biomedjs/node_modules/moment/test/moment/is_moment.js

var moment = require('../../moment');

exports.is_moment = {
    "is moment object": function(test) {
        test.expect(11);

        var MyObj = function() {};
        MyObj.prototype.toDate = function() {
            return new Date();
        }

        test.ok(moment.isMoment(moment()), 'simple moment object');
        test.ok(moment.isMoment(moment('invalid date')), 'invalid moment object');

        test.ok(!moment.isMoment(new MyObj()), 'myObj is not moment object');
        test.ok(!moment.isMoment(moment), 'moment function is not moment object');
        test.ok(!moment.isMoment(new Date()), 'date object is not moment object');
        test.ok(!moment.isMoment(Object), 'Object is not moment object');
        test.ok(!moment.isMoment('foo'), 'string is not moment object');
        test.ok(!moment.isMoment(1), 'number is not moment object');
        test.ok(!moment.isMoment(NaN), 'NaN is not moment object');
        test.ok(!moment.isMoment(null), 'null is not moment object');
        test.ok(!moment.isMoment(undefined), 'undefined is not moment object');

        test.done();
    }
};