如何在Golang中比较HTML标记？

I'm trying to come up with a test suite which checks HTML fragments/files are canonically equivalent to one another. I was surprised to see that if I parse the same string or file, the https://godoc.org/golang.org/x/net/html#Node was comparing as different. What am I missing?

Hopefully this demonstrates the issue:

package main

import (
    "fmt"
    "strings"

    "golang.org/x/net/html"
)

func main() {
    s := `<h1>
    test
    </h1><p>foo</p>`
    // s2 := `<h1>test</h1><p>foo</p>`

    doc, _ := html.Parse(strings.NewReader(s))
    doc2, _ := html.Parse(strings.NewReader(s))

    if doc == doc2 {
        fmt.Println("HTML is the same") // Expected this
    } else {
        fmt.Println("HTML is not the same") // Got this
    }
}

HTML is not the same

The simplest way is to use reflection, since html.Parse returns *Node object. Comparing two of objects in Go need a reflect.DeepEqual.

if reflect.DeepEqual(doc, doc2) {                                     
        fmt.Println("HTML is the same") 
} else {
        fmt.Println("HTML is not the same")                         
}

This prints out "HTML is the same".