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nav_test.go
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nav_test.go
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package chromedp
import (
"context"
"errors"
"fmt"
_ "image/png"
"io"
"net/http"
"net/http/httptest"
"strings"
"sync"
"testing"
"time"
"github.com/chromedp/cdproto/cdp"
"github.com/chromedp/cdproto/page"
)
func TestNavigate(t *testing.T) {
t.Parallel()
ctx, cancel := testAllocate(t, "image.html")
defer cancel()
var urlstr, title string
if err := Run(ctx,
Location(&urlstr),
Title(&title),
); err != nil {
t.Fatal(err)
}
if !strings.HasSuffix(urlstr, "image.html") {
t.Errorf("want to be on image.html, at %q", urlstr)
}
exptitle := "this is title"
if title != exptitle {
t.Errorf("want title to be %q, got %q", title, exptitle)
}
}
func TestNavigationEntries(t *testing.T) {
t.Parallel()
ctx, cancel := testAllocate(t, "")
defer cancel()
tests := []struct {
file, waitID string
}{
{"form.html", "#form"},
{"image.html", "#icon-brankas"},
}
var entries []*page.NavigationEntry
var index int64
if err := Run(ctx, NavigationEntries(&index, &entries)); err != nil {
t.Fatal(err)
}
if len(entries) != 1 {
t.Errorf("expected to have 1 navigation entry: got %d", len(entries))
}
if index != 0 {
t.Errorf("expected navigation index is 0, got: %d", index)
}
expIdx, expEntries := 1, 2
for i, test := range tests {
if err := Run(ctx,
Navigate(testdataDir+"/"+test.file),
NavigationEntries(&index, &entries),
); err != nil {
t.Fatal(err)
}
if len(entries) != expEntries {
t.Errorf("test %d expected to have %d navigation entry: got %d", i, expEntries, len(entries))
}
if want := int64(i + 1); index != want {
t.Errorf("test %d expected navigation index is %d, got: %d", i, want, index)
}
expIdx++
expEntries++
}
}
func TestNavigateToHistoryEntry(t *testing.T) {
t.Parallel()
ctx, cancel := testAllocate(t, "image.html")
defer cancel()
var entries []*page.NavigationEntry
var index int64
if err := Run(ctx,
NavigationEntries(&index, &entries),
Navigate(testdataDir+"/form.html"),
); err != nil {
t.Fatal(err)
}
var title string
if err := Run(ctx,
NavigateToHistoryEntry(entries[index].ID),
Title(&title),
); err != nil {
t.Fatal(err)
}
if title != entries[index].Title {
t.Errorf("expected title to be %q, instead title is %q", entries[index].Title, title)
}
}
func TestNavigateBack(t *testing.T) {
t.Parallel()
ctx, cancel := testAllocate(t, "form.html")
defer cancel()
var title, exptitle string
if err := Run(ctx,
Title(&exptitle),
Navigate(testdataDir+"/image.html"),
NavigateBack(),
Title(&title),
); err != nil {
t.Fatal(err)
}
if title != exptitle {
t.Errorf("expected title to be %q, instead title is %q", exptitle, title)
}
}
func TestNavigateForward(t *testing.T) {
t.Parallel()
ctx, cancel := testAllocate(t, "form.html")
defer cancel()
var title, exptitle string
if err := Run(ctx,
Navigate(testdataDir+"/image.html"),
Title(&exptitle),
NavigateBack(),
NavigateForward(),
Title(&title),
); err != nil {
t.Fatal(err)
}
if title != exptitle {
t.Errorf("expected title to be %q, instead title is %q", exptitle, title)
}
}
func TestStop(t *testing.T) {
t.Parallel()
ctx, cancel := testAllocate(t, "form.html")
defer cancel()
if err := Run(ctx, Stop()); err != nil {
t.Fatal(err)
}
}
func TestReload(t *testing.T) {
t.Parallel()
count := 0
// create test server
mux := http.NewServeMux()
mux.HandleFunc("/", func(res http.ResponseWriter, req *http.Request) {
fmt.Fprintf(res, `<html>
<head>
<title>Title %d</title>
</head>
</html>`, count)
count++
})
s := httptest.NewServer(mux)
defer s.Close()
ctx, cancel := testAllocate(t, "")
defer cancel()
var firstTitle, secondTitle string
if err := Run(ctx,
Navigate(s.URL),
Title(&firstTitle),
Reload(),
Title(&secondTitle),
); err != nil {
t.Fatal(err)
}
if want := "Title 0"; firstTitle != want {
t.Errorf("expected first title to be %q, instead title is %q", want, firstTitle)
}
if want := "Title 1"; secondTitle != want {
t.Errorf("expected second title to be %q, instead title is %q", want, secondTitle)
}
}
func TestLocation(t *testing.T) {
t.Parallel()
ctx, cancel := testAllocate(t, "form.html")
defer cancel()
var urlstr string
if err := Run(ctx, Location(&urlstr)); err != nil {
t.Fatal(err)
}
if !strings.HasSuffix(urlstr, "form.html") {
t.Fatalf("expected to be on form.html, got %q", urlstr)
}
}
func TestTitle(t *testing.T) {
t.Parallel()
ctx, cancel := testAllocate(t, "image.html")
defer cancel()
var title string
if err := Run(ctx, Title(&title)); err != nil {
t.Fatal(err)
}
exptitle := "this is title"
if title != exptitle {
t.Fatalf("expected title to be %q, got %q", exptitle, title)
}
}
func TestQueryIframe(t *testing.T) {
t.Parallel()
ctx, cancel := testAllocate(t, "iframe.html")
defer cancel()
var iframes, forms []*cdp.Node
if err := Run(ctx, Nodes(`iframe`, &iframes, ByQuery)); err != nil {
t.Fatal(err)
}
iframe := iframes[0]
if err := Run(ctx, Nodes(`#form`, &forms, ByQuery, FromNode(iframe))); err != nil {
t.Fatal(err)
}
form := forms[0]
var gotFoo string
if err := Run(ctx,
WaitVisible(`#form`, ByQuery, FromNode(iframe)),
Text("#foo", &gotFoo, ByQuery, FromNode(form)),
Click("#btn1", ByQuery, FromNode(iframe)),
Click("#btn2", ByQuery, FromNode(form)),
); err != nil {
t.Fatal(err)
}
if want := "insert"; gotFoo != want {
t.Fatalf("wanted %q, got %q", want, gotFoo)
}
}
func TestNavigateContextTimeout(t *testing.T) {
t.Parallel()
ctx, cancel := testAllocate(t, "")
defer cancel()
// Serve the page, but cancel the context almost immediately after.
