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1 // Copyright 2009 the Sputnik authors. All rights reserved. |
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2 // This code is governed by the BSD license found in the LICENSE file. |
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3 |
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4 /** |
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5 * Operator x - y produces the same result as x + (-y) |
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6 * |
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7 * @path ch11/11.6/11.6.2/S11.6.2_A4_T5.js |
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8 * @description Using the rule of sum of two zeroes and the fact that a - b = a + (-b) |
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9 */ |
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10 |
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11 //CHECK#1 |
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12 if (-0 - -0 !== 0 ) { |
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13 $ERROR('#1.1: -0 - -0 === 0. Actual: ' + (-0 - -0)); |
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14 } else { |
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15 if (1 / (-0 - -0) !== Number.POSITIVE_INFINITY) { |
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16 $ERROR('#1.2: -0 - -0 === + 0. Actual: -0'); |
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17 } |
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18 } |
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19 |
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20 //CHECK#2 |
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21 if (0 - -0 !== 0 ) { |
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22 $ERROR('#2.1: 0 - -0 === 0. Actual: ' + (0 - -0)); |
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23 } else { |
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24 if (1 / (0 - -0) !== Number.POSITIVE_INFINITY) { |
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25 $ERROR('#2.2: 0 - -0 === + 0. Actual: -0'); |
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26 } |
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27 } |
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28 |
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29 //CHECK#3 |
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30 if (-0 - 0 !== -0 ) { |
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31 $ERROR('#3.1: -0 - 0 === 0. Actual: ' + (-0 - 0)); |
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32 } else { |
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33 if (1 / (-0 - 0) !== Number.NEGATIVE_INFINITY) { |
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34 $ERROR('#3.2: -0 - 0 === - 0. Actual: +0'); |
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35 } |
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36 } |
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37 |
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38 //CHECK#4 |
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39 if (0 - 0 !== 0 ) { |
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40 $ERROR('#4.1: 0 - 0 === 0. Actual: ' + (0 - 0)); |
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41 } else { |
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42 if (1 / (0 - 0) !== Number.POSITIVE_INFINITY) { |
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43 $ERROR('#4.2: 0 - 0 === + 0. Actual: -0'); |
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44 } |
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45 } |
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46 |