Mock Deep Testing: Toward Separate Development of Data and Models for Deep Learning

• URL: http://arxiv.org/abs/2502.07712v1
• Date: Tue, 11 Feb 2025 17:11:11 GMT
• Title: Mock Deep Testing: Toward Separate Development of Data and Models for Deep Learning
• Authors: Ruchira Manke, Mohammad Wardat, Foutse Khomh, Hridesh Rajan,
• Abstract summary: This research introduces our methodology of mock deep testing for unit testing of deep learning applications. To enable unit testing, we introduce a design paradigm that decomposes the workflow into distinct, manageable components. We have developed KUnit, a framework for enabling mock deep testing for the Keras library.
• Score: 21.563130049562357
• License:
• Abstract: While deep learning (DL) has permeated, and become an integral component of many critical software systems, today software engineering research hasn't explored how to separately test data and models that are integral for DL approaches to work effectively. The main challenge in independently testing these components arises from the tight dependency between data and models. This research explores this gap, introducing our methodology of mock deep testing for unit testing of DL applications. To enable unit testing, we introduce a design paradigm that decomposes the workflow into distinct, manageable components, minimizes sequential dependencies, and modularizes key stages of the DL. For unit testing these components, we propose modeling their dependencies using mocks. This modular approach facilitates independent development and testing of the components, ensuring comprehensive quality assurance throughout the development process. We have developed KUnit, a framework for enabling mock deep testing for the Keras library. We empirically evaluated KUnit to determine the effectiveness of mocks. Our assessment of 50 DL programs obtained from Stack Overflow and GitHub shows that mocks effectively identified 10 issues in the data preparation stage and 53 issues in the model design stage. We also conducted a user study with 36 participants using KUnit to perceive the effectiveness of our approach. Participants using KUnit successfully resolved 25 issues in the data preparation stage and 38 issues in the model design stage. Our findings highlight that mock objects provide a lightweight emulation of the dependencies for unit testing, facilitating early bug detection. Lastly, to evaluate the usability of KUnit, we conducted a post-study survey. The results reveal that KUnit is helpful to DL application developers, enabling them to independently test each component effectively in different stages.

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