fix(widget): 배너 가상 목록 갱신을 안정화한다

app/src/test/java/kr/co/vividnext/sodalive/v2/widget/banner/BannerViewTest.kt

@@ -67,6 +67,74 @@ class BannerViewTest {
         assertEquals(items[1], clickedItem)
     }
 
+    @Test
+    fun `adapter는 carousel 설정 시 max range notify를 호출하지 않는다`() {
+        val adapter = BannerAdapter()
+        var insertedItemCount = 0
+        var changedItemCount = 0
+        var dataSetChangedCount = 0
+        adapter.registerAdapterDataObserver(
+            object : RecyclerView.AdapterDataObserver() {
+                override fun onItemRangeInserted(positionStart: Int, itemCount: Int) {
+                    insertedItemCount = itemCount
+                }
+
+                override fun onItemRangeChanged(positionStart: Int, itemCount: Int) {
+                    changedItemCount = itemCount
+                }
+
+                override fun onChanged() {
+                    dataSetChangedCount += 1
+                }
+            }
+        )
+
+        adapter.submitItems(listOf(sampleItem("1"), sampleItem("2")))
+        adapter.setItemSizePx(100)
+
+        assertEquals(0, insertedItemCount)
+        assertEquals(0, changedItemCount)
+        assertEquals(2, dataSetChangedCount)
+    }
+
+    @Test
+    fun `adapter는 단일 배너 설정 시 specific notify를 호출한다`() {
+        val adapter = BannerAdapter()
+        var insertedItemCount = 0
+        var changedItemCount = 0
+        var removedItemCount = 0
+        var dataSetChangedCount = 0
+        adapter.registerAdapterDataObserver(
+            object : RecyclerView.AdapterDataObserver() {
+                override fun onItemRangeInserted(positionStart: Int, itemCount: Int) {
+                    insertedItemCount += itemCount
+                }
+
+                override fun onItemRangeChanged(positionStart: Int, itemCount: Int) {
+                    changedItemCount += itemCount
+                }
+
+                override fun onItemRangeRemoved(positionStart: Int, itemCount: Int) {
+                    removedItemCount += itemCount
+                }
+
+                override fun onChanged() {
+                    dataSetChangedCount += 1
+                }
+            }
+        )
+
+        adapter.submitItems(listOf(sampleItem("1")))
+        adapter.setItemSizePx(100)
+        adapter.submitItems(listOf(sampleItem("2")))
+        adapter.submitItems(emptyList())
+
+        assertEquals(1, insertedItemCount)
+        assertEquals(2, changