feat(creator): 커뮤니티 탭 상태 관리를 추가한다

app/src/main/java/kr/co/vividnext/sodalive/di/AppDI.kt

@@ -178,6 +178,7 @@ import kr.co.vividnext.sodalive.user.login.LoginViewModel
 import kr.co.vividnext.sodalive.user.signup.SignUpViewModel
 import kr.co.vividnext.sodalive.v2.creator.channel.CreatorChannelHomeViewModel
 import kr.co.vividnext.sodalive.v2.creator.channel.audio.CreatorChannelAudioViewModel
+import kr.co.vividnext.sodalive.v2.creator.channel.community.CreatorChannelCommunityViewModel
 import kr.co.vividnext.sodalive.v2.creator.channel.data.CreatorChannelApi
 import kr.co.vividnext.sodalive.v2.creator.channel.data.CreatorChannelRepository
 import kr.co.vividnext.sodalive.v2.creator.channel.live.CreatorChannelLiveViewModel
@@ -414,6 +415,7 @@ class AppDI(private val context: Context, isDebugMode: Boolean) {
         viewModel { CreatorChannelLiveViewModel(get()) }
         viewModel { CreatorChannelAudioViewModel(get()) }
         viewModel { CreatorChannelSeriesViewModel(get()) }
+        viewModel { CreatorChannelCommunityViewModel(get()) }
         viewModel { PushNotificationListViewModel(get()) }
         viewModel { CharacterTabViewModel(get()) }
         viewModel { CharacterDetailViewModel(get()) }

app/src/main/java/kr/co/vividnext/sodalive/v2/creator/channel/community/CreatorChannelCommunityViewModel.kt

@@ -0,0 +1,177 @@
+package kr.co.vividnext.sodalive.v2.creator.channel.community
+
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.MutableLiveData
+import com.orhanobut.logger.Logger
+import io.reactivex.rxjava3.android.schedulers.AndroidSchedulers
+import io.reactivex.rxjava3.schedulers.Schedulers
+import kr.co.vividnext.sodalive.base.BaseViewModel
+import kr.co.vividnext.sodalive.common.ApiResponse
+import kr.co.vividnext.sodalive.common.SharedPreferenceManager
+import kr.co.vividnext.sodalive.v2.creator.channel.community.data.CreatorChannelCommunityPostResponse
+import kr.co.vividnext.sodalive.v2.creator.channel.community.data.CreatorChannelCommunityTabResponse
+import kr.co.vividnext.sodalive.v2.creator.channel.data.CreatorChannelRepository
+
+class CreatorChannelCommunityViewModel(
+    private val repository: CreatorChannelRepository
+) : BaseViewModel() {
+
+    private val _communityStateLiveData = MutableLiveData<CreatorChannelCommunityUiState>()
+    val communityStateLiveData: LiveData<CreatorChannelCommunityUiState>
+        get() = _communityStateLiveData
+
+    private var creatorId: Long = 0L
+    private var isOwner: Boolean = false
+    private var viewMode: CreatorChannelCommunityViewMode = CreatorChannelCommunityViewMode.List
+    private var requestGeneration: Int = 0
+
+    fun loadCommunity(creatorId: Long, isOwner: Boolean) {
+        if (creatorId <= 0) return
+        val shouldSkipReload = this.creatorId == creatorId && this.isOwner == isOwner && _communityStateLiveData.value != null
+        if (shouldSkipReload) return
+
+        this.creatorId = creatorId
+        this.isOwner = isOwner
+        loadFirstPage()
+    }
+
+    fun toggleViewMode() {
+        val content = _communityStateLiveData.value as? CreatorChannelCommunityUiState.Content ?: return
+        viewMode = when (content.viewMode) {
+            CreatorChannelCommunityViewMode.List -> CreatorChannelCommunityViewMode.Grid
+            CreatorChannelCommunityViewMode.Grid -> CreatorChannelCommunityViewMode.List
+        }
+        _communityStateLiveData.value = content.copy(viewMode = viewMode)
+    }
+
+    fun retryCommunity() {
+        if (creatorId <= 0) return
+
+        loadFirstPage()
+    }
+
+    fun loadMore() {
+        val content = _communityStateLiveData.value as? CreatorChannelCommunityUiState.Content ?: return
+        if (!content.hasNext || content.isLoadingMore || creatorId <= 0) return
+
+        val generation = requestGeneration
+        _communityStateLiveData.value = content.copy(isLoadingMore = true, paginationErrorMessage = null)
+        requestCommunity(page = content.page + 1, generation = generation) { response ->
+            val data = response.data
+            val current = _communityStateLiveData.value as? CreatorChannelCommunityUiState.Content ?: content
