From 69ff675fa5b55466a0a7ad8af391cec679b21216 Mon Sep 17 00:00:00 2001
From: Anmol Sethi <hi@nhooyr.io>
Date: Sun, 9 Feb 2020 01:27:32 -0500
Subject: [PATCH] More tests and fixes

---
 close_notjs.go    |  21 ++--
 compress_notjs.go |  11 --
 conn_notjs.go     |  22 ++--
 conn_test.go      | 141 +++++++++++++++++++++++--
 dial_test.go      |  18 +++-
 go.mod            |   8 --
 go.sum            | 255 ----------------------------------------------
 write.go          |   6 ++
 ws_js_test.go     |   2 +-
 9 files changed, 170 insertions(+), 314 deletions(-)

diff --git a/close_notjs.go b/close_notjs.go
index dd1b0e0..08a1ea0 100644
--- a/close_notjs.go
+++ b/close_notjs.go
@@ -35,7 +35,7 @@ func (c *Conn) closeHandshake(code StatusCode, reason string) (err error) {
 	defer errd.Wrap(&err, "failed to close WebSocket")
 
 	err = c.writeClose(code, reason)
-	if err != nil {
+	if CloseStatus(err) == -1 {
 		return err
 	}
 
@@ -46,12 +46,6 @@ func (c *Conn) closeHandshake(code StatusCode, reason string) (err error) {
 	return nil
 }
 
-func (c *Conn) writeError(code StatusCode, err error) {
-	c.setCloseErr(err)
-	c.writeClose(code, err.Error())
-	c.close(nil)
-}
-
 func (c *Conn) writeClose(code StatusCode, reason string) error {
 	c.closeMu.Lock()
 	closing := c.wroteClose
@@ -70,7 +64,12 @@ func (c *Conn) writeClose(code StatusCode, reason string) error {
 
 	var p []byte
 	if ce.Code != StatusNoStatusRcvd {
-		p = ce.bytes()
+		var err error
+		p, err = ce.bytes()
+		if err != nil {
+			log.Printf("websocket: %v", err)
+			return err
+		}
 	}
 
 	return c.writeControl(context.Background(), opClose, p)
@@ -148,16 +147,16 @@ func validWireCloseCode(code StatusCode) bool {
 	return false
 }
 
-func (ce CloseError) bytes() []byte {
+func (ce CloseError) bytes() ([]byte, error) {
 	p, err := ce.bytesErr()
 	if err != nil {
-		log.Printf("websocket: failed to marshal close frame: %v", err)
+		err = xerrors.Errorf("failed to marshal close frame: %w", err)
 		ce = CloseError{
 			Code: StatusInternalError,
 		}
 		p, _ = ce.bytesErr()
 	}
-	return p
+	return p, err
 }
 
 const maxCloseReason = maxControlPayload - 2
diff --git a/compress_notjs.go b/compress_notjs.go
index 8bc2f87..6ab6e28 100644
--- a/compress_notjs.go
+++ b/compress_notjs.go
@@ -10,9 +10,6 @@ import (
 )
 
 func (m CompressionMode) opts() *compressionOptions {
-	if m == CompressionDisabled {
-		return nil
-	}
 	return &compressionOptions{
 		clientNoContextTakeover: m == CompressionNoContextTakeover,
 		serverNoContextTakeover: m == CompressionNoContextTakeover,
@@ -42,14 +39,6 @@ func (copts *compressionOptions) setHeader(h http.Header) {
 // trying to return more bytes.
 const deflateMessageTail = "\x00\x00\xff\xff"
 
-func (c *Conn) writeNoContextTakeOver() bool {
-	return c.client && c.copts.clientNoContextTakeover || !c.client && c.copts.serverNoContextTakeover
-}
-
-func (c *Conn) readNoContextTakeOver() bool {
-	return !c.client && c.copts.clientNoContextTakeover || c.client && c.copts.serverNoContextTakeover
-}
-
 type trimLastFourBytesWriter struct {
 	w    io.Writer
 	tail []byte
diff --git a/conn_notjs.go b/conn_notjs.go
index d2fea4d..96d17b7 100644
--- a/conn_notjs.go
+++ b/conn_notjs.go
@@ -87,12 +87,6 @@ func newConn(cfg connConfig) *Conn {
 		closed:      make(chan struct{}),
 		activePings: make(map[string]chan<- struct{}),
 	}
-	if c.flate() && c.flateThreshold == 0 {
-		c.flateThreshold = 256
-		if c.writeNoContextTakeOver() {
-			c.flateThreshold = 512
-		}
-	}
 
