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Elixir Conf 2016

This presentation, by Chris Keathley, is licensed under a Creative Commons Attribution ShareAlike 3.0
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Feature tests are one of the best ways to ensure reliability and consistency for web applications. But, as your test suite grows feature tests can become a performance bottleneck. This leads to developers running their tests less often or only on the continuos integration server. In some cases it means avoiding feature tests altogether. Luckily, the release of Ecto 2.0 means that its now possible to run concurrent browser tests. Wallaby is a tool designed to take full advantage of that. In this talk we'll look at how to configure a Phoenix application for concurrent testing, give a brief overview of Wallaby, and showcase how we can use data transformation and composition to quickly build a highly concurrent test suite.

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