[Summit prep] Add a search feature

[mmiklos2]

No description provided.

[Copilot]

Pull Request Overview

This PR adds a search feature to the country list by extending the ViewModel state, filtering logic, tests, and UI.

• Introduces searchQuery and updateSearchQuery() in CountryListViewModel
• Adds a computed filteredContinents property and corresponding unit test
• Updates the Compose UI (CountryListPage) to show a TextField and uses filtered data
• Fixes package typos in component imports and wires the adapter to the new search APIs

Reviewed Changes

Copilot reviewed 6 out of 6 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
viewmodels/src/test/kotlin/com/example/viewmodels/CountryListViewModelTests.kt	Adds FilteredContinents nested tests to verify search behavior
viewmodels/src/main/java/com/example/viewmodels/CountryListViewModel.kt	Adds searchQuery to UiState, filteredContinents getter, and updateSearchQuery method
feature/src/main/java/com/example/feature/countrylist/components/CountrySelectingList.kt	Corrects package name from componenets to components
feature/src/main/java/com/example/feature/countrylist/components/CountrySelectingButton.kt	Corrects package name from componenets to components
feature/src/main/java/com/example/feature/countrylist/CountryListPage.kt	Imports TextField, adds search bar UI, passes filteredContinents
feature/src/main/java/com/example/feature/countrylist/CountryListAdapter.kt	Propagates onSearchQueryChange and binds filteredContinents

Comments suppressed due to low confidence (1)

viewmodels/src/test/kotlin/com/example/viewmodels/CountryListViewModelTests.kt:113

• [nitpick] This test verifies filtering by region code but not by countryName; consider adding a test where the search query matches the country name to ensure full coverage of the filter logic.

            viewModel.updateSearchQuery("fr")

[Copilot]

Using !! on _state.value can throw a NullPointerException if value is ever null; consider using a safe call (value?.copy(...)) or ensuring the subject always has a non-null value before updating.

Suggested change

	_state.onNext(_state.value!!.copy(searchQuery = query))
	_state.value?.let { currentState ->
	_state.onNext(currentState.copy(searchQuery = query))
	}

[Copilot]

[nitpick] Defining searchQuery as a var in a data-style state class breaks immutability; consider changing it to val and enforcing updates only via copy() to keep UiState pure.

Suggested change

	var searchQuery: String = "",
	val searchQuery: String = "",

[Copilot]

[nitpick] The test uses reflection to access a private field _state; consider exposing a test-only setter or using a public API to inject state, reducing coupling to the implementation details.

[Copilot]

The label string is hardcoded; for localization support, consider moving it into strings.xml and referring to it via a resource ID.