test(PlaceMap): ActionHandler 테스트 작성

`PlaceMapViewModel`의 비대해진 로직을 분리하기 위해 ActionHandler 패턴을 도입하고, 상태 관리 방식을 `StateFlow`로 전면 개편했습니다.

- **`PlaceMapViewModel.kt` 리팩토링:**
    - `PlaceMapHandlerGraph.Factory`를 주입받아 로직을 `SelectActionHandler`, `FilterActionHandler`, `MapEventActionHandler`로 위임하도록 구조를 변경했습니다.
    - 기존 `LiveData` 기반의 상태 관리를 `StateFlow`(`uiState`)와 `Channel`(`mapControlUiEvent`, `placeMapUiEvent`)로 전환했습니다.

- **ActionHandler 테스트 코드 추가:**
    - `SelectActionHandlerTest`: 플레이스 선택/해제, 상세 정보 조회, 타임태그 클릭 등의 로직 테스트를 작성했습니다.
    - `FilterActionHandlerTest`: 카테고리 및 타임태그 기반의 장소 필터링 로직 테스트를 작성했습니다.
    - `MapEventActionHandlerTest`: 지도 초기화, 초기 위치 복귀, 드래그 이벤트 처리 로직 테스트를 작성했습니다.

- **테스트 및 유틸리티 정비:**
    - `PlaceMapViewModelTest`: 핸들러 위임 동작 및 `StateFlow` 상태 변화를 검증하도록 테스트를 수정했습니다.
    - `PlaceListViewModelTest`를 삭제하고, 관련 픽스처 및 테스트 파일들을 `placeList`에서 `placeMap` 패키지로 이동했습니다.
    - Flow 기반 테스트를 지원하기 위한 `observeEvent` 확장 함수(`FlowExtensions.kt`)를 추가했습니다.

Author: oungsi2000

app/src/main/java/com/daedan/festabook/presentation/placeMap/PlaceMapViewModel.kt

@@ -2,7 +2,6 @@ package com.daedan.festabook.presentation.placeMap
 
 import androidx.lifecycle.ViewModel
 import androidx.lifecycle.viewModelScope
-import com.daedan.festabook.di.FestaBookAppGraph
 import com.daedan.festabook.di.placeMapHandler.PlaceMapHandlerGraph
 import com.daedan.festabook.di.viewmodel.ViewModelKey
 import com.daedan.festabook.domain.repository.PlaceListRepository
@@ -22,8 +21,8 @@ import com.daedan.festabook.presentation.placeMap.model.toUiModel
 import dev.zacsweers.metro.AppScope
 import dev.zacsweers.metro.ContributesIntoMap
 import dev.zacsweers.metro.Inject
-import dev.zacsweers.metro.asContribution
 import kotlinx.coroutines.FlowPreview
+import kotlinx.coroutines.channels.BufferOverflow
 import kotlinx.coroutines.channels.Channel
 import kotlinx.coroutines.flow.Flow
 import kotlinx.coroutines.flow.MutableStateFlow
@@ -42,23 +41,28 @@ import kotlinx.coroutines.launch
 @Inject
 class PlaceMapViewModel(
     private val placeListRepository: PlaceListRepository,
-    appGraph: FestaBookAppGraph,
+    handlerGraphFactory: PlaceMapHandlerGraph.Factory,
 ) : ViewModel() {
     private val cachedPlaces = MutableStateFlow(listOf<PlaceUiModel>())
     private val cachedPlaceByTimeTag = MutableStateFlow<List<PlaceUiModel>>(emptyList())
 
     private val _uiState = MutableStateFlow(PlaceMapUiState())
     val uiState: StateFlow<PlaceMapUiState> = _uiState.asStateFlow()
 
-    private val _placeMapUiEvent = Channel<PlaceMapEvent>()
+    private val _placeMapUiEvent =
+        Channel<PlaceMapEvent>(
+            onBufferOverflow = BufferOverflow.DROP_OLDEST,
+        )
     val placeMapUiEvent: Flow<PlaceMapEvent> = _placeMapUiEvent.receiveAsFlow()
 
-    private val _mapControlUiEvent = Channel<MapControlEvent>()
+    private val _mapControlUiEvent =
+        Channel<MapControlEvent>(
+            onBufferOverflow = BufferOverflow.DROP_OLDEST,
+        )
     val mapControlUiEvent: Flow<MapControlEvent> = _mapControlUiEvent.receiveAsFlow()
 
     private val handlerGraph =
-        appGraph
-            .asContribution<PlaceMapHandlerGraph.Factory>()
+        handlerGraphFactory
             .create(
                 mapControlUiEvent = _mapControlUiEvent,
                 placeMapUiEvent = _placeMapUiEvent,

app/src/test/java/com/daedan/festabook/FlowExtensions.kt

@@ -0,0 +1,19 @@
+package com.daedan.festabook
+
+import kotlinx.coroutines.Deferred
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.async
+import kotlinx.coroutines.flow.Flow
+import kotlinx.coroutines.flow.first
+import kotlinx.coroutines.test.TestScope
+import kotlinx.coroutines.test.advanceUntilIdle
+
+@OptIn(ExperimentalCoroutinesApi::class)
+fun <T> TestScope.observeEvent(flow: Flow<T>): Deferred<T> {
+    val event =
+        backgroundScope.async {
+            flow.first()
+        }
+    advanceUntilIdle()
+    return event
+}

app/src/test/java/com/daedan/festabook/placeDetail/PlaceDetailTestFixture.kt

@@ -6,7 +6,7 @@ import com.daedan.festabook.domain.model.PlaceDetail
 import com.daedan.festabook.domain.model.PlaceDetailImage
 import com.daedan.festabook.domain.model.TimeTag
 import com.daedan.festabook.news.FAKE_NOTICES
-import com.daedan.festabook.placeList.FAKE_PLACES
+import com.daedan.festabook.placeMap.FAKE_PLACES
 import java.time.LocalTime
 
 val FAKE_PLACE_DETAIL =

app/src/test/java/com/daedan/festabook/placeDetail/PlaceDetailViewModelTest.kt

@@ -4,7 +4,7 @@ import androidx.arch.core.executor.testing.InstantTaskExecutorRule
 import com.daedan.festabook.domain.repository.PlaceDetailRepository
 import com.daedan.festabook.getOrAwaitValue
 import com.daedan.festabook.news.FAKE_NOTICES
-import com.daedan.festabook.placeList.FAKE_PLACES
+import com.daedan.festabook.placeMap.FAKE_PLACES
 import com.daedan.festabook.presentation.news.notice.model.toUiModel
 import com.daedan.festabook.presentation.placeDetail.PlaceDetailViewModel
 import com.daedan.festabook.presentation.placeDetail.model.PlaceDetailUiState