| 1 | 'use strict';
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| 2 |
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| 3 | var isNaN = require('../src/nan'),
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| 4 | assert = require('chai').assert;
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| 5 |
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| 6 | describe('NaN', function() {
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| 7 | it('returns true if value is NaN', function() {
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| 8 | assert.ok(isNaN(NaN));
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| 9 | assert.ok(isNaN(new Number(NaN)));
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| 10 | assert.ok(isNaN(new Number(undefined)));
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| 11 | });
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| 12 |
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| 13 | it('returns false if value is not NaN', function() {
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| 14 | assert.ok(isNaN(1) === false);
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| 15 | assert.ok(isNaN(undefined) === false);
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| 16 | assert.ok(isNaN({}) === false);
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| 17 | assert.ok(isNaN(new Number()) === false);
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| 18 | })
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| 19 | });
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