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    copied!<p>If you want to just test Java code from Scala then it is quite easy to set up such a maven project. Since I am not an eclipse user I am not sure how it works with eclipse. I have tested with IntelliJ and it works very well. Shouldn't be any problems with eclipse either.</p> <p>I created a simple <code>pom.xml</code> that just uses the scala compiler for the tests and uses the normal java compiler for the main java code.</p> <p><code>pom.xml</code></p> <p></p> <pre><code>&lt;project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"&gt; &lt;modelVersion&gt;4.0.0&lt;/modelVersion&gt; &lt;groupId&gt;com.stackoverflow.Q13379591&lt;/groupId&gt; &lt;artifactId&gt;Q13379591&lt;/artifactId&gt; &lt;version&gt;1.0-SNAPSHOT&lt;/version&gt; &lt;name&gt;${project.artifactId}-${project.version}&lt;/name&gt; &lt;properties&gt; &lt;project.build.sourceEncoding&gt;UTF-8&lt;/project.build.sourceEncoding&gt; &lt;scala.version&gt;2.9.2&lt;/scala.version&gt; &lt;/properties&gt; &lt;dependencies&gt; &lt;dependency&gt; &lt;groupId&gt;org.scala-lang&lt;/groupId&gt; &lt;artifactId&gt;scala-library&lt;/artifactId&gt; &lt;version&gt;${scala.version}&lt;/version&gt; &lt;/dependency&gt; &lt;dependency&gt; &lt;groupId&gt;org.scalatest&lt;/groupId&gt; &lt;artifactId&gt;scalatest_${scala.version}&lt;/artifactId&gt; &lt;version&gt;2.0.M4&lt;/version&gt; &lt;scope&gt;test&lt;/scope&gt; &lt;/dependency&gt; &lt;/dependencies&gt; &lt;build&gt; &lt;plugins&gt; &lt;plugin&gt; &lt;groupId&gt;org.scala-tools&lt;/groupId&gt; &lt;artifactId&gt;maven-scala-plugin&lt;/artifactId&gt; &lt;version&gt;2.15.2&lt;/version&gt; &lt;executions&gt; &lt;execution&gt; &lt;id&gt;scala-test-compile&lt;/id&gt; &lt;phase&gt;test-compile&lt;/phase&gt; &lt;goals&gt; &lt;goal&gt;testCompile&lt;/goal&gt; &lt;/goals&gt; &lt;/execution&gt; &lt;/executions&gt; &lt;configuration&gt; &lt;args&gt; &lt;arg&gt;-g:vars&lt;/arg&gt; &lt;arg&gt;-make:transitive&lt;/arg&gt; &lt;arg&gt;-dependencyfile&lt;/arg&gt; &lt;arg&gt;${project.build.directory}/.scala_dependencies&lt;/arg&gt; &lt;/args&gt; &lt;/configuration&gt; &lt;/plugin&gt; &lt;plugin&gt; &lt;groupId&gt;org.scalatest&lt;/groupId&gt; &lt;artifactId&gt;scalatest-maven-plugin&lt;/artifactId&gt; &lt;version&gt;1.0-M2&lt;/version&gt; &lt;configuration&gt; &lt;reportsDirectory&gt;${project.build.directory}/surefire-reports&lt;/reportsDirectory&gt; &lt;junitxml&gt;.&lt;/junitxml&gt; &lt;filereports&gt;WDF TestSuite.txt&lt;/filereports&gt; &lt;stdout&gt;W&lt;/stdout&gt; &lt;!-- Skip coloring output --&gt; &lt;/configuration&gt; &lt;executions&gt; &lt;execution&gt; &lt;id&gt;scala-test&lt;/id&gt; &lt;goals&gt; &lt;goal&gt;test&lt;/goal&gt; &lt;/goals&gt; &lt;/execution&gt; &lt;/executions&gt; &lt;/plugin&gt; &lt;/plugins&gt; &lt;/build&gt; &lt;/project&gt; </code></pre> <p>Now here's a simple Java class that I want to test:</p> <p><code>src/main/java/com/stackoverflow/Hello.java</code></p> <pre><code>package com.stackoverflow; /** * @author maba, 2012-11-14 */ public interface Hello { String hello(); } </code></pre> <p><code>src/main/java/com/stackoverflow/HelloJava.java</code></p> <pre><code>package com.stackoverflow; /** * @author maba, 2012-11-14 */ public class HelloJava implements Hello { public String hello() { return "Hello Java"; } } </code></pre> <p>And finally the ScalaTest test class.</p> <p><code>src/test/scala/com/stackoverflow/HelloJavaTest.scala</code></p> <pre><code>package com.stackoverflow import org.scalatest.FlatSpec /** * @author maba, 2012-11-14 */ class HelloJavaTest extends FlatSpec { "HelloJava" should "be instance of Hello" in { val hello = new HelloJava val result = hello match { case f:Hello =&gt; true } assert(result) } it should "say Hello Java" in { val helloJava = new HelloJava assert(helloJava.hello === "Hello Java") } } </code></pre> <p>You can now run it with this command:</p> <pre><code>mvn test </code></pre> <p>I can just right click on the test case in IntelliJ and run the test. It should be possible in eclipse as well.</p>
 

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