void shouldHandleMergingWithDifferentPOMSets() {
            Path pom1 = Paths.get("pom.xml");
            Path pom2 = Paths.get("module1/pom.xml");
            Path pom3 = Paths.get("module2/pom.xml");

            UpgradeResult result1 = new UpgradeResult(
                    Set.of(pom1, pom2), // processed
                    Set.of(pom1), // modified
                    Set.of() // errors
                    );

            context.indent();
            context.info("Processed: " + result.processedPoms().size() + " POMs");
            context.info("Modified: " + result.modifiedPoms().size() + " POMs");
            context.failure("Errors: " + result.errorPoms().size() + " POMs");
            context.unindent();
        } else if (!result.modifiedPoms().isEmpty()) {

/**
 * Result of an upgrade strategy application.
 * Uses sets of paths to track which POMs were processed, modified, or had errors,
 * avoiding double-counting when multiple strategies affect the same POMs.
 *
 * @param processedPoms the set of POMs that were processed
 * @param modifiedPoms the set of POMs that were modified
 * @param errorPoms the set of POMs that had errors
 */

    /**
     * Check most classical urls inheritance: directory structure where parent POM in parent directory
     * and child directory == artifactId
     * @throws IOException Model read problem
     */
    @Test
    void testUrls() throws Exception {
        testInheritance("urls");
    }

    /**
     * Flat directory structure: parent & child POMs in sibling directories, child directory == artifactId.

      <![CDATA[
      This is a list of ArtifactRepository instances used to resolve the Artifacts associated
      with the current POM.

      NOTE: This list will contain entries for repositories specified by ancestor POMs, including
      the default built-in super-POM, which is the parent of all POMs.
    ]]></description>
  </expression>
  <expression>
    <syntax>project.pluginArtifactRepositories</syntax>
    <configuration>

            assertEquals(0, result.processedPoms().size(), "Should have no processed POMs");
            assertEquals(0, result.modifiedPoms().size(), "Should have no modified POMs");
            assertEquals(0, result.errorPoms().size(), "Should have no error POMs");
        }

        @Test
        @DisplayName("should handle overlapping POM modifications")
        void shouldHandleOverlappingPOMModifications() throws Exception {

        results.add(result2);

        ProjectBuildingException exception = new ProjectBuildingException(results);
        String message = exception.getMessage();

        assertTrue(
                message.contains("3 problems were encountered while processing the POMs (2 errors)"),
                "Message should contain problem count and error count");

        int i = 0;
        for (Path pom : state.poms) {
            try (InputStream is = Files.newInputStream(pom)) {
                MavenStaxReader reader = new MavenStaxReader();
                reader.setAddLocationInformation(false);
                reader.read(is, true, InputSource.of("id", pom.toString()));
                i++;
            } catch (XMLStreamException e) {

        @DisplayName("should handle large number of POMs efficiently")
        void shouldHandleLargeNumberOfPOMsEfficiently() throws Exception {
            // Create a large number of POM documents for performance testing
            Map<Path, Document> largePomMap = new HashMap<>();

            for (int i = 0; i < 100; i++) {
                Path pomPath = Paths.get("module" + i + "/pom.xml");

            context.failure("Failed to discover POM files: " + e.getMessage());
            return 1;
        }

        if (pomMap.isEmpty()) {
            context.warning("No POM files found in " + startingDirectory);
            return 0;
        }

        context.info("Found " + pomMap.size() + " POM file(s)");

        // Perform the upgrade logic