TextUtils { public static String createAssignment(Map<String, Set<String>> data) { return enumerateValues( data.keySet().stream() .map(k -> String.format("%s%s%s", k, EQUALITY, enumerateValues(data.get(k), COMMA))) .collect(Collectors.toList()), SEMICOLON ); }  static String replacePlaceholders(final String template, Map<Placeholder, String> values); static String getPlaceholder(Placeholder placeholder); static String underscoreToUpperCamel(String input); static boolean containsPlaceholder(final String template, Placeholder placeholder); static String enumerateValues(Collection<String> values); static String enumerateValues(Collection<String> values, String delimiter); static String joinLines(Collection<String> values); static String humanizedDuration(ZonedDateTime zonedDateTime); static String createAssignment(Map<String, Set<String>> data); static Map<String, Set<String>> parseAssignment(String data); static Set<Integer> parseRange(String range); static boolean isRange(String value); static Set<String> parseEnumeration(String data); static Set<String> parseEnumeration(String data, String delimiter); static boolean isRangeDelimiter(String key); static boolean isFirstElementKey(String key); static boolean isLastElementKey(String key); static boolean isNextElementKey(String key); static boolean isPrevElementKey(String key); static boolean isExitKey(String key); static boolean isSkipKey(String key); static boolean isYesKey(String key); static boolean isNoKey(String key); static boolean isRepeatKey(String key); static boolean isNumericKey(String key); static boolean isPositiveInt(String key); static String quoteIfNeeded(String value); static String getAsExactMatch(String value); static Collection<String> removeSuffixes(Collection<String> input, Collection<String> suffixes); static Optional<T> routeByKey(Map<Predicate<String>, Function<String, T>> routes); static Optional<T> routeByKey(Map<Predicate<String>, Function<String, T>> routes, Consumer<String> onInvalidKey); static Optional<T> routeByKey(Map<Predicate<String>, Function<String, T>> routes, Consumer<String> onInvalidKey, Consumer<Exception> onException); static String getVersion(); static final String YES; static final String NO; static final String QUIT; static final String DASH; }
@Test public void testCreateAssignment() { Map<String, Set<String>> data = new HashMap<>(); data.put("key1", new HashSet<>(Arrays.asList("value11", "value12"))); data.put("key2", new HashSet<>(Collections.singletonList("value21"))); assertThat(createAssignment(data), equalTo("key1=value11,value12;key2=value21")); }