scala使用FunSpec进行单元测试报错

遇到比较奇怪的问题，mvn项目中的main函数可以正常运行，但是test阶段出错，报错信息如下：

Exception in thread "main" java.lang.NoClassDefFoundError: scala/ScalaObject

    at java.lang.ClassLoader.defineClass1(Native Method)

    at java.lang.ClassLoader.defineClassCond(Unknown Source)

    at java.lang.ClassLoader.defineClass(Unknown Source)

    at java.security.SecureClassLoader.defineClass(Unknown Source)

    at java.net.URLClassLoader.defineClass(Unknown Source)

    at java.net.URLClassLoader.access$(Unknown Source)

    at java.net.URLClassLoader$.run(Unknown Source)

    at java.security.AccessController.doPrivileged(Native Method)

    at java.net.URLClassLoader.findClass(Unknown Source)

    at java.lang.ClassLoader.loadClass(Unknown Source)

    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)

    at java.lang.ClassLoader.loadClass(Unknown Source)

    at learning_scala.java.Main.main(Main.java:)

Caused by: java.lang.ClassNotFoundException: scala.ScalaObject

    at java.net.URLClassLoader$.run(Unknown Source)

    at java.security.AccessController.doPrivileged(Native Method)

    at java.net.URLClassLoader.findClass(Unknown Source)

    at java.lang.ClassLoader.loadClass(Unknown Source)

    at sun.misc.Launcher$AppClassLoader.loadClass(Unknown Source)

    at java.lang.ClassLoader.loadClass(Unknown Source)

test代码如下：

class Sampling$Test extends FunSpec{

  describe("Sampling Test"){

    val spark = SparkSession

      .builder()

      .master("local")

      .getOrCreate()

    println("......")

    it("should run without exeption."){

      val array: Array[String] = Array("down", "xxx", "xxx", "xxx", "xxx")

      Sampling.main(array)

    }

  }

}

解决方法：

将 scala-library.jar 的路径加入到 CLASSPATH 中（参考：https://stackoverflow.com/questions/7781547/noclassdeffounderror-scala-scalaobject-in-mixed-scala-java-project），但是又报了如下错误：

Error:scalac: error while loading Suite, Scala signature Suite has wrong version

 expected: 5.0

 found: 4.1 in Suite.class

是scala和单元测试包不匹配造成的，将org.specs包更新到最新，问题解决：

<dependency>

      <groupId>org.specs</groupId>

      <artifactId>specs</artifactId>

      <version>1.4.</version>

      <scope>test</scope>

</dependency>

巴特西

scala使用FunSpec进行单元测试报错

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