sbt测试由于"Forked test harness failed“而失败

Question

我有一个Scala项目，我正在用sbt构建它。在运行sbt test时，测试本身通过，但是命令失败，并显示"Forked test harness failed: java.io.EOFException“。

build.sbt文件未指定fork in Test。

运行sbt test后失败的错误示例

[info] Run completed in 5 seconds, 494 milliseconds.
[info] Total number of tests run: 1
[info] Suites: completed 0, aborted 0
[info] Tests: succeeded 1, failed 0, canceled 0, ignored 0, pending 0
[info] All tests passed.
[error] Error during tests:
[error]     Forked test harness failed: java.io.EOFException
[error]     at java.io.ObjectInputStream$BlockDataInputStream.peekByte(ObjectInputStream.java:2959)
[error]     at java.io.ObjectInputStream.readObject0(ObjectInputStream.java:1539)
[error]     at java.io.ObjectInputStream.readObject(ObjectInputStream.java:430)
[error]     at sbt.React.react(ForkTests.scala:177)
[error]     at sbt.ForkTests$Acceptor$1$.run(ForkTests.scala:108)
[error]     at java.lang.Thread.run(Thread.java:748)
[error] (serverTests / Test / test) sbt.TestsFailedException: Tests unsuccessful
[error] Total time: 14 s, completed Mar 12, 2020 4:35:26 PM

测试失败的最小示例：

package com.example

import akka.http.scaladsl.testkit.ScalatestRouteTest
import org.scalatest.FreeSpecLike

class ForkedTestHarnessFailedForNoReasonSpec extends FreeSpecLike with ScalatestRouteTest {
  "This test" - {
    "should not fail" in {
      assert("Foo" == "Foo")
    }
  }
}

这个错误表明了什么，应该如何解决它？

Answer 1

在我的案例中，原因是AKKA在协调关闭时关闭了JVM。将以下代码放入您的测试配置中(在我的示例中为src/test/resources/reference.conf)：

akka.coordinated-shutdown.exit-jvm = off