Uploaded August 2016 | Updated September 2026, 1 week ago

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SemaphoreCI is a great testing platform primarily because it's blazing fast. In just a few seconds, we'll get continuous testing up and running for our Javascript Project!

SEMAPHORECI: semaphoreci.com

THE CODE:
github.com/willrstern/semtest

THE BLOG POST:
semaphoreci.com/community/tutorials/how-to-test-react-and-mobx-with-jest

The #1 thing that I care about with continuous testing is SPEED. I want my tests to start running immediately and be completed very quickly. Enter SemaphoreCI. I'm not entirely sure how they do it, but they run and complete tests incredibly quickly.

For this sample javascript app with React and MobX with Enzyme and Jest, it takes 45 seconds on my local mac to run npm install and jest. The first time I run tests on SemaphoreCI, the tests complete in 60seconds, which is incredible. Even more amazing is that the continuous integration tests complete 4 times as fast the second time...in 16 seconds! Continuous integration with SemaphoreCI means that pull requests are flagged as ready-to-merge much faster, which means your workflow is far less hindered.

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Also watch: "Tailwind CSS - why CSS utility classes save so much time"
youtube.com/watch?v=oU5ar0dmQEY
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