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| <html> |
| <head> |
| <meta charset="utf-8"> |
| <title>Object.prototype.hasOwnProperty: Check prototype chain</title> |
| <link rel="author" title="Masaya Iseki" href="mailto:iseki.m.aa@gmail.com"> |
| <link rel="help" href="https://people.mozilla.org/~jorendorff/es6-draft.html#sec-object.prototype.hasownproperty"> |
| <script src=/resources/testharness.js></script> |
| <script src=/resources/testharnessreport.js></script> |
| <script> |
| test(function() { |
| [{}, []].forEach(function(that) { |
| that.prop = 'exists'; |
| assert_true(that.hasOwnProperty('prop')); |
| assert_true('hasOwnProperty' in that); |
| assert_false(that.hasOwnProperty('hasOwnProperty')); |
| }); |
| }); |
| |
| test(function() { |
| ['foo', 42].forEach(function(that) { |
| assert_false(that.hasOwnProperty('hasOwnProperty')); |
| }); |
| }); |
| |
| test(function() { |
| [null, undefined].forEach(function(that) { |
| assert_throws(new TypeError(), |
| function() { that.hasOwnProperty('hasOwnProperty'); }); |
| }); |
| }); |
| </script> |
| |
| </body> |
| </html> |
