property-cast-nan-infinity.js (1035B)
1 // Copyright 2009 the Sputnik authors. All rights reserved. 2 // This code is governed by the BSD license found in the LICENSE file. 3 4 /*--- 5 info: | 6 A property name P (in the form of a string value) is an array index 7 if and only if ToString(ToUint32(P)) is equal to P and ToUint32(P) is not equal to 2^32 - 1 8 es5id: 15.4_A1.1_T2 9 description: Checking for number primitive 10 ---*/ 11 12 var x = []; 13 14 x[NaN] = 1; 15 assert.sameValue(x[0], undefined, 'The value of x[0] is expected to equal undefined'); 16 assert.sameValue(x["NaN"], 1, 'The value of x["NaN"] is expected to be 1'); 17 18 var y = []; 19 y[Number.POSITIVE_INFINITY] = 1; 20 assert.sameValue(y[0], undefined, 'The value of y[0] is expected to equal undefined'); 21 assert.sameValue(y["Infinity"], 1, 'The value of y["Infinity"] is expected to be 1'); 22 23 var z = []; 24 z[Number.NEGATIVE_INFINITY] = 1; 25 assert.sameValue(z[0], undefined, 'The value of z[0] is expected to equal undefined'); 26 assert.sameValue(z["-Infinity"], 1, 'The value of z["-Infinity"] is expected to be 1'); 27 28 reportCompare(0, 0);