最终不会在第一个失败的断言上尝试第二个断言

问题描述

下面是一个简化的代码，用于理解最终是如何工作的。但它只尝试断言一次，最终不会尝试第二次断言。

package whisk_main

import org.scalatest.concurrent.Eventually.eventually
import org.scalatest.concurrent.Waiters.{interval,timeout}
import org.scalatest.flatspec.AsyncFlatSpecLike
import org.scalatest.matchers.should.Matchers
import org.scalatest.time.{Millis,Seconds,Span}

class EventuallySpec extends AsyncFlatSpecLike with Matchers{

  "eventually" should "work,as expected" in {

    val runnable = new Runnable {
      override def run(): Unit = {
        val currentThread = Thread.currentThread()
        println(s"$currentThread starts here")
        Thread.sleep(5000)
        println(s"$currentThread ends here")
      }
    }

    val threadThatSleepsForFiveSeconds = new Thread(runnable)

    threadThatSleepsForFiveSeconds.start()

    eventually(timeout(Span(15,Seconds)),interval(Span(2,Millis))) {
      println("asserting thread state")
      threadThatSleepsForFiveSeconds.getState should be(Thread.State.TERMINATED)
    }
  }
}

以下是异常跟踪：-

Thread[Thread-1,5,main] starts here
asserting thread state





TIMED_WAITING was not equal to TERMINATED
ScalaTestFailureLocation: whisk_main.EventuallySpec at (EventuallySpec.scala:28)
Expected :TERMINATED
Actual   :TIMED_WAITING
<Click to see difference>

org.scalatest.exceptions.TestFailedException: TIMED_WAITING was not equal to TERMINATED
    at org.scalatest.matchers.MatchersHelper$.indicateFailure(MatchersHelper.scala:344)
    at org.scalatest.matchers.should.Matchers$ShouldMethodHelperClass.shouldMatcher(Matchers.scala:6778)
    at org.scalatest.matchers.should.Matchers$AnyShouldWrapper.should(Matchers.scala:6822)
    at whisk_main.EventuallySpec.$anonfun$new$2(EventuallySpec.scala:28)

我也尝试了以下示例，该示例也记录在 http://doc.scalatest.org/1.8/org/scalatest/concurrent/Eventually.html :-

val xs = 1 to 125
val it = xs.iterator
eventually { it.next should be (3) }

上面的例子也失败了，下面的例子：-

1 was not equal to 3
ScalaTestFailureLocation: whisk_main.EventuallyExample at (EventuallyExample.scala:12)
Expected :3
Actual   :1
<Click to see difference>

org.scalatest.exceptions.TestFailedException: 1 was not equal to 3
    at org.scalatest.matchers.MatchersHelper$.indicateFailure(MatchersHelper.scala:344)
    at org.scalatest.matchers.should.Matchers$ShouldMethodHelperClass.shouldMatcher(Matchers.scala:6778)
    at org.scalatest.matchers.should.Matchers$AnyShouldWrapper.should(Matchers.scala:6822)
    at whisk_main.EventuallyExample.$anonfun$new$2(EventuallyExample.scala:12)

请提出建议，为什么最终在成功之前不起作用。

解决方法

暂无找到可以解决该程序问题的有效方法，小编努力寻找整理中！

如果你已经找到好的解决方法，欢迎将解决方案带上本链接一起发送给小编。

小编邮箱:dio#foxmail.com (将#修改为@）

scala scalatest