 	c.readMu = newMu(c)
 	c.writeFrameMu = newMu(c)
@@ -104,6 +98,13 @@ func newConn(cfg connConfig) *Conn {
 		c.writeBuf = extractBufioWriterBuf(c.bw, c.rwc)
 	}
 
+	if c.flate() && c.flateThreshold == 0 {
+		c.flateThreshold = 256
+		if !c.msgWriter.flateContextTakeover() {
+			c.flateThreshold = 512
+		}
+	}
+
 	runtime.SetFinalizer(c, func(c *Conn) {
 		c.close(xerrors.New("connection garbage collected"))
 	})
@@ -247,15 +248,6 @@ func (m *mu) Lock(ctx context.Context) error {
 	}
 }
 
-func (m *mu) TryLock() bool {
-	select {
-	case m.ch <- struct{}{}:
-		return true
-	default:
-		return false
-	}
-}
-
 func (m *mu) Unlock() {
 	select {
 	case <-m.ch:
diff --git a/conn_test.go b/conn_test.go
index 5c817a2..098fc09 100644
--- a/conn_test.go
+++ b/conn_test.go
@@ -16,6 +16,7 @@ import (
 	"golang.org/x/xerrors"
 
 	"nhooyr.io/websocket"
+	"nhooyr.io/websocket/internal/test/cmp"
 	"nhooyr.io/websocket/internal/test/wstest"
 	"nhooyr.io/websocket/internal/test/xrand"
 	"nhooyr.io/websocket/internal/xsync"
@@ -31,9 +32,6 @@ func TestConn(t *testing.T) {
 			t.Run("", func(t *testing.T) {
 				t.Parallel()
 
-				ctx, cancel := context.WithTimeout(context.Background(), time.Second*10)
-				defer cancel()
-
 				copts := &websocket.CompressionOptions{
 					Mode:      websocket.CompressionMode(xrand.Int(int(websocket.CompressionDisabled) + 1)),
 					Threshold: xrand.Int(9999),
@@ -47,11 +45,14 @@ func TestConn(t *testing.T) {
 				if err != nil {
 					t.Fatal(err)
 				}
-				defer c1.Close(websocket.StatusInternalError, "")
 				defer c2.Close(websocket.StatusInternalError, "")
+				defer c1.Close(websocket.StatusInternalError, "")
+
+				ctx, cancel := context.WithTimeout(context.Background(), time.Second*10)
+				defer cancel()
 
 				echoLoopErr := xsync.Go(func() error {
-					err := wstest.EchoLoop(ctx, c1)
+					err := wstest.EchoLoop(ctx, c2)
 					return assertCloseStatus(websocket.StatusNormalClosure, err)
 				})
 				defer func() {
@@ -62,19 +63,143 @@ func TestConn(t *testing.T) {
 				}()
 				defer cancel()
 
-				c2.SetReadLimit(131072)
+				c1.SetReadLimit(131072)
 
 				for i := 0; i < 5; i++ {
-					err := wstest.Echo(ctx, c2, 131072)
+					err := wstest.Echo(ctx, c1, 131072)
 					if err != nil {
 						t.Fatal(err)
 					}
 				}
 
