blob: 35d34ee7e8ad045ec41075ef97b93609de6334e7 [file] [log] [blame]
// 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.
// @dart = 2.9
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));
}