Jacob Richman
2dcd56ef43
There are far too many files here to review everyone carefully. Spot checking most of the diffs look good as test code is generally written with less care than application code so lots of ugly formatting get through. If people notice files where the automated formatting bothers them feel free to comment indicating file names and I'll move spaces within comments to make the formatting cleaner and use comments to force block formatting as I have done for other case where formatting looked bad. BUG= R=efortuna@google.com Review-Url: https://codereview.chromium.org/2771453003 .
136 lines
4.0 KiB
Dart
136 lines
4.0 KiB
Dart
// Copyright (c) 2011, the Dart project authors. Please see the AUTHORS file
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// for details. All rights reserved. Use of this source code is governed by a
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// BSD-style license that can be found in the LICENSE file.
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import "package:expect/expect.dart";
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main() {
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testSplitString();
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testSplitRegExp();
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testSplitPattern();
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}
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testSplit(List expect, String string, Pattern pattern) {
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String patternString;
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if (pattern is String) {
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patternString = '"$pattern"';
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} else if (pattern is RegExp) {
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patternString = "/${pattern.pattern}/";
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} else {
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patternString = pattern.toString();
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}
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Expect.listEquals(
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expect, string.split(pattern), '"$string".split($patternString)');
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}
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/** String patterns. */
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void testSplitString() {
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// Normal match.
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testSplit(["a", "b", "c"], "a b c", " ");
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testSplit(["a", "b", "c"], "adbdc", "d");
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testSplit(["a", "b", "c"], "addbddc", "dd");
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// No match.
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testSplit(["abc"], "abc", " ");
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testSplit(["a"], "a", "b");
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testSplit([""], "", "b");
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// Empty match matches everywhere except start/end.
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testSplit(["a", "b", "c"], "abc", "");
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// All empty parts.
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testSplit(["", "", "", "", ""], "aaaa", "a");
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testSplit(["", "", "", "", ""], " ", " ");
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testSplit(["", ""], "a", "a");
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// No overlapping matches. Match as early as possible.
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testSplit(["", "", "", "a"], "aaaaaaa", "aa");
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// Cannot split the empty string.
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testSplit([], "", ""); // Match.
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testSplit([""], "", "a"); // No match.
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}
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/** RegExp patterns. */
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void testSplitRegExp() {
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testSplitWithRegExp((s) => new RegExp(s));
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}
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/** Non-String, non-RegExp patterns. */
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void testSplitPattern() {
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testSplitWithRegExp((s) => new RegExpWrap(s));
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}
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void testSplitWithRegExp(makePattern) {
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testSplit(["a", "b", "c"], "a b c", makePattern(r" "));
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testSplit(["a", "b", "c"], "adbdc", makePattern(r"[dz]"));
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testSplit(["a", "b", "c"], "addbddc", makePattern(r"dd"));
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testSplit(["abc"], "abc", makePattern(r"b$"));
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testSplit(["a", "b", "c"], "abc", makePattern(r""));
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testSplit(["", "", "", ""], " ", makePattern(r"[ ]"));
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// Non-zero-length match at end.
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testSplit(["aa", ""], "aaa", makePattern(r"a$"));
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// Zero-length match at end.
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testSplit(["aaa"], "aaa", makePattern(r"$"));
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// Non-zero-length match at start.
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testSplit(["", "aa"], "aaa", makePattern(r"^a"));
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// Zero-length match at start.
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testSplit(["aaa"], "aaa", makePattern(r"^"));
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// Picks first match, not longest or shortest.
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testSplit(["", "", "", "a"], "aaaaaaa", makePattern(r"aa|aaa"));
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testSplit(["", "", "", "a"], "aaaaaaa", makePattern(r"aa|"));
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testSplit(["", "", "a"], "aaaaaaa", makePattern(r"aaa|aa"));
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// Zero-width match depending on the following.
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testSplit(["a", "bc"], "abc", makePattern(r"(?=[ab])"));
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testSplit(["a", "b", "c"], "abc", makePattern(r"(?!^)"));
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// Cannot split empty string.
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testSplit([], "", makePattern(r""));
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testSplit([], "", makePattern(r"(?:)"));
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testSplit([], "", makePattern(r"$|(?=.)"));
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testSplit([""], "", makePattern(r"a"));
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// Can split singleton string if it matches.
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testSplit(["", ""], "a", makePattern(r"a"));
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testSplit(["a"], "a", makePattern(r"b"));
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// Do not include captures.
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testSplit(["a", "", "a"], "abba", makePattern(r"(b)"));
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testSplit(["a", "a"], "abba", makePattern(r"(bb)"));
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testSplit(["a", "a"], "abba", makePattern(r"(b*)"));
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testSplit(["a", "a"], "aa", makePattern(r"(b*)"));
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// But captures are still there, and do work with backreferences.
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testSplit(["a", "cba"], "abcba", makePattern(r"([bc])(?=.*\1)"));
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}
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// A Pattern implementation with the same capabilities as a RegExp, but not
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// directly recognizable as a RegExp.
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class RegExpWrap implements Pattern {
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final regexp;
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RegExpWrap(String source) : regexp = new RegExp(source);
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Iterable<Match> allMatches(String string, [int start = 0]) =>
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regexp.allMatches(string, start);
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Match matchAsPrefix(String string, [int start = 0]) =>
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regexp.matchAsPrefix(string, start);
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String toString() => "Wrap(/${regexp.pattern}/)";
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}
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