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nodejs/node_modules/is-nan/test/shimmed.js

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+'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 = function f() {}.name === 'f';
+
+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();
+	});
+
+	require('./tests')(Number.isNaN, t);
+
+	t.end();
+});