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/*
* Any copyright is dedicated to the Public Domain.
*/
var BUGNUMBER = 646490;
var summary =
"RegExp.prototype.exec doesn't get the lastIndex and ToInteger() it for " +
"non-global regular expressions when it should";
print(BUGNUMBER + ": " + summary);
/**************
* BEGIN TEST *
**************/
function expectThrowTypeError(fun)
{
try
{
var r = fun();
throw new Error("didn't throw TypeError, returned " + r);
}
catch (e)
{
assertEq(e instanceof TypeError, true,
"didn't throw TypeError, got: " + e);
}
}
function checkExec(description, regex, args, obj)
{
var lastIndex = obj.lastIndex;
var index = obj.index;
var input = obj.input;
var indexArray = obj.indexArray;
var res = regex.exec.apply(regex, args);
assertEq(Array.isArray(res), true, description + ": not an array");
assertEq(regex.lastIndex, lastIndex, description + ": wrong lastIndex");
assertEq(res.index, index, description + ": wrong index");
assertEq(res.input, input, description + ": wrong input");
assertEq(res.length, indexArray.length, description + ": wrong length");
for (var i = 0, sz = indexArray.length; i < sz; i++)
assertEq(res[i], indexArray[i], description + " " + i + ": wrong index value");
}
var exec = RegExp.prototype.exec;
var r, res, called, obj;
/* 1. Let R be this RegExp object. */
expectThrowTypeError(function() { exec.call(null); });
expectThrowTypeError(function() { exec.call(""); });
expectThrowTypeError(function() { exec.call(5); });
expectThrowTypeError(function() { exec.call({}); });
expectThrowTypeError(function() { exec.call([]); });
expectThrowTypeError(function() { exec.call(); });
expectThrowTypeError(function() { exec.call(true); });
expectThrowTypeError(function() { exec.call(Object.create(RegExp.prototype)); });
expectThrowTypeError(function() { exec.call(Object.create(/a/)); });
/* 2. Let S be the value of ToString(string). */
called = false;
r = /a/;
assertEq(r.lastIndex, 0);
checkExec("/a/", r, [{ toString: function() { called = true; return 'ba'; } }],
{ lastIndex: 0,
index: 1,
input: "ba",
indexArray: ["a"] });
assertEq(called, true);
called = false;
try
{
res = r.exec({ toString: null, valueOf: function() { called = true; throw 17; } });
throw new Error("didn't throw");
}
catch (e)
{
assertEq(e, 17);
}
assertEq(called, true);
called = false;
obj = r.lastIndex = { valueOf: function() { assertEq(true, false, "shouldn't have been called"); } };
try
{
res = r.exec({ toString: null, valueOf: function() { assertEq(called, false); called = true; throw 17; } });
throw new Error("didn't throw");
}
catch (e)
{
assertEq(e, 17);
}
assertEq(called, true);
assertEq(r.lastIndex, obj);
// We don't test lack of an argument because of RegExp statics non-standard
// behaviors overriding what really should happen for lack of an argument, sigh.
/*
* 3. Let length be the length of S.
* 4. Let lastIndex be the result of calling the [[Get]] internal method of R with argument "lastIndex".
* 5. Let i be the value of ToInteger(lastIndex).
*/
r = /b/;
r.lastIndex = { valueOf: {}, toString: {} };
expectThrowTypeError(function() { r.exec("foopy"); });
r.lastIndex = { valueOf: function() { throw new TypeError(); } };
expectThrowTypeError(function() { r.exec("foopy"); });
/*
* 6. Let global be the result of calling the [[Get]] internal method of R with argument "global".
* 7. If global is false, then let i = 0.
