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: render_test.go
    path of file: ./repos/gitkube/vendor/golang.org/x/net/html
    
    the code of the file until where you have to start completion: // Copyright 2010 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package html

import (
	"bytes"
	"testing"
)

func TestRenderer(t *testing.T) {
	nodes := [...]*Node{
		0: {
			Type: ElementNode,
			Data: "html",
		},
		1: {
			Type: ElementNode,
			Data: "head",
		},
		2: {
			Type: ElementNode,
			Data: "body",
		},
		3: {
			Type: TextNode,
			Data: "0<1",
		},
		4: {
			Type: ElementNode,
			Data: "p",
			Attr: []Attribute{
				{
					Key: "id",
					Val: "A",
				},
				{
					Key: "foo",
					Va
    
func TestRenderer(t *testing.T) {
	nodes := [...]*Node{
		0: {
			Type: ElementNode,
			Data: "html",
		},
		1: {
			Type: ElementNode,
			Data: "head",
		},
		2: {
			Type: ElementNode,
			Data: "body",
		},
		3: {
			Type: TextNode,
			Data: "0<1",
		},
		4: {
			Type: ElementNode,
			Data: "p",
			Attr: []Attribute{
				{
					Key: "id",
					Val: "A",
				},
				{
					Key: "foo",
					Val: `abc"def`,
				},
			},
		},
		5: {
			Type: TextNode,
			Data: "2",
		},
		6: {
			Type: ElementNode,
			Data: "b",
			Attr: []Attribute{
				{
					Key: "empty",
					Val: "",
				},
			},
		},
		7: {
			Type: TextNode,
			Data: "3",
		},
		8: {
			Type: ElementNode,
			Data: "i",
			Attr: []Attribute{
				{
					Key: "backslash",
					Val: `\`,
				},
			},
		},
		9: {
			Type: TextNode,
			Data: "&4",
		},
		10: {
			Type: TextNode,
			Data: "5",
		},
		11: {
			Type: ElementNode,
			Data: "blockquote",
		},
		12: {
			Type: ElementNode,
			Data: "br",
		},
		13: {
			Type: TextNode,
			Data: "6",
		},
	}

	// Build a tree out of those nodes, based on a textual representation.
	// Only the ".\t"s are significant. The trailing HTML-like text is
	// just commentary. The "0:" prefixes are for easy cross-reference with
	// the nodes array.
	treeAsText := [...]string{
		0: `<html>`,
		1: `.	<head>`,
		2: `.	<body>`,
		3: `.	.	"0&lt;1"`,
		4: `.	.	<p id="A" foo="abc&#34;def">`,
		5: `.	.	.	"2"`,
		6: `.	.	.	<b empty="">`,
		7: `.	.	.	.	"3"`,
		8: `.	.	.	<i backslash="\">`,
		9: `.	.	.	.	"&amp;4"`,
		10: `.	.	"5"`,
		11: `.	.	<blockquote>`,
		12: `.	.	<br>`,
		13: `.	.	"6"`,
	}
	if len(nodes) != len(treeAsText) {
		t.Fatal("len(nodes) != len(treeAsText)")
	}
	var stack [8]*Node
	for i, line := range treeAsText {
		level := 0
		for line[0] == '.' {
			// Strip a leading ".\t".
			line = line[2:]
			level++
		}
		n := nodes[i]
		if level == 0 {
			if stack[0] != nil {
				t.Fatal("multiple root nodes")
			}
			stack[0] = n
		} else {
			stack[level-1].AppendChild(n)
			stack[level] = n
			for i := level + 1; i < len(stack); i++ {
				stack[i] = nil
			}
		}
		// At each stage of tree construction, we check all nodes for consistency.
		for j, m := range nodes {
			if err := checkNodeConsistency(m); err != nil {
				t.Fatalf("i=%d, j=%d: %v", i, j, err)
			}
		}
	}

	want := `<html><head></head><body>0&lt;1<p id="A" foo="abc&#34;def">` +
		`2<b empty="">3</b><i backslash="\">&amp;4</i></p>` +
		`5<blockquote></blockquote><br/>6</body></html>`
	b := new(bytes.Buffer)
	if err := Render(b, nodes[0]); err != nil {
		t.Fatal(err)
	}
	if got := b.String(); got != want {
		t.Errorf("got vs want:\n%s\n%s\n", got, want)
	}
}