Pack repeated groups into answers

[jingtang10]

IMPORTANT: All PRs must be linked to an issue (except for extremely trivial and straightforward changes).

Fixes #1900

Description
In our in-memory representation of QuestionnaireResponse, we nest repeated groups under the parent questionnaire response item as individual answers. However user-provided qustionnaire response JSON has repeated groups flattened as repeated items. To make the QuestionnaireViewModel accept such JSON, we need to pack the repeated groups under the same questionnaire response item. Additionally, when questionnaire response is returned to the application, repeated groups need to be unpacked again.

We created two extension functions QuestionnaireResponse.packRepeatedGroups and QuestionnaireResponse.unpackRepeatedGroups for this.

Create packRepeatedGroup and unpackRepeatedGroup functions

Alternative(s) considered
NA

Type
Bug fix

Screenshots (if applicable)

Checklist

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• I have discussed my proposed solution with code owners in the linked issue(s) and we have agreed upon the general approach.
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[jingtang10]

@kevinmost @omarismail94 @nsabale7 can you please review? thanks!

[kevinmost]

Overall looks really good to me

[jingtang10]

updated description.

[omarismail94]

Do we need to add an Espresso test to verify that a user provided QR that gets answered is saved? i.e. mimicing the issue that Nitin had

[jingtang10]

Do we need to add an Espresso test to verify that a user provided QR that gets answered is saved? i.e. mimicing the issue that Nitin had

i think the QVM test covers this sufficiently.

i believe espresso tests (and any other integration tests) should cover broad cases. corner cases should be covered by unit tests.

EDIT: spelling

[jingtang10]

thanks both @kevinmost @omarismail94.

omar - replied to your comments. ptal.

[omarismail94]

Thanks Jing, great change!!