michael@0: // Copyright 2009 the Sputnik authors.  All rights reserved.
michael@0: // This code is governed by the BSD license found in the LICENSE file.
michael@0: 
michael@0: /**
michael@0:  * Operator x - y produces the same result as x + (-y)
michael@0:  *
michael@0:  * @path ch11/11.6/11.6.2/S11.6.2_A4_T1.js
michael@0:  * @description If either operand is NaN, the result is NaN
michael@0:  */
michael@0: 
michael@0: //CHECK#1
michael@0: if (isNaN(Number.NaN - 1) !== true ) {
michael@0:   $ERROR('#1: NaN - 1 === Not-a-Number. Actual: ' + (NaN - 1));
michael@0: }
michael@0: 
michael@0: //CHECK#2
michael@0: if (isNaN(1 - Number.NaN) !== true ) {
michael@0:   $ERROR('#2: 1 - NaN === Not-a-Number. Actual: ' + (1 - NaN));
michael@0: }
michael@0: 
michael@0: //CHECK#3
michael@0: if (isNaN(Number.NaN - Number.POSITIVE_INFINITY) !== true ) {
michael@0:   $ERROR('#3: NaN - Infinity === Not-a-Number. Actual: ' + (NaN - Infinity));
michael@0: }
michael@0: 
michael@0: //CHECK#4
michael@0: if (isNaN(Number.POSITIVE_INFINITY - Number.NaN) !== true ) {
michael@0:   $ERROR('#4: Infinity - NaN === Not-a-Number. Actual: ' + (Infinity - NaN));
michael@0: }
michael@0: 
michael@0: //CHECK#5
michael@0: if (isNaN(Number.NaN - Number.NEGATIVE_INFINITY) !== true ) {
michael@0:   $ERROR('#5: NaN - Infinity === Not-a-Number. Actual: ' + (NaN - Infinity));
michael@0: }
michael@0: 
michael@0: //CHECK#6
michael@0: if (isNaN(Number.NEGATIVE_INFINITY - Number.NaN) !== true ) {
michael@0:   $ERROR('#6: Infinity - NaN === Not-a-Number. Actual: ' + (Infinity - NaN));
michael@0: }
michael@0: