/** Tests iterations that return names. */
private void testMatch(CheckIterator check) {
service.addAll(
Arrays.asList("able", "al", "alan", "alex", "ann", "bill", "billy", "bob", "bobby"));
check.checkContents("", "able", "al", "alan", "alex", "ann", "bill", "billy", "bob", "bobby");
check.checkContents("a", "able", "al", "alan", "alex", "ann");
check.checkContents("al", "alan", "alex");
check.checkContents("ale", "alex");
check.checkContents("alex");
check.checkContents("b", "bill", "billy", "bob", "bobby");
check.checkContents("bill", "billy");
check.checkContents("billy");
}
/** Tests iterations that return no names. */
private void testNoMatch(CheckIterator check) {
check.checkContents("");
service.addAll(Arrays.asList("bill", "bob"));
check.checkContents("a");
check.checkContents("ba");
check.checkContents("billy");
check.checkContents("bit");
check.checkContents("boa");
check.checkContents("bob");
check.checkContents("bobby");
check.checkContents("carl");
}