NDLI: Results from an Ethnographically-informed Study in the Context of Test Driven Development

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Results from an Ethnographically-informed Study in the Context of Test Driven Development

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Results from an Ethnographically-informed Study in the Context of Test Driven Development

Content Provider	ACM Digital Library
Author	Juristo, Natalia Scanniello, Giuseppe Turhan, Burak Fucci, Davide Romano, Simone
Abstract	Background: Test-driven development (TDD) is an iterative software development technique where unit tests are defined before production code. Previous studies fail to analyze the values, beliefs, and assumptions that inform and shape TDD. Aim: We designed and conducted a qualitative study to understand the values, beliefs, and assumptions of TDD. In particular, we sought to understand how novice and professional software developers, arranged in pairs (a driver and a pointer), perceive and apply TDD. Method: 14 novice software developers, i.e., graduate students in Computer Science at the University of Basilicata, and six professional software developers (with one to 10 years work experience) participated in our ethnographically informed study. We asked the participants to implement a new feature for an existing software written in Java. We immersed ourselves in the context of the study, and collected data by means of contemporaneous field notes, audio recordings, and other artifacts. Results: A number of insights emerge from our analysis of the collected data, the main ones being: (i) refactoring (one of the phases of TDD) is not performed as often as the process requires and it is considered less important than other phases, (ii) the most important phase is implementation, (iii) unit tests are almost never up-to-date, (iv) participants first build a sort of mental model of the source code to be implemented and only then write test cases on the basis of this model; and (v) apart from minor differences, professional developers and students applied TDD in a similar fashion. Conclusions: Developers write quick-and-dirty production code to pass the tests and ignore refactoring.
Starting Page	1
Ending Page	10
Page Count	10
File Format	PDF
ISBN	9781450336918
DOI	10.1145/2915970.2915996
Language	English
Publisher	Association for Computing Machinery (ACM)
Publisher Date	2016-06-01
Publisher Place	New York
Access Restriction	Subscribed
Subject Keyword	Ethnographically-informed study Qualitative study Test driven development
Content Type	Text
Resource Type	Article

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