Use maven-plugin-testing-harness 3.4.0

Author: slawekjaranowski

pom.xml

@@ -103,7 +103,7 @@ under the License.
     <dependency>
       <groupId>org.apache.maven.plugin-testing</groupId>
       <artifactId>maven-plugin-testing-harness</artifactId>
-      <version>4.0.0-alpha-2</version>
+      <version>3.4.0</version>
       <scope>test</scope>
     </dependency>
     <dependency>
@@ -117,12 +117,6 @@ under the License.
       <version>4.11.0</version>
       <scope>test</scope>
     </dependency>
-    <dependency>
-      <groupId>org.codehaus.plexus</groupId>
-      <artifactId>plexus-testing</artifactId>
-      <version>1.7.0</version>
-      <scope>test</scope>
-    </dependency>
   </dependencies>
 
   <profiles>

src/test/java/org/apache/maven/plugins/clean/CleanMojoTest.java

@@ -29,17 +29,17 @@
 import java.nio.file.Paths;
 import java.util.Collections;
 
+import org.apache.maven.api.plugin.testing.InjectMojo;
+import org.apache.maven.api.plugin.testing.MojoTest;
 import org.apache.maven.plugin.MojoExecutionException;
 import org.apache.maven.plugin.logging.SystemStreamLog;
-import org.apache.maven.plugin.testing.junit5.InjectMojo;
-import org.apache.maven.plugin.testing.junit5.MojoTest;
 import org.junit.jupiter.api.Test;
 import org.junit.jupiter.api.condition.DisabledOnOs;
 import org.junit.jupiter.api.condition.EnabledOnOs;
 import org.junit.jupiter.api.condition.OS;
 
-import static org.apache.maven.plugin.testing.junit5.MojoExtension.setVariableValueToObject;
-import static org.codehaus.plexus.testing.PlexusExtension.getBasedir;
+import static org.apache.maven.api.plugin.testing.MojoExtension.getBasedir;
+import static org.apache.maven.api.plugin.testing.MojoExtension.setVariableValueToObject;
 import static org.codehaus.plexus.util.IOUtil.copy;
 import static org.junit.jupiter.api.Assertions.assertFalse;
 import static org.junit.jupiter.api.Assertions.assertNotNull;