11WebDriver.md

WebDriver

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WebDriver provides a concise interface for accessing and interacting with web pages, with all actions and behaviors optimized to mimic real humans as closely as possible, such as scrolling, clicking, typing text, dragging and dropping, etc.

The methods in this interface are mainly divided into three categories:

1. Control over the browser itself.
2. Selecting elements, extracting text content, and attributes.
3. Interacting with web pages.

The main methods include:

• .navigateTo(): Load a new web page.
• .scrollDown(): Scroll down on the web page to fully load the page. Most modern web pages support lazy loading using AJAX technology, meaning that web page content only begins to load when it scrolls into view.
• .pageSource(): Obtain the web page source code.

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")
    }
}

Complete code: kotlin, Chinese mirror.

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