-				c2.Close(websocket.StatusNormalClosure, "")
+				err = c1.Close(websocket.StatusNormalClosure, "")
+				if err != nil {
+					t.Fatalf("unexpected error: %v", err)
+				}
 			})
 		}
 	})
+
+	t.Run("badClose", func(t *testing.T) {
+		t.Parallel()
+
+		c1, c2, err := wstest.Pipe(nil, nil)
+		if err != nil {
+			t.Fatal(err)
+		}
+		defer c1.Close(websocket.StatusInternalError, "")
+		defer c2.Close(websocket.StatusInternalError, "")
+
+		err = c1.Close(-1, "")
+		if !cmp.ErrorContains(err, "failed to marshal close frame: status code StatusCode(-1) cannot be set") {
+			t.Fatalf("unexpected error: %v", err)
+		}
+	})
+
+	t.Run("ping", func(t *testing.T) {
+		t.Parallel()
+
+		c1, c2, err := wstest.Pipe(nil, nil)
+		if err != nil {
+			t.Fatal(err)
+		}
+		defer c1.Close(websocket.StatusInternalError, "")
+		defer c2.Close(websocket.StatusInternalError, "")
+
+		ctx, cancel := context.WithTimeout(context.Background(), time.Second*15)
+		defer cancel()
+
+		c2.CloseRead(ctx)
+		c1.CloseRead(ctx)
+
+		for i := 0; i < 10; i++ {
+			err = c1.Ping(ctx)
+			if err != nil {
+				t.Fatal(err)
+			}
+		}
+
+		err = c1.Close(websocket.StatusNormalClosure, "")
+		if err != nil {
+			t.Fatalf("unexpected error: %v", err)
+		}
+	})
+
+	t.Run("badPing", func(t *testing.T) {
+		t.Parallel()
+
+		c1, c2, err := wstest.Pipe(nil, nil)
+		if err != nil {
+			t.Fatal(err)
+		}
+		defer c1.Close(websocket.StatusInternalError, "")
+		defer c2.Close(websocket.StatusInternalError, "")
+
+		ctx, cancel := context.WithTimeout(context.Background(), time.Second*5)
+		defer cancel()
+
+		c2.CloseRead(ctx)
+
+		err = c1.Ping(ctx)
+		if !cmp.ErrorContains(err, "failed to wait for pong") {
+			t.Fatalf("unexpected error: %v", err)
+		}
+	})
+
+	t.Run("concurrentWrite", func(t *testing.T) {
+		t.Parallel()
+
+		c1, c2, err := wstest.Pipe(nil, nil)
+		if err != nil {
+			t.Fatal(err)
+		}
+		defer c2.Close(websocket.StatusInternalError, "")
+		defer c1.Close(websocket.StatusInternalError, "")
+
+		ctx, cancel := context.WithTimeout(context.Background(), time.Second*10)
+		defer cancel()
+
+		discardLoopErr := xsync.Go(func() error {
+			for {
+				_, _, err := c2.Read(ctx)
+				if websocket.CloseStatus(err) == websocket.StatusNormalClosure {
+					return nil
+				}
+				if err != nil {
+					return err
+				}
+			}
+		})
+		defer func() {
+			err := <-discardLoopErr
+			if err != nil {
+				t.Errorf("discard loop error: %v", err)
+			}
+		}()
+		defer cancel()
+
+		msg := xrand.Bytes(xrand.Int(9999))
+		const count = 100
+		errs := make(chan error, count)
+
+		for i := 0; i < count; i++ {
+			go func() {
+				errs <- c1.Write(ctx, websocket.MessageBinary, msg)
+			}()
+		}
+
+		for i := 0; i < count; i++ {
+			err := <-errs
+			if err != nil {
+				t.Fatal(err)
+			}
+		}
+
+		err = c1.Close(websocket.StatusNormalClosure, "")
+		if err != nil {
+			t.Fatalf("unexpected error: %v", err)
+		}
+	})
 }
 
 func TestWasm(t *testing.T) {
diff --git a/dial_test.go b/dial_test.go
index e38e8f1..c465741 100644
--- a/dial_test.go
+++ b/dial_test.go
@@ -13,7 +13,7 @@ import (
 	"testing"
 	"time"
 
-	"cdr.dev/slog/sloggers/slogtest/assert"
+	"nhooyr.io/websocket/internal/test/cmp"
 )
 
 func TestBadDials(t *testing.T) {
@@ -70,7 +70,9 @@ func TestBadDials(t *testing.T) {
 				}
 
