List<BuilderProblem> problems = validator.validate(model);
        assertEquals(0, problems.size());

        Repository repo = org.apache.maven.api.settings.Repository.newInstance(false);
        Settings model2 = Settings.newBuilder()
                .profiles(List.of(prof.withRepositories(List.of(repo))))
                .build();
        problems.clear();
        problems = validator.validate(model2);

        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",

     * file and has not been subjected to inheritance, interpolation or profile/default injection.
     *
     * @param model The model to validate, must not be {@code null}.
     * @param request The model building request that holds further settings, must not be {@code null}.

                    }
                })
                .visit(settings);
    }

    @Override
    public List<BuilderProblem> validate(Settings settings, boolean isProjectSettings) {
        ArrayList<BuilderProblem> problems = new ArrayList<>();
        settingsValidator.validate(settings, isProjectSettings, problems);
        return problems;
    }

    @Override

    public static final MojoDescriptor POST_CLEAN = createMojoDescriptor("post-clean");

    // default (or at least some of them)

    public static final MojoDescriptor VALIDATE = createMojoDescriptor("validate");

    public static final MojoDescriptor INITIALIZE = createMojoDescriptor("initialize");

    public static final MojoDescriptor TEST_COMPILE = createMojoDescriptor("test-compile");

    }

    @Override
    public void validate(
            RepositorySystemSession session,
            Artifact pluginArtifact,
            ArtifactDescriptorResult artifactDescriptorResult) {
        if (artifactDescriptorResult.getDependencies() != null) {
            doValidate(session, pluginArtifact, artifactDescriptorResult);
        }
    }

    protected abstract void doValidate(
            RepositorySystemSession session,

        Maven maven = getContainer().lookup(Maven.class);
        MavenExecutionRequest request =
                createMavenExecutionRequest(getProject("simple")).setGoals(asList("validate"));

        MavenExecutionResult result = maven.execute(request);

        Class<?> wsrClass = wsrClassCatcher.wsrClassRef.get();
        assertNotNull(wsrClass, "wsr cannot be null");

@Singleton
public final class DefaultLifecycleProvider extends AbstractLifecycleProvider {
    static final String LIFECYCLE_ID = "default";

    // START SNIPPET: default
    private static final String[] PHASES = {
        "validate",
        "initialize",
        "generate-sources",
        "process-sources",
        "generate-resources",
        "process-resources",
        "compile",
        "process-classes",

        ExpressionEvaluator expressionEvaluator =
                new PluginParameterExpressionEvaluatorV4(sessionV4, project, execution);

        for (MavenPluginConfigurationValidator validator : configurationValidators) {
            validator.validate(session, mojoDescriptor, mojo.getClass(), pomConfiguration, expressionEvaluator);
        }

        populateMojoExecutionFields(
                mojo,

    }

    /**
     * Validate the specified settings.
     *
     * @param settings The settings to validate, must not be {@code null}.
     * @return The list of problems that were encountered, must not be {@code null}.
     */
    @Nonnull
    default List<BuilderProblem> validate(@Nonnull Settings settings) {
        return validate(settings, false);
    }

    /**