WebDriver 定义了一个简洁的界面来访问网页并与之交互，所有的动作和行为都经过优化，尽可能地模仿真人，比如滚动、点击、键入文本、拖放等。
该接口中的方法主要分为三类：
最主要的方法有：
class WebDriverDemo(private val session: PulsarSession) {
private val logger = LoggerFactory.getLogger(this.javaClass)
private val searchBoxSelector = ".form input[type=text]"
private val searchBoxSubmit = ".form input[type=submit]"
val fieldSelectors = mutableMapOf(
"title" to "#productTitle",
"reviews" to "#acrCustomerReviewText",
"prodDetails" to "#prodDetails"
)
fun options(args: String): LoadOptions {
val options = session.options(args)
val be = options.event.browseEventHandlers
be.onDocumentActuallyReady.addLast { page, driver ->
fieldSelectors.values.forEach { interact1(it, driver) }
}
be.onDocumentActuallyReady.addLast { page, driver ->
interact2(driver)
}
be.onDidInteract.addLast { page, driver ->
logger.info("Did the interaction")
}
return options
}
private suspend fun interact1(selector: String, driver: WebDriver) {
if (driver.exists(selector)) {
println("click $selector ...")
driver.click(selector)
println("select first text by $selector ...")
var text = driver.firstText(selector) ?: "no-text"
text = text.substring(1, 4)
println("type $text in $searchBoxSelector ...")
driver.type(searchBoxSelector, text)
}
}
private suspend fun interact2(driver: WebDriver) {
val selector = "#productTitle"
println("bring the page to front ...")
driver.bringToFront()
println("scroll to the bottom of the page ...")
driver.scrollToBottom()
println("bounding box of body: " + driver.boundingBox("body"))
println("scroll to the middle of the page ...")
driver.scrollToMiddle(0.5f)
println("click $selector ...")
driver.click(selector)
println("query text of $selector ...")
var text = driver.firstText(selector) ?: "no-text"
text = text.substring(1, 4)
println("type `$text` in $searchBoxSelector")
driver.type(searchBoxSelector, text)
println("capture screenshot over $selector ...")
driver.captureScreenshot(selector)
println("evaluate 1 + 1 ...")
val result = driver.evaluate("1 + 1")
require(result is Int)
println("evaluate 1 + 1 returns $result")
println("wheel down for 5 times ...")
driver.mouseWheelDown(5, delayMillis = 2000)
println("scroll to top ...")
driver.mouseWheelDown(5, delayMillis = 2000)
driver.scrollToTop()
println("search ...")
text = "Vincent Willem van Gogh"
println("type `$text` in $searchBoxSelector")
driver.type(searchBoxSelector, text)
driver.click(searchBoxSubmit)
val url = driver.currentUrl()
println("the page navigated to $url")
}
}