 				_, _, err := dial(ctx, tc.url, tc.opts, tc.rand)
-				assert.Error(t, "dial", err)
+				if err == nil {
+					t.Fatalf("expected error")
+				}
 			})
 		}
 	})
@@ -88,7 +90,9 @@ func TestBadDials(t *testing.T) {
 				}, nil
 			}),
 		})
-		assert.ErrorContains(t, "dial", err, "failed to WebSocket dial: expected handshake response status code 101 but got 0")
+		if !cmp.ErrorContains(err, "failed to WebSocket dial: expected handshake response status code 101 but got 0") {
+			t.Fatal(err)
+		}
 	})
 
 	t.Run("badBody", func(t *testing.T) {
@@ -113,7 +117,9 @@ func TestBadDials(t *testing.T) {
 		_, _, err := Dial(ctx, "ws://example.com", &DialOptions{
 			HTTPClient: mockHTTPClient(rt),
 		})
-		assert.ErrorContains(t, "dial", err, "response body is not a io.ReadWriteCloser")
+		if !cmp.ErrorContains(err, "response body is not a io.ReadWriteCloser") {
+			t.Fatal(err)
+		}
 	})
 }
 
@@ -211,7 +217,9 @@ func Test_verifyServerHandshake(t *testing.T) {
 
 			r := httptest.NewRequest("GET", "/", nil)
 			key, err := secWebSocketKey(rand.Reader)
-			assert.Success(t, "secWebSocketKey", err)
+			if err != nil {
+				t.Fatal(err)
+			}
 			r.Header.Set("Sec-WebSocket-Key", key)
 
 			if resp.Header.Get("Sec-WebSocket-Accept") == "" {
diff --git a/go.mod b/go.mod
index fc4ebb9..cb37239 100644
--- a/go.mod
+++ b/go.mod
@@ -3,20 +3,12 @@ module nhooyr.io/websocket
 go 1.12
 
