### Question:
IncludeExcludeFilter { @VisibleForTesting static void mainHelper(String[] args, java.io.InputStream inStream) throws java.io.IOException { Configuration.initConfig(args); IncludeExcludeFilter filter = IncludeExcludeFilter.fromConfiguration(); System.out.println("Rules:"); Stream.concat(filter.prefixIncludeRules.stream(), filter.prefixExcludeRules.stream()) .forEach(rule -> System.out.println("*** " + rule)); Stream.concat( filter.regexIncludeRules.values().stream().filter(list -> !list.isEmpty()), filter.regexExcludeRules.values().stream().filter(list -> !list.isEmpty())) .forEach(list -> list.stream().forEach(rule -> System.out.println("*** " + rule))); System.out.println(); System.out.println("Enter test value(s)"); Scanner in = new Scanner(inStream); while (in.hasNext()) { String value = in.next(); System.out.println(value); for (ItemType itemType : ItemType.values()) { System.out.println(" as " + itemType.name() + ": " + filter.isAllowed(value, itemType)); } System.out.println(); } } @VisibleForTesting  IncludeExcludeFilter(List<Rule> rules); @Override String toString(); static IncludeExcludeFilter fromConfiguration(); boolean isAllowed(String value, ItemType itemType); static void main(String[] args);  }### Answer:
@Test public void mainHelper_succeeds() throws Exception { IncludeExcludeFilter.mainHelper(new String[0], new ByteArrayInputStream("/path/to/doc.txt".getBytes())); }