WCProductCategoryModel to Room

[wzieba]

Closes: AINFRA-125

Description

This PR migrates WCProductCategoryModel to Room.

Testing information

Smoke test any feature that uses WCProductCategoryModel.

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• I have considered if this change warrants release notes and have added them to RELEASE-NOTES.txt if necessary. Use the "[Internal]" label for non-user-facing changes.

Reviewer (or Author, in the case of optional code reviews):

Please make sure these conditions are met before approving the PR, or request changes if the PR needs improvement:

• The PR is small and has a clear, single focus, or a valid explanation is provided in the description. If needed, please request to split it into smaller PRs.
• Ensure Adequate Unit Test Coverage: The changes are reasonably covered by unit tests or an explanation is provided in the PR description.
• Manual Testing: The author listed all the tests they ran, including smoke tests when needed (e.g., for refactorings). The reviewer confirmed that the PR works as expected on big (tablet) and small (phone) in case of UI changes, and no regressions are added.

[dangermattic]

	1 Warning
⚠️	This PR is larger than 300 lines of changes. Please consider splitting it into smaller PRs for easier and faster reviews.

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[wpmobilebot]

📲 You can test the changes from this Pull Request in WooCommerce-Wear Android by scanning the QR code below to install the corresponding build.

	App Name	WooCommerce-Wear Android
	Platform	⌚️ Wear OS
	Flavor	Jalapeno
	Build Type	Debug
	Commit	d512b96
	Direct Download	woocommerce-wear-prototype-build-pr13996-d512b96.apk

[wpmobilebot]

📲 You can test the changes from this Pull Request in WooCommerce Android by scanning the QR code below to install the corresponding build.

	App Name	WooCommerce Android
	Platform	📱 Mobile
	Flavor	Jalapeno
	Build Type	Debug
	Commit	d512b96
	Direct Download	woocommerce-prototype-build-pr13996-d512b96.apk

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 12.00000% with 44 lines in your changes missing coverage. Please review.

Project coverage is 38.35%. Comparing base (3e6c29c) to head (d512b96).

Files with missing lines	Patch %	Lines
...rg/wordpress/android/fluxc/store/WCProductStore.kt	0.00%	23 Missing ⚠️
...products/categories/ProductCategoriesRepository.kt	0.00%	9 Missing ⚠️
...network/rest/wpcom/wc/product/ProductRestClient.kt	0.00%	6 Missing ⚠️
...est/wpcom/wc/product/ProductCategoryApiResponse.kt	0.00%	5 Missing ⚠️
...roid/fluxc/persistence/dao/ProductCategoriesDao.kt	0.00%	1 Missing ⚠️

Additional details and impacted files

@@                              Coverage Diff                              @@
##             migrate_product_variation_to_room_tests   #13996      +/-   ##
=============================================================================
+ Coverage                                      38.31%   38.35%   +0.04%     
- Complexity                                      9515     9516       +1     
=============================================================================
  Files                                           2119     2120       +1     
  Lines                                         116382   116265     -117     
  Branches                                       14934    14931       -3     
=============================================================================
+ Hits                                           44593    44595       +2     
+ Misses                                         67708    67590     -118     
+ Partials                                        4081     4080       -1     

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[wzieba]

There's something off with WCLeaderboardsStoreTest > fetch top performer products legacy should return mapped top performer entities correctly test. It was failing on CI, but locally, it passed every time for me. After 2 re-runs on CI, it started to pass on CI as well.

[Copilot]

Pull Request Overview

This PR migrates the WCProductCategoryModel from legacy SQL-based operations to Room, replacing functions in the store, DAO, network client, and test utilities. Key changes include:

• Refactoring database operations to use the ProductCategoriesDao with Room (upsert, delete, observe).
• Updating API conversion methods to use immutable data classes via copy().
• Modifying tests and UI components to accommodate the suspend functions and Room-based model.

Reviewed Changes

Copilot reviewed 19 out of 19 changed files in this pull request and generated no comments.

Show a summary per file

File	Description
ProductTestUtils.kt	Removed legacy helper generators and updated getProductCategories() to use constructor-based model creation.
WCProductLeaderboardsMapperTest.kt & WCLeaderboardsStoreTest.kt	Added productCategoriesDao usage to tests.
WCProductStore.kt	Migrated category-related operations from ProductSqlUtils to Room DAO calls.
ProductCategoriesDao.kt	New DAO definition for WCProductCategoryModel with Room annotations.
WCAndroidDatabase.kt	Added WCProductCategoryModel to the Room database with updated version and migration.
ProductSqlUtils.kt	Removed legacy SQL functions for product categories.
ProductRestClient.kt & ProductCategoryApiResponse.kt	Updated category model conversion to use copy() for immutability.
WCProductCategoryModel.kt	Converted from mutable model with WellSQL annotations to an immutable data class with Room Entity annotation.
WCDatabaseModule.kt	Provided injection for the new ProductCategoriesDao.
GetCategoriesByIdsTest.kt, ProductCategoriesRepository.kt, AddProductCategoryViewModel.kt, AddProductCategoryFragment.kt	Updated tests and repository functions to work with the Room migration and suspend functions.

Comments suppressed due to low confidence (2)

WooCommerce/src/test/kotlin/com/woocommerce/android/ui/products/categories/AddProductCategoryFragment.kt:115

• Consider using viewLifecycleOwner.lifecycleScope.launch { ... } instead of runBlocking to asynchronously fetch and set the parent category name, avoiding potential UI thread blocking.

runBlocking { viewModel.getSelectedParentCategoryName()?.let { setText(it) } }

WooCommerce/src/test/kotlin/com/woocommerce/android/ui/products/categories/AddProductCategoryFragment.kt:167

• Replace runBlocking with an asynchronous call using lifecycleScope to prevent UI thread blocking during click handling.

val parentCategoryName = runBlocking { viewModel.getSelectedParentCategoryName() }