public InvalidPluginDescriptorException(String message, List<String> errors) {
        super(toMessage(message, errors));
    }

    private static String toMessage(String message, List<String> errors) {
        StringBuilder buffer = new StringBuilder(256);
        buffer.append(message);
        for (String error : errors) {
            buffer.append(", ").append(error);
        }
        return buffer.toString();
    }

        descriptor.setArtifactId("maven-it-plugin");
        descriptor.setVersion("0.1");
        List<String> errors = new ArrayList<>();
        mavenPluginValidator.validate(plugin, descriptor, errors);
        assertTrue(errors.isEmpty());
    }

    @Test
    void testInvalidGroupId() {
        Artifact plugin = new DefaultArtifact(
                "org.apache.maven.its.plugins",

        if (!pluginArtifact.getGroupId().equals(pluginDescriptor.getGroupId())) {
            errors.add("Plugin's descriptor contains the wrong group ID: " + pluginDescriptor.getGroupId());
        }

        if (!pluginArtifact.getArtifactId().equals(pluginDescriptor.getArtifactId())) {

 * <ul>
 *   <li>missing metadata</li>
 *   <li>version range violations</li>
 *   <li>version circular dependencies</li>
 *   <li>missing artifacts</li>
 *   <li>network/transfer errors</li>
 *   <li>file system errors: permissions</li>
 * </ul>
 *
 * TODO carlos: all these possible has*Exceptions and get*Exceptions methods make the clients too

                a = factory.createBuildArtifact("org.apache.maven", "h", "1.0", "jar");
                dependencies.add(a);
            } catch (Exception e) {
                throw new ArtifactMetadataRetrievalException("Error retrieving metadata", e, a);
            }
        }

        if ("i".equals(artifact.getArtifactId())) {
            Artifact a = null;
            try {

    }

    /**
     * Append message content in error style.
     * By default, bold red
     *
     * @param message the message to append
     * @return the current builder
     */
    @Nonnull
    default MessageBuilder error(Object message) {
        return style(".error:-bold,f:red", message);
    }

    /**
     * Append message content in success style.

                                    e.getModelId(), e.getMessage(), pomFile != null ? pomFile.toFile() : null, e);
                        }
                        // validation error, continue project building and delay failing to help IDEs
                        error = e;
                    }

                    modelProblems = result.getProblems();

                    initProject(project, Collections.emptyMap(), result);

 * KIND, either express or implied.  See the License for the
 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven;

/**
 * Signals an internal error in Maven itself, e.g. a programming bug.
 *
 */
public class InternalErrorException extends MavenExecutionException {

    public InternalErrorException(String message, Throwable cause) {
        super(message, cause);

  <version>0.1</version>
  <packaging>jar</packaging>

  <name>Maven Integration Test :: MNG-4193</name>
  <description>
    Test that multiple artifact repository declarations with the same id cause a validation error.
  </description>

  <repositories>
    <repository>
      <id>one</id>
      <url>https://repo1.maven.org/maven2</url>
    </repository>
    <repository>
      <id>one</id>

 * specific language governing permissions and limitations
 * under the License.
 */
package org.apache.maven.repository.legacy.metadata;

import org.apache.maven.artifact.Artifact;

/**
 * Error while retrieving repository metadata from the repository.
 *
 */
@Deprecated
public class ArtifactMetadataRetrievalException extends Exception {
    private Artifact artifact;

    /**