+            if (response.success && data != null) {
+                _communityStateLiveData.value = current.copy(
+                    communityPosts = current.communityPosts + data.communityPosts,
+                    page = data.page,
+                    size = data.size,
+                    hasNext = data.hasNext,
+                    isLoadingMore = false
+                )
+            } else {
+                _communityStateLiveData.value = current.copy(
+                    isLoadingMore = false,
+                    paginationErrorMessage = response.message
+                )
+            }
+        }
+    }
+
+    fun consumePaginationErrorMessage() {
+        val content = _communityStateLiveData.value as? CreatorChannelCommunityUiState.Content ?: return
+        if (content.paginationErrorMessage == null) return
+
+        _communityStateLiveData.value = content.copy(paginationErrorMessage = null)
+    }
+
+    private fun loadFirstPage() {
+        val generation = ++requestGeneration
+        _communityStateLiveData.value = CreatorChannelCommunityUiState.Loading
+        requestCommunity(page = FIRST_PAGE, generation = generation) { response ->
+            val data = response.data
+            if (response.success && data != null) {
+                val communityPosts = data.communityPosts
+                _communityStateLiveData.value = if (communityPosts.isEmpty() || data.communityPostCount == 0) {
+                    CreatorChannelCommunityUiState.Empty
+                } else {
+                    data.toContentState(communityPosts = communityPosts)
+                }
+            } else {
+                _communityStateLiveData.value = CreatorChannelCommunityUiState.Error(response.message)
+            }
+        }
+    }
+
+    private fun requestCommunity(
+        page: Int,
+        generation: Int,
+        onSuccess: (ApiResponse<CreatorChannelCommunityTabResponse>) -> Unit
+    ) {
+        compositeDisposable.add(
+            repository.getCommunity(
+                creatorId = creatorId,
+                page = page,
+                size = DEFAULT_PAGE_SIZE,
+                token = authToken()
+            )
+                .subscribeOn(Schedulers.io())
+                .observeOn(AndroidSchedulers.mainThread())
+                .subscribe(
+                    {
+                        if (generation == requestGeneration) {
+                            onSuccess(it)
+                        }
+                    },
+                    {
+                        if (generation != requestGeneration) return@subscribe
+
+                        it.message?.let { message -> Logger.e(message) }
+                        val current = _communityStateLiveData.value as? CreatorChannelCommunityUiState.Content
+                        _communityStateLiveData.value = if (current != null && page > FIRST_PAGE) {
+                            current.copy(isLoadingMore = false, paginationErrorMessage = it.message)
+                        } else {
+                            CreatorChannelCommunityUiState.Error(it.message)
+                        }
+                    }
+                )
+        )
+    }
+
+    private fun CreatorChannelCommunityTabResponse.toContentState(
+        communityPosts: List<CreatorChannelCommunityPostResponse>
+    ) = CreatorChannelCommunityUiState.Content(
+        communityPostCount = communityPostCount,
+        communityPosts = communityPosts,
+        viewMode = viewMode,
+        page = page,
+        size = size,
+        hasNext = hasNext
+    )
+
+    private fun authToken(): String = "Bearer ${SharedPreferenceManager.token}"
+
+    companion object {
+        val DEFAULT_PAGE_SIZE = 20
+        private const val FIRST_PAGE = 0
+    }
+}
+
+enum class CreatorChannelCommunityViewMode {
+    List,
+    Grid
+}
+
+sealed interface CreatorChannelCommunityUiState {
+    data object Loading : CreatorChannelCommunityUiState
+    data object Empty : CreatorChannelCommunityUiState
+    data class Error(val message: String?) : CreatorChannelCommunityUiState
+    data class Content(
