Luke Daley on Geb - Speaker Deck

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Geb T o t a l l y G r o o v y B r o w s e r A u t o m a t i o n pronounced “jeb”

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Geb… What is it? Geb is a browser automation solution. It brings together the power of WebDriver, the elegance of jQuery content selection, the robustness of Page Object modelling and the expressiveness of the Groovy language.

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Provides a standardised API for “driving” browsers. WebDriver (a.k.a. Selenium 2)

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import org.openqa.selenium.WebDriver; import org.openqa.selenium.firefox.FirefoxDriver; // class FirefoxDriver implements WebDriver WebDriver driver = new FirefoxDriver(); WebDriver (a.k.a. Selenium 2)

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WebDriver (a.k.a. Selenium 2) Write to the WebDriver interface — run against any implementation — in theory

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jQuery “jQuery is a fast and concise JavaScript Library that simpliﬁes HTML document traversing, event handling, animating, and Ajax interactions for rapid web development. jQuery is designed to change the way that you write JavaScript.” - jquery.com

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jQuery Geb takes inspiration from jQuery // CSS 3 selectors $("div.some-class p:first[title='something']") // Find via index and/or attribute matching $("h1", 2, class: "heading") $("p", name: "description") $("ul.things li", 2) // Chaining $("div").find(".b") $("div").filter(".c").parents() $("p.c").siblings()

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Page Objects … What are they?

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“Page Objects are the embodiment of Programming Motherf#$&*r” - Samuel L Jackson http://programming-motherf #$&*r.com/ Page Objects

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Use of proper programming techniques to avoid duplication and brittleness. Page Objects driver.findElement(By.name("username")).sendKeys("username"); driver.findElement(By.name("password")).sendKeys("password"); driver.findElement(By.name("submitButton")).click(); Don’t do this

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Use of proper programming techniques to avoid duplication and brittleness. Page Objects login(“username”, “password”) Do do this

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Geb uses Groovy’s DSL capabilities and dynamism to facilitate Page Objects Page Objects import geb.Page class LoginPage extends Page { static content = { loginButton(to: AdminPage) { $("input[name=login]") } } def login(usernameValue, passwordValue) { username = usernameValue password = passwordValue loginButton.click() } }

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• Closures • methodMissing() / propertyMissing() • Duck Typing • Minimal punctuation

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to SomePage login "admin", "password" at AdminPage

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• WebDriver (browser automation) • jQuery (content traversal / interaction) • Page Objects (proper programming) • Groovy (minimal syntax, no ceremony) Geb… What is it? The product of…

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Geb Quickstart @Grapes([ @Grab("org.codehaus.geb:geb-core:0.6.1"), @Grab("org.seleniumhq.selenium:selenium-firefox-driver:2.9.0") ]) import geb.Browser Browser.drive { go "http://google.com/ncr" assert title == "Google" waitFor { q() }.value "wikipedia" waitFor { title.endsWith("Google Search") } $("li.g", 0).find("a.l").with { assert text() == "Wikipedia" click() } waitFor { title == "Wikipedia" } }

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Demo Google Wikipedia With Groovy Console

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Testing with Geb • JUnit (3 & 4) • TestNG • EasyB • Cuke4Duke (Cucumber for the JVM) • Spock Adapters for…

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Geb & Spock Geb ❤’s Spock import geb.spock.GebSpec class LoginSpec extends GebSpec { def "login to admin section"() { given: to LoginPage when: loginForm.with { username = "admin" password = "password" } and: loginButton.click() then: at AdminPage } }

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Demo ContactUsFormSpec github.com/geb/geb-uberconf-2011-example

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To & at def "at the front page"() { when: to FrontPage then: at FrontPage } to() navigates to a page at() veriﬁes we are where we expect to be

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To & at class FrontPage extends NavPage { static url = "home" static at = { assert nav.currentName == "Event Home" true } } to() uses url property to determine page address (combined with base url conﬁguration)

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To & at class FrontPage extends NavPage { static url = "home" static at = { assert nav.currentName == "Event Home" true } } at() runs the page’s at checker (do some checks on the page content)

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Page Delegation def "click the contact us link"() { when: footer.contactUsLink.click() then: at ContactUsPage } Unresolved properties/methods are automatically forwarded to the browser’s current page instance

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Page Content class BasePage extends geb.Page { static content = { container { $("div#container") } pageName { container.find("h1").text() } footer { module Footer, $("div#footer") } } } The content block is a DSL for naming the content on the page.

