example:
func TestSimple(tt *testing.T) {
t := webtester.Setup(tt, chrome.DriverPath)
defer t.TearDown()
d := t.OpenBrowser()
d.SetPageLoadTimeout(4 * time.Second)
d.VisitTo("https://tour.golang.org/welcome/1")
d.WaitFor("id:run")
d.MustFindElement("id:run").Click()
d.WaitFor("class:stdout")
d.MustFindElement("class:stdout").VerifyText(strings.Contains, "Hello")
d.MustFindElement("class:next-page").Click()
d.ExpectTransitTo("/welcome/2").TakeScreenshot("page2.png")
}