+        val communityPostCount: Int,
+        val communityPosts: List<CreatorChannelCommunityPostResponse>,
+        val viewMode: CreatorChannelCommunityViewMode,
+        val page: Int,
+        val size: Int,
+        val hasNext: Boolean,
+        val isLoadingMore: Boolean = false,
+        val paginationErrorMessage: String? = null
+    ) : CreatorChannelCommunityUiState
+}

app/src/test/java/kr/co/vividnext/sodalive/v2/creator/channel/community/CreatorChannelCommunityPaginationTest.kt

@@ -0,0 +1,219 @@
+package kr.co.vividnext.sodalive.v2.creator.channel.community
+
+import android.app.Application
+import android.content.Context
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.Observer
+import androidx.test.core.app.ApplicationProvider
+import io.reactivex.rxjava3.android.plugins.RxAndroidPlugins
+import io.reactivex.rxjava3.core.Scheduler
+import io.reactivex.rxjava3.core.Single
+import io.reactivex.rxjava3.plugins.RxJavaPlugins
+import io.reactivex.rxjava3.schedulers.Schedulers
+import io.reactivex.rxjava3.subjects.SingleSubject
+import kr.co.vividnext.sodalive.common.ApiResponse
+import kr.co.vividnext.sodalive.common.SharedPreferenceManager
+import kr.co.vividnext.sodalive.v2.creator.channel.community.data.CreatorChannelCommunityPostResponse
+import kr.co.vividnext.sodalive.v2.creator.channel.community.data.CreatorChannelCommunityTabResponse
+import kr.co.vividnext.sodalive.v2.creator.channel.data.CreatorChannelRepository
+import org.junit.After
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertFalse
+import org.junit.Assert.assertTrue
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.mockito.kotlin.times
+import org.mockito.kotlin.verify
+import org.mockito.kotlin.whenever
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
+
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [28], application = Application::class)
+class CreatorChannelCommunityPaginationTest {
+
+    private val context: Context = ApplicationProvider.getApplicationContext()
+    private lateinit var repository: CreatorChannelRepository
+    private lateinit var viewModel: CreatorChannelCommunityViewModel
+
+    @Before
+    fun setUp() {
+        setImmediateRxSchedulers()
+        SharedPreferenceManager.resetForTest()
+        SharedPreferenceManager.init(context)
+        SharedPreferenceManager.token = "test-token"
+        repository = org.mockito.kotlin.mock()
+        viewModel = CreatorChannelCommunityViewModel(repository)
+    }
+
+    @After
+    fun tearDown() {
+        RxJavaPlugins.reset()
+        RxAndroidPlugins.reset()
+        SharedPreferenceManager.resetForTest()
+    }
+
+    @Test
+    fun `hasNext가 true이면 다음 페이지는 마지막 성공 응답의 page plus 1로 요청하고 append한다`() {
+        stubGetCommunity(
+            page = 0,
+            response = Single.just(
+                ApiResponse(true, communityResponse(page = 0, ids = listOf(1L), hasNext = true), null)
+            )
+        )
+        stubGetCommunity(
+            page = 1,
+            response = Single.just(
+                ApiResponse(true, communityResponse(page = 1, ids = listOf(2L), hasNext = false), null)
+            )
+        )
+        viewModel.loadCommunity(100L, isOwner = false)
+
+        viewModel.loadMore()
+
+        val state = viewModel.communityStateLiveData.requireValue() as CreatorChannelCommunityUiState.Content
+        assertEquals(1, state.page)
+        assertEquals(listOf(1L, 2L), state.communityPosts.map { it.postId })
+        assertFalse(state.hasNext)
+        verifyGetCommunity(page = 1)
+    }
+
+    @Test
+    fun `다음 페이지 로딩 중 중복 load-more 요청은 막고 size 20을 유지한다`() {
+        val pending = SingleSubject.create<ApiResponse<CreatorChannelCommunityTabResponse>>()
+        stubGetCommunity(
+            page = 0,
+            response = Single.just(
+                ApiResponse(true, communityResponse(page = 0, ids = listOf(1L), hasNext = true), null)
+            )
+        )
+        stubGetCommunity(page = 1, response = pending)
+        viewModel.loadCommunity(100L, isOwner = false)
+
+        viewModel.loadMore()
+        viewModel.loadMore()
+
