it("readUAAnalogItem should return an error if not doesn't exist", function (done) {
        var nodeId = "ns=4;s=invalidnode";
        client_utils.readUAAnalogItem(g_session,nodeId,function(err,data ) {
            should(err).not.eql(null);
            done();
        });

    });
    it("readUAAnalogItem should extract all properties of a UAAnalogItem ", function (done) {


        var nodeId = "ns=4;s=TemperatureAnalogItem";
        client_utils.readUAAnalogItem(g_session,nodeId,function(err,data ){

            data.should.have.ownProperty("engineeringUnits");
            data.should.have.ownProperty("engineeringUnitsRange");
            data.should.have.ownProperty("instrumentRange");
            data.should.have.ownProperty("valuePrecision");
            data.should.have.ownProperty("definition");

            done();

        });

    });