refacter attach API tests to use checkers

Signed-off-by: Shijiang Wei <mountkin@gmail.com>

integration-cli/docker_api_attach_test.go

@@ -2,13 +2,13 @@ package main
 
 import (
 	"bufio"
-	"bytes"
 	"io"
 	"net"
 	"net/http"
 	"strings"
 	"time"
 
+	"github.com/docker/docker/pkg/integration/checker"
 	"github.com/go-check/check"
 	"golang.org/x/net/websocket"
 )
@@ -18,23 +18,17 @@ func (s *DockerSuite) TestGetContainersAttachWebsocket(c *check.C) {
 	out, _ := dockerCmd(c, "run", "-dit", "busybox", "cat")
 
 	rwc, err := sockConn(time.Duration(10 * time.Second))
-	if err != nil {
-		c.Fatal(err)
-	}
+	c.Assert(err, checker.IsNil)
 
 	cleanedContainerID := strings.TrimSpace(out)
 	config, err := websocket.NewConfig(
 		"/containers/"+cleanedContainerID+"/attach/ws?stream=1&stdin=1&stdout=1&stderr=1",
 		"http://localhost",
 	)
-	if err != nil {
-		c.Fatal(err)
-	}
+	c.Assert(err, checker.IsNil)
 
 	ws, err := websocket.NewClient(config, rwc)
-	if err != nil {
-		c.Fatal(err)
-	}
+	c.Assert(err, checker.IsNil)
 	defer ws.Close()
 
 	expected := []byte("hello")
@@ -56,46 +50,36 @@ func (s *DockerSuite) TestGetContainersAttachWebsocket(c *check.C) {
 
 	select {
 	case err := <-inChan:
-		if err != nil {
-			c.Fatal(err)
-		}
+		c.Assert(err, checker.IsNil)
 	case <-time.After(5 * time.Second):
 		c.Fatal("Timeout writing to ws")
 	}
 
 	select {
 	case err := <-outChan:
-		if err != nil {
-			c.Fatal(err)
-		}
+		c.Assert(err, checker.IsNil)
 	case <-time.After(5 * time.Second):
 		c.Fatal("Timeout reading from ws")
 	}
 
-	if !bytes.Equal(expected, actual) {
-		c.Fatal("Expected output on websocket to match input")
-	}
+	c.Assert(actual, checker.DeepEquals, expected, check.Commentf("Websocket didn't return the expected data"))
 }
 
 // regression gh14320
 func (s *DockerSuite) TestPostContainersAttachContainerNotFound(c *check.C) {
 	status, body, err := sockRequest("POST", "/containers/doesnotexist/attach", nil)
-	c.Assert(status, check.Equals, http.StatusNotFound)
-	c.Assert(err, check.IsNil)
+	c.Assert(status, checker.Equals, http.StatusNotFound)
+	c.Assert(err, checker.IsNil)
 	expected := "no such id: doesnotexist\n"
-	if !strings.Contains(string(body), expected) {
-		c.Fatalf("Expected response body to contain %q", expected)
-	}
+	c.Assert(string(body), checker.Contains, expected)
 }
 
 func (s *DockerSuite) TestGetContainersWsAttachContainerNotFound(c *check.C) {
 	status, body, err := sockRequest("GET", "/containers/doesnotexist/attach/ws", nil)
-	c.Assert(status, check.Equals, http.StatusNotFound)
-	c.Assert(err, check.IsNil)
+	c.Assert(status, checker.Equals, http.StatusNotFound)
+	c.Assert(err, checker.IsNil)
 	expected := "no such id: doesnotexist\n"
-	if !strings.Contains(string(body), expected) {
-		c.Fatalf("Expected response body to contain %q", expected)
-	}
+	c.Assert(string(body), checker.Contains, expected)
 }
 
 func (s *DockerSuite) TestPostContainersAttach(c *check.C) {
@@ -105,7 +89,7 @@ func (s *DockerSuite) TestPostContainersAttach(c *check.C) {
 		defer conn.Close()
 		expected := []byte("success")
 		_, err := conn.Write(expected)
-		c.Assert(err, check.IsNil)
+		c.Assert(err, checker.IsNil)
 