+        val loadingState = viewModel.communityStateLiveData.requireValue() as CreatorChannelCommunityUiState.Content
+        assertTrue(loadingState.isLoadingMore)
+        verifyGetCommunity(page = 1, times = 1)
+        pending.onSuccess(
+            ApiResponse(true, communityResponse(page = 1, ids = listOf(2L), hasNext = false), null)
+        )
+        val loadedState = viewModel.communityStateLiveData.requireValue() as CreatorChannelCommunityUiState.Content
+        assertEquals(CreatorChannelCommunityViewModel.DEFAULT_PAGE_SIZE, loadedState.size)
+        assertEquals(listOf(1L, 2L), loadedState.communityPosts.map { it.postId })
+    }
+
+    @Test
+    fun `다음 페이지 실패는 기존 목록을 유지하고 pagination error를 표시한다`() {
+        stubGetCommunity(
+            page = 0,
+            response = Single.just(
+                ApiResponse(true, communityResponse(page = 0, ids = listOf(1L), hasNext = true), null)
+            )
+        )
+        stubGetCommunity(
+            page = 1,
+            response = Single.just(ApiResponse(false, null, "failed"))
+        )
+        viewModel.loadCommunity(100L, isOwner = false)
+
+        viewModel.loadMore()
+
+        val state = viewModel.communityStateLiveData.requireValue() as CreatorChannelCommunityUiState.Content
+        assertEquals(listOf(1L), state.communityPosts.map { it.postId })
+        assertFalse(state.isLoadingMore)
+        assertEquals("failed", state.paginationErrorMessage)
+    }
+
+    @Test
+    fun `pagination error message는 표시 후 clear되어 다시 표시되지 않는다`() {
+        stubGetCommunity(
+            page = 0,
+            response = Single.just(
+                ApiResponse(true, communityResponse(page = 0, ids = listOf(1L), hasNext = true), null)
+            )
+        )
+        stubGetCommunity(
+            page = 1,
+            response = Single.just(ApiResponse(false, null, "failed"))
+        )
+        viewModel.loadCommunity(100L, isOwner = false)
+        viewModel.loadMore()
+
+        viewModel.consumePaginationErrorMessage()
+
+        val state = viewModel.communityStateLiveData.requireValue() as CreatorChannelCommunityUiState.Content
+        assertEquals(null, state.paginationErrorMessage)
+        assertEquals(listOf(1L), state.communityPosts.map { it.postId })
+    }
+
+    private fun stubGetCommunity(
+        page: Int,
+        response: Single<ApiResponse<CreatorChannelCommunityTabResponse>>
+    ) {
+        whenever(
+            repository.getCommunity(
+                100L,
+                page,
+                CreatorChannelCommunityViewModel.DEFAULT_PAGE_SIZE,
+                "Bearer test-token"
+            )
+        ).thenReturn(response)
+    }
+
+    private fun verifyGetCommunity(page: Int, times: Int? = null) {
+        val verification = times?.let { verify(repository, times(it)) } ?: verify(repository)
+        verification.getCommunity(
+            100L,
+            page,
+            CreatorChannelCommunityViewModel.DEFAULT_PAGE_SIZE,
+            "Bearer test-token"
+        )
+    }
+
+    private fun setImmediateRxSchedulers() {
+        val trampoline = { _: Scheduler -> Schedulers.trampoline() }
+        RxJavaPlugins.setIoSchedulerHandler(trampoline)
+        RxAndroidPlugins.setInitMainThreadSchedulerHandler { Schedulers.trampoline() }
+        RxAndroidPlugins.setMainThreadSchedulerHandler { Schedulers.trampoline() }
+    }
+
+    private fun communityResponse(
+        page: Int,
+        ids: List<Long>,
+        hasNext: Boolean
+    ) = CreatorChannelCommunityTabResponse(
+        communityPostCount = ids.size,
+        communityPosts = ids.map { communityPost(it) },
+        page = page,
+        size = CreatorChannelCommunityViewModel.DEFAULT_PAGE_SIZE,
+        hasNext = hasNext
+    )
+
+    private fun communityPost(id: Long) = CreatorChannelCommunityPostResponse(
+        postId = id,
+        creatorId = 100L,
+        creatorNickname = "creator",
+        creatorProfileUrl = "profile.png",
+        createdAtUtc = "2026-06-21T00:00:00Z",
+        content = "community $id",
+        imageUrl = null,
+        audioUrl = null,
+        price = 0,
+        existOrdered = true,
+        isCommentAvailable = true,
