Oracles in real time: data visualization on the command line (Noah Sussman, USA)
Test Oracles address a mutex problem that is faced by all teams who *successfully* practice continuous deployment. The problem test oracles address is: once your tests have run, and you have the results, how do you know what that means? In other words, what are you testing? What do your tests tell you? How do you know what you know?
Command line tools provide powerful data analytics when applied to a mature CI system and deployment pipeline. Such systems are known to be opaque — but the GNU/bash command line environment is powerful enough to solve those problems (with a little help from HTML5!).
A healthy CI system and deployment pipeline will naturally accrue a wealth of filesystem artifacts which can be mined for Test Oracles using command-line tools. Topics covered in depth will include:
• JSON testing and transformation with jq.
• Jenkins monitoring tips.
• Network analysis tools for Selenium developers.
• Visualizing xUnit test runner output.
• Analyzing your captured screenshots.
• Tips on introducin
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