Edit in JSFiddle

describe('toBeDefined', function() {
    it('passes if subject is not undefined', function() {
        var obj = { foo: function() {} }
        expect(obj).toBeDefined();
        expect(obj.foo).toBeDefined();      
    });

    it('fails if subject is undefined', function() {
        var obj = {};
        expect(obj.foo).not.toBeDefined();
        expect(undefined).not.toBeDefined();
    });
});

execJasmine();