### Question:
Utils { public static boolean isEmpty( CharSequence val ) { return val == null || val.length() == 0; }  static int getDamerauLevenshteinDistance( String s, String t ); static boolean isEmpty( CharSequence val ); static boolean isEmpty( CharSequence[] strings ); static boolean isEmpty( Object[] array ); static boolean isEmpty( List<?> list ); static String resolvePassword( VariableSpace variables, String password ); static String[][] normalizeArrays( int normalizeToLength, String[]... arraysToNormalize ); static long[][] normalizeArrays( int normalizeToLength, long[]... arraysToNormalize ); static int[][] normalizeArrays( int normalizeToLength, int[]... arraysToNormalize ); static boolean[][] normalizeArrays( int normalizeToLength, boolean[]... arraysToNormalize ); static short[][] normalizeArrays( int normalizeToLength, short[]... arraysToNormalize );  }### Answer:
@Test public void testIsEmptyStringArray() { assertTrue( Utils.isEmpty( (String[]) null ) ); assertTrue( Utils.isEmpty( new String[] {} ) ); assertFalse( Utils.isEmpty( new String[] { "test" } ) ); }
@Test public void testIsEmptyObjectArray() { assertTrue( Utils.isEmpty( (Object[]) null ) ); assertTrue( Utils.isEmpty( new Object[] {} ) ); assertFalse( Utils.isEmpty( new Object[] { "test" } ) ); }
@Test public void testIsEmptyList() { assertTrue( Utils.isEmpty( (List<String>) null ) ); assertTrue( Utils.isEmpty( new ArrayList<String>() ) ); assertFalse( Utils.isEmpty( Arrays.asList( "test", 1 ) ) ); }
@Test public void testIsEmptyStringBuffer() { assertTrue( Utils.isEmpty( (StringBuffer) null ) ); assertTrue( Utils.isEmpty( new StringBuffer( "" ) ) ); assertFalse( Utils.isEmpty( new StringBuffer( "test" ) ) ); }
@Test public void testIsEmptyStringBuilder() { assertTrue( Utils.isEmpty( (StringBuilder) null ) ); assertTrue( Utils.isEmpty( new StringBuilder( "" ) ) ); assertFalse( Utils.isEmpty( new StringBuilder( "test" ) ) ); }
@Test public void testIsEmpty() { assertTrue( Utils.isEmpty( (String) null ) ); assertTrue( Utils.isEmpty( "" ) ); assertFalse( Utils.isEmpty( "test" ) ); }