+        likeCount = 1,
+        commentCount = 2,
+        isPinned = false
+    )
+
+    private fun <T> LiveData<T>.requireValue(): T? {
+        var value: T? = null
+        val observer = Observer<T> { value = it }
+        observeForever(observer)
+        removeObserver(observer)
+        return value
+    }
+}

app/src/test/java/kr/co/vividnext/sodalive/v2/creator/channel/community/CreatorChannelCommunityViewModelTest.kt

@@ -0,0 +1,206 @@
+package kr.co.vividnext.sodalive.v2.creator.channel.community
+
+import android.app.Application
+import android.content.Context
+import androidx.lifecycle.LiveData
+import androidx.lifecycle.Observer
+import androidx.test.core.app.ApplicationProvider
+import io.reactivex.rxjava3.android.plugins.RxAndroidPlugins
+import io.reactivex.rxjava3.core.Scheduler
+import io.reactivex.rxjava3.core.Single
+import io.reactivex.rxjava3.plugins.RxJavaPlugins
+import io.reactivex.rxjava3.schedulers.Schedulers
+import kr.co.vividnext.sodalive.common.ApiResponse
+import kr.co.vividnext.sodalive.common.SharedPreferenceManager
+import kr.co.vividnext.sodalive.v2.creator.channel.community.data.CreatorChannelCommunityPostResponse
+import kr.co.vividnext.sodalive.v2.creator.channel.community.data.CreatorChannelCommunityTabResponse
+import kr.co.vividnext.sodalive.v2.creator.channel.data.CreatorChannelRepository
+import org.junit.After
+import org.junit.Assert.assertEquals
+import org.junit.Assert.assertTrue
+import org.junit.Before
+import org.junit.Test
+import org.junit.runner.RunWith
+import org.mockito.kotlin.any
+import org.mockito.kotlin.never
+import org.mockito.kotlin.times
+import org.mockito.kotlin.verify
+import org.mockito.kotlin.whenever
+import org.robolectric.RobolectricTestRunner
+import org.robolectric.annotation.Config
+
+@RunWith(RobolectricTestRunner::class)
+@Config(sdk = [28], application = Application::class)
+class CreatorChannelCommunityViewModelTest {
+
+    private val context: Context = ApplicationProvider.getApplicationContext()
+    private lateinit var repository: CreatorChannelRepository
+    private lateinit var viewModel: CreatorChannelCommunityViewModel
+
+    @Before
+    fun setUp() {
+        setImmediateRxSchedulers()
+        SharedPreferenceManager.resetForTest()
+        SharedPreferenceManager.init(context)
+        SharedPreferenceManager.token = "test-token"
+        repository = org.mockito.kotlin.mock()
+        viewModel = CreatorChannelCommunityViewModel(repository)
+    }
+
+    @After
+    fun tearDown() {
+        RxJavaPlugins.reset()
+        RxAndroidPlugins.reset()
+        SharedPreferenceManager.resetForTest()
+    }
+
+    @Test
+    fun `최초 로드는 page 0 size 20으로 커뮤니티 API를 호출하고 기본 리스트형 Content를 emit한다`() {
+        stubGetCommunity(response = Single.just(ApiResponse(true, communityResponse(ids = listOf(1L)), null)))
+
+        viewModel.loadCommunity(100L, isOwner = false)
+
+        val state = viewModel.communityStateLiveData.requireValue() as CreatorChannelCommunityUiState.Content
+        assertEquals(CreatorChannelCommunityViewMode.List, state.viewMode)
+        assertEquals(0, state.page)
+        assertEquals(CreatorChannelCommunityViewModel.DEFAULT_PAGE_SIZE, state.size)
+        assertEquals(listOf(1L), state.communityPosts.map { it.postId })
+        verifyGetCommunity()
+    }
+
+    @Test
+    fun `보기 방식 toggle은 리스트형 그리드형 리스트형 순서이며 API를 재호출하지 않는다`() {
+        stubGetCommunity(response = Single.just(ApiResponse(true, communityResponse(ids = listOf(1L)), null)))
+        viewModel.loadCommunity(100L, isOwner = false)
+
+        viewModel.toggleViewMode()
+        val gridState = viewModel.communityStateLiveData.requireValue() as CreatorChannelCommunityUiState.Content
+        viewModel.toggleViewMode()
+        val listState = viewModel.communityStateLiveData.requireValue() as CreatorChannelCommunityUiState.Content
+
+        assertEquals(CreatorChannelCommunityViewMode.Grid, gridState.viewMode)
+        assertEquals(CreatorChannelCommunityViewMode.List, listState.viewMode)
+        assertEquals(listOf(1L), listState.communityPosts.map { it.postId })
+        verifyGetCommunity(times = 1)
