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browser_test.go
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package browser_test
import (
"bytes"
"fmt"
"log/slog"
"net/http"
"testing"
. "github.com/gost-dom/browser"
"github.com/gost-dom/browser/dom/event"
. "github.com/gost-dom/browser/internal/testing/gomega-matchers"
"github.com/gost-dom/browser/internal/testing/htmltest"
. "github.com/gost-dom/browser/testing/gomega-matchers"
"github.com/onsi/gomega"
"github.com/stretchr/testify/suite"
)
type BrowserTestSuite struct {
suite.Suite
}
func (s *BrowserTestSuite) TestReadFromHTTPHandler() {
Expect := gomega.NewWithT(s.T()).Expect
handler := (http.HandlerFunc)(func(w http.ResponseWriter, r *http.Request) {
w.WriteHeader(200)
w.Header().Add("Content-Type", "text/html") // For good measure, not used yet"
w.Write([]byte("<html></html>"))
})
browser := NewBrowserFromHandler(handler)
result, err := browser.Open("/")
Expect(err).ToNot(HaveOccurred())
element := result.Document().DocumentElement()
Expect(element.NodeName()).To(Equal("HTML"))
Expect(element.TagName()).To(Equal("HTML"))
}
func (s *BrowserTestSuite) TestExecuteScript() {
Expect := gomega.NewWithT(s.T()).Expect
// This is not necessarily desired behaviour right now.
server := http.NewServeMux()
server.Handle(
"GET /index.html",
http.HandlerFunc(func(res http.ResponseWriter, req *http.Request) {
res.Write([]byte(`<body>
<div id='target'></div>
<script>
const target = document.getElementById('target');
target.textContent = "42"
</script>
</body>`))
}),
)
browser := NewBrowserFromHandler(server)
s.T().Cleanup(browser.Close)
win, err := browser.Open("/index.html")
Expect(err).ToNot(HaveOccurred())
target := win.Document().GetElementById("target")
Expect(target).To(HaveOuterHTML(Equal(`<div id="target">42</div>`)))
}
func TestBrowserSuite(t *testing.T) {
suite.Run(t, new(BrowserTestSuite))
}
type BrowserNavigationTestSuite struct {
suite.Suite
gomega.Gomega
}
func (s *BrowserNavigationTestSuite) SetupTest() {
s.Gomega = gomega.NewWithT(s.T())
}
func (s *BrowserNavigationTestSuite) loadPageA() htmltest.WindowHelper {
server := newBrowserNavigateTestServer()
browser := htmltest.NewBrowserHelper(s.T(), NewBrowserFromHandler(server))
window := browser.OpenWindow("/a.html")
return window
}
func (s *BrowserNavigationTestSuite) TestPageAHasLoaded() {
Expect := gomega.NewWithT(s.T()).Expect
window := s.loadPageA()
heading, _ := window.Document().QuerySelector("h1")
Expect(heading).To(HaveTextContent(Equal("Page A")))
Expect(window.ScriptContext().Eval("loadedA")).To(Equal("PAGE A"))
}
func (s *BrowserNavigationTestSuite) TestClickLink() {
window := s.loadPageA()
window.HTMLDocument().QuerySelectorHTML("a").Click()
heading, _ := window.Document().QuerySelector("h1")
s.Expect(heading).To(HaveTextContent(Equal("Page B")))
s.Expect(window.ScriptContext().Eval("loadedB")).To(Equal("PAGE B"))
// The global state should have been cleared
s.Expect(window.ScriptContext().Eval("typeof loadedA")).To(Equal("undefined"))
}
func (s *BrowserNavigationTestSuite) TestNavigationAbortedByEventHandler() {
window := s.loadPageA()
anchor := window.HTMLDocument().QuerySelectorHTML("a")
anchor.AddEventListener(
"click",
event.NewEventHandlerFunc(event.NoError((*event.Event).PreventDefault)),
)
anchor.Click()
heading, _ := window.Document().QuerySelector("h1")
s.Expect(heading).To(HaveTextContent(Equal("Page A")))
}
func TestBrowserNavigation(t *testing.T) {
suite.Run(t, new(BrowserNavigationTestSuite))
}
type CookiesTestSuite struct {
suite.Suite
}
func (s *CookiesTestSuite) TestCookiesArePersistedInSameBrowser() {
Expect := gomega.NewWithT(s.T()).Expect
browser := NewBrowserFromHandler(http.HandlerFunc(cookieHandler))
win, err := browser.Open("http://localhost/")
Expect(err).ToNot(HaveOccurred())
el := win.Document().GetElementById("gost")
Expect(el).To(HaveTextContent(""))
Expect(win.Navigate("http://localhost/")).To(Succeed())
el = win.Document().GetElementById("gost")
Expect(el).To(HaveTextContent("Hello, World!"))
