You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: remotecommand_test.go
    path of file: ./repos/kubernetes/pkg/client/tests
    
    the code of the file until where you have to start completion: /*
Copyright 2015 The Kubernetes Authors.

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 tests

import (
	"bytes"
	"context"
	"errors"
	"fmt"
	"io"
	"io/ioutil"
	"net/http"
	"net/http/httptest"
	"net/url"
	"strings"
	"testing"
	"time"

	"github.com/stretchr/testify/require"

	"k8s.io/apimachinery/pkg/runtime"
	"k8s.io/apimachinery/pkg/runtime/schema"
	"k8s.io/apimachinery/pkg/types"
	"k8s.io/apimachinery/pkg/util/httpstream"
	remotecommandconsts "k8s.io/apimachinery/pkg/util/remotecommand"
	restclient "k8s.io/client-go/rest"
	remoteclient "k8s.io/client-go/tools/remotecommand"
	"k8s.io/client-go/transport/spdy"
	"k8s.io/kubelet/pkg/cri/streaming/remotecommand"
	"k8s.io/kubernetes/pkg/api/legacyscheme"
	api "k8s.io/kubernetes/pkg/apis/core"
)

type fakeExecutor stru
    
func TestStream(t *testing.T) {
	testCases := []struct {
		TestName        string
		Stdin           string
		Stdout          string
		Stderr          string
		Error           string
		Tty             bool
		MessageCount    int
		ClientProtocols []string
		ServerProtocols []string
	}{
		{
			TestName:        "error",
			Error:           "bail",
			Stdout:          "a",
			ClientProtocols: []string{remotecommandconsts.StreamProtocolV2Name},
			ServerProtocols: []string{remotecommandconsts.StreamProtocolV2Name},
		},
		{
			TestName:        "in/out/err",
			Stdin:           "a",
			Stdout:          "b",
			Stderr:          "c",
			MessageCount:    100,
			ClientProtocols: []string{remotecommandconsts.StreamProtocolV2Name},
			ServerProtocols: []string{remotecommandconsts.StreamProtocolV2Name},
		},
		{
			TestName:        "oversized stdin",
			Stdin:           strings.Repeat("a", 20*1024*1024),
			Stdout:          "b",
			Stderr:          "",
			MessageCount:    1,
			ClientProtocols: []string{remotecommandconsts.StreamProtocolV2Name},
			ServerProtocols: []string{remotecommandconsts.StreamProtocolV2Name},
		},
		{
			TestName:        "in/out/tty",
			Stdin:           "a",
			Stdout:          "b",
			Tty:             true,
			MessageCount:    100,
			ClientProtocols: []string{remotecommandconsts.StreamProtocolV2Name},
			ServerProtocols: []string{remotecommandconsts.StreamProtocolV2Name},
		},
	}

	for _, testCase := range testCases {
		for _, exec := range []bool{true, false} {
			var name string
			if exec {
				name = testCase.TestName + " (exec)"
			} else {
				name = testCase.TestName + " (attach)"
			}

			t.Run(name, func(t *testing.T) {
				var (
					streamIn             io.Reader
					streamOut, streamErr io.Writer
				)
				localOut := &bytes.Buffer{}
				localErr := &bytes.Buffer{}

				requestReceived := make(chan struct{})
				server := httptest.NewServer(fakeServer(t, requestReceived, name, exec, testCase.Stdin, testCase.Stdout, testCase.Stderr, testCase.Error, testCase.Tty, testCase.MessageCount, testCase.ServerProtocols))
				defer server.Close()

				url, _ := url.ParseRequestURI(server.URL)
				config := restclient.ClientContentConfig{
					GroupVersion: schema.GroupVersion{Group: "x"},
					Negotiator:   runtime.NewClientNegotiator(legacyscheme.Codecs.WithoutConversion(), schema.GroupVersion{Group: "x"}),
				}
				c, err := restclient.NewRESTClient(url, "", config, nil, nil)
				if err != nil {
					t.Fatalf("failed to create a client: %v", err)
				}
				req := c.Post().Resource("testing")

				if exec {
					req.Param("command", "ls")
					req.Param("command", "/")
				}

				if len(testCase.Stdin) > 0 {
					req.Param(api.ExecStdinParam, "1")
					streamIn = strings.NewReader(strings.Repeat(testCase.Stdin, testCase.MessageCount))
				}

				if len(testCase.Stdout) > 0 {
					req.Param(api.ExecStdoutParam, "1")
					streamOut = localOut
				}

				if testCase.Tty {
					req.Param(api.ExecTTYParam, "1")
				} else if len(testCase.Stderr) > 0 {
					req.Param(api.ExecStderrParam, "1")
					streamErr = localErr
				}

				conf := &restclient.Config{
					Host: server.URL,
				}
				transport, upgradeTransport, err := spdy.RoundTripperFor(conf)
				if err != nil {
					t.Fatalf("%s: unexpected error: %v", name, err)
				}
				e, err := remoteclient.NewSPDYExecutorForProtocols(transport, upgradeTransport, "POST", req.URL(), testCase.ClientProtocols...)
				if err != nil {
					t.Fatalf("%s: unexpected error: %v", name, err)
				}
				err = e.StreamWithContext(context.Background(), remoteclient.StreamOptions{
					Stdin:  streamIn,
					Stdout: streamOut,
					Stderr: streamErr,
					Tty:    testCase.Tty,
				})
				hasErr := err != nil

				if len(testCase.Error) > 0 {
					if !hasErr {
						t.Errorf("%s: expected an error", name)
					} else {
						if e, a := testCase.Error, err.Error(); !strings.Contains(a, e) {
							t.Errorf("%s: expected error stream read %q, got %q", name, e, a)
						}
					}
					return
				}

				if hasErr {
					t.Fatalf("%s: unexpected error: %v", name, err)
				}

				if len(testCase.Stdout) > 0 {
					if e, a := strings.Repeat(testCase.Stdout, testCase.MessageCount), localOut; e != a.String() {
						t.Fatalf("%s: expected stdout data %q, got %q", name, e, a)
					}
				}

				if testCase.Stderr != "" {
					if e, a := strings.Repeat(testCase.Stderr, testCase.MessageCount), localErr; e != a.String() {
						t.Fatalf("%s: expected stderr data %q, got %q", name, e, a)
					}
				}

				select {
				case <-requestReceived:
				case <-time.After(time.Minute):
					t.Errorf("%s: expected fakeServerInstance to receive request", name)
				}
			})
		}
	}
}