java.lang.IncompatibleClassChangeError:使用ScalaCheck和ScalaTest实现类 [英] java.lang.IncompatibleClassChangeError: Implementing class with ScalaCheck and ScalaTest

问题描述

当尝试使用ScalaCheck和ScalaTest编写测试时，我遇到了一个令人讨厌的异常.这是我的依赖项:

I'm facing a nasty exception when trying to write a test using ScalaCheck and ScalaTest. Here's my dependencies:

libraryDependencies ++= Seq(
  "org.scalatest" %% "scalatest" % "2.2.6" % "test",
  "org.scalacheck" %% "scalacheck" % "1.13.0" % "test"
) 

这是我的考试:

import org.scalatest.PropSpec
import org.scalatest.prop.Checkers

class MyPropSpec extends PropSpec with Checkers {

  property("List.concat") {
    check((a: List[Int], b: List[Int]) => a.size + b.size == (a ::: b).size)
  }
}

当我尝试运行此程序时，我会得到:

When I try to run this I'm getting:

DeferredAbortedSuite:
 Exception encountered when attempting to run a suite with class name:      org.scalatest.DeferredAbortedSuite *** ABORTED ***
     java.lang.IncompatibleClassChangeError: Implementing class
     at java.lang.ClassLoader.defineClass1(Native Method)
     at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
     at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
     at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
     at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
     at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
     at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
     ...
     java.lang.IncompatibleClassChangeError: Implementing class
     at java.lang.ClassLoader.defineClass1(Native Method)
     at java.lang.ClassLoader.defineClass(ClassLoader.java:760)
     at java.security.SecureClassLoader.defineClass(SecureClassLoader.java:142)
     at java.net.URLClassLoader.defineClass(URLClassLoader.java:467)
     at java.net.URLClassLoader.access$100(URLClassLoader.java:73)
     at java.net.URLClassLoader$1.run(URLClassLoader.java:368)
     at java.net.URLClassLoader$1.run(URLClassLoader.java:362)
     at java.security.AccessController.doPrivileged(Native Method)
     at java.net.URLClassLoader.findClass(URLClassLoader.java:361)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:424)
     at java.lang.ClassLoader.loadClass(ClassLoader.java:357)
     ...

我在这里想念什么?

推荐答案

ScalaTest 2.2.6与ScalaCheck 1.13.0不兼容.降级为"scalacheck"％"1.12.5"会有所帮助.

ScalaTest 2.2.6 is incompatible with ScalaCheck 1.13.0. Downgrading to "scalacheck" % "1.12.5" helps.

这被报告为 https://github.com/rickynils/scalacheck/issues/217 .该问题已通过以下解决方法解决:

This was reported as https://github.com/rickynils/scalacheck/issues/217. The issue is closed with following resolution:

所有当前版本的ScalaTest(2.2.6、3.0.0等)都是根据ScalaCheck 1.12.1构建的(请参见

All current releases of ScalaTest (2.2.6, 3.0.0 etc) are built against ScalaCheck 1.12.1 (see https://github.com/scalatest/scalatest/blob/master/project/scalatest.scala#L134). Therefore, there are no guarantees that you can simply swap out ScalaCheck 1.12.x for 1.13.y. ScalaCheck only maintains binary compatibility within the same minor version series (1.12.1, 1.12.2, 1.12.3 etc).

这篇关于java.lang.IncompatibleClassChangeError:使用ScalaCheck和ScalaTest实现类的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！