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     23 
     24 // 15.4 Array Objects
     25 // (c) 2001 Harri Porten <porten (a] kde.org>
     26 
     27 description(
     28 'This test checks for regression against <a href="https://bugs.webkit.org/show_bug.cgi?id=4147">4147: Array.toString() and toLocaleString() improvements from KDE KJS</a>.'
     29 );
     30 
     31 // backup
     32 var backupNumberToString = Number.prototype.toString;
     33 var backupNumberToLocaleString = Number.prototype.toLocaleString;
     34 var backupRegExpToString = RegExp.prototype.toString;
     35 var backupRegExpToLocaleString = RegExp.prototype.toLocaleString;
     36 
     37 // change functions
     38 Number.prototype.toString = function() { return "toString"; }
     39 Number.prototype.toLocaleString = function() { return "toLocaleString"; }
     40 RegExp.prototype.toString = function() { return "toString2"; }
     41 RegExp.prototype.toLocaleString = function() { return "toLocaleString2"; }
     42 
     43 // the tests
     44 shouldBe("[1].toString()", "'1'");
     45 shouldBe("[1].toLocaleString()", "'toLocaleString'");
     46 Number.prototype.toLocaleString = "invalid";
     47 shouldBe("[1].toLocaleString()", "'1'");
     48 shouldBe("[/r/].toString()", "'toString2'");
     49 shouldBe("[/r/].toLocaleString()", "'toLocaleString2'");
     50 RegExp.prototype.toLocaleString = "invalid";
     51 shouldBe("[/r/].toLocaleString()", "'toString2'");
     52 
     53 var caught = false;
     54 try {
     55 [{ toString : 0 }].toString();
     56 } catch (e) {
     57 caught = true;
     58 }
     59 shouldBeTrue("caught");
     60 
     61 // restore
     62 Number.prototype.toString = backupNumberToString;
     63 Number.prototype.toLocaleString = backupNumberToLocaleString;
     64 RegExp.prototype.toString = backupRegExpToString;
     65 RegExp.prototype.toLocaleString = backupRegExpToLocaleString;
     66