@Test
public void testMany1_withCharPredicate() {

  Parser<Void> scanner = Scanners.many1(CharPredicates.IS_ALPHA);
  assertScanner(mode, scanner, "abc123", "123");
  assertFailure(mode, scanner, "123", 1, 1, "[a-zA-Z]+ expected, 1 encountered.");
  assertFailure(mode, scanner, "", 1, 1, "[a-zA-Z]+ expected, EOF encountered.");
}