 		conn.SetReadDeadline(time.Now().Add(time.Second))
 		lenHeader := 0
@@ -114,29 +98,29 @@ func (s *DockerSuite) TestPostContainersAttach(c *check.C) {
 		}
 		actual := make([]byte, len(expected)+lenHeader)
 		_, err = io.ReadFull(br, actual)
-		c.Assert(err, check.IsNil)
+		c.Assert(err, checker.IsNil)
 		if !tty {
 			fdMap := map[string]byte{
 				"stdin":  0,
 				"stdout": 1,
 				"stderr": 2,
 			}
-			c.Assert(actual[0], check.Equals, fdMap[stream])
+			c.Assert(actual[0], checker.Equals, fdMap[stream])
 		}
-		c.Assert(actual[lenHeader:], check.DeepEquals, expected, check.Commentf("Attach didn't return the expected data from %s", stream))
+		c.Assert(actual[lenHeader:], checker.DeepEquals, expected, check.Commentf("Attach didn't return the expected data from %s", stream))
 	}
 
 	expectTimeout := func(conn net.Conn, br *bufio.Reader, stream string) {
 		defer conn.Close()
 		_, err := conn.Write([]byte{'t'})
-		c.Assert(err, check.IsNil)
+		c.Assert(err, checker.IsNil)
 
 		conn.SetReadDeadline(time.Now().Add(time.Second))
 		actual := make([]byte, 1)
 		_, err = io.ReadFull(br, actual)
 		opErr, ok := err.(*net.OpError)
-		c.Assert(ok, check.Equals, true, check.Commentf("Error is expected to be *net.OpError, got %v", err))
-		c.Assert(opErr.Timeout(), check.Equals, true, check.Commentf("Read from %s is expected to timeout", stream))
+		c.Assert(ok, checker.Equals, true, check.Commentf("Error is expected to be *net.OpError, got %v", err))
+		c.Assert(opErr.Timeout(), checker.Equals, true, check.Commentf("Read from %s is expected to timeout", stream))
 	}
 
 	// Create a container that only emits stdout.
@@ -144,12 +128,12 @@ func (s *DockerSuite) TestPostContainersAttach(c *check.C) {
 	cid = strings.TrimSpace(cid)
 	// Attach to the container's stdout stream.
 	conn, br, err := sockRequestHijack("POST", "/containers/"+cid+"/attach?stream=1&stdin=1&stdout=1", nil, "text/plain")
-	c.Assert(err, check.IsNil)
+	c.Assert(err, checker.IsNil)
 	// Check if the data from stdout can be received.
 	expectSuccess(conn, br, "stdout", false)
 	// Attach to the container's stderr stream.
 	conn, br, err = sockRequestHijack("POST", "/containers/"+cid+"/attach?stream=1&stdin=1&stderr=1", nil, "text/plain")
-	c.Assert(err, check.IsNil)
+	c.Assert(err, checker.IsNil)
 	// Since the container only emits stdout, attaching to stderr should return nothing.
 	expectTimeout(conn, br, "stdout")
 
@@ -157,10 +141,10 @@ func (s *DockerSuite) TestPostContainersAttach(c *check.C) {
 	cid, _ = dockerCmd(c, "run", "-di", "busybox", "/bin/sh", "-c", "cat >&2")
 	cid = strings.TrimSpace(cid)
 	conn, br, err = sockRequestHijack("POST", "/containers/"+cid+"/attach?stream=1&stdin=1&stderr=1", nil, "text/plain")
-	c.Assert(err, check.IsNil)
+	c.Assert(err, checker.IsNil)
 	expectSuccess(conn, br, "stderr", false)
 	conn, br, err = sockRequestHijack("POST", "/containers/"+cid+"/attach?stream=1&stdin=1&stdout=1", nil, "text/plain")
-	c.Assert(err, check.IsNil)
+	c.Assert(err, checker.IsNil)
 	expectTimeout(conn, br, "stderr")
 
 	// Test with tty.
@@ -168,12 +152,12 @@ func (s *DockerSuite) TestPostContainersAttach(c *check.C) {
 	cid = strings.TrimSpace(cid)
 	// Attach to stdout only.
 	conn, br, err = sockRequestHijack("POST", "/containers/"+cid+"/attach?stream=1&stdin=1&stdout=1", nil, "text/plain")
-	c.Assert(err, check.IsNil)
+	c.Assert(err, checker.IsNil)
 	expectSuccess(conn, br, "stdout", true)
 
 	// Attach without stdout stream.
 	conn, br, err = sockRequestHijack("POST", "/containers/"+cid+"/attach?stream=1&stdin=1&stderr=1", nil, "text/plain")
-	c.Assert(err, check.IsNil)
+	c.Assert(err, checker.IsNil)
 	// Nothing should be received because both the stdout and stderr of the container will be
 	// sent to the client as stdout when tty is enabled.
 	expectTimeout(conn, br, "stdout")