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1 year ago
'use strict';
require('es5-shim');
var numberIsNaN = require('../');
numberIsNaN.shim();
var test = require('tape');
var defineProperties = require('define-properties');
var isEnumerable = Object.prototype.propertyIsEnumerable;
var functionsHaveNames = require('functions-have-names')();
var runTests = require('./tests');
test('shimmed', function (t) {
t.equal(Number.isNaN.length, 1, 'Number.isNaN has a length of 1');
t.test('Function name', { skip: !functionsHaveNames }, function (st) {
st.equal(Number.isNaN.name, 'isNaN', 'Number.isNaN has name "isNaN"');
st.end();
});
t.test('enumerability', { skip: !defineProperties.supportsDescriptors }, function (et) {
et.equal(false, isEnumerable.call(Number, 'isNaN'), 'Number.isNaN is not enumerable');
et.end();
});
runTests(Number.isNaN, t);
t.end();
});