Migrated test block 28 to Dart 2.0.

tests/corelib/string_pattern_test.dart

-// Copyright (c) 2011, the Dart project authors.  Please see the AUTHORS file
-// for details. All rights reserved. Use of this source code is governed by a
-// BSD-style license that can be found in the LICENSE file.
-// Dart test for testing String.allMatches.
-
-import "package:expect/expect.dart";
-
-String str = "this is a string with hello here and hello there";
-
-main() {
-  testNoMatch();
-  testOneMatch();
-  testTwoMatches();
-  testEmptyPattern();
-  testEmptyString();
-  testEmptyPatternAndString();
-  testMatchAsPrefix();
-  testAllMatchesStart();
-}
-
-testNoMatch() {
-  // Also tests that RegExp groups don't work.
-  String helloPattern = "with (hello)";
-  Iterable<Match> matches = helloPattern.allMatches(str);
-  Expect.isFalse(matches.iterator.moveNext());
-}
-
-testOneMatch() {
-  String helloPattern = "with hello";
-  Iterable<Match> matches = helloPattern.allMatches(str);
-  var iterator = matches.iterator;
-  Expect.isTrue(iterator.moveNext());
-  Match match = iterator.current;
-  Expect.isFalse(iterator.moveNext());
-  Expect.equals(str.indexOf('with', 0), match.start);
-  Expect.equals(str.indexOf('with', 0) + helloPattern.length, match.end);
-  Expect.equals(helloPattern, match.pattern);
-  Expect.equals(str, match.input);
-  Expect.equals(helloPattern, match[0]);
-  Expect.equals(0, match.groupCount);
-}
-
-testTwoMatches() {
-  String helloPattern = "hello";
-  Iterable<Match> matches = helloPattern.allMatches(str);
-
-  int count = 0;
-  int start = 0;
-  for (var match in matches) {
-    count++;
-    Expect.equals(str.indexOf('hello', start), match.start);
-    Expect.equals(str.indexOf('hello', start) + helloPattern.length, match.end);
-    Expect.equals(helloPattern, match.pattern);
-    Expect.equals(str, match.input);
-    Expect.equals(helloPattern, match[0]);
-    Expect.equals(0, match.groupCount);
-    start = match.end;
-  }
-  Expect.equals(2, count);
-}
-
-testEmptyPattern() {
-  String pattern = "";
-  Iterable<Match> matches = pattern.allMatches(str);
-  Expect.isTrue(matches.iterator.moveNext());
-}
-
-testEmptyString() {
-  String pattern = "foo";
-  String str = "";
-  Iterable<Match> matches = pattern.allMatches(str);
-  Expect.isFalse(matches.iterator.moveNext());
-}
-
-testEmptyPatternAndString() {
-  String pattern = "";
-  String str = "";
-  Iterable<Match> matches = pattern.allMatches(str);
-  Expect.isTrue(matches.iterator.moveNext());
-}
-
-testMatchAsPrefix() {
-  String pattern = "an";
-  String str = "banana";
-  Expect.isNull(pattern.matchAsPrefix(str));
-  Expect.isNull(pattern.matchAsPrefix(str, 0));
-  var m = pattern.matchAsPrefix(str, 1);
-  Expect.equals("an", m[0]);
-  Expect.equals(1, m.start);
-  Expect.isNull(pattern.matchAsPrefix(str, 2));
-  m = pattern.matchAsPrefix(str, 3);
-  Expect.equals("an", m[0]);
-  Expect.equals(3, m.start);
-  Expect.isNull(pattern.matchAsPrefix(str, 4));
-  Expect.isNull(pattern.matchAsPrefix(str, 5));
-  Expect.isNull(pattern.matchAsPrefix(str, 6));
-  Expect.throws(() => pattern.matchAsPrefix(str, -1));
-  Expect.throws(() => pattern.matchAsPrefix(str, 7));
-}
-
-testAllMatchesStart() {
-  String p = "ass";
-  String s = "assassin";
-  Expect.equals(2, p.allMatches(s).length);
-  Expect.equals(2, p.allMatches(s, 0).length);
-  Expect.equals(1, p.allMatches(s, 1).length);
-  Expect.equals(0, p.allMatches(s, 4).length);
-  Expect.equals(0, p.allMatches(s, s.length).length);
-  Expect.throws(() => p.allMatches(s, -1));
-  Expect.throws(() => p.allMatches(s, s.length + 1));
-}