalf("Error initializing server: %s", serverErr)
	}

	conn, dialErr := net.Dial("tcp", listen)
	if dialErr != nil {
		t.Fatalf("Error dialing server: %s", dialErr)
	}

	spdyConn, spdyErr := NewConnection(conn, false)
	if spdyErr != nil {
		t.Fatalf("Error creating spdy connection: %s", spdyErr)
	}
	go spdyConn.Serve(NoOpStreamHandler)

	spdyConn.SetIdleTimeout(10 * time.Millisecond)

	authenticated = true

	for i := 0; i < 10; i++ {
		_, err := spdyConn.CreateStream(http.Header{}, nil, false)
		if err != nil {
			t.Fatalf("Error creating stream: %v", err)
		}
	}

	<-spdyConn.CloseChan()

	closeErr := server.Close()
	if closeErr != nil {
		t.Fatalf("Error shutting down server: %s", closeErr)
	}
	wg.Wait()
}

func TestHalfClosedIdleTimeout(t *testing.T) {
	listener, listenErr := net.Listen("tcp", "localhost:0")
	if listenErr != nil {
		t.Fatalf("Error listening: %v", listenErr)
	}
	listen := listener.Addr().String()

	go func() {
		serverConn, err := listener.Accept()
		if err != nil {
			t.Errorf("Error accepting: %v", err)
		}

		serverSpdyConn, err := NewConnection(serverConn, true)
		if err != nil {
			t.Errorf("Error creating server connection: %v", err)
		}
		go serverSpdyConn.Serve(func(s *Stream) {
			s.SendReply(http.Header{}, true)
		})
		serverSpdyConn.SetIdleTimeout(10 * time.Millisecond)
	}()

	conn, dialErr := net.Dial("tcp", listen)
	if dialErr != nil {
		t.Fatalf("Error dialing server: %s", dialErr)
	}

	spdyConn, spdyErr := NewConnection(conn, false)
	if spdyErr != nil {
		t.Fatalf("Error creating spdy connection: %s", spdyErr)
	}
	go spdyConn.Serve(NoOpStreamHandler)

	stream, err := spdyConn.CreateStream(http.Header{}, nil, false)
	if err != nil {
		t.Fatalf("Error creating stream: %v", err)
	}

	time.Sleep(20 * time.Millisecond)

	stream.Reset()

	err = spdyConn.Close()
	if err != nil {
		t.Fatalf("Error closing client spdy conn: %v", err)
	}
}

func TestStreamReset(t *testing.T) {
	var wg sync.WaitGroup
	server, listen, serverErr := runServer(&wg)
	if serverErr != nil {
		t.Fatalf("Error initializing server: %s", serverErr)
	}

	conn, dialErr := net.Dial("tcp", listen)
	if dialErr != nil {
		t.Fatalf("Error dialing server: %s", dialErr)
	}

	spdyConn, spdyErr := NewConnection(conn, false)
	if spdyErr != nil {
		t.Fatalf("Error creating spdy connection: %s", spdyErr)
	}
	go spdyConn.Serve(NoOpStreamHandler)

	authenticated = true
	stream, streamErr := spdyConn.CreateStream(http.Header{}, nil, false)
	if streamErr != nil {
		t.Fatalf("Error creating stream: %s", streamErr)
	}

	buf := []byte("dskjahfkdusahfkdsahfkdsafdkas")
	for i := 0; i < 10; i++ {
		if _, err := stream.Write(buf); err != nil {
			t.Fatalf("Error writing to stream: %s", err)
		}
	}
	for i := 0; i < 10; i++ {
		if _, err := stream.Read(buf); err != nil {
			t.Fatalf("Error reading from stream: %s", err)
		}
	}