 require (
-	cdr.dev/slog v1.3.0
-	github.com/alecthomas/chroma v0.7.1 // indirect
-	github.com/fatih/color v1.9.0 // indirect
 	github.com/gobwas/httphead v0.0.0-20180130184737-2c6c146eadee // indirect
 	github.com/gobwas/pool v0.2.0 // indirect
 	github.com/gobwas/ws v1.0.2
-	github.com/golang/groupcache v0.0.0-20200121045136-8c9f03a8e57e // indirect
 	github.com/golang/protobuf v1.3.3
 	github.com/google/go-cmp v0.4.0
 	github.com/gorilla/websocket v1.4.1
-	github.com/mattn/go-isatty v0.0.12 // indirect
-	go.opencensus.io v0.22.3 // indirect
-	golang.org/x/crypto v0.0.0-20200208060501-ecb85df21340 // indirect
-	golang.org/x/sys v0.0.0-20200202164722-d101bd2416d5 // indirect
 	golang.org/x/time v0.0.0-20191024005414-555d28b269f0
 	golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543
 )
diff --git a/go.sum b/go.sum
index 1d1dc3a..8cbc66c 100644
--- a/go.sum
+++ b/go.sum
@@ -1,271 +1,16 @@
-cdr.dev/slog v1.3.0 h1:MYN1BChIaVEGxdS7I5cpdyMC0+WfJfK8BETAfzfLUGQ=
-cdr.dev/slog v1.3.0/go.mod h1:C5OL99WyuOK8YHZdYY57dAPN1jK2WJlCdq2VP6xeQns=
-cloud.google.com/go v0.26.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-cloud.google.com/go v0.34.0/go.mod h1:aQUYkXzVsufM+DwF1aE+0xfcU+56JwCaLick0ClmMTw=
-cloud.google.com/go v0.38.0/go.mod h1:990N+gfupTy94rShfmMCWGDn0LpTmnzTp2qbd1dvSRU=
-cloud.google.com/go v0.44.1/go.mod h1:iSa0KzasP4Uvy3f1mN/7PiObzGgflwredwwASm/v6AU=
-cloud.google.com/go v0.44.2/go.mod h1:60680Gw3Yr4ikxnPRS/oxxkBccT6SA1yMk63TGekxKY=
-cloud.google.com/go v0.45.1/go.mod h1:RpBamKRgapWJb87xiFSdk4g1CME7QZg3uwTez+TSTjc=
-cloud.google.com/go v0.46.3/go.mod h1:a6bKKbmY7er1mI7TEI4lsAkts/mkhTSZK8w33B4RAg0=
-cloud.google.com/go v0.49.0 h1:CH+lkubJzcPYB1Ggupcq0+k8Ni2ILdG2lYjDIgavDBQ=
-cloud.google.com/go v0.49.0/go.mod h1:hGvAdzcWNbyuxS3nWhD7H2cIJxjRRTRLQVB0bdputVY=
-cloud.google.com/go/bigquery v1.0.1/go.mod h1:i/xbL2UlR5RvWAURpBYZTtm/cXjCha9lbfbpx4poX+o=
-cloud.google.com/go/datastore v1.0.0/go.mod h1:LXYbyblFSglQ5pkeyhO+Qmw7ukd3C+pD7TKLgZqpHYE=
-cloud.google.com/go/pubsub v1.0.1/go.mod h1:R0Gpsv3s54REJCy4fxDixWD93lHJMoZTyQ2kNxGRt3I=
-cloud.google.com/go/storage v1.0.0/go.mod h1:IhtSnM/ZTZV8YYJWCY8RULGVqBDmpoyjwiyrjsg+URw=
-dmitri.shuralyov.com/gpu/mtl v0.0.0-20190408044501-666a987793e9/go.mod h1:H6x//7gZCb22OMCxBHrMx7a5I7Hp++hsVxbQ4BYO7hU=
-github.com/BurntSushi/toml v0.3.1/go.mod h1:xHWCNGjB5oqiDr8zfno3MHue2Ht5sIBksp03qcyfWMU=
-github.com/BurntSushi/xgb v0.0.0-20160522181843-27f122750802/go.mod h1:IVnqGOEym/WlBOVXweHU+Q+/VP0lqqI8lqeDx9IjBqo=
-github.com/GeertJohan/go.incremental v1.0.0/go.mod h1:6fAjUhbVuX1KcMD3c8TEgVUqmo4seqhv0i0kdATSkM0=
-github.com/GeertJohan/go.rice v1.0.0/go.mod h1:eH6gbSOAUv07dQuZVnBmoDP8mgsM1rtixis4Tib9if0=
-github.com/akavel/rsrc v0.8.0/go.mod h1:uLoCtb9J+EyAqh+26kdrTgmzRBFPGOolLWKpdxkKq+c=
-github.com/alecthomas/assert v0.0.0-20170929043011-405dbfeb8e38 h1:smF2tmSOzy2Mm+0dGI2AIUHY+w0BUc+4tn40djz7+6U=
-github.com/alecthomas/assert v0.0.0-20170929043011-405dbfeb8e38/go.mod h1:r7bzyVFMNntcxPZXK3/+KdruV1H5KSlyVY0gc+NgInI=
-github.com/alecthomas/chroma v0.7.0 h1:z+0HgTUmkpRDRz0SRSdMaqOLfJV4F+N1FPDZUZIDUzw=
-github.com/alecthomas/chroma v0.7.0/go.mod h1:1U/PfCsTALWWYHDnsIQkxEBM0+6LLe0v8+RSVMOwxeY=
-github.com/alecthomas/chroma v0.7.1 h1:G1i02OhUbRi2nJxcNkwJaY/J1gHXj9tt72qN6ZouLFQ=