}
func (s *CookiesTestSuite) TestCookiesAreNotReusedInNewBrowser() {
Expect := gomega.NewWithT(s.T()).Expect
browser := New(WithHandler(http.HandlerFunc(cookieHandler)))
win, err := browser.Open("http://localhost/")
Expect(err).ToNot(HaveOccurred())
el := win.Document().GetElementById("gost")
Expect(el).To(HaveTextContent(""))
browser = NewBrowserFromHandler(http.HandlerFunc(cookieHandler))
win, err = browser.Open("http://localhost/")
Expect(err).ToNot(HaveOccurred())
el = win.Document().GetElementById("gost")
Expect(el).To(HaveTextContent(""))
}
func TestCookies(t *testing.T) {
suite.Run(t, new(CookiesTestSuite))
}
func TestLogOutput(t *testing.T) {
var b bytes.Buffer
Expect := gomega.NewWithT(t).Expect
logger := slog.New(slog.NewTextHandler(&b, &slog.HandlerOptions{
Level: slog.LevelDebug,
}))
browser := New(
WithHandler(http.HandlerFunc(cookieHandler)),
WithLogger(logger),
)
win, err := browser.Open("http://localhost/")
Expect(err).ToNot(HaveOccurred())
win.Run("console.log('foo bar')")
Expect(b.String()).To(ContainSubstring("foo bar"))
// Expect(b.String()).ToNot(ContainSubstring("Dispatch event"))
b.Reset()
win.DispatchEvent(event.NewCustomEvent("dummy", event.CustomEventInit{}))
Expect(b.String()).To(ContainSubstring(`msg="Dispatch event"`))
b.Reset()
win.Document().Body().AppendChild(win.Document().CreateElement("div"))
win.Document().Body().DispatchEvent(event.NewCustomEvent("dummy", event.CustomEventInit{}))
Expect(b.String()).To(ContainSubstring(`msg=Node.AppendChild`))
Expect(b.String()).To(ContainSubstring(`msg="Dispatch event"`))
b.Reset()
}
func cookieHandler(w http.ResponseWriter, r *http.Request) {
var gost string
if c, _ := r.Cookie("gost"); c != nil {
gost = c.Value
}
w.Header().Add("Set-Cookie", "gost=Hello, World!")
w.Write([]byte(fmt.Sprintf(`<body><div id="gost">%s</div></body>`, gost)))
}
func newBrowserNavigateTestServer() http.Handler {
server := http.NewServeMux()
server.HandleFunc("GET /a.html",
func(res http.ResponseWriter, req *http.Request) {
res.Write([]byte(
`<body>
<h1>Page A</h1>
<a href="b.html">Load B</a>
<script>loadedA = "PAGE A"</script>
</body>`))
})
server.HandleFunc("GET /b.html",
func(res http.ResponseWriter, req *http.Request) {
res.Write([]byte(`
<body>
<h1>Page B</h1>
<script>loadedB = "PAGE B"</script>
</body>`))
})
return server
}