### Question:
Utilities { public static boolean isFragmenterCacheEnabled() { return !StringUtils.equalsIgnoreCase(System.getProperty(PROPERTY_KEY_FRAGMENTER_CACHE, "true"), "false"); }  static byte[] parseBase64(String encoded, String paramName); static boolean isValidDirectoryName(String name); static boolean isValidRestrictedDirectoryName(String name); static Object createAnyInstance(Class<?> confClass,
                                           String className, RequestContext metaData); static Object createAnyInstance(String className); static void byteArrayToOctalString(byte[] bytes, StringBuilder sb); static String maskNonPrintables(String input); static FragmentMetadata parseFragmentMetadata(RequestContext context); static boolean aggregateOptimizationsSupported(RequestContext requestContext); static boolean implementsInterface(String className, Class<?> iface); static boolean isFragmenterCacheEnabled(); static String absoluteDataPath(String dataSource); static boolean isSecurityEnabled(Configuration configuration); static String rightTrimWhiteSpace(String s); static String getHost(String uri); static final Pattern SCHEME_PATTERN; static final Pattern NON_HOSTNAME_CHARACTERS; }### Answer:
@Test public void testFragmenterCachePropertyAbsent() { System.clearProperty(PROPERTY_KEY_FRAGMENTER_CACHE); assertTrue(Utilities.isFragmenterCacheEnabled()); }
@Test public void testFragmenterCachePropertyEmpty() { System.setProperty(PROPERTY_KEY_FRAGMENTER_CACHE, ""); assertTrue(Utilities.isFragmenterCacheEnabled()); }
@Test public void testFragmenterCachePropertyFoo() { System.setProperty(PROPERTY_KEY_FRAGMENTER_CACHE, "foo"); assertTrue(Utilities.isFragmenterCacheEnabled()); }
@Test public void testFragmenterCachePropertyFALSE() { System.setProperty(PROPERTY_KEY_FRAGMENTER_CACHE, "FALSE"); assertFalse(Utilities.isFragmenterCacheEnabled()); }
@Test public void testFragmenterCachePropertyFalse() { System.setProperty(PROPERTY_KEY_FRAGMENTER_CACHE, "false"); assertFalse(Utilities.isFragmenterCacheEnabled()); }