private File createDirectory(File parentDirectory, String name) {
    File file = new File(parentDirectory, name);
    assertThat(file.mkdir()).isTrue();
    return file;
  }
Extracted and exploded {@code testDiskRegDWAttrbts} from {@link DiskRegionJUnitTest}.
geode-core/src/integrationTest/java/org/apache/geode/internal/cache/DiskRegionAttributesIntegrationTest.java