feat(chat): 채팅방 필터 모델을 추가한다

app/src/main/java/kr/co/vividnext/sodalive/v2/main/chat/model/ChatRoomFilter.kt

@@ -0,0 +1,15 @@
+package kr.co.vividnext.sodalive.v2.main.chat.model
+
+enum class ChatRoomFilter(val apiValue: String) {
+    ALL("ALL"),
+    AI("AI"),
+    DM("DM");
+
+    companion object {
+        fun fromTabIndex(index: Int): ChatRoomFilter = when (index) {
+            1 -> AI
+            2 -> DM
+            else -> ALL
+        }
+    }
+}

app/src/test/java/kr/co/vividnext/sodalive/v2/main/chat/ChatRoomFilterTest.kt

@@ -0,0 +1,28 @@
+package kr.co.vividnext.sodalive.v2.main.chat
+
+import kr.co.vividnext.sodalive.v2.main.chat.model.ChatRoomFilter
+import org.junit.Assert.assertEquals
+import org.junit.Test
+
+class ChatRoomFilterTest {
+
+    @Test
+    fun `탭 index는 채팅방 filter로 매핑된다`() {
+        assertEquals(ChatRoomFilter.ALL, ChatRoomFilter.fromTabIndex(0))
+        assertEquals(ChatRoomFilter.AI, ChatRoomFilter.fromTabIndex(1))
+        assertEquals(ChatRoomFilter.DM, ChatRoomFilter.fromTabIndex(2))
+    }
+
+    @Test
+    fun `유효하지 않은 탭 index는 전체 filter로 매핑된다`() {
+        assertEquals(ChatRoomFilter.ALL, ChatRoomFilter.fromTabIndex(-1))
+        assertEquals(ChatRoomFilter.ALL, ChatRoomFilter.fromTabIndex(3))
+    }
+
+    @Test
+    fun `filter api value는 요청 계약과 일치한다`() {
+        assertEquals("ALL", ChatRoomFilter.ALL.apiValue)
+        assertEquals("AI", ChatRoomFilter.AI.apiValue)
+        assertEquals("DM", ChatRoomFilter.DM.apiValue)
+    }
+}