Spock Extension for Quarkus

Add this to your plugins in your Maven build

<plugin>
    <groupId>org.codehaus.gmavenplus</groupId>
    <artifactId>gmavenplus-plugin</artifactId>
    <version>1.6.2</version>
    <executions>
        <execution>
            <goals>
                <goal>addSources</goal>
                <goal>addTestSources</goal>
                <goal>generateStubs</goal>
                <goal>compile</goal>
                <goal>generateTestStubs</goal>
                <goal>compileTests</goal>
                <goal>removeStubs</goal>
                <goal>removeTestStubs</goal>
            </goals>
        </execution>
    </executions>
    <dependencies>
        <dependency>
            <groupId>org.codehaus.groovy</groupId>
            <artifactId>groovy-all</artifactId>
            <version>2.5.6</version>
            <scope>runtime</scope>
            <type>pom</type>
        </dependency>
    </dependencies>
</plugin>

You will also need to add Byte Buddy

<dependency>
    <groupId>net.bytebuddy</groupId>
    <artifactId>byte-buddy</artifactId>
    <version>1.9.12</version>
</dependency>