	// fmt.Printf("Resetting...\n")
	if err := stream.Reset(); err != nil {
		t.Fatalf("Error reseting stream: %s", err)
	}

	closeErr := server.Close()
	if closeErr != nil {
		t.Fatalf("Error shutting down server: %s", closeErr)
	}
	wg.Wait()
}

func TestStreamResetWithDataRemaining(t *testing.T) {
	var wg sync.WaitGroup
	server, listen, serverErr := runServer(&wg)
	if serverErr != nil {
		t.Fatalf("Error initializing server: %s", serverErr)
	}

	conn, dialErr := net.Dial("tcp", listen)
	if dialErr != nil {
		t.Fatalf("Error dialing server: %s", dialErr)
	}

	spdyConn, spdyErr := NewConnection(conn, false)
	if spdyErr != nil {
		t.Fatalf("Error creating spdy connection: %s", spdyErr)
	}
	go spdyConn.Serve(NoOpStreamHandler)

	authenticated = true
	stream, streamErr := spdyConn.CreateStream(http.Header{}, nil, false)
	if streamErr != nil {
		t.Fatalf("Error creating stream: %s", streamErr)
	}

	buf := []byte("dskjahfkdusahfkdsahfkdsafdkas")
	for i := 0; i < 10; i++ {
		if _, err := stream.Write(buf); err != nil {
			t.Fatalf("Error writing to stream: %s", err)
		}
	}

	// read a bit to make sure a goroutine gets to <-dataChan
	if _, err := stream.Read(buf); err != nil {
		t.Fatalf("Error reading from stream: %s", err)
	}

	// fmt.Printf("Resetting...\n")
	if err := stream.Reset(); err != nil {
		t.Fatalf("Error reseting stream: %s", err)
	}

	closeErr := server.Close()
	if closeErr != nil {
		t.Fatalf("Error shutting down server: %s", closeErr)
	}
	wg.Wait()
}

type roundTripper struct {
	conn net.Conn
}

func (s *roundTripper) RoundTrip(req *http.Request) (*http.Response, error) {
	r := *req
	req = &r

	conn, err := net.Dial("tcp", req.URL.Host)
	if err != nil {
		return nil, err
	}

	err = req.Write(conn)
	if err != nil {
		return nil, err
	}

	resp, err := http.ReadResponse(bufio.NewReader(conn), req)
	if err != nil {
		return nil, err
	}

	s.conn = conn

	return resp, nil
}

// see https://github.com/GoogleCloudPlatform/kubernetes/issues/4882
func TestFramingAfterRemoteConnectionClosed(t *testing.T) {
	server := httptest.NewUnstartedServer(http.HandlerFunc(func(w http.ResponseWriter, req *http.Request) {
		streamCh := make(chan *Stream)

		w.WriteHeader(http.StatusSwitchingProtocols)

		netconn, _, _ := w.(http.Hijacker).Hijack()
		conn, _ := NewConnection(netconn, true)
		go conn.Serve(func(s *Stream) {
			s.SendReply(http.Header{}, false)
			streamCh <- s
		})

		stream := <-streamCh
		io.Copy(stream, stream)

		closeChan := make(chan struct{})
		go func() {
			stream.Reset()
			conn.Close()
			close(closeChan)
		}()

		<-closeChan
	}))

	server.Start()
	defer server.Close()

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

	rt := &roundTripper{}
	client := &http.Client{Transport: rt}

	_, err = client.Do(req)
	if err != nil {
		t.Fatalf("unexpected error from client.Do: %s", err)
	}

	conn, err := NewConnection(rt.conn, false)
	if err != nil {
		t.Fatal("Error creating spdy connection:", err)
	}
	go conn.Serve(NoOpStreamHandler)

	stream, err := conn.CreateStream(http.Header{}, nil, false)
	if err != nil {
		t.Fatalf("error creating client stream: %s", err)
	}

	n, err := stream.Write([]byte("hello"))
	if err != nil {
		t.Fatalf("error writing to stream: %s", err)
	}
	if n != 5 {
		t.Fatalf("Expected to write 5 bytes, but actually wrote %d", n)
	}

	b := make([]byte, 5)
	n, err = stream.Read(b)
	if err != nil {
		t.Fatalf("error reading from stream: %s", err)
	}
	if n != 5 {
		t.Fatalf("Expected to read 5 bytes, but actually read %d", n)
	}
	if e, a := "hello", string(b[0:n]); e != a {
		t.Fatalf("expected '%s', got '%s'", e, a)
	}

	stream.Reset()
	conn.Close()
}

func TestGoAwayRace(t *testing.T) {
	var done sync.WaitGroup
	listener, err := net.Listen("tcp", "localhost:0")
	if err != nil {
		t.Fatalf("Error listening: %v", err)
	}
	listen := listener.Addr().String()

