v8/test/mjsunit/object-literal-conversions.js

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// Test that the various conversions between property names are correctly
// used when overwriting initializers.

var test1 = { 13: 6, "13": 7 };
var test2 = { 13: 7, "13.0": 6 };
var test3 = { "13": 6, 13.0000000000000000: 7 };
var test4 = { 13.213000: 6, "13.213": 7 };

assertEquals(7, test1[13]);
assertEquals(7, test2[13]);
assertEquals(7, test3[13]);
assertEquals(7, test4[13.213]);

var test5 = { 13: function() {}, "13": 7 };
var test6 = { 17.31: function() {}, "17.31": 7 };

assertEquals(7, test5[13]);
assertEquals(7, test6[17.31]);