# Dfuntest: A Testing Framework for Distributed Applications

## TL;DR

Dfuntest is a flexible testing framework for distributed applications that automates experiments across various infrastructures, enabling robust functional and performance testing with minimal setup.

## Contribution

It introduces dfuntest, a novel framework that simplifies testing and verifying distributed systems through abstractions and automation, similar to jUnit for distributed environments.

## Key findings

- Successfully deployed DHT prototype on 60 PlanetLab nodes
- Verified correctness of the distributed topology
- Demonstrated flexibility across different infrastructures

## Abstract

New ideas in distributed systems (algorithms or protocols) are commonly tested by simulation, because experimenting with a prototype deployed on a realistic platform is cumbersome. However, a prototype not only measures performance but also verifies assumptions about the underlying system. We developed dfuntest - a testing framework for distributed applications that defines abstractions and test structure, and automates experiments on distributed platforms. Dfuntest aims to be jUnit's analogue for distributed applications; a framework that enables the programmer to write robust and flexible scenarios of experiments. Dfuntest requires minimal bindings that specify how to deploy and interact with the application. Dfuntest's abstractions allow execution of a scenario on a single machine, a cluster, a cloud, or any other distributed infrastructure, e.g. on PlanetLab. A scenario is a procedure; thus, our framework can be used both for functional tests and for performance measurements. We show how to use dfuntest to deploy our DHT prototype on 60 PlanetLab nodes and verify whether the prototype maintains a correct topology.