	processDataFrame := make(chan struct{})
	serverClosed := make(chan struct{})

	done.Add(1)
	go func() {
		defer done.Done()
		serverConn, err := listener.Accept()
		if err != nil {
			t.Errorf("Error accepting: %v", err)
		}

		serverSpdyConn, err := NewConnection(serverConn, true)
		if err != nil {
			t.Errorf("Error creating server connection: %v", err)
		}
		go func() {
			<-serverSpdyConn.CloseChan()
			close(serverClosed)
		}()

		// force the data frame handler to sleep before delivering the frame
		serverSpdyConn.dataFrameHandler = func(frame *spdy.DataFrame) error {
			<-processDataFrame
			return serverSpdyConn.handleDataFrame(frame)
		}

		streamCh := make(chan *Stream)
		go serverSpdyConn.Serve(func(s *Stream) {
			s.SendReply(http.Header{}, false)
			streamCh <- s
		})

		stream, ok := <-streamCh
		if !ok {
			t.Errorf("didn't get a stream")
		}
		stream.Close()
		data, err := ioutil.ReadAll(stream)
		if err != nil {
			t.Error(err)
		}
		if e, a := "hello1hello2hello3hello4hello5", string(data); e != a {
			t.Errorf("Expected %q, got %q", e, a)
		}
	}()

	dialConn, err := net.Dial("tcp", listen)
	if err != nil {
		t.Fatalf("Error dialing server: %s", err)
	}
	conn, err := NewConnection(dialConn, false)
	if err != nil {
		t.Fatalf("Error creating client connectin: %v", err)
	}
	go conn.Serve(NoOpStreamHandler)

	stream, err := conn.CreateStream(http.Header{}, nil, false)
	if err != nil {
		t.Fatalf("error creating client stream: %s", err)
	}
	if err := stream.Wait(); err != nil {
		t.Fatalf("error waiting for stream creation: %v", err)
	}

	fmt.Fprint(stream, "hello1")
	fmt.Fprint(stream, "hello2")
	fmt.Fprint(stream, "hello3")
	fmt.Fprint(stream, "hello4")
	fmt.Fprint(stream, "hello5")

	stream.Close()
	conn.Close()

	// wait for the server to get the go away frame
	<-serverClosed

	// allow the data frames to be delivered to the server's stream
	close(processDataFrame)

	done.Wait()
}

func TestSetIdleTimeoutAfterRemoteConnectionClosed(t *testing.T) {
	listener, err := net.Listen("tcp", "localhost:0")
	if err != nil {
		t.Fatalf("Error listening: %v", err)
	}
	listen := listener.Addr().String()

	serverConns := make(chan *Connection, 1)
	go func() {
		conn, connErr := listener.Accept()
		if connErr != nil {
			t.Error(connErr)
		}
		serverSpdyConn, err := NewConnection(conn, true)
		if err != nil {
			t.Errorf("Error creating server connection: %v", err)
		}
		go serverSpdyConn.Serve(NoOpStreamHandler)
		serverConns <- serverSpdyConn
	}()

	conn, dialErr := net.Dial("tcp", listen)
	if dialErr != nil {
		t.Fatalf("Error dialing server: %s", dialErr)
	}

	spdyConn, spdyErr := NewConnection(conn, false)
	if spdyErr != nil {
		t.Fatalf("Error creating spdy connection: %s", spdyErr)
	}
	go spdyConn.Serve(NoOpStreamHandler)

	if err := spdyConn.Close(); err != nil {
		t.Fatal(err)
	}

	serverConn := <-serverConns
	defer serverConn.Close()
	<-serverConn.closeChan

	serverConn.SetIdleTimeout(10 * time.Second)
}

func TestClientConnectionStopsServingAfterGoAway(t *testing.T) {
	listener, err := net.Listen("tcp", "localhost:0")
	if err != nil {
		t.Fatalf("Error listening: %v", err)
	}
	listen := listener.Addr().String()

