[TC-IDM-4.3]--Chip tool needs to provide a way to set MinIntervalFloor value > MinIntervalFloor value For subscription request.

[Rajashreekalmane]

Problem

As per Test-Plan, step 21 says TH sends a subscription request action for attribute and set the MinIntervalFloor value to be greater than MaxIntervalCeiling, and expecting response as DUT sends an error message and the subscription is not established.
Chip tool needs to provide a way to set MinIntervalFloor value > MaxIntervalCeiling value when TH sends a subscription request action for attribute to DUT.

Test-Plan screenshot:-

Spec Reference:-
https://github.com/CHIP-Specifications/connectedhomeip-spec/blob/master/src/data_model/Interaction-Model.adoc#subscribe-response-action

[bzbarsky-apple]

@Rajashreekalmane @cjandhyala I don't understand this issue. The test plan says to set MinIntervalFloor to the same value as MaxIntervalCeiling (which chip-tool supports), but the text of the issue talks about setting MinIntervalFloor > MinIntervalFloor, which is obviously not possible.

[bzbarsky-apple]

I am guessing this issue is actually about step 21, not step 20, and that the request is that we allow MinIntervalFloor > MaxIntervalCeiling?

If so, that's not allowed in the SDK right now, so adding it to chip-tool is not exactly trivial.

[andy31415]

Are we supposed to cert-block on negative test cases? I imagine many of these may be non-trivial to implement.

@cjandhyala what is the policy here? I would be inclined to not block on "allow invalid values to be accepted by tooling" or at least separate these cases a bit, since we will want some flags/builds/error injection capability for "I am providing invalid values but I know what I am doing and really need it"

[woody-apple]

Cert Blocker Review: Looks like this is in active discussion with @vivien-apple and @cjandhyala

[Rajashreekalmane]

@bzbarsky-apple Yes the issue is on step 21 , I have updated the issue Now.

[mrjerryjohns]

I don't think is validatable without modifications to the IM implementation in the SDK to permit this 'test modality' and skips initial validation of these parameters.

I'd recommend we skip this test.

[bzbarsky-apple]

@mrjerryjohns See #18855