-github.com/alecthomas/chroma v0.7.1/go.mod h1:gHw09mkX1Qp80JlYbmN9L3+4R5o6DJJ3GRShh+AICNc=
-github.com/alecthomas/colour v0.0.0-20160524082231-60882d9e2721 h1:JHZL0hZKJ1VENNfmXvHbgYlbUOvpzYzvy2aZU5gXVeo=
-github.com/alecthomas/colour v0.0.0-20160524082231-60882d9e2721/go.mod h1:QO9JBoKquHd+jz9nshCh40fOfO+JzsoXy8qTHF68zU0=
-github.com/alecthomas/kong v0.1.17-0.20190424132513-439c674f7ae0/go.mod h1:+inYUSluD+p4L8KdviBSgzcqEjUQOfC5fQDRFuc36lI=
-github.com/alecthomas/kong v0.2.1-0.20190708041108-0548c6b1afae/go.mod h1:+inYUSluD+p4L8KdviBSgzcqEjUQOfC5fQDRFuc36lI=
-github.com/alecthomas/kong-hcl v0.1.8-0.20190615233001-b21fea9723c8/go.mod h1:MRgZdU3vrFd05IQ89AxUZ0aYdF39BYoNFa324SodPCA=
-github.com/alecthomas/repr v0.0.0-20180818092828-117648cd9897 h1:p9Sln00KOTlrYkxI1zYWl1QLnEqAqEARBEYa8FQnQcY=
-github.com/alecthomas/repr v0.0.0-20180818092828-117648cd9897/go.mod h1:xTS7Pm1pD1mvyM075QCDSRqH6qRLXylzS24ZTpRiSzQ=
-github.com/census-instrumentation/opencensus-proto v0.2.1/go.mod h1:f6KPmirojxKA12rnyqOA5BBL4O983OfeGPqjHWSTneU=
-github.com/client9/misspell v0.3.4/go.mod h1:qj6jICC3Q7zFZvVWo7KLAzC3yx5G7kyvSDkc90ppPyw=
-github.com/daaku/go.zipexe v1.0.0/go.mod h1:z8IiR6TsVLEYKwXAoE/I+8ys/sDkgTzSL0CLnGVd57E=
-github.com/danwakefield/fnmatch v0.0.0-20160403171240-cbb64ac3d964 h1:y5HC9v93H5EPKqaS1UYVg1uYah5Xf51mBfIoWehClUQ=
-github.com/danwakefield/fnmatch v0.0.0-20160403171240-cbb64ac3d964/go.mod h1:Xd9hchkHSWYkEqJwUGisez3G1QY8Ryz0sdWrLPMGjLk=
-github.com/davecgh/go-spew v1.1.0/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/davecgh/go-spew v1.1.1 h1:vj9j/u1bqnvCEfJOwUhtlOARqs3+rkHYY13jYWTU97c=
-github.com/davecgh/go-spew v1.1.1/go.mod h1:J7Y8YcW2NihsgmVo/mv3lAwl/skON4iLHjSsI+c5H38=
-github.com/dlclark/regexp2 v1.1.6 h1:CqB4MjHw0MFCDj+PHHjiESmHX+N7t0tJzKvC6M97BRg=
-github.com/dlclark/regexp2 v1.1.6/go.mod h1:2pZnwuY/m+8K6iRw6wQdMtk+rH5tNGR1i55kozfMjCc=
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 golang.org/x/time v0.0.0-20191024005414-555d28b269f0 h1:/5xXl8Y5W96D+TtHSlonuFqGHIWVuyCkGJLwGh9JJFs=
 golang.org/x/time v0.0.0-20191024005414-555d28b269f0/go.mod h1:tRJNPiyCQ0inRvYxbN9jk5I+vvW/OXSQhTDSoE431IQ=
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 golang.org/x/xerrors v0.0.0-20191204190536-9bdfabe68543/go.mod h1:I/5z698sn9Ka8TeJc9MKroUUfqBBauWjQqLJ2OPfmY0=
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diff --git a/write.go b/write.go
index 70656b9..612e52c 100644
--- a/write.go
+++ b/write.go
@@ -335,3 +335,9 @@ func extractBufioWriterBuf(bw *bufio.Writer, w io.Writer) []byte {
 
 	return writeBuf
 }
+
+func (c *Conn) writeError(code StatusCode, err error) {
+	c.setCloseErr(err)
+	c.writeClose(code, err.Error())
+	c.close(nil)
+}
diff --git a/ws_js_test.go b/ws_js_test.go
index 8d49af6..bda9c0a 100644
--- a/ws_js_test.go
+++ b/ws_js_test.go
@@ -15,7 +15,7 @@ import (
 func TestWasm(t *testing.T) {
 	t.Parallel()
 
-	ctx, cancel := context.WithTimeout(context.Background(), time.Second*10)
+	ctx, cancel := context.WithTimeout(context.Background(), time.Second*20)
 	defer cancel()
 
 	c, resp, err := websocket.Dial(ctx, os.Getenv("WS_ECHO_SERVER_URL"), &websocket.DialOptions{
-- 
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