	serverConns := make(chan *Connection, 1)
	go func() {
		conn, connErr := listener.Accept()
		if connErr != nil {
			t.Error(connErr)
		}
		serverSpdyConn, err := NewConnection(conn, true)
		if err != nil {
			t.Errorf("Error creating server connection: %v", err)
		}
		go serverSpdyConn.Serve(NoOpStreamHandler)
		serverConns <- serverSpdyConn
	}()

	conn, dialErr := net.Dial("tcp", listen)
	if dialErr != nil {
		t.Fatalf("Error dialing server: %s", dialErr)
	}

	spdyConn, spdyErr := NewConnection(conn, false)
	if spdyErr != nil {
		t.Fatalf("Error creating spdy connection: %s", spdyErr)
	}
	go spdyConn.Serve(NoOpStreamHandler)

	stream, err := spdyConn.CreateStream(http.Header{}, nil, false)
	if err != nil {
		t.Fatalf("Error creating stream: %v", err)
	}
	if err := stream.WaitTimeout(30 * time.Second); err != nil {
		t.Fatalf("Timed out waiting for stream: %v", err)
	}

	readChan := make(chan struct{})
	go func() {
		_, err := ioutil.ReadAll(stream)
		if err != nil {
			t.Errorf("Error reading stream: %v", err)
		}
		close(readChan)
	}()

	serverConn := <-serverConns
	serverConn.Close()

	// make sure the client conn breaks out of the main loop in Serve()
	<-spdyConn.closeChan
	// make sure the remote channels are closed and the stream read is unblocked
	<-readChan
}

func TestStreamReadUnblocksAfterCloseThenReset(t *testing.T) {
	listener, err := net.Listen("tcp", "localhost:0")
	if err != nil {
		t.Fatalf("Error listening: %v", err)
	}
	listen := listener.Addr().String()

	serverConns := make(chan *Connection, 1)
	go func() {
		conn, connErr := listener.Accept()
		if connErr != nil {
			t.Error(connErr)
		}
		serverSpdyConn, err := NewConnection(conn, true)
		if err != nil {
			t.Errorf("Error creating server connection: %v", err)
		}
		go serverSpdyConn.Serve(NoOpStreamHandler)
		serverConns <- serverSpdyConn
	}()

	conn, dialErr := net.Dial("tcp", listen)
	if dialErr != nil {
		t.Fatalf("Error dialing server: %s", dialErr)
	}

	spdyConn, spdyErr := NewConnection(conn, false)
	if spdyErr != nil {
		t.Fatalf("Error creating spdy connection: %s", spdyErr)
	}
	go spdyConn.Serve(NoOpStreamHandler)

	stream, err := spdyConn.CreateStream(http.Header{}, nil, false)
	if err != nil {
		t.Fatalf("Error creating stream: %v", err)
	}
	if err := stream.WaitTimeout(30 * time.Second); err != nil {
		t.Fatalf("Timed out waiting for stream: %v", err)
	}

	readChan := make(chan struct{})
	go func() {
		_, err := ioutil.ReadAll(stream)
		if err != nil {
			t.Errorf("Error reading stream: %v", err)
		}
		close(readChan)
	}()

	serverConn := <-serverConns
	defer serverConn.Close()

	if err := stream.Close(); err != nil {
		t.Fatal(err)
	}
	if err := stream.Reset(); err != nil {
		t.Fatal(err)
	}

	// make sure close followed by reset unblocks stream.Read()
	select {
	case <-readChan:
	case <-time.After(10 * time.Second):
		t.Fatal("Timed out waiting for stream read to unblock")
	}
}

var authenticated bool

func authStreamHandler(stream *Stream) {
	if !authenticated {
		stream.Refuse()
		return
	}
	MirrorStreamHandler(stream)
}

func runServer(wg *sync.WaitGroup) (io.Closer, string, error) {
	listener, listenErr := net.Listen("tcp", "localhost:0")
	if listenErr != nil {
		return nil, "", listenErr
	}
	wg.Add(1)
	go func() {
		for {
			conn, connErr := listener.Accept()
			if connErr != nil {
				break
			}

			spdyConn, _ := NewConnection(conn, true)
			go spdyConn.Serve(authStreamHandler)

		}
		wg.Done()
	}()
	return listener, listener.Addr().String(), nil
}