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Diffstat (limited to 'js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-7.js')
-rw-r--r-- | js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-7.js | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-7.js b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-7.js new file mode 100644 index 0000000000..427740b352 --- /dev/null +++ b/js/src/tests/test262/built-ins/Array/prototype/lastIndexOf/15.4.4.15-4-7.js @@ -0,0 +1,39 @@ +// Copyright (c) 2012 Ecma International. All rights reserved. +// This code is governed by the BSD license found in the LICENSE file. + +/*--- +esid: sec-array.prototype.lastindexof +description: > + Array.prototype.lastIndexOf returns -1 if 'length' is 0 ( length + is object overridden with obj w/o valueOf (toString)) +---*/ + +foo.prototype = new Array(1, 2, 3); + +function foo() {} +var f = new foo(); + +var o = { + toString: function() { + return '0'; + } +}; +f.length = o; + +// 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.lastIndexOf.call({ + length: { + toString: function() { + return '0'; + } + } +}, 1); + + +assert.sameValue(i, -1, 'i'); + +reportCompare(0, 0); |