Migrated several tests from blink to V8 repository.

test/webkit/regexp-zero-length-alternatives.js

Index: test/webkit/regexp-zero-length-alternatives.js
diff --git a/test/webkit/regexp-zero-length-alternatives.js b/test/webkit/regexp-zero-length-alternatives.js
new file mode 100644
index 0000000000000000000000000000000000000000..6e18de08c78d2e4fa32d2fd2694a680f494bcd4f
--- /dev/null
+++ b/test/webkit/regexp-zero-length-alternatives.js
@@ -0,0 +1,275 @@
+// Copyright 2013 the V8 project authors. All rights reserved.
+// Copyright (C) 2005, 2006, 2007, 2008, 2009 Apple Inc. All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions
+// are met:
+// 1.  Redistributions of source code must retain the above copyright
+//     notice, this list of conditions and the following disclaimer.
+// 2.  Redistributions in binary form must reproduce the above copyright
+//     notice, this list of conditions and the following disclaimer in the
+//     documentation and/or other materials provided with the distribution.
+//
+// THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS'' AND ANY
+// EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
+// WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+// DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS BE LIABLE FOR ANY
+// DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+// (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+// LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON
+// ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+// SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+description(
+'Test regular expression processing with alternatives that match consuming no characters'
+);
+
+var emptyStr = "";
+var s1 = "xxxx";
+var s2 = "aaaa";
+var s3 = "aax";
+var s4 = "abab";
+var s5 = "ab";
+var s6 = "xabx";
+var s7 = "g0";
+
+// Non-capturing empty first alternative greedy '*'
+var re1 = new RegExp(/(?:|a|z)*/);
+shouldBe('emptyStr.match(re1)', '[""]');
+shouldBe('s1.match(re1)', '[""]');
+shouldBe('s2.match(re1)', '["aaaa"]');
+shouldBe('s3.match(re1)', '["aa"]');
+
+// Non-capturing empty middle alternative greedy '*'
+var re2 = new RegExp(/(?:a||z)*/);
+shouldBe('emptyStr.match(re2)', '[""]');
+shouldBe('s1.match(re2)', '[""]');
+shouldBe('s2.match(re2)', '["aaaa"]');
+shouldBe('s3.match(re2)', '["aa"]');
+
+// Non-capturing empty last alternative greedy '*'
+var re3 = new RegExp(/(?:a|z|)*/);
+shouldBe('emptyStr.match(re3)', '[""]');
+shouldBe('s1.match(re3)', '[""]');
+shouldBe('s2.match(re3)', '["aaaa"]');
+shouldBe('s3.match(re3)', '["aa"]');
+
+// Capturing empty first alternative greedy '*'
+var re4 = new RegExp(/(|a|z)*/);
+shouldBe('emptyStr.match(re4)', '["", undefined]');
+shouldBe('s1.match(re4)', '["", undefined]');
+shouldBe('s2.match(re4)', '["aaaa", "a"]');
+shouldBe('s3.match(re4)', '["aa", "a"]');
+
+// Capturing empty middle alternative greedy '*'
+var re5 = new RegExp(/(a||z)*/);
+shouldBe('emptyStr.match(re5)', '["", undefined]');
+shouldBe('s1.match(re5)', '["", undefined]');
+shouldBe('s2.match(re5)', '["aaaa", "a"]');
+shouldBe('s3.match(re5)', '["aa", "a"]');
+
+// Capturing empty last alternative greedy '*'
+var re6 = new RegExp(/(a|z|)*/);
+shouldBe('emptyStr.match(re6)', '["", undefined]');
+shouldBe('s1.match(re6)', '["", undefined]');
+shouldBe('s2.match(re6)', '["aaaa", "a"]');
+shouldBe('s3.match(re6)', '["aa", "a"]');
+
+// Non-capturing empty first alternative fixed-count
+var re7 = new RegExp(/(?:|a|z){2,5}/);
+shouldBe('emptyStr.match(re7)', '[""]');
+shouldBe('s1.match(re7)', '[""]');
+shouldBe('s2.match(re7)', '["aaa"]');
+shouldBe('s3.match(re7)', '["aa"]');
+
+// Non-capturing empty middle alternative fixed-count
