test with dynamic data?

[lucy7099]

is there any way to test pages with dynamic data that can cause diffs when the data changes between snapshots?

i think with percyscript you can do this by intercepting the network request and sending a mocked response instead. But is it possible to do this with the snapshot CLI

thanks

[Robdel12]

Hey @lucy7099!

i think with percyscript you can do this by intercepting the network request and sending a mocked response instead

For something like that you'll want to use the Puppeteer SDK: https://docs.percy.io/docs/puppeteer The PercyScript SDK was a really thin wrapper around Puppeteer, so the same method would translate 😃

[cancan101]

Similar question for a more constrained use case, is there any way to freeze the datetime used in testing?

[wwilsman]

With the snapshot command, you'd have to inject javascript into the page to freeze/adjust the dates. For SDKs that integrate with test frameworks, there are some mocking libraries available: https://docs.percy.io/docs/freezing-dynamic-data

[cancan101]

I ended up using the faketime pre-loader to solve this problem. I am able to install on github actions with a simple apt-get install faketime.

Then I can just run:

faketime 2021-08-17 20:30:00 yarn ci:visual-regression