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|
package htmlquery
import (
"compress/gzip"
"fmt"
"io/ioutil"
"net/http"
"net/http/httptest"
"os"
"strings"
"sync"
"testing"
"github.com/antchfx/xpath"
"golang.org/x/net/html"
)
const htmlSample = `<!DOCTYPE html><html lang="en-US">
<head>
<title>Hello,World!</title>
</head>
<body>
<div class="container">
<header>
<!-- Logo -->
<h1>City Gallery</h1>
</header>
<nav>
<ul>
<li><a href="/London">London</a></li>
<li><a href="/Paris">Paris</a></li>
<li><a href="/Tokyo">Tokyo</a></li>
</ul>
</nav>
<article>
<h1>London</h1>
<img src="pic_mountain.jpg" alt="Mountain View" style="width:304px;height:228px;">
<p>London is the capital city of England. It is the most populous city in the United Kingdom, with a metropolitan area of over 13 million inhabitants.</p>
<p>Standing on the River Thames, London has been a major settlement for two millennia, its history going back to its founding by the Romans, who named it Londinium.</p>
</article>
<footer>Copyright © W3Schools.com</footer>
</div>
</body>
</html>
`
var testDoc = loadHTML(htmlSample)
func BenchmarkSelectorCache(b *testing.B) {
DisableSelectorCache = false
for i := 0; i < b.N; i++ {
getQuery("/AAA/BBB/DDD/CCC/EEE/ancestor::*")
}
}
func BenchmarkDisableSelectorCache(b *testing.B) {
DisableSelectorCache = true
for i := 0; i < b.N; i++ {
getQuery("/AAA/BBB/DDD/CCC/EEE/ancestor::*")
}
}
func TestSelectorCache(t *testing.T) {
SelectorCacheMaxEntries = 2
for i := 1; i <= 3; i++ {
getQuery(fmt.Sprintf("//a[position()=%d]", i))
}
getQuery("//a[position()=3]")
}
func TestLoadURL(t *testing.T) {
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
fmt.Fprint(w, htmlSample)
}))
defer ts.Close()
_, err := LoadURL(ts.URL)
if err != nil {
t.Fatal(err)
}
}
func TestLoadURLWithGzipResponse(t *testing.T) {
ts := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Header().Add("Content-Encoding", "gzip")
gz := gzip.NewWriter(w)
defer gz.Close()
fmt.Fprint(gz, htmlSample)
}))
defer ts.Close()
_, err := LoadURL(ts.URL)
if err != nil {
t.Fatal(err)
}
}
func TestLoadDoc(t *testing.T) {
tempHTMLdoc, err := ioutil.TempFile("", "sample_*.html")
if err != nil {
t.Fatal(err)
}
tempHTMLFilename := tempHTMLdoc.Name()
defer func(tempHTMLdoc *os.File, filename string) {
tempHTMLdoc.Close()
os.Remove(filename)
}(tempHTMLdoc, tempHTMLFilename)
tempHTMLdoc.Write([]byte(htmlSample))
if _, err := LoadDoc(tempHTMLFilename); err != nil {
t.Fatal(err)
}
}
func TestNavigator(t *testing.T) {
top := FindOne(testDoc, "//html")
nav := &NodeNavigator{curr: top, root: top, attr: -1}
nav.MoveToChild() // HEAD
nav.MoveToNext()
if nav.NodeType() != xpath.TextNode {
t.Fatalf("expectd node type is TextNode,but got %vs", nav.NodeType())
}
nav.MoveToNext() // <BODY>
if nav.Value() != InnerText(FindOne(testDoc, "//body")) {
t.Fatal("body not equal")
}
nav.MoveToPrevious() //
nav.MoveToParent() //<HTML>
if nav.curr != top {
t.Fatal("current node is not html node")
}
nav.MoveToNextAttribute()
if nav.LocalName() != "lang" {
t.Fatal("node not move to lang attribute")
}
nav.MoveToParent()
nav.MoveToFirst() // <!DOCTYPE html>
if nav.curr.Type != html.DoctypeNode {
t.Fatalf("expected node type is DoctypeNode,but got %d", nav.curr.Type)
}
}
func TestXPath(t *testing.T) {
node := FindOne(testDoc, "//html")
if SelectAttr(node, "lang") != "en-US" {
t.Fatal("//html[@lang] != en-Us")
}
node = FindOne(testDoc, "//header")
if strings.Index(InnerText(node), "Logo") > 0 {
t.Fatal("InnerText() have comment node text")
}
if !strings.Contains(OutputHTML(node, true), "Logo") {
t.Fatal("OutputHTML() shoud have comment node text")
}
link := FindOne(testDoc, "//a[1]/@href")
if link == nil {
t.Fatal("link is nil")
}
if v := InnerText(link); v != "/London" {
t.Fatalf("expect value is /London, but got %s", v)
}
}
func TestXPathCdUp(t *testing.T) {
doc := loadHTML(`<html><b attr="1"></b></html>`)
node := FindOne(doc, "//b/@attr/..")
t.Logf("node = %#v", node)
if node == nil || node.Data != "b" {
t.Fatal("//b/@id/.. != <b></b>")
}
}
func TestConcurrentQuery(t *testing.T) {
var wg sync.WaitGroup
for i := 0; i < 10; i++ {
wg.Add(1)
go func(i int) {
defer wg.Done()
s := `<html><head></head><body><div>a</div></body>`
doc := loadHTML(s)
if n := FindOne(doc, `//div`); n == nil {
t.Fatalf("should find one but got nil [%d]", i)
}
}(i)
}
wg.Wait()
}
func loadHTML(str string) *html.Node {
node, err := Parse(strings.NewReader(str))
if err != nil {
panic(err)
}
return node
}
|
