Port POST container attach tests

Signed-off-by: Megan Kostick <mkostick@us.ibm.com>

integration-cli/docker_api_attach_test.go

@@ -2,7 +2,9 @@ package main
 
 import (
 	"bytes"
+	"io"
 	"net/http"
+	"net/http/httputil"
 	"os/exec"
 	"strings"
 	"time"
@@ -98,3 +100,133 @@ func (s *DockerSuite) TestGetContainersWsAttachContainerNotFound(c *check.C) {
 		c.Fatalf("Expected response body to contain %q", expected)
 	}
 }
+
+func (s *DockerSuite) TestPostContainersAttach(c *check.C) {
+	runCmd := exec.Command(dockerBinary, "run", "-dit", "busybox", "cat")
+	out, _, err := runCommandWithOutput(runCmd)
+	c.Assert(err, check.IsNil)
+
+	r, w := io.Pipe()
+	defer r.Close()
+	defer w.Close()
+
+	conn, err := sockConn(time.Duration(10 * time.Second))
+	c.Assert(err, check.IsNil)
+
+	containerID := strings.TrimSpace(out)
+
+	req, err := http.NewRequest("POST", "/containers/"+containerID+"/attach?stream=1&stdin=1&stdout=1&stderr=1", bytes.NewReader([]byte{}))
+	c.Assert(err, check.IsNil)
+
+	client := httputil.NewClientConn(conn, nil)
+	defer client.Close()
+
+	// Do POST attach request
+	resp, err := client.Do(req)
+	c.Assert(resp.StatusCode, check.Equals, http.StatusOK)
+	// If we check the err, we get a ErrPersistEOF = &http.ProtocolError{ErrorString: "persistent connection closed"}
+	// This means that the remote requested this be the last request serviced, is this okay?
+
+	// Test read and write to the attached container
+	expected := []byte("hello")
+	actual := make([]byte, len(expected))
+
+	outChan := make(chan error)
+	go func() {
+		_, err := r.Read(actual)
+		outChan <- err
+		close(outChan)
+	}()
+
+	inChan := make(chan error)
+	go func() {
+		_, err := w.Write(expected)
+		inChan <- err
+		close(inChan)
+	}()
+
+	select {
+	case err := <-inChan:
+		c.Assert(err, check.IsNil)
+	case <-time.After(5 * time.Second):
+		c.Fatal("Timeout writing to stdout")
+	}
+
+	select {
+	case err := <-outChan:
+		c.Assert(err, check.IsNil)
+	case <-time.After(5 * time.Second):
+		c.Fatal("Timeout reading from stdin")
+	}
+
+	if !bytes.Equal(expected, actual) {
+		c.Fatal("Expected output to match input")
+	}
+
+	resp.Body.Close()
+}
+
+func (s *DockerSuite) TestPostContainersAttachStderr(c *check.C) {
+	runCmd := exec.Command(dockerBinary, "run", "-dit", "busybox", "/bin/sh", "-c", "cat >&2")
+	out, _, err := runCommandWithOutput(runCmd)
+	c.Assert(err, check.IsNil)
+
+	r, w := io.Pipe()
+	defer r.Close()
+	defer w.Close()
+
+	conn, err := sockConn(time.Duration(10 * time.Second))
+	c.Assert(err, check.IsNil)
+
+	containerID := strings.TrimSpace(out)
+
+	req, err := http.NewRequest("POST", "/containers/"+containerID+"/attach?stream=1&stdin=1&stdout=1&stderr=1", bytes.NewReader([]byte{}))
+	c.Assert(err, check.IsNil)
+
+	client := httputil.NewClientConn(conn, nil)
+	defer client.Close()
+
+	// Do POST attach request
+	resp, err := client.Do(req)
+	c.Assert(resp.StatusCode, check.Equals, http.StatusOK)
+	// If we check the err, we get a ErrPersistEOF = &http.ProtocolError{ErrorString: "persistent connection closed"}
+	// This means that the remote requested this be the last request serviced, is this okay?
+
+	// Test read and write to the attached container
+	expected := []byte("hello")
+	actual := make([]byte, len(expected))
+
+	outChan := make(chan error)
+	go func() {
+		_, err := r.Read(actual)
+		outChan <- err
+		close(outChan)
+	}()
+
+	inChan := make(chan error)
+	go func() {
+		_, err := w.Write(expected)
+		inChan <- err
+		close(inChan)
+	}()
+
+	select {
+	case err := <-inChan:
+		c.Assert(err, check.IsNil)
+	case <-time.After(5 * time.Second):
+		c.Fatal("Timeout writing to stdout")
+	}
+
+	select {
+	case err := <-outChan:
+		c.Assert(err, check.IsNil)
+	case <-time.After(5 * time.Second):
+		c.Fatal("Timeout reading from stdin")
+	}
+
+	if !bytes.Equal(expected, actual) {
+		c.Fatal("Expected output to match input")
+	}
+
+	resp.Body.Close()
+}