blob: d6103b32a8841a781111419e35323aa6ece1bb5a [file] [log] [blame]
/// Copyright (c) 2009 Microsoft Corporation
///
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/// the following disclaimer.
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ES5Harness.registerTest( {
id: "15.4.4.14-4-7",
path: "TestCases/chapter15/15.4/15.4.4/15.4.4.14/15.4.4.14-4-7.js",
description: "Array.prototype.indexOf returns -1 if 'length' is 0 ( length is object overridden with obj w/o valueOf (toString))",
test: function testcase() {
// objects inherit the default valueOf method of the Object object;
// that simply returns the itself. Since the default valueOf() method
// does not return a primitive value, ES next tries to convert the object
// to a number by calling its toString() method and converting the
// resulting string to a number.
var i = Array.prototype.indexOf.call({length: { toString: function () { return '0';}}}, 1);
if (i === -1) {
return true;
}
},
precondition: function prereq() {
return fnExists(Array.prototype.lastIndexOf);
}
});