Menu
Problem: ignore some part of the .snap file test results
the question here: there are some components in my test that have a random values and i don't really care about testing them. is there any way to ignore part of my X.snap file? so when i run tests in the future it won't give me test fail results.
863
Snapshot tests are a very useful tool whenever you want to make sure your UI does not change unexpectedly. A typical snapshot test case renders a UI component, takes a snapshot, then compares it to a reference snapshot file stored alongside the test.
"Obsolete" refers to snapshots or snapshot files, for which no . toMatchSnapshot() exists any more. Snapshots are organised in one file per test suite. Single snapshots in those files are stored along with the name of their test, given in jest's it() function.
Note: Alternatively, if you have Jest installed globally, you can run jest --updateSnapshot or jest -u . This will update the snapshots to match the updates you made, and your tests will pass.
To review your snapshots, run npm run jest-html ( yarn run jest-html ). This launches your default browser and opens the jest-html application. By default, jest-html looks for snapshots under **/*. snap,!
Actually, you need to mock the moving parts.
As stated in jest docs:
Your tests should be deterministic. That is, running the same tests multiple times on a component that has not changed should produce the same results every time. You're responsible for making sure your generated snapshots do not include platform specific or other non-deterministic data.
If it's something related to time, you could use
Date.now = jest.fn(() => 1482363367071); If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
