### Question:
StringUtil implements Serializable { public boolean isEmpty(String str) { if (str == null || str.trim().length() == 0) { return true; } return false; } StringUtil(); boolean isEmpty(String str); boolean isEmptyOrWildcardAsterisk(String str); boolean equals(String str1, String str2); String toCamelCaseAllWords(String str); boolean validatePassword(String password, String[] invalidValues); boolean validateEmail(String emailAddress); boolean regExPatternMatch(String expression, String inputStr); boolean validateString(String regExStr, String str); String normalizeEmail(String email); String[] split(String value); String[] split(String value, String delimiter); static String trim(String str); boolean isValidName(String name); boolean isEmpty(List<?> list); String getValidUserName(String str); static final public int MIN_PASSWORD_LENGTH; static final public String VALIDATION_NAME; static final public String VALIDATION_TEXT; static final public String VALIDATION_LOGINID; static final public String VALIDATION_ALPHA; static final public String VALIDATION_IP_ADDRESS; static final public String WILDCARD_ASTERISK; }### Answer:
@Test public void testIsListEmpty(){ List<String> list=new ArrayList<String>() ; boolean listValue = stringUtil.isEmpty(list); Assert.assertTrue(listValue); }
@Test public void testIsListNotEmpty(){ List<String> list=new ArrayList<String>() ; list.add("a"); list.add("b"); boolean listValue = stringUtil.isEmpty(list); Assert.assertFalse(listValue); }