October 2015
Beginner
214 pages
4h 30m
English
Content preview from Using WebPageTest
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Chapter 10. Continuous Integration
In software engineering, continuous integration (CI) can be defined as the practice of merging all developer working copies with a shared repository several times a day. It performs automated unit tests in build servers to improve software quality through frequent small efforts.
WebPageTest can be integrated into a CI pipeline to test web pages in the build or staging server. It can be used to indicate when the performance of web pages has regressed. Such integration can be done by customizing the running and reading of tests, as described in Chapter 9.
A common workflow would be to run WebPageTest after the CI pipeline successfully builds and all unit tests pass. Using either polling or pingback to retrieve WebPageTest results, some metrics from the full results set should be compared against expected metrics. For example, data.median.firstView.firstPaint must be less than 800 ms, or data.median.firstView.domElements must be between 800 and 1,000.
In this chapter, you will first learn how to consume WebPageTest API endpoints via the command line or as a Node.js application. You will also learn how to easily automate the whole process of running a test and reading its results in order to integrate with some popular CI tools.
Node.js Wrapper
webpagetest is a Node.js package available on NPM (package manager for Node.js). It provides a wrapper around the WebPageTest RESTful API with the following features:
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Normalizes API endpoints and parameter ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.