Question

我是scala的新手。以下与我的问题相关的4个类存在于Scala中设计的测试自动化框架中。是否可以访问对象（LoginPage）的成员（日，月，年），如果它作为其超类（PageObject）的实例传递给方法，并且超类不包含这些成员

trait PageObject {
  val rootUrl = "http://localhost:9999/basic-page"
  val back = "backLink"
  val submit = "submit"
  val url: String
  val heading: String
}


object LoginPage extends PageObject {
  val url =s"$rootUrl/login-page"
  val heading = "Heading heading"
  val day = "login_page_day"
  val month = "login_page__month"
  val year = "login_page__year"
}


import LoginPage
object Main {
   def main(args: Array[String]) {
    val date = "15 August 2017"
    enterDateOnPage(date, LoginPage)
   }
 }

<current way>
class DateMethods {    
  def enterDateOnPage(date: String, page: PageObject) {
    val arr = date.split(" ")
    val cal = Calendar.getInstance()
    cal.setTime(new SimpleDateFormat("MMMM").parse(arr(1)))
    numberField(LoginPage.day).value = arr(0)
    numberField(LoginPage.month).value = (cal.get(Calendar.MONTH) + 1).toString
    numberField(LoginPage.year).value = arr(2)
    click on name(LoginPage.submit)
  }
}

<preferred way>
class DateMethods {    
      def enterDateOnPage(date: String, page: PageObject) {
        val arr = date.split(" ")
        val cal = Calendar.getInstance()
        cal.setTime(new SimpleDateFormat("MMMM").parse(arr(1)))
        numberField(page.day).value = arr(0)
        numberField(page.month).value = (cal.get(Calendar.MONTH) + 1).toString
        numberField(page.year).value = arr(2)
        click on name(page.submit)
      }
    }

＆＃39; LoginPage.day＆＃39;而这些喜欢被＆＃39; page.day＆＃39;取代确认pageMatch实际上是否返回了LoginPage？

我确实根据Samuel Heaney的回答尝试了这样的事情，但它不会编译

def enterDateOnPage(date: String, page: PageObject) {
    val npage = getPage(page)

    val arr = date.split(" ")
    val cal = Calendar.getInstance()
    cal.setTime(new SimpleDateFormat("MMMM").parse(arr(1)))

    numberField(npage.day).value = arr(0)
    numberField(npage.month).value = (cal.get(Calendar.MONTH) + 1).toString
    numberField(npage.year).value = arr(2)
    click on name(npage.submit)


  }

  def getPage(page:PageObject)={
    page match{
      case _:LoginPage.type => LoginPage
      case _:EntryFormPage.type => EntryFormPage
    }

只有在我添加日，月和年作为PageObject特征的成员时才有效，但这对我来说不是一个可行的选择

Answer 1

您可以使用模式匹配来测试它是否为LoginPage。

class DateMethods {    
  def enterDateOnPage(date: String, page: PageObject): Unit = {
    page match {
      case LoginPage =>
        setUIFields(
          LoginPage.day,
          LoginPage.month,
          LoginPage.year,
          date
        )
      case LogoutPage =>
        setUIFields(...)
      case EntryFormPage =>
        setUIFields(...)
    }
    click on name(page.submit)
  }

  def setUIFields(
    day: String,
    month: String,
    year: String,
    date: String
  ): Unit = {
    val arr = date.split(" ")
    val cal = Calendar.getInstance()
    cal.setTime(new SimpleDateFormat("MMMM").parse(arr(1)))
    numberField(day).value = arr(0)
    numberField(month).value = (cal.get(Calendar.MONTH) + 1).toString
    numberField(year).value = arr(2)
  }
}

Answer 2

将日期逻辑拉入自己的特征并与之匹配。

trait Dates {
  val day: String
  val month: String
  val year: String
}

case object LoginPage extends PageObject with Dates {
  val day = ""
  val month = ""
  val year = ""
  // additional code
}

现在你的功能可以特别匹配

def enterDateOnPage(date: String, page: PageObject) {
  page match {
    case datePage: Dates => {
      // add log to validate date fields
    }
    case _ => // no-op
  }

  // additional code
}

当对象作为其超类的实例/类型传递给方法时，访问对象的独占成员

2 个答案: