Is there a form of `Map<K, V>.shouldContainAll(expected: Map<K, V>)` which recurses into...

# kotest

[Rob Elliot]

Is there a form of Map<K, V>.shouldContainAll(expected: Map<K, V>) which recurses into any maps in the top level structure?

[Rob Elliot]

I'd like this to pass:

mapOf(
      "1" to "1",
      "2" to mapOf(
        "2.1" to "2.1",
        "2.2" to "2.2",
      )
    ) shouldLooselyMatch mapOf(
      "1" to "1",
      "2" to mapOf(
        "2.2" to "2.2",
      )
    )

[Rob Elliot]

And it needs to work if the map is nested inside a List too:

mapOf(
      "1" to "1",
      "2" to listOf(
        mapOf(
        "2.1" to "2.1",
        "2.2" to "2.2",
        )
      )
    ) shouldLooselyMatch mapOf(
      "1" to "1",
      "2" to listOf(
        mapOf(
          "2.1" to "2.1",
        )
      )
    )

[Rob Elliot]

(As you can probably guess this is at root a json matching issue - I suspect shouldEqualSpecifiedJson would do it but I've got a List/Map based representation rather than a String one...)

[sam]

there's some new json stuff in 5.3.0

[Emil Kantis]

see https://github.com/kotest/kotest/issues/2953#issuecomment-1116682739 , does it help?

[Rob Elliot]

No, it's not a schema check, it's a match that ignores properties not present in the expectation.

[Emil Kantis]

Okay, I don't know if there's such an assertion, I've never come across it at least. I would probably look into testing at another layer where the structure is serialized, or serialize it as part of the test. But I don't know the context here 🙂

[Rob Elliot]

It's basically shouldEqualSpecifiedJson, but with Maps on either side rather than strings. I could serialise the Maps to json I suppose...

Or alternatively convert them to io.kotest.assertions.json.JsonTree and use equalJson with compareJsonOptions { fieldComparison = FieldComparison.Lenient }, which would save using a string as the intermediate step.

[sam]

We have a should match json ignoring fields I thought ?

[Rob Elliot]

Yes, as I say the existing shouldEqualSpecifiedJson matcher is exactly the concept I want; I just haven't got json strings, I've got Maps.

[sam]

Ahh now I get you

[sam]

@Emil Kantis just needs to work harder 😉