Show HN: Lost Pixel – open-source visual regression testing for your frontend

Re:Show HN: Lost Pixel – open-source visual regression testi... by divdev_ on Monday September 19, 2022 @12:16PM (#32900337)

We don’t at the moment differentiate, but it is definitely a feature on the roadmap. There are multiple ways to solve this and we are considering quite some of them:

1. Grayscaling browser before screenshot 2. Using custom diffing engines that enable for ignoring regions like odiff 3. Trying to be smart and analyzing images with machine learning to identify how meaningful the difference is (moonshot but worth exploring)

Our approach to this in general is that if false positive like this happens we can just batch approve all the differences and be ok with that as it was a subtle rendering change not dependent on us or our direct third party dependencies.

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Re:Show HN: Lost Pixel – open-source visual regression testi... by testingwaters4 on Tuesday September 20, 2022 @02:47AM (#32908506)

You could run the suite on the updated browser on the latest passed build, then automatically batch approve since you know it has to be green. Now you can run all the newest test suites in this updated browser against this approved build.

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Re:Show HN: Lost Pixel – open-source visual regression testi... by divdev_ on Tuesday September 20, 2022 @04:32AM (#32909124)

exactly this is the current workflow for many people who are using visual regression tests!

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