我正在乱搞解析和 scala.tools.nsc.interactive.Global
在 Scala 中,我在 sbt 下执行测试时遇到了问题。测试在 Eclipse 中运行良好,均为 JUnitRunner
和 ScalaTest
插入。在 Google 上花了很长时间后,我不知道如何解决这个问题。
当我执行sbt test
时抛出以下错误:
Exception encountered when attempting to run a suite with class name: compileutils.CompileTest *** ABORTED ***
[info] java.lang.ExceptionInInitializerError:
[info] at compileutils.CompileTest$$anonfun$3.apply$mcV$sp(CompileTest.scala:18)
[info] at compileutils.CompileTest$$anonfun$3.apply(CompileTest.scala:16)
[info] at compileutils.CompileTest$$anonfun$3.apply(CompileTest.scala:16)
[info] at org.scalatest.Transformer$$anonfun$apply$1.apply(Transformer.scala:22)
[info] at org.scalatest.Transformer$$anonfun$apply$1.apply(Transformer.scala:22)
[info] at org.scalatest.OutcomeOf$class.outcomeOf(OutcomeOf.scala:85)
[info] at org.scalatest.OutcomeOf$.outcomeOf(OutcomeOf.scala:104)
[info] at org.scalatest.Transformer.apply(Transformer.scala:22)
[info] at org.scalatest.Transformer.apply(Transformer.scala:20)
[info] at org.scalatest.FunSuiteLike$$anon$1.apply(FunSuiteLike.scala:158)
[info] ...
[info] Cause: scala.reflect.internal.MissingRequirementError: object scala.runtime in compiler mirror not found.
[info] at scala.reflect.internal.MissingRequirementError$.signal(MissingRequirementError.scala:16)
[info] at scala.reflect.internal.MissingRequirementError$.notFound(MissingRequirementError.scala:17)
[info] at scala.reflect.internal.Mirrors$RootsBase.getModuleOrClass(Mirrors.scala:48)
[info] at scala.reflect.internal.Mirrors$RootsBase.getModuleOrClass(Mirrors.scala:40)
[info] at scala.reflect.internal.Mirrors$RootsBase.getModuleOrClass(Mirrors.scala:61)
[info] at scala.reflect.internal.Mirrors$RootsBase.getPackage(Mirrors.scala:172)
[info] at scala.reflect.internal.Mirrors$RootsBase.getRequiredPackage(Mirrors.scala:175)
[info] at scala.reflect.internal.Definitions$DefinitionsClass.RuntimePackage$lzycompute(Definitions.scala:183)
[info] at scala.reflect.internal.Definitions$DefinitionsClass.RuntimePackage(Definitions.scala:183)
[info] at scala.reflect.internal.Definitions$DefinitionsClass.RuntimePackageClass$lzycompute(Definitions.scala:184)
[info] ...
被测类
package compileutils
import scala.tools.nsc.Settings
import scala.tools.nsc.interactive.Global
import scala.tools.nsc.reporters.ConsoleReporter
import scala.tools.nsc.interactive.Response
import scala.io.Source
import scala.reflect.internal.util.SourceFile
import scala.reflect.internal.util.BatchSourceFile
import scala.reflect.io.AbstractFile
import java.io.File
object Compile {
val settings = new Settings
val reporter = new ConsoleReporter(settings)
val global = new Global(settings, reporter, "Study compile")
def parse(source: String): Compile.this.global.Tree = {
val sourceFile = new BatchSourceFile(".", source)
global.askReload(List(sourceFile), new Response[Unit])
global.parseTree(sourceFile)
}
def loadTypes(source: String): Either[Compile.this.global.Tree, Throwable] = {
val sourceFile = new BatchSourceFile(".", source)
val tResponse = new Response[global.Tree]
global.askReload(List(sourceFile), new Response[Unit])
global.askLoadedTyped(sourceFile, tResponse)
tResponse.get
}
}
测试
package compileutils
import org.scalatest.BeforeAndAfter
import org.junit.runner.RunWith
import org.scalatest.junit.JUnitRunner
import org.scalatest.FunSuite
import org.scalatest.Matchers._
@RunWith(classOf[JUnitRunner])
class CompileTest extends FunSuite with BeforeAndAfter {
val testSource = "class FromString {val s = \"dsasdsad \"}"
before {}
after {}
test("parse") {
//when
val tree = Compile.parse(testSource)
//then
tree should not be null
}
test("typer") {
//when
val typ = Compile.loadTypes(testSource)
//then
typ should be('left)
}
}
build.sbt
name := "Compiler study"
version := "0.1"
val scalaBuildVersion = "2.10.3"
scalaVersion := scalaBuildVersion
libraryDependencies += "org.scala-lang" % "scala-compiler" % scalaBuildVersion
libraryDependencies += "org.scala-lang" % "scala-library" % scalaBuildVersion
libraryDependencies += "org.scala-lang" % "scala-reflect" % scalaBuildVersion
libraryDependencies += "org.scalatest" %% "scalatest" % "2.1.0" % "test"
libraryDependencies += "junit" % "junit" % "4.11" % "test"
环境:
sbt launcher version 0.13.0
Scala compiler version 2.10.3 -- Copyright 2002-2013, LAMP/EPFL
javac 1.6.0_45
DISTRIB_ID=Ubuntu
DISTRIB_RELEASE=13.10
DISTRIB_CODENAME=saucy
DISTRIB_DESCRIPTION="Ubuntu 13.10"
最佳答案
运行 sbt 时,scala jar 似乎不在您的类路径中 - 请确保在运行 sbt 之前将 scala-library.jar 添加到您的类路径中。
根据您的评论之一,您似乎正在 Windows 上运行。如果类路径包含奇怪的字符或空格,或者权限错误(例如,如果 eclipse 在管理员帐户下运行,而 sbt 不是),那么您可能还会遇到运行时 jar 访问错误。
尝试重新排序您的依赖项列表,将 scala-library 放在 scala-compiler 之前。如果这不起作用,请尝试故障排除建议 here .
关于scala - Eclipse 中的测试有效,但 sbt 抛出 MissingRequirementError : object scala. 编译器镜像中未找到运行时,我们在Stack Overflow上找到一个类似的问题: https://stackoverflow.com/questions/22668012/