UpgradeContext context = createMockContext(tempDir, TestUtils.createOptionsWithModelVersion("4.1.0"));
            String result = upgradeGoal.testDoUpgradeLogic(context, "4.1.0");

            assertEquals("4.1.0", result);
        }

        @Test
        @DisplayName("should use 4.1.0 when --all option is specified")
        void shouldUse410WhenAllOptionSpecified() {

        }

        @Test
        @DisplayName("should handle newer than 4.1.0 versions")
        void shouldHandleNewerThan410Versions() {
            assertTrue(ModelVersionUtils.isNewerThan410("4.2.0"));
            assertTrue(ModelVersionUtils.isNewerThan410("5.0.0"));
            assertFalse(ModelVersionUtils.isNewerThan410("4.1.0"));
            assertFalse(ModelVersionUtils.isNewerThan410("4.0.0"));
        }

                    .modelVersion("4.1.0")
                    .parent("com.example", "parent-project", "1.0.0")
                    .artifactId("module-a")
                    .build();

            String moduleBPomXml = """
                <?xml version="1.0" encoding="UTF-8"?>
                <project xmlns="http://maven.apache.org/POM/4.1.0">
                    <parent>

        @Test
        @DisplayName("should fail with error when attempting downgrade from 4.1.0 to 4.0.0")
        void shouldFailWhenAttemptingDowngrade() throws Exception {
            String pomXml = """
                <?xml version="1.0" encoding="UTF-8"?>
                <project xmlns="http://maven.apache.org/POM/4.1.0">
                    <modelVersion>4.1.0</modelVersion>
                    <groupId>com.example</groupId>

 * <ul>
 *   <li><strong>4.0.0 → 4.1.0</strong>: Upgrades Maven 3.x POMs to Maven 4.1.0 format</li>
 * </ul>
 *
 * <h3>4.0.0 → 4.1.0 Upgrade Process</h3>
 * <ol>
 *   <li><strong>Namespace Update</strong>: Changes namespace from Maven 4.0.0 to 4.1.0 for all elements</li>
 *   <li><strong>Schema Location Update</strong>: Updates xsi:schemaLocation to Maven 4.1.0 XSD</li>

     * @since 4.1.0
     */
    @Config(defaultValue = "Dependency")
    public static final String MAVEN_MODEL_PROCESSOR_POOLED_TYPES = "maven.model.processor.pooledTypes";

    /**
     * User property key for configuring the default reference type used by ModelObjectProcessor.
     * Valid values are: "SOFT", "HARD", "WEAK", "NONE".
     * Default is "HARD" for optimal performance.
     *
     * @since 4.1.0
     */

 * <pre>{@code
 * mvnup check
 * }</pre>
 *
 * <h3>Apply All Upgrades</h3>
 * <pre>{@code
 * mvnup apply --all
 * }</pre>
 *
 * <h3>Upgrade to Maven 4.1.0 with Inference</h3>
 * <pre>{@code
 * mvnup apply --model 4.1.0 --infer
 * }</pre>
 *
 * <h2>Extension Points</h2>
 *
 * <p>To add new upgrade strategies:</p>
 * <ol>

                || MODEL_VERSION_4_2_0.equals(modelVersion);
    }

    /**
     * Checks if a model version is newer than 4.1.0.
     *
     * @param modelVersion the model version to check
     * @return true if newer than 4.1.0
     */
    public static boolean isNewerThan410(String modelVersion) {
        if (modelVersion == null) {
            return false;
        }

    assertEquals(range, range.span(Range.closed(6, 8)));

    // equal
    assertEquals(range, range.span(range));

    // enclosing with same start
    assertEquals(Range.closed(4, 10), range.span(Range.closed(4, 10)));
    assertEquals(Range.atLeast(4), range.span(Range.atLeast(4)));

    // enclosing with same end
    assertEquals(Range.closed(2, 8), range.span(Range.closed(2, 8)));

        <name>Mixin</name>
        <version>4.1.0+</version>
        <superClass>Parent</superClass>
        <fields>
            <field>
                <name>classifier</name>
                <version>4.1.0+</version>
                <type>String</type>
            </field>
            <field>
                <name>extension</name>
                <version>4.1.0+</version>
                <type>String</type>