由于“分叉测试工具失败”，sbt 测试失败

Question

我有一个 Scala 项目，我正在用sbt. 运行时sbt test，测试本身通过，但随后命令失败并显示“分叉测试工具失败：java.io.EOFException”。

build.sbt 文件未指定fork in Test.

运行后失败的错误示例sbt test：

[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

失败的最小测试示例：

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")
    }
  }
}

此错误表明什么以及应该如何解决它？

Answer 1

就我而言，原因是 AKKA 在协调关闭时关闭了 JVM。把它放到你的测试配置中（src/test/resources/reference.conf在我的例子中）：

akka.coordinated-shutdown.exit-jvm = off