// Navigate shouldn't block waiting for the load to finish, which may
// not come as the target is cancelled.
s := httptest.NewServer(http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
time.AfterFunc(time.Millisecond, cancel)
}))
defer s.Close()
if err := Run(ctx, Navigate(s.URL)); err != nil && err != context.Canceled {
t.Fatal(err)
}
}
func writeHTML(content string) http.Handler {
return http.HandlerFunc(func(w http.ResponseWriter, r *http.Request) {
w.Header().Set("Content-Type", "text/html")
io.WriteString(w, strings.TrimSpace(content))
})
}
func TestNavigateWhileLoading(t *testing.T) {
t.Parallel()
ctx, cancel := testAllocate(t, "")
defer cancel()
mux := http.NewServeMux()
mux.Handle("/", writeHTML(`
<img src="/img.jpg"></img>
`))
ch := make(chan struct{})
mux.HandleFunc("/img.jpg", func(w http.ResponseWriter, r *http.Request) {
<-ch
})
s := httptest.NewServer(mux)
defer s.Close()
// First, navigate to a page that starts loading, but doesn't finish.
// Then, tell the server to finish loading the page.
// Immediately after, navigate to another page.
// Finally, grab the page title, which should correspond with the last
// page.
//
// This has caused problems in the past. Because the first page might
// fire its load event just as we start the second navigate, the second
// navigate used to get confused, either blocking forever or not waiting
// for the right load event (the second).
var title string
if err := Run(ctx,
ActionFunc(func(ctx context.Context) error {
var wg sync.WaitGroup
wg.Add(1)
lctx, cancel := context.WithCancel(ctx)
ListenTarget(lctx, func(ev interface{}) {
if ev, ok := ev.(*page.EventLifecycleEvent); ok {
if ev.Name == "init" {
cancel()
wg.Done()
}
}
})
_, _, _, err := page.Navigate(s.URL).Do(ctx)
// Make sure the Page.lifecycleEvent with the name "init" is emitted
// before starting the second navigate.
//
// Otherwise, it's possible that this event is emitted after the
// second navigate, and the second navigate will handle the wrong
// events. See https://github.com/chromedp/chromedp/issues/1080.
//
// The implementation of responseAction() is buggy in this case.
// But it's hard to fix it since there is not a way to tell whether
// the events are from the first navigate.
//
// I (ZekeLu) will just deflake this test by making sure the second
// navigate won't see this event from the first navigate.
//
// The issue can be reproduced by commenting out the next line.
wg.Wait()
ch <- struct{}{}
return err
}),
Navigate(testdataDir+"/image.html"),
Title(&title),
); err != nil {
t.Fatal(err)
}
exptitle := "this is title"
if title != exptitle {
t.Errorf("want title to be %q, got %q", exptitle, title)
}
}
func TestNavigateWithoutWaitingForLoad(t *testing.T) {
t.Parallel()
ctx, cancel := testAllocate(t, "")
defer cancel()
// If we run a query without waiting for the page to load, chromedp used
// to panic.
if err := Run(ctx,
ActionFunc(func(ctx context.Context) error {
_, _, _, err := page.Navigate(testdataDir + "/form.html").Do(ctx)
return err
}),
WaitVisible(`#form`, ByID), // for form.html
); err != nil {
t.Fatal(err)
}
}
func TestNavigateCancelled(t *testing.T) {
t.Parallel()
ctx, cancel := testAllocate(t, "")
defer cancel()
loadStarted := make(chan struct{})
mux := http.NewServeMux()
mux.Handle("/", writeHTML(`<img src="/img.jpg"></img>`))
mux.HandleFunc("/img.jpg", func(w http.ResponseWriter, r *http.Request) {
// Block until the entire test is done.
<-ctx.Done()
})
s := httptest.NewServer(mux)
defer s.Close()
defer cancel() // if we call s.Close first, the ctx.Done above hangs
// Navigate to a page that will navigate, but never finish loading. Once
// it has the HTML and starts loading an image, cancel the Run context.
// This should result in us seeing a context error.
action := ActionFunc(func(ctx context.Context) error {
_, _, _, err := page.Navigate(s.URL).Do(ctx)
loadStarted <- struct{}{}
return err
})
ctx2, cancel2 := context.WithCancel(ctx)
go func() {
<-loadStarted
cancel2()
}()
if _, err := RunResponse(ctx2, action); !errors.Is(err, context.Canceled) {
t.Fatalf("expected error to be %q, got: %v", context.Canceled, err)
}
}