我是Scala的新手，我正在尝试一些示例代码进行测试。但是，当我运行测试代码时，我遇到了一些问题。当我运行测试时，我得到了一个错误。

[trace] Stack trace suppressed: run last test:executeTests for the full output.
[error] (test:executeTests) java.lang.NoClassDefFoundError: scala/Product$class
[error] Total time: 3 s, completed Feb 27, 2017 6:57:15 PM

字符串
我的代码如下
FilterChecks.scala

class filterChecks extends FlatSpec {

  "Filter checker passed a filename which is present in directory" should "return file name" in {
    val matchingFileName = new FileObject("match")
    val listOfFiles = List(new FileObject("random"), matchingFileName)
    val matchedFiles = new FilterChecker("match").findMatchedFiles(listOfFiles)
    assert(matchedFiles == List(matchingFileName))

  }
}

型
过滤器类

class FilterChecker(filter : String) {

  def matches(content : String) = content.contains(filter);

  def findMatchedFiles(fileObjects : List[FileObject]) = {
    for(fileObject <- fileObjects if(matches(fileObject.name)))
      yield fileObject
  }

}

型
FileObject

class FileObject(val name: String) {

}

型
构建文件如下：

name := "testScalaProject"

version := "1.0"

scalaVersion := "2.12.1"

// https://mvnrepository.com/artifact/org.scala-js/scalajs-test-interface_2.12
libraryDependencies ++= Seq("org.scala-js" % "scalajs-test-interface_2.12" % "0.6.14",
  "org.scalatest" % "scalatest_2.11" % "2.2.5",
  "com.novocode" % "junit-interface" % "0.11",
  "org.scala-lang" % "scala-library" % "2.12.1")

型
有人能帮我找到这个问题吗？提前感谢。