*/
obj = { valueOf: function() { return 5; } };
r = /abc/;
r.lastIndex = obj;
checkExec("/abc/ take one", r, ["abc-------abc"],
{ lastIndex: obj,
index: 0,
input: "abc-------abc",
indexArray: ["abc"] });
checkExec("/abc/ take two", r, ["abc-------abc"],
{ lastIndex: obj,
index: 0,
input: "abc-------abc",
indexArray: ["abc"] });
/*
* 8. Let matchSucceeded be false.
* 9. Repeat, while matchSucceeded is false
* a. If i < 0 or i > length, then
* i. Call the [[Put]] internal method of R with arguments "lastIndex", 0, and true.
* ii. Return null.
* b. Call the [[Match]] internal method of R with arguments S and i.
* c. If [[Match]] returned failure, then
* i. Let i = i+1.
* d. else
* i. Let r be the State result of the call to [[Match]].
* ii. Set matchSucceeded to true.
* e. Let i = i+1.
*/
r = /abc()?/;
r.lastIndex = -5;
checkExec("/abc()?/ with lastIndex -5", r, ["abc-------abc"],
{ lastIndex: -5,
index: 0,
input: "abc-------abc",
indexArray: ["abc", undefined] });
r = /abc/;
r.lastIndex = -17;
res = r.exec("cdefg");
assertEq(res, null);
assertEq(r.lastIndex, -17);
r = /abc/g;
r.lastIndex = -42;
res = r.exec("cdefg");
assertEq(res, null);
assertEq(r.lastIndex, 0);
/*
* 10. Let e be r's endIndex value.
* 11. If global is true,
* a. Call the [[Put]] internal method of R with arguments "lastIndex", e, and true.
*/
r = /abc/g;
r.lastIndex = 17;
assertEq(r.exec("sdfs"), null);
assertEq(r.lastIndex, 0);
r = /abc/g;
r.lastIndex = 2;
checkExec("/abc/g", r, ["00abc"],
{ lastIndex: 5,
index: 2,
input: "00abc",
indexArray: ["abc"] });
r = /a(b)c/g;
r.lastIndex = 2;
checkExec("/a(b)c/g take two", r, ["00abcd"],
{ lastIndex: 5,
index: 2,
input: "00abcd",
indexArray: ["abc", "b"] });
/*
* 12. Let n be the length of r's captures array. (This is the same value as
* 15.10.2.1's NCapturingParens.)
* 13. Let A be a new array created as if by the expression new Array() where
* Array is the standard built-in constructor with that name.
* 14. Let matchIndex be the position of the matched substring within the
* complete String S.
* 15. Call the [[DefineOwnProperty]] internal method of A with arguments
* "index", Property Descriptor {[[Value]]: matchIndex, [[Writable]: true,
* [[Enumerable]]: true, [[Configurable]]: true}, and true.
* 16. Call the [[DefineOwnProperty]] internal method of A with arguments
* "input", Property Descriptor {[[Value]]: S, [[Writable]: true,
* [[Enumerable]]: true, [[Configurable]]: true}, and true.
* 17. Call the [[DefineOwnProperty]] internal method of A with arguments
* "length", Property Descriptor {[[Value]]: n + 1}, and true.
* 18. Let matchedSubstr be the matched substring (i.e. the portion of S
* between offset i inclusive and offset e exclusive).
* 19. Call the [[DefineOwnProperty]] internal method of A with arguments "0",
* Property Descriptor {[[Value]]: matchedSubstr, [[Writable]: true,
* [[Enumerable]]: true, [[Configurable]]: true}, and true.
* 20. For each integer i such that I > 0 and I ≤ n
* a. Let captureI be i th element of r's captures array.
* b. Call the [[DefineOwnProperty]] internal method of A with arguments
* ToString(i), Property Descriptor {[[Value]]: captureI, [[Writable]:
* true, [[Enumerable]]: true, [[Configurable]]: true}, and true.
* 21. Return A.
*/
// throughout, above (and in other tests)
/******************************************************************************/
if (typeof reportCompare === "function")
reportCompare(true, true);
print("All tests passed!");