plugins = Collections.emptySet();
        }

        return plugins;
    }

    private Plugin newPlugin(String artifactId, String... goals) {
        Plugin plugin = new Plugin();

        plugin.setGroupId("org.apache.maven.plugins");
        plugin.setArtifactId(artifactId);

        for (String goal : goals) {
            PluginExecution pluginExecution = new PluginExecution();

import org.apache.maven.artifact.versioning.OverConstrainedVersionException;
import org.apache.maven.artifact.versioning.VersionRange;

/**
 * Maven Artifact interface. Notice that it mixes artifact definition concepts (groupId, artifactId, version)
 * with dependency information (version range, scope).
 */
public interface Artifact extends Comparable<Artifact> {

    @Deprecated(since = "4.0.0")
    String RELEASE_VERSION = "RELEASE";

        assertEquals("", projectId, "Should return empty string when all models are null");
    }

    private Model createMockModel(String groupId, String artifactId, String version) {
        return Model.newBuilder()
                .groupId(groupId)
                .artifactId(artifactId)
                .version(version)
                .packaging("jar")
                .build();
    }

    /**

        Artifact artifact = factory.createDependencyArtifact(
                "test-grp", "test-artifact", VersionRange.createFromVersion("1.0"), "type", null, "system", "provided");
        Artifact artifact2 = factory.createDependencyArtifact(
                "test-grp", "test-artifact-2", VersionRange.createFromVersion("1.0"), "type", null, "system", "test");
        Artifact artifact3 = factory.createDependencyArtifact(

          <version>1.0.0+</version>
          <required>true</required>
          <type>String</type>
        </field>
        <field>
          <name>artifactId</name>
          <description>The artifact ID of the extension.</description>
          <version>1.0.0+</version>
          <required>true</required>
          <type>String</type>
        </field>
        <field>

    bodies for debugging. It requires this Maven dependency:

     ```xml
     <dependency>
       <groupId>com.squareup.okhttp</groupId>
       <artifactId>logging-interceptor</artifactId>
       <version>2.6.0</version>
     </dependency>
     ```

    Configure basic logging like this:

    ```java
    HttpLoggingInterceptor loggingInterceptor = new HttpLoggingInterceptor();

     */
    String getArtifactId();

    /**
     * Sets the artifact id of the plugin.
     *
     * @param artifactId The artifact id of the plugin.
     * @return This request, never {@code null}.
     */
    PluginVersionRequest setArtifactId(String artifactId);

    /**
     * Gets the POM whose build plugins are to be scanned for the version.
     *

  <!-- Shared parent. Doesn't define a lot of things about Apache like general mailing lists, but does
       define the settings common to all projects at Apache -->
  <groupId>org.apache</groupId>
  <artifactId>apache</artifactId>
  <version>1</version>
  <packaging>pom</packaging>
  <name>The Apache Software Foundation</name>
  <description>

    /**
     * @param groupId the group ID of the plugin in the repository
     * @param artifactId the artifact ID of the reporting plugin in the repository
     * @return the key of the plugin, ie {@code groupId:artifactId}
     */
    public static String constructKey(String groupId, String artifactId) {
        return groupId + ":" + artifactId;
    }

            ]]>
          </code>
        </codeSegment>

                .evaluate("${mojo.plugin.artifact.artifactId}");

        System.out.println("Result: " + result);

        assertSame(
                exec.getPlugin().getArtifact().getArtifactId(),
                result,
                "${plugin.artifactId} expression does not return plugin descriptor's artifactId.");
    }

    @Test