Scala测试1.2的简单测试
Scala测试1.2的简单测试
提问于 2011-02-06 14:28:08
我试图使用IntelliJ 10中的Scala2.8和ScalaTest1.2运行一个测试
我不太懂scala语法，所以你能帮上忙吗？:)
package test.ui {
import org.scalatest._
import matchers.ShouldMatchers
import ui._
import observer._
object ButtonObserverSpecification extends Spec {
"A Button Observer should observe button clicks" in {
val observableButton = new ObservableButton("Okay")
val buttonObserver = new ButtonCountObserver
observableButton.addObserver(buttonObserver)
for (i <- 1 to 3) observableButton.click()
buttonObserver.count should equal (3)
}
}
}错误是:
error: value in is not a member of java.lang.String
"A Button Observer should observe button clicks" in {下面是代码的其余部分：
package ui {
abstract class Widget
class Button(val label: String) extends Widget {
def click() = {
println (label + " was clicked")
}
}
}
package observer {
trait Subject {
type Observer = {def receiveUpdate(subject: Any)}
private var observers = List[Observer]()
def addObserver(observer: Observer) = observers ::= observer
def notifyObservers = observers foreach (_.receiveUpdate(this))
}
}
package ui {
import observer._
class ObservableButton(name: String) extends Button(name) with Subject {
override def click() = {
super.click()
notifyObservers
}
}
class ButtonCountObserver {
var count = 0
def receiveUpdate(subject: Any) = count += 1
}
}代码来自Oreilly的“编程Scala”一书。
我尝试将代码更新到Scala测试1.2，但失败了。下面是原始测试(注意导入和扩展类)：
package ui
import org.specs._
import observer._
object ButtonObserverSpec extends Specification {
"A Button Observer" should {
"observe button clicks" in {
val observableButton = new ObservableButton("Okay")
val buttonObserver = new ButtonCountObserver
observableButton.addObserver(buttonObserver)
for (i <- 1 to 3) observableButton.click()
buttonObserver.count mustEqual 3
}
}
}试用编号3 (没有发现测试错误)：
package test.ui {
import org.scalatest._
import matchers.ShouldMatchers
import ui._
import observer._
import org.scalatest.junit.JUnitRunner
import org.junit.runner.RunWith
@RunWith(classOf[JUnitRunner])
object ButtonObserverTest extends WordSpec with ShouldMatchers {
"A Button Observer" should {
"observe button clicks" in {
val observableButton = new ObservableButton("Okay")
val buttonObserver = new ButtonCountObserver
observableButton.addObserver(buttonObserver)
for (i <- 1 to 3) observableButton.click()
buttonObserver.count should equal (3)
}
}
}
}工作测试:
package test.ui {
import org.scalatest.WordSpec
import org.scalatest.matchers.ShouldMatchers
import ui._
import observer._
class ButtonObserverTest extends WordSpec with ShouldMatchers {
"A Button Observer" should {
"observe button clicks" in {
val observableButton = new ObservableButton("Okay")
val buttonObserver = new ButtonCountObserver
observableButton.addObserver(buttonObserver)
for (i <- 1 to 3) observableButton.click()
buttonObserver.count should equal (3)
}
}
}
}PS :如果您不知道如何在IntelliJ中运行scala测试，请参阅这个博客帖子- IntelliJ现在支持ScalaTest
回答 1
Stack Overflow用户
回答已采纳
发布于 2011-02-06 15:06:43
我认为您需要像这样用WordSpec扩展ShouldMatchers：
class ButtonObserverSpec extends WordSpec with ShouldMatchers {...}您可以在这里找到更多的例子：
bdd
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原文链接：
https://stackoverflow.com/questions/4913867
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