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| 1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file |
| 2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
| 3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
| 4 // Dart test for testing regular expressions in Dart. | 4 // Dart test for testing regular expressions in Dart. |
| 5 | 5 |
| 6 import "package:expect/expect.dart"; | 6 import "package:expect/expect.dart"; |
| 7 | 7 |
| 8 void main() { | 8 void main() { |
| 9 RegExp exp = new RegExp(r"(\w+)"); | 9 RegExp exp = new RegExp(r"(\w+)"); |
| 10 String str = "Parse my string"; | 10 String str = "Parse my string"; |
| 11 List<Match> matches = exp.allMatches(str).toList(); | 11 List<Match> matches = exp.allMatches(str).toList(); |
| 12 Expect.equals(3, matches.length); | 12 Expect.equals(3, matches.length); |
| 13 Expect.equals("Parse", matches[0].group(0)); | 13 Expect.equals("Parse", matches[0].group(0)); |
| 14 Expect.equals("my", matches[1].group(0)); | 14 Expect.equals("my", matches[1].group(0)); |
| 15 Expect.equals("string", matches[2].group(0)); | 15 Expect.equals("string", matches[2].group(0)); |
| 16 | 16 |
| 17 // Check that allMatches progresses correctly for empty matches, and that | 17 // Check that allMatches progresses correctly for empty matches, and that |
| 18 // it includes the empty match at the end position. | 18 // it includes the empty match at the end position. |
| 19 exp = new RegExp("a?"); | 19 exp = new RegExp("a?"); |
| 20 str = "babba"; | 20 str = "babba"; |
| 21 Expect.listEquals(["", "a", "", "", "a", ""], | 21 Expect.listEquals(["", "a", "", "", "a", ""], |
| 22 exp.allMatches(str).map((x)=>x[0]).toList()); | 22 exp.allMatches(str).map((x) => x[0]).toList()); |
| 23 | 23 |
| 24 // Check that allMatches works with optional start index. | 24 // Check that allMatches works with optional start index. |
| 25 exp = new RegExp("as{2}"); | 25 exp = new RegExp("as{2}"); |
| 26 str = "assassin"; | 26 str = "assassin"; |
| 27 Expect.equals(2, exp.allMatches(str).length); | 27 Expect.equals(2, exp.allMatches(str).length); |
| 28 Expect.equals(2, exp.allMatches(str, 0).length); | 28 Expect.equals(2, exp.allMatches(str, 0).length); |
| 29 Expect.equals(1, exp.allMatches(str, 1).length); | 29 Expect.equals(1, exp.allMatches(str, 1).length); |
| 30 Expect.equals(0, exp.allMatches(str, 4).length); | 30 Expect.equals(0, exp.allMatches(str, 4).length); |
| 31 Expect.equals(0, exp.allMatches(str, str.length).length); | 31 Expect.equals(0, exp.allMatches(str, str.length).length); |
| 32 Expect.throws(() => exp.allMatches(str, -1)); | 32 Expect.throws(() => exp.allMatches(str, -1)); |
| 33 Expect.throws(() => exp.allMatches(str, str.length + 1)); | 33 Expect.throws(() => exp.allMatches(str, str.length + 1)); |
| 34 | 34 |
| 35 exp = new RegExp(".*"); | 35 exp = new RegExp(".*"); |
| 36 Expect.equals("", exp.allMatches(str, str.length).single[0]); | 36 Expect.equals("", exp.allMatches(str, str.length).single[0]); |
| 37 | 37 |
| 38 // The "^" must only match at the beginning of the string. | 38 // The "^" must only match at the beginning of the string. |
| 39 // Using a start-index doesn't change where the string starts. | 39 // Using a start-index doesn't change where the string starts. |
| 40 exp = new RegExp("^ass"); | 40 exp = new RegExp("^ass"); |
| 41 Expect.equals(1, exp.allMatches(str, 0).length); | 41 Expect.equals(1, exp.allMatches(str, 0).length); |
| 42 Expect.equals(0, exp.allMatches(str, 3).length); | 42 Expect.equals(0, exp.allMatches(str, 3).length); |
| 43 | 43 |
| 44 // Regression test for http://dartbug.com/2980 | 44 // Regression test for http://dartbug.com/2980 |
| 45 exp = new RegExp("^", multiLine: true); // Any zero-length match will work. | 45 exp = new RegExp("^", multiLine: true); // Any zero-length match will work. |
| 46 str = "foo\nbar\nbaz"; | 46 str = "foo\nbar\nbaz"; |
| 47 Expect.equals(" foo\n bar\n baz", str.replaceAll(exp, " ")); | 47 Expect.equals(" foo\n bar\n baz", str.replaceAll(exp, " ")); |
| 48 | 48 |
| 49 exp = new RegExp(r"(\w+)"); | 49 exp = new RegExp(r"(\w+)"); |
| 50 Expect.isNull(exp.matchAsPrefix(" xyz ab")); | 50 Expect.isNull(exp.matchAsPrefix(" xyz ab")); |
| 51 Expect.isNull(exp.matchAsPrefix(" xyz ab", 0)); | 51 Expect.isNull(exp.matchAsPrefix(" xyz ab", 0)); |
| 52 | 52 |
| 53 var m = exp.matchAsPrefix(" xyz ab", 1); | 53 var m = exp.matchAsPrefix(" xyz ab", 1); |
| 54 Expect.equals("xyz", m[0]); | 54 Expect.equals("xyz", m[0]); |
| 55 Expect.equals("xyz", m[1]); | 55 Expect.equals("xyz", m[1]); |
| (...skipping 19 matching lines...) Expand all Loading... |
| 75 m = exp.matchAsPrefix(" xyz ab", 6); | 75 m = exp.matchAsPrefix(" xyz ab", 6); |
| 76 Expect.equals("b", m[0]); | 76 Expect.equals("b", m[0]); |
| 77 Expect.equals("b", m[1]); | 77 Expect.equals("b", m[1]); |
| 78 Expect.equals(1, m.groupCount); | 78 Expect.equals(1, m.groupCount); |
| 79 | 79 |
| 80 Expect.isNull(exp.matchAsPrefix(" xyz ab", 7)); | 80 Expect.isNull(exp.matchAsPrefix(" xyz ab", 7)); |
| 81 | 81 |
| 82 Expect.throws(() => exp.matchAsPrefix(" xyz ab", -1)); | 82 Expect.throws(() => exp.matchAsPrefix(" xyz ab", -1)); |
| 83 Expect.throws(() => exp.matchAsPrefix(" xyz ab", 8)); | 83 Expect.throws(() => exp.matchAsPrefix(" xyz ab", 8)); |
| 84 } | 84 } |
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