| 'use strict'; |
| |
| module.exports = function (numberIsNaN, t) { |
| t.test('not NaN', function (st) { |
| st.test('primitives', function (sst) { |
| sst.notOk(numberIsNaN(), 'undefined is not NaN'); |
| sst.notOk(numberIsNaN(null), 'null is not NaN'); |
| sst.notOk(numberIsNaN(false), 'false is not NaN'); |
| sst.notOk(numberIsNaN(true), 'true is not NaN'); |
| sst.notOk(numberIsNaN(0), 'positive zero is not NaN'); |
| sst.notOk(numberIsNaN(Infinity), 'Infinity is not NaN'); |
| sst.notOk(numberIsNaN(-Infinity), '-Infinity is not NaN'); |
| sst.notOk(numberIsNaN('foo'), 'string is not NaN'); |
| sst.notOk(numberIsNaN('NaN'), 'string NaN is not NaN'); |
| sst.end(); |
| }); |
| |
| st.notOk(numberIsNaN([]), 'array is not NaN'); |
| st.notOk(numberIsNaN({}), 'object is not NaN'); |
| st.notOk(numberIsNaN(function () {}), 'function is not NaN'); |
| |
| st.test('valueOf', function (vt) { |
| var obj = { valueOf: function () { return NaN; } }; |
| vt.ok(numberIsNaN(Number(obj)), 'object with valueOf of NaN, converted to Number, is NaN'); |
| vt.notOk(numberIsNaN(obj), 'object with valueOf of NaN is not NaN'); |
| vt.end(); |
| }); |
| |
| st.end(); |
| }); |
| |
| t.test('NaN literal', function (st) { |
| st.ok(numberIsNaN(NaN), 'NaN is NaN'); |
| st.end(); |
| }); |
| }; |