v8/test/mjsunit/string-slices-regexp.js

// Copyright 2011 the V8 project authors. All rights reserved.
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var foo = "lsdfj sldkfj sdklfj læsdfjl sdkfjlsdk fjsdl fjsdljskdj flsj flsdkj flskd regexp: /foobar/\nldkfj sdlkfj sdkl";
for(var i = 0; i < 1000; i++) {
  assertTrue(/^([a-z]+): (.*)/.test(foo.substring(foo.indexOf("regexp:"))));
  assertEquals("regexp", RegExp.$1, "RegExp.$1");
}

var re = /^(((N({)?)|(R)|(U)|(V)|(B)|(H)|(n((n)|(r)|(v)|(h))?)|(r(r)?)|(v)|(b((n)|(b))?)|(h))|((Y)|(A)|(E)|(o(u)?)|(p(u)?)|(q(u)?)|(s)|(t)|(u)|(w)|(x(u)?)|(y)|(z)|(a((T)|(A)|(L))?)|(c)|(e)|(f(u)?)|(g(u)?)|(i)|(j)|(l)|(m(u)?)))+/;
var r = new RegExp(re)
var str = "_Avtnennan gunzvmu pubExnY nEvln vaTxh rmuhguhaTxnY_".slice(1,-1);
str = str + str;
assertTrue(r.test(str));
assertTrue(r.test(str));
var re = /x/;
assertEquals("a.yb", "_axyb_".slice(1,-1).replace(re, "."));
re.compile("y");
assertEquals("ax.b", "_axyb_".slice(1,-1).replace(re, "."));
re.compile("(x)");
assertEquals(["x", "x"], re.exec("_axyb_".slice(1,-1)));
re.compile("(y)");
assertEquals(["y", "y"], re.exec("_axyb_".slice(1,-1)));

for(var i = 0; i < 100; i++) {
  var a = "aaaaaaaaaaaaaaaaaaaaaaaabbaacabbabaaaaabbaaaabbac".slice(24,-1);
  var b = "bbaacabbabaaaaabbaaaabba" + a;
  // The first time, the cons string will be flattened and handled by the
  // runtime system.
  assertEquals(["bbaa", "a", "", "a"], /((\3|b)\2(a)){2,}/.exec(b));
  // The second time, the cons string is already flattened and will be
  // handled by generated code.
  assertEquals(["bbaa", "a", "", "a"], /((\3|b)\2(a)){2,}/.exec(b));
  assertEquals(["bbaa", "a", "", "a"], /((\3|b)\2(a)){2,}/.exec(a));
  assertEquals(["bbaa", "a", "", "a"], /((\3|b)\2(a)){2,}/.exec(a));
}

var c = "ABCDEFGHIJKLMN".slice(2,-2);
var d = "ABCDEF\u1234GHIJKLMN".slice(2,-2);
var e = "ABCDEFGHIJKLMN".slice(0,-2);
assertTrue(/^C.*L$/.test(c));
assertTrue(/^C.*L$/.test(c));
assertTrue(/^C.*L$/.test(d));
assertTrue(/^C.*L$/.test(d));
assertTrue(/^A\w{10}L$/.test(e));
assertTrue(/^A\w{10}L$/.test(e));

var e = "qui-opIasd-fghjklzx-cvbn-mqwer-tyuio-pasdf-ghIjkl-zx".slice(6,-6);
var e_split = e.split("-");
assertEquals(e_split[0], "Iasd");
assertEquals(e_split[1], "fghjklzx");
assertEquals(e_split[6], "ghI");