java.lang.IncompatibleClassChangeError:使用ScalaCheck和ScalaTest实现类

本文介绍了java.lang.IncompatibleClassChangeError:使用ScalaCheck和ScalaTest实现类的处理方法，对大家解决问题具有一定的参考价值，需要的朋友们下面随着小编来一起学习吧！ 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.URLClassLoader.defineClass(URLClassLoader.java:467) at java.URLClassLoader.access$100(URLClassLoader.java:73) at java.URLClassLoader$1.run(URLClassLoader.java:368) at java.URLClassLoader$1.run(URLClassLoader.java:362) at java.security.AccessController.doPrivileged(Native Method) at java.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.URLClassLoader.defineClass(URLClassLoader.java:467) at java.URLClassLoader.access$100(URLClassLoader.java:73) at java.URLClassLoader$1.run(URLClassLoader.java:368) at java.URLClassLoader$1.run(URLClassLoader.java:362) at java.security.AccessController.doPrivileged(Native Method) at java.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 github/rickynils/scalacheck/issues/217 .该问题已通过以下解决方法解决:

This was reported as github/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 github/scalatest/scalatest/blob/master/project/scalatest.scala#L134 ).因此，不能保证您可以简单地将ScalaCheck 1.12.x换成1.13.y. ScalaCheck仅维护同一次要版本系列(1.12.1、1.12.2、1.12.3等)内的二进制兼容性.

All current releases of ScalaTest (2.2.6, 3.0.0 etc) are built against ScalaCheck 1.12.1 (see github/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).