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Content Lookups class BasePage extends geb.Page { static content = { container { $("div#container") } pageName { container.find("h1").text() } footer { module Footer, $("div#footer") } } } The $() function is used to select page content It’s jQuery like

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The $() Function $(«css selector», «index / range», «attribute / text matchers») Lookups are a combination of CSS selectors, index or ranges and attribute and/or text matchers

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Css Selectors $(«css selector», «index / range», «attribute / text matchers») Any CSS expression supported by the browser (Complete CSS3, except for HTMLUnit) $("div.some-class p:first[title='something']") $("ul li a") $("table tr:nth-child(2n+1) td") $("div#content p:first-child::first-line")

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Indexes & Ranges $(«css selector», «index / range», «attribute / text matchers») Select content by index or grab a bunch with a range

$("p", 0) // a $("p", 2) // c $("p", 0..1) // a & b $("p", 1..2) // b & c

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Attribute/Text Matching $(«css selector», «index / range», «attribute / text matchers») Values of tag attributes can be matched “text” is a special attribute that matches the node text $("p", attr1: "a") $("p", attr2: "c") $("p", attr1: "a", attr2: "b") $("p", text: "p1") $("p", text: "p1", attr1: "a") $("p", text: ~/p./) $("p", text: startsWith("p")) $("p", text: endsWith("2"))

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Attribute/Text Matching $(«css selector», «index / range», «attribute / text matchers») Use regular expressions to do partial matches $("p", attr1: "a") $("p", attr2: "c") $("p", attr1: "a", attr2: "b") $("p", text: "p1") $("p", text: "p1", attr1: "a") $("p", text: ~/p./) $("p", text: startsWith("p")) $("p", text: endsWith("2"))

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$(«css selector», «index / range», «attribute / text matchers») Use builtin predicates for common partial matching

$("p", attr1: "a") $("p", attr2: "c") $("p", attr1: "a", attr2: "b") $("p", text: "p1") $("p", text: "p1", attr1: "a") $("p", text: ~/p./) $("p", text: startsWith("p")) $("p", text: endsWith("2")) Attribute/Text Matching

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Builtin Predicates All builtin predicates take strings and regular expressions startsWith iStartsWith contains iContains endsWith iEndsWith containsWord iContainsWord notStartsWith iNotStartsWith notContains iNotContains notEndsWith iNotEndsWith notContainsWord iNotContainsWord

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Relative Content

$() returns a “navigator” object which has methods for ﬁnding relative content $("p.d").previous() // 'p.c' $("p.e").prevAll() // 'p.c' & 'p.d' $("p.d").next() // 'p.e' $("p.c").nextAll() // 'p.d' & 'p.e' $("p.d").parent() // 'div.b' $("p.c").siblings() // 'p.d' & 'p.e' $("div.a").children() // 'div.b' & 'div.f' Plus more…

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Collection Goodness

Navigators are collections of collections (like jQuery) $("p").max { it.text() }.text() == "2" $("p").each { println it.text() } includes all the cool Groovy collection methods

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Building Content class BasePage extends geb.Page { static content = { container { $("div#container") } pageName { container.find("h1").text() } footer { module Footer, $("div#footer") } } } Content deﬁnitions can build on other deﬁned content

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Modules class BasePage extends geb.Page { static content = { container { $("div#container") } pageName { container.find("h1").text() } footer { module Footer, $("div#footer") } } } Modules are repeating/reappearing content that are modelled independently

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Modules class Footer extends geb.Module { static content = { auxillaryPageLink { $("ul.links a", text: iContains(it)) } contactUsLink(to: ContactUsPage) { auxillaryPageLink("contact us") } } } Modules deﬁne content, just like pages

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Module Base class Footer extends geb.Module { static content = { auxillaryPageLink { $("ul.links a", text: iContains(it)) } contactUsLink(to: ContactUsPage) { auxillaryPageLink("contact us") } } } Content lookups are relative to the module base

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Module Base class BasePage extends geb.Page { static content = { container { $("div#container") } pageName { container.find("h1").text() } footer { module Footer, $("div#footer") } } } You can specify the base in the content DSL when deﬁning the module in the owner

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Content Templates class Footer extends geb.Module { static content = { auxillaryPageLink { $("ul.links a", text: iContains(it)) } contactUsLink(to: ContactUsPage) { auxillaryPageLink("contact us") } } } Content blocks can take parameters

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Repeating Modules TitleAuthor Zero HistoryWilliam Gibson The Evolutionary VoidPeter F. Hamilton Modules are great for repeating content

