Add corelib tests

test/codegen/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));
+}