assertTrue(Files.isDirectory(mvnDir), ".mvn should be a directory");
        }

        @Test
        @DisplayName("should create .mvn directory when model version is 4.1.0")
        void shouldCreateMvnDirectoryWhenModelVersion410() throws Exception {
            Path projectDir = tempDir.resolve("project");
            Files.createDirectories(projectDir);

            UpgradeContext context = createMockContext(projectDir);