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Repeating Modules Modules are great for repeating content class BooksPage extends Page { static content = { bookResults { module BookRow, $("table#book-results tbody tr", it) } } } class BookRow extends Module { static content = { cell { $("td", it) } title { cell(0).text() } author { cell(1).text() } } }

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Repeating Modules Modules are great for repeating content expect: bookResults(0).title == "Zero History" bookResults(1).author == "Peter F. Hamilton

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Content “to” class Footer extends geb.Module { static content = { auxillaryPageLink { $("ul.links a", text: iContains(it)) } contactUsLink(to: ContactUsPage) { auxillaryPageLink("contact us") } } } Content can deﬁne what page it navigates to when it is clicked

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Form Shortcuts def "fill in the form except for a message"() { when: name = "Peter Niederwieser" email = "[email protected]" sendButton.click() then: at ContactUsPage errorMessage == "message is required" } Assigning to undeﬁned properties sets the form value of the control with that name

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Content is anything def "fill in the form except for a message"() { when: name = "Peter Niederwieser" email = "[email protected]" sendButton.click() then: at ContactUsPage errorMessage == "message is required" } Deﬁned content in DSL can be anything

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Content is anything class ContactUsPage extends BasePage { static content = { errorMessage(required: false) { $("span.errorMessage").text() } sendButton(to: [ContactUsPage, FrontPage]) { $("input#FeedbackAdd_0") } } } Deﬁned content in DSL can be anything

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Optional Content class ContactUsPage extends BasePage { static content = { errorMessage(required: false) { $("span.errorMessage").text() } sendButton(to: [ContactUsPage, FrontPage]) { $("input#FeedbackAdd_0") } } } By default, a content template must return something Specify “required: false” to allow empty/false

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Inheritance class ContactUsPage extends BasePage { static content = { errorMessage(required: false) { $("span.errorMessage").text() } sendButton(to: [ContactUsPage, FrontPage]) { $("input#FeedbackAdd_0") } } } Pages can extend each other, inheriting all deﬁned content and methods etc. Works for modules too

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WebDriver Access driver.navigate().refresh() You can “drop down” to the WebDriver level whenever necessary $("p").firstElement() access the WebDriver instance

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WebDriver Access driver.navigate().refresh() You can “drop down” to the WebDriver level whenever necessary $("p").firstElement() access the WebElement instances

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JavaScript Interface function addThem(a,b) { return a + b; } Call JavaScript methods like they are Groovy js.addThem(1, 2) == 3 This is Groovy code

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JavaScript Interface var aVariable = 1; Access global JavaScript variables js.aVariable == 1 This is Groovy code

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jQuery Adapter The ‘jquery’ property on a navigator gives a jQuery object for matched content $("div#a").jquery.mouseover() useful for WebDriver interaction shortcomings

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Dynamic Pages Use waitFor() to deal with AJAX & effects // use default waiting configuration waitFor { «something» } // wait for up to 10 seconds, using the default retry interval waitFor(10) { «something» } // wait for up to 10 seconds, waiting half a second between retries waitFor(10, 0.5) { «something» } // use the preset “quick” as the wait settings waitFor("quick") { «something» }

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Dynamic Pages Use waitFor() to deal with AJAX & effects // wait for content to be present waitFor { $("p") } // wait for a condition waitFor { $("p").text() == "Message sent!" } // wait for any Groovy truth value waitFor { $("p").collect { it.text() } } // wait for a JavaScript redirect waitFor { at Somepage }

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Dynamic Pages Content can be speciﬁed with implicit waiting Geb will automatically wait for it when it’s requested class DynamicPage extends Page { static content = { dynamicallyAdded(wait: true) { $("p.dynamic") } } }

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Direct Downloading Download content for inspection The download request includes the browser’s cookies def "check user pdf"() { given: to LoginPage login "admin", "password" expect: at AccountPage when: byte[] pdfBytes = downloadBytes($("a.detailsPdf").@href) then: extractTextFromPdf(pdfBytes).contains "Username: admin" } Uses HttpUrlConnection

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Demo ScrapePdfSpec github.com/geb/geb-uberconf-2011-example

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Configuration Geb loads “GebConﬁg.groovy” from the classpath Conﬁgure the driver and other settings import org.openqa.selenium.firefox.FirefoxDriver import org.openqa.selenium.chrome.ChromeDriver driver = { new FirefoxDriver() } // use firefox by default waiting { timeout = 2 // default wait is two seconds } environments { chrome { driver = { new ChromeDriver() } } } Uses Groovy’s ConfigSlurper

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Configuration Environment is controlled by “geb.env” JVM system property grails -Dgeb.env=chrome test-app gradle test -Dgeb.env=chrome