+var re8 = new RegExp(/(?:a||z){2,5}/);
+shouldBe('emptyStr.match(re8)', '[""]');
+shouldBe('s1.match(re8)', '[""]');
+shouldBe('s2.match(re8)', '["aaaa"]');
+shouldBe('s3.match(re8)', '["aa"]');
+
+// Non-capturing empty last alternative fixed-count
+var re9 = new RegExp(/(?:a|z|){2,5}/);
+shouldBe('emptyStr.match(re9)', '[""]');
+shouldBe('s1.match(re9)', '[""]');
+shouldBe('s2.match(re9)', '["aaaa"]');
+shouldBe('s3.match(re9)', '["aa"]');
+
+// Non-capturing empty first alternative non-greedy '*'
+var re10 = new RegExp(/(?:|a|z)*?/);
+shouldBe('emptyStr.match(re10)', '[""]');
+shouldBe('s1.match(re10)', '[""]');
+shouldBe('s2.match(re10)', '[""]');
+shouldBe('s3.match(re10)', '[""]');
+
+// Non-capturing empty middle alternative non-greedy '*'
+var re11 = new RegExp(/(?:a||z)*?/);
+shouldBe('emptyStr.match(re11)', '[""]');
+shouldBe('s1.match(re11)', '[""]');
+shouldBe('s2.match(re11)', '[""]');
+shouldBe('s3.match(re11)', '[""]');
+
+// Non-capturing empty last alternative non-greedy '*'
+var re12 = new RegExp(/(?:a|z|)*?/);
+shouldBe('emptyStr.match(re12)', '[""]');
+shouldBe('s1.match(re12)', '[""]');
+shouldBe('s2.match(re12)', '[""]');
+shouldBe('s3.match(re12)', '[""]');
+
+// Capturing empty first alternative non-greedy '*'
+var re13 = new RegExp(/(|a|z)*?/);
+shouldBe('emptyStr.match(re13)', '["", undefined]');
+shouldBe('s1.match(re13)', '["", undefined]');
+shouldBe('s2.match(re13)', '["", undefined]');
+shouldBe('s3.match(re13)', '["", undefined]');
+
+// Capturing empty middle alternative non-greedy '*'
+var re14 = new RegExp(/(a||z)*?/);
+shouldBe('emptyStr.match(re14)', '["", undefined]');
+shouldBe('s1.match(re14)', '["", undefined]');
+shouldBe('s2.match(re14)', '["", undefined]');
+shouldBe('s3.match(re14)', '["", undefined]');
+
+// Capturing empty last alternative non-greedy '*'
+var re15 = new RegExp(/(a|z|)*?/);
+shouldBe('emptyStr.match(re15)', '["", undefined]');
+shouldBe('s1.match(re15)', '["", undefined]');
+shouldBe('s2.match(re15)', '["", undefined]');
+shouldBe('s3.match(re15)', '["", undefined]');
+
+// Non-capturing empty first alternative greedy '?'
+var re16 = new RegExp(/(?:|a|z)?/);
+shouldBe('emptyStr.match(re16)', '[""]');
+shouldBe('s1.match(re16)', '[""]');
+shouldBe('s2.match(re16)', '["a"]');
+shouldBe('s3.match(re16)', '["a"]');
+
+// Non-capturing empty middle alternative greedy '?'
+var re17 = new RegExp(/(?:a||z)?/);
+shouldBe('emptyStr.match(re17)', '[""]');
+shouldBe('s1.match(re17)', '[""]');
+shouldBe('s2.match(re17)', '["a"]');
+shouldBe('s3.match(re17)', '["a"]');
+
+// Non-capturing empty last alternative greedy '?'
+var re18 = new RegExp(/(?:a|z|)?/);
+shouldBe('emptyStr.match(re18)', '[""]');
+shouldBe('s1.match(re18)', '[""]');
+shouldBe('s2.match(re18)', '["a"]');
+shouldBe('s3.match(re18)', '["a"]');
+
+// Capturing empty first alternative greedy '?'
+var re19 = new RegExp(/(|a|z)?/);
+shouldBe('emptyStr.match(re19)', '["", undefined]');
+shouldBe('s1.match(re19)', '["", undefined]');
+shouldBe('s2.match(re19)', '["a", "a"]');
+shouldBe('s3.match(re19)', '["a", "a"]');
+
+// Capturing empty middle alternative greedy '?'
+var re20 = new RegExp(/(a||z)?/);
+shouldBe('emptyStr.match(re20)', '["", undefined]');
+shouldBe('s1.match(re20)', '["", undefined]');
+shouldBe('s2.match(re20)', '["a", "a"]');
+shouldBe('s3.match(re20)', '["a", "a"]');
+
+// Capturing empty last alternative greedy '?'
+var re21 = new RegExp(/(a|z|)?/);
+shouldBe('emptyStr.match(re21)', '["", undefined]');
+shouldBe('s1.match(re21)', '["", undefined]');
+shouldBe('s2.match(re21)', '["a", "a"]');
+shouldBe('s3.match(re21)', '["a", "a"]');
+
+// Non-capturing empty first alternative non-greedy '?'
+var re22 = new RegExp(/(?:|a|z)??/);
+shouldBe('emptyStr.match(re22)', '[""]');
+shouldBe('s1.match(re22)', '[""]');
+shouldBe('s2.match(re22)', '[""]');
+shouldBe('s3.match(re22)', '[""]');
+
+// Non-capturing empty middle alternative non-greedy '?'
+var re23 = new RegExp(/(?:a||z)??/);
+shouldBe('emptyStr.match(re23)', '[""]');
+shouldBe('s1.match(re23)', '[""]');
+shouldBe('s2.match(re23)', '[""]');
+shouldBe('s3.match(re23)', '[""]');
+
+// Non-capturing empty last alternative non-greedy '?'
+var re24 = new RegExp(/(?:a|z|)??/);
+shouldBe('emptyStr.match(re24)', '[""]');
+shouldBe('s1.match(re24)', '[""]');
+shouldBe('s2.match(re24)', '[""]');
+shouldBe('s3.match(re24)', '[""]');
+
+// Capturing empty first alternative non-greedy '?'
+var re25 = new RegExp(/(|a|z)??/);
+shouldBe('emptyStr.match(re25)', '["", undefined]');
+shouldBe('s1.match(re25)', '["", undefined]');
+shouldBe('s2.match(re25)', '["", undefined]');
+shouldBe('s3.match(re25)', '["", undefined]');
+
+// Capturing empty middle alternative non-greedy '?'
+var re26 = new RegExp(/(a||z)??/);
+shouldBe('emptyStr.match(re26)', '["", undefined]');
+shouldBe('s1.match(re26)', '["", undefined]');
+shouldBe('s2.match(re26)', '["", undefined]');
+shouldBe('s3.match(re26)', '["", undefined]');
+
+// Capturing empty last alternative non-greedy '?'
+var re27 = new RegExp(/(a|z|)??/);
+shouldBe('emptyStr.match(re27)', '["", undefined]');
+shouldBe('s1.match(re27)', '["", undefined]');
+shouldBe('s2.match(re27)', '["", undefined]');
+shouldBe('s3.match(re27)', '["", undefined]');
+
+// Non-capturing empty first alternative greedy '*' non-terminal
+var re28 = new RegExp(/(?:|a|z)*x/);
+shouldBe('emptyStr.match(re28)', 'null');
+shouldBe('s1.match(re28)', '["x"]');
+shouldBe('s2.match(re28)', 'null');
+shouldBe('s3.match(re28)', '["aax"]');
+
+// Non-capturing empty middle alternative greedy '*' non-terminal
+var re29 = new RegExp(/(?:a||z)*x/);
+shouldBe('emptyStr.match(re29)', 'null');
+shouldBe('s1.match(re29)', '["x"]');
+shouldBe('s2.match(re29)', 'null');
+shouldBe('s3.match(re29)', '["aax"]');
+
+// Non-capturing empty last alternative greedy '*' non-terminal
+var re30 = new RegExp(/(?:a|z|)*x/);
+shouldBe('emptyStr.match(re30)', 'null');
+shouldBe('s1.match(re30)', '["x"]');
+shouldBe('s2.match(re30)', 'null');
+shouldBe('s3.match(re30)', '["aax"]');
+
+// Non-capturing two possibly empty alternatives greedy '*'
+var re31 = new RegExp(/(?:a*|b*)*/);
+shouldBe('emptyStr.match(re31)', '[""]');
+shouldBe('s1.match(re31)', '[""]');
+shouldBe('s3.match(re31)', '["aa"]');
+shouldBe('s4.match(re31)', '["abab"]');
+
+// Non-capturing two possibly empty non-greedy alternatives non-greedy '*'
+var re32 = new RegExp(/(?:a*?|b*?)*/);
+shouldBe('emptyStr.match(re32)', '[""]');
+shouldBe('s1.match(re32)', '[""]');
+shouldBe('s2.match(re32)', '["aaaa"]');
+shouldBe('s4.match(re32)', '["abab"]');
+shouldBe('s5.match(re32)', '["ab"]');
+shouldBe('s6.match(re32)', '[""]');
+
+// Three possibly empty alternatives with greedy +
+var re33 = new RegExp(/(?:(?:(?!))|g?|0*\*?)+/);
+shouldBe('emptyStr.match(re33)', '[""]');
+shouldBe('s1.match(re33)', '[""]');
+shouldBe('s7.match(re33)', '["g0"]');
+
+// first alternative zero length fixed count
+var re34 = new RegExp(/(?:|a)/);
+shouldBe('emptyStr.match(re34)', '[""]');
+shouldBe('s1.match(re34)', '[""]');
+shouldBe('s2.match(re34)', '[""]');
+shouldBe('s3.match(re34)', '[""]');
+