KaneAI - World’s First E2E Software Testing Agent.Signup for Private Beta Join TestMu Conference

How to use DialContext method of cdp Package

Best Rod code snippet using cdp.DialContext

devtools_test.go

Source:devtools_test.go

...125func TestDevtools(t *testing.T) {126	ctx, cancel := context.WithTimeout(context.Background(), 200*time.Millisecond)127	defer cancel()128	browserWs := fmt.Sprintf("ws://%s/", srv.Listener.Addr().String())129	browserConn, err := rpcc.DialContext(ctx, browserWs)130	AssertThat(t, err, Is{nil})131	defer browserConn.Close()132	browserClient := cdp.NewClient(browserConn)133	targets, err := browserClient.Target.GetTargets(ctx)134	AssertThat(t, err, Is{nil})135	AssertThat(t, len(targets.TargetInfos), EqualTo{2})136	defaultPageWs := fmt.Sprintf("ws://%s/page", srv.Listener.Addr().String())137	defaultPageConn, err := rpcc.DialContext(ctx, defaultPageWs)138	AssertThat(t, err, Is{nil})139	defer defaultPageConn.Close()140	defaultPageClient := cdp.NewClient(defaultPageConn)141	err = defaultPageClient.Page.Enable(ctx)142	AssertThat(t, err, Is{nil})143	selectedPageWs := fmt.Sprintf("ws://%s/page/%s", srv.Listener.Addr().String(), targets.TargetInfos[1].TargetID)144	selectedPageConn, err := rpcc.DialContext(ctx, selectedPageWs)145	AssertThat(t, err, Is{nil})146	defer selectedPageConn.Close()147	selectedPageClient := cdp.NewClient(selectedPageConn)148	err = selectedPageClient.Page.Enable(ctx)149	AssertThat(t, err, Is{nil})150}151func TestDetectDevtoolsHost(t *testing.T) {152	name, _ := ioutil.TempDir("", "devtools")153	defer os.RemoveAll(name)154	profilePath := filepath.Join(name, ".org.chromium.Chromium.deadbee")155	os.MkdirAll(profilePath, os.ModePerm)156	portFile := filepath.Join(profilePath, "DevToolsActivePort")157	ioutil.WriteFile(portFile, []byte("12345\n/devtools/browser/6f37c7fe-a0a6-4346-a6e2-80c5da0687f0"), 0644)158	AssertThat(t, detectDevtoolsHost(name), EqualTo{"127.0.0.1:12345"})...

headless.go

Source:headless.go

...11// fallbackHeadlessCreateURL tries to create a new target for Headless Chrome12// that does not support the json new endpoint. A rpcc connection is established13// to the "/devtools/browser" endpoint and "Target.createTarget" is issued.14func fallbackHeadlessCreateURL(ctx context.Context, d *DevTools, openURL string) (*Target, error) {15	// Context must be set, rpcc DialContext panics on nil context.16	if ctx == nil {17		ctx = context.Background()18	}19	// Headless Chrome requires a non-empty URL for CreateTarget.20	if openURL == "" {21		openURL = "about:blank"22	}23	wsURL := "ws://" + httpRe.ReplaceAllString(d.url, "") + "/devtools/browser"24	conn, err := rpcc.DialContext(ctx, wsURL)25	if err != nil {26		return nil, err27	}28	defer conn.Close()29	c := cdp.NewClient(conn)30	t, err := c.Target.CreateTarget(ctx, target.NewCreateTargetArgs(openURL))31	if err != nil {32		return nil, err33	}34	// List must be called after CreateTarget (headless bug):35	// https://bugs.chromium.org/p/chromium/issues/detail?id=70450336	list, err := d.List(ctx)37	if err != nil {38		return nil, err...

DialContext

Using AI Code Generation

1import (2func main() {3	ctx, cancel := chromedp.NewContext(context.Background())4	defer cancel()5	ctx, cancel = context.WithTimeout(ctx, 15*time.Second)6	defer cancel()7	err := chromedp.Run(ctx,8		chromedp.WaitVisible(`#main`, chromedp.ByID),9		chromedp.WaitReady(`#main`, chromedp.ByID),10		chromedp.OuterHTML(`html`, &res, chromedp.ByQuery),11	if err != nil {12		log.Fatal(err)13	}14	log.Printf("html: %s", res)15}

Automation Testing Tutorials

Learn to execute automation testing from scratch with LambdaTest Learning Hub. Right from setting up the prerequisites to run your first automation test, to following best practices and diving deeper into advanced test scenarios. LambdaTest Learning Hubs compile a list of step-by-step guides to help you be proficient with different test automation frameworks i.e. Selenium, Cypress, TestNG etc.