pom-another-solution.xml

<?xml version="1.0"?>
<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/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>net.glamenv-septzen</groupId>
  <artifactId>maven3-junit-spock-testng-mixin</artifactId>
  <version>1.0-SNAPSHOT</version>
  <packaging>jar</packaging>
  <name>spock, TestNG, Maven3 Integration Demo</name>

  <!-- from https://github.com/spockframework/spock-example/blob/master/pom.xml -->

  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <project.reporting.outputEncoding>UTF-8</project.reporting.outputEncoding>
    <surefire.version>2.13</surefire.version>
  </properties>

  <build>
    <plugins>
      <plugin>
        <groupId>org.codehaus.gmaven</groupId>
        <artifactId>gmaven-plugin</artifactId>
        <version>1.4</version>
        <configuration>
          <providerSelection>2.0</providerSelection>
        </configuration>
        <executions>
          <execution>
            <goals>
              <goal>compile</goal>
              <goal>testCompile</goal>
            </goals>
          </execution>
        </executions>
        <dependencies>
          <dependency>
            <groupId>org.codehaus.gmaven.runtime</groupId>
            <artifactId>gmaven-runtime-2.0</artifactId>
            <version>1.4</version>
            <exclusions>
              <exclusion>
                <groupId>org.codehaus.groovy</groupId>
                <artifactId>groovy-all</artifactId>
              </exclusion>
            </exclusions>
          </dependency>
          <dependency>
            <groupId>org.codehaus.groovy</groupId>
            <artifactId>groovy-all</artifactId>
            <version>2.1.5</version>
          </dependency>
        </dependencies>
      </plugin>
      <plugin>
        <!--
        see:
        1) http://stackoverflow.com/questions/1232853/how-to-execute-junit-and-testng-tests-in-same-project-using-maven-surefire-plugi
        2) http://confluence.highsource.org/display/~lexi/How+to+run+both+JUnit+and+TestNG+with+maven-surefire-plugin
        3) http://jira.codehaus.org/browse/SUREFIRE-377
        ... Christophe Furmaniak's solution seems smart in 1), Oct 29'11 at 17:26 post.
        -->
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-surefire-plugin</artifactId>
        <version>2.13</version>
        <configuration>
          <reportsDirectory>${project.build.directory}/surefire-reports/junit</reportsDirectory>
          <testNGArtifactName>none:none</testNGArtifactName>
          <includes>
            <!-- for JUnit, explicitly add xxxSpec and xxxTest file patterns. -->
            <!-- (mysteriously, ".groovy" dosn't work for Spock's xxxxSpec.groovy, but ".java" work!!) -->
            <include>**/*Spec.java</include>
            <include>**/*Test.java</include>
          </includes>
        </configuration>
        <executions>
          <execution>
            <phase>test</phase>
            <goals>
              <goal>test</goal>
            </goals>
            <configuration>
              <reportsDirectory>${project.build.directory}/surefire-reports/testng</reportsDirectory>
              <junitArtifactName>none:none</junitArtifactName>
              <testNGArtifactName>org.testng:testng</testNGArtifactName>
            </configuration>
          </execution>
        </executions>
      </plugin>
    </plugins>
  </build>

  <dependencies>
    <dependency>
      <groupId>org.spockframework</groupId>
      <artifactId>spock-core</artifactId>
      <version>0.7-groovy-2.0</version>
      <scope>test</scope>
    </dependency>
    <dependency>
      <groupId>org.testng</groupId>
      <artifactId>testng</artifactId>
      <version>[6.8,)</version>
      <scope>test</scope>
    </dependency>
  </dependencies>

</project>