Hi, in unit tests we compare 2 JsonObjects (from `kotlinx.serialization.json`) but in some cases we'...

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[Laurent Thiebaud]

Hi, in unit tests we compare 2 JsonObjects (from kotlinx.serialization.json) but in some cases we'd like to ignore some keys (generated IDs, timestamps...)
Today we have a simple

assertEquals(object1, object2)

Do you see any way to ignore a key / or remove a key from a JsonObject before the comparison?

[Rob Elliot]

Use a different assertion library. e.g. kotest's assertion library:
https://kotest.io/docs/assertions/json/content-json-matchers.html#shouldequalspecifiedjson

You don't need to use the framework to use an assertion library; so long as it throws AssertionError if an assertion fails it will work in JUnit or whatever.

[Rob Elliot]

JsonUnit is another option

[Laurent Thiebaud]

Thanks @Rob Elliot! Actually we also use kotest, but I don't see how shouldEqualSpecifiedJson / lenient comparison could help?

[Rob Elliot]

I assumed you were specifying the expected side of the comparison explicitly, so could just leave out the fields you don't care about.

If you are comparing two objects which both have the fields you want to ignore then JsonUnit's Ignoring paths might work?

[Adam S]

It's possible to remove keys from JsonObjects, although it's not obvious. See https://github.com/Kotlin/kotlinx.serialization/issues/2308