### Question:
StringUtils { public static boolean isNotEmpty(final String s) { return (s != null && s.length() > 0); } private  StringUtils(); static String tagSwap(String content, Map<String, String> tagSwapMap); static String insertContent(String original, int position, String content); static List<String> getParameter(String list, String delimiter, String parameterName); static String ifNullOrEmpty(final String original, final String defaultString); static String encodeURIComponent(String component, String encoding); static boolean isEmpty(final String s); static boolean isBlank(final String s); static boolean isNotEmpty(final String s); static boolean isNotBlank(final String s); static boolean isAnyBlank(final Set<String> xs); static boolean isEqualTo(String s1, String s2); static boolean compareCaseInsensitiveString(String s1, String s2); static boolean contains(String s1, String s2); static boolean containsCaseInsensitive(String s1, String s2); static boolean startsWith(String s1, String s2); static boolean match(String value, String strPattern);  }### Answer:
@Test public void shouldNotBeEmpty() { assertThat(StringUtils.isNotEmpty("abc")).isTrue(); assertThat(StringUtils.isNotEmpty(" ")).isTrue(); assertThat(StringUtils.isNotEmpty(null)).isFalse(); assertThat(StringUtils.isNotEmpty("")).isFalse(); }