在 Play 框架规范中对 PhantomJSDriver 设置 Accept-Language

Question

如何在 Play Framework 2.2 规范中为 PhantomJSDriver 配置特定的 Accept-Language 语言标头？

鉴于此代码：

import org.specs2.mutable._
import org.specs2.runner._
import org.junit.runner._
import play.api.i18n._
import play.api.test._
import play.api.test.Helpers._
import org.openqa.selenium.phantomjs.PhantomJSDriver

@RunWith(classOf[JUnitRunner])
class IntegrationSpec extends Specification {

  "Application" should {

    "work from within a browser" in new WithBrowser(webDriver = classOf[PhantomJSDriver]) {
      browser.goTo("http://localhost:" + port)
      implicit val lang = Lang("pt-BR")
      val expected = Messages("home.index.featured_lead")
      browser.pageSource must contain(expected)
    }
  }
}

如何确保goTO 生成的请求将使用特定的Accept-Language 标头发送，例如pt-BR?

更新：问题的目的是能够在模拟浏览器（例如 PhantomJS）中运行测试，并且浏览器配置为特定语言。上面的代码示例只是要求浏览器检测页面中是否存在一些本地化的文本，但是可以在模拟浏览器中运行的测试种类有很大差异。例如，文本可能在运行时通过 JavaScript 设置。或者我可能想要截取屏幕截图并将其与之前的参考屏幕截图进行比较，以测试布局。默认情况下，显然浏览器正在使用机器的语言环境，这会破坏持续集成测试。所以问题是如何从 Play Framework 测试中配置 PhantomJS。

Answer 1

基于a forum message by Yasuki Okumura，这可以通过从预配置的驱动程序创建TestBrowser 对象来完成。

例如：

在文件WithPhantomJS.scala：

package com.myproject.website.tests

import org.openqa.selenium.remote.DesiredCapabilities
import org.openqa.selenium.phantomjs.PhantomJSDriver
import org.openqa.selenium.phantomjs.PhantomJSDriverService
import org.specs2.execute.AsResult
import org.specs2.execute.Result
import org.specs2.mutable.Around
import org.specs2.specification.Scope
import play.api.i18n.Lang
import play.api.test.Helpers._
import play.api.test.FakeApplication
import play.api.test.TestBrowser
import play.api.test.TestServer
import scala.collection.JavaConverters._

abstract class WithPhantomJS(val additionalOptions: Map[String, String] = Map()) extends Around with Scope {

  implicit def app = FakeApplication()

  implicit def port = play.api.test.Helpers.testServerPort

  lazy val browser: TestBrowser = {
    val defaultCapabilities = DesiredCapabilities.phantomjs
    val additionalCapabilities = new DesiredCapabilities(additionalOptions.asJava)
    val capabilities = new DesiredCapabilities(defaultCapabilities, additionalCapabilities)
    val driver = new PhantomJSDriver(capabilities)
    TestBrowser(driver, Some("http://localhost:" + port))
  }

  override def around[T: AsResult](body: => T): Result = {
    try {
      running(TestServer(port, app))(AsResult.effectively(body))
    } finally {
      browser.quit()
    }
  }
}

在文件IntegrationSpec.scala：

package com.myproject.website.tests

import com.myproject.common.helpers._
import org.junit.runner._
import org.specs2.runner._
import play.api.i18n._
import play.api.test._
import play.api.test.Helpers._
import org.specs2.mutable.Specification
import org.openqa.selenium.phantomjs.PhantomJSDriverService

/**
 * An integration test will fire up a whole play application in a real (or headless) browser.
 */
@RunWith(classOf[JUnitRunner])
class IntegrationSpec extends Specification {

  val enUSLangCode = "en-US"
  val ptBRLangCode = "pt-BR"

  val enUSOptions = getPhantomJSLanguageOption(enUSLangCode)
  val ptBROptions = getPhantomJSLanguageOption(ptBRLangCode)

  "Application" should {

    "work from within a browser with en-US language" in new WithPhantomJS(enUSOptions) {
      browser.goTo("http://localhost:" + port)
      implicit val lang = Lang(enUSLangCode)
      val expected = Messages("home.index.featured_lead")
      browser.pageSource must contain(expected)
    }

    "work from within a browser with pt-BR language" in new WithPhantomJS(ptBROptions) {
      browser.goTo("http://localhost:" + port)
      implicit val lang = Lang(ptBRLangCode)
      val expected = Messages("home.index.featured_lead")
      browser.pageSource must contain(expected)
    }

  }

  private def getPhantomJSLanguageOption(langCode: String) =
    Map(PhantomJSDriverService.PHANTOMJS_PAGE_CUSTOMHEADERS_PREFIX + "Accept-Language" -> langCode)

}

另外，build.sbt 中需要此依赖项：

libraryDependencies += "com.github.detro.ghostdriver" % "phantomjsdriver" % "1.0.4" % "test"

在 Play Framework 2.3 中，WithBrowser 类 will accept 直接是 WebDriver 实例。

Answer 2

根据this 在有关读取响应标头的问题中的评论，WebDriver 似乎没有用于设置请求标头或检查响应标头的 API。该评论建议使用 HTTP 客户端（Play 有 WS Library）来测试请求和响应标头。

鉴于该信息，您可以使用 WS 库来检查服务器是否使用与 Accept-Language 标头对应的语言进行响应，并且您所做的任何前端测试都可以假定标头得到了正确的尊重。