+    }
+
+    @Test
+    fun `communityPostCount가 0이면 표시 가능한 item이 있어도 Empty를 emit한다`() {
+        stubGetCommunity(
+            response = Single.just(
+                ApiResponse(true, communityResponse(communityPostCount = 0, ids = listOf(1L)), null)
+            )
+        )
+
+        viewModel.loadCommunity(100L, isOwner = false)
+
+        assertTrue(viewModel.communityStateLiveData.requireValue() is CreatorChannelCommunityUiState.Empty)
+    }
+
+    @Test
+    fun `표시 가능한 communityPosts가 없으면 Empty를 emit한다`() {
+        stubGetCommunity(response = Single.just(ApiResponse(true, communityResponse(ids = emptyList()), null)))
+
+        viewModel.loadCommunity(100L, isOwner = false)
+
+        assertTrue(viewModel.communityStateLiveData.requireValue() is CreatorChannelCommunityUiState.Empty)
+    }
+
+    @Test
+    fun `retryCommunity는 첫 페이지를 다시 조회한다`() {
+        whenever(
+            repository.getCommunity(
+                100L,
+                0,
+                CreatorChannelCommunityViewModel.DEFAULT_PAGE_SIZE,
+                "Bearer test-token"
+            )
+        ).thenReturn(
+            Single.just(ApiResponse(false, null, "failed")),
+            Single.just(ApiResponse(true, communityResponse(ids = listOf(2L)), null))
+        )
+        viewModel.loadCommunity(100L, isOwner = false)
+
+        viewModel.retryCommunity()
+
+        val state = viewModel.communityStateLiveData.requireValue() as CreatorChannelCommunityUiState.Content
+        assertEquals(listOf(2L), state.communityPosts.map { it.postId })
+        verifyGetCommunity(times = 2)
+    }
+
+    @Test
+    fun `creatorId가 0 이하이면 커뮤니티 API를 호출하지 않는다`() {
+        viewModel.loadCommunity(0L, isOwner = false)
+
+        verify(repository, never()).getCommunity(any(), any(), any(), any())
+    }
+
+    private fun stubGetCommunity(
+        page: Int = 0,
+        response: Single<ApiResponse<CreatorChannelCommunityTabResponse>>
+    ) {
+        whenever(
+            repository.getCommunity(
+                100L,
+                page,
+                CreatorChannelCommunityViewModel.DEFAULT_PAGE_SIZE,
+                "Bearer test-token"
+            )
+        ).thenReturn(response)
+    }
+
+    private fun verifyGetCommunity(page: Int = 0, times: Int? = null) {
+        val verification = times?.let { verify(repository, times(it)) } ?: verify(repository)
+        verification.getCommunity(
+            100L,
+            page,
+            CreatorChannelCommunityViewModel.DEFAULT_PAGE_SIZE,
+            "Bearer test-token"
+        )
+    }
+
+    private fun setImmediateRxSchedulers() {
+        val trampoline = { _: Scheduler -> Schedulers.trampoline() }
+        RxJavaPlugins.setIoSchedulerHandler(trampoline)
+        RxAndroidPlugins.setInitMainThreadSchedulerHandler { Schedulers.trampoline() }
+        RxAndroidPlugins.setMainThreadSchedulerHandler { Schedulers.trampoline() }
+    }
+
+    private fun communityResponse(
+        page: Int = 0,
+        communityPostCount: Int? = null,
+        ids: List<Long>,
+        hasNext: Boolean = false
+    ) = CreatorChannelCommunityTabResponse(
+        communityPostCount = communityPostCount ?: ids.size,
+        communityPosts = ids.map { communityPost(it) },
+        page = page,
+        size = CreatorChannelCommunityViewModel.DEFAULT_PAGE_SIZE,
+        hasNext = hasNext
+    )
+
+    private fun communityPost(id: Long) = CreatorChannelCommunityPostResponse(
+        postId = id,
+        creatorId = 100L,
+        creatorNickname = "creator",
+        creatorProfileUrl = "profile.png",
+        createdAtUtc = "2026-06-21T00:00:00Z",
+        content = "community $id",
+        imageUrl = null,
+        audioUrl = null,
+        price = 0,
+        existOrdered = true,
+        isCommentAvailable = true,
+        likeCount = 1,
+        commentCount = 2,
+        isPinned = false
+    )
+
+    private fun <T> LiveData<T>.requireValue(): T? {
+        var value: T? = null
+        val observer = Observer<T> { value = it }
+        observeForever(observer)
+        removeObserver(observer)
+        return value
+    }
+}