Scala提升JUnit測試失敗，出現「error：not found：type foo」使用mvn測試

想對maven-lift-eclipse原型生成的默認Lift片段類進行簡單的單元測試。Scala提升JUnit測試失敗，出現「error：not found：type foo」使用mvn測試

我把它叫做HelloWorld.scala（在project/src/main/scala/my/namespace/helloworld/snippet/HelloWorld.scala）

package my.namespace.helloworld { 
package snippet { 

import _root_.scala.xml.NodeSeq 
import _root_.net.liftweb.util.Helpers 
import _root_.java.util.Date 
import Helpers._ 

class HelloWorld { 
    def howdy(in: NodeSeq): NodeSeq = 
    Helpers.bind("b", in, "time" -> (new Date).toString) 
}}}

，所以我說添加了一個新的測試，testHowdy，在默認生成AppTest.scala（在project/src/test/scala/my/namespace/AppTest.scala）

package my.namespace 

import _root_.java.io.File 
import _root_.junit.framework._ 
import Assert._ 
import _root_.scala.xml.XML 
import _root_.net.liftweb.util._ 
import _root_.net.liftweb.common._ 
import my.namespace._ 

object AppTest { 
    def suite: Test = { 
    val suite = new TestSuite(classOf[AppTest]) 
    suite 
    } 

    def main(args : Array[String]) { 
    _root_.junit.textui.TestRunner.run(suite) 
    } 
} 

/** 
* Unit test for simple App. 
*/ 
class AppTest extends TestCase("app") { 

    /** 
    * Rigourous Tests :-) 
    */ 
    def testOK() = assertTrue(true) 
    // def testKO() = assertTrue(false); 

    def testHowdy() = { 
     val h = new HelloWorld() 
     assertFalse(h.howdy("<!DOCTYPE html><title></title><p><b:time></p>") contains "") 
    } 

    def testXml() = { 
    <snip> 
    } 
}

有了這額外的測試，我生成編譯錯誤$ mvn test：

[INFO] Scanning for projects... 
[INFO] ------------------------------------------------------------------------ 
[INFO] Building helloworld Project 
[INFO] task-segment: [test] 
[INFO] ------------------------------------------------------------------------ 
[INFO] [resources:resources {execution: default-resources}] 
[INFO] Using 'UTF-8' encoding to copy filtered resources. 
[INFO] Copying 0 resource 
[INFO] [resources:copy-resources {execution: default-copy-resources}] 
[INFO] Using 'UTF-8' encoding to copy filtered resources. 
[INFO] Copying 1 resource 
[INFO] [yuicompressor:compress {execution: default}] 
[INFO] nb warnings: 0, nb errors: 0 
[INFO] [compiler:compile {execution: default-compile}] 
[INFO] Nothing to compile - all classes are up to date 
[INFO] [scala:compile {execution: default}] 
[INFO] Checking for multiple versions of scala 
[INFO] includes = [**/*.scala,**/*.java,] 
[INFO] excludes = [] 
[INFO] Nothing to compile - all classes are up to date 
[INFO] [resources:testResources {execution: default-testResources}] 
[INFO] Using 'UTF-8' encoding to copy filtered resources. 
[INFO] Copying 0 resource 
[INFO] [compiler:testCompile {execution: default-testCompile}] 
[INFO] Nothing to compile - all classes are up to date 
[INFO] [scala:testCompile {execution: default}] 
[INFO] Checking for multiple versions of scala 
[INFO] includes = [**/*.scala,**/*.java,] 
[INFO] excludes = [] 
[INFO] /home/noel/workspace/helloworld/src/test/scala:-1: info: compiling 
[INFO] Compiling 2 source files to /home/noel/workspace/helloworld/target/test-classes at 1301433670806 
[ERROR] /home/noel/workspace/helloworld/src/test/scala/my/namespace/helloworld/AppTest.scala:34: error: not found: type HelloWorld 
[INFO] val h = new HelloWorld() 
[INFO]      ^
[ERROR] one error found 
[INFO] ------------------------------------------------------------------------ 
[ERROR] BUILD ERROR 
[INFO] ------------------------------------------------------------------------ 
[INFO] wrap: org.apache.commons.exec.ExecuteException: Process exited with an error: 1(Exit value: 1) 

[INFO] ------------------------------------------------------------------------ 
[INFO] For more information, run Maven with the -e switch 
[INFO] ------------------------------------------------------------------------ 
[INFO] Total time: 14 seconds 
[INFO] Finished at: Tue Mar 29 16:21:18 CDT 2011 
[INFO] Final Memory: 25M/61M 
[INFO] ------------------------------------------------------------------------

這看起來像是某種簡單的命名空間問題，但我無法追查到我輸入錯誤的地方！

注意：默認生成的AppTest.scala確實運行成功。它在我的額外測試後纔開始編譯失敗。

來源

2011-03-29 Noel

我似乎無法找到你這樣做意味着任何進口...

import my.namespace.helloworld.snippet.HelloWorld

來源

2011-03-29 22:32:33 thoredge

這可能反映了我import'的'無知，但不會'進口my.namespace._'照顧那個？ – Noel 2011-03-30 14:51:23

當然不是。我沒有在名稱空間文檔中看到任何提及的導入匹配深度。「_」實際上做了什麼？ – Noel 2011-03-30 14:55:11

_只匹配一個實體級別（class/trait/object/package）。所以你也可以這樣寫：「import my.namespace.helloworld.snippet._」 – thoredge 2011-03-30 19:14:40

Scala提升JUnit測試失敗，出現「error：not found：type foo」使用mvn測試

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