| // 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. |
| |
| /** |
| * @assertion 15.10.2.6: The production Assertion :: \ B evaluates by returning |
| * an internal AssertionTester closure that takes a State argument x and |
| * performs the following: |
| * <ol> |
| * <li>Let e be x's endIndex.</li> |
| * <li>Call IsWordChar(e-1) and let a be the Boolean result.</li> |
| * <li>Call IsWordChar(e) and let b be the Boolean result.</li> |
| * <li>If a is true and b is false, return false.</li> |
| * <li>If a is false and b is true, return false.</li> |
| * <li>Return true. </li> |
| * </ol> |
| * The abstract operation IsWordChar(e) returns true if and only if its argument |
| * is between -1 and InputLength (exclusive) and the input character at the |
| * position specified by e is one of: latin letters (both cases), arabic |
| * numerals or the underscore. |
| * @description Checks that the \B assertion is interpreted correctly. |
| * @3rdparty sputnik-v1:S15.10.2.6_A4_T1.js-S15.10.2.6_A4_T8.js |
| * @author rodionov |
| */ |
| import "../../../../Utils/expect.dart"; |
| |
| |
| main() { |
| check(r"\Bevil\B", "devils arise\tfor\nevil", matchPos: 1); |
| check(r"[f-z]e\B", "devils arise\tfor\nrevil", matchPos: 17); |
| check(r"\Bo\B", "devils arise\tfOr\nrevil", ignoreCase: true, matchPos: 14); |
| check(r"\B\w\B", "devils arise\tfor\nrevil", matchPos: 1); |
| check(r"\w\B", "devils arise\tfor\nrevil", matchPos: 0); |
| check(r"\B\w", "devils arise\tfor\nrevil", matchPos: 1); |
| checkNeg(r"\B[a-yA-Y]{4}\B", "devil arise\tforzzx\nevils"); |
| check(r"\B\w{4}\B", "devil arise\tforzzx\nevils", matchPos: 13); |
| } |
| |
| void check(String pattern, String str, {bool multiLine: false, |
| bool ignoreCase: false, int matchPos: -1}) { |
| RegExp re = new RegExp(pattern, multiLine: multiLine, |
| caseSensitive: !ignoreCase); |
| Match? fm = re.firstMatch(str); |
| Expect.isNotNull(fm, "\"$pattern\" !~ \"$str\""); |
| if(matchPos >= 0) { |
| Expect.equals(matchPos, fm?.start); |
| } |
| } |
| |
| void checkNeg(String pattern, String str, {bool multiLine: false, |
| bool ignoreCase: false}) { |
| RegExp re = new RegExp(pattern, multiLine: multiLine, |
| caseSensitive: !ignoreCase); |
| Expect.isNull(re.firstMatch(str), "\"$pattern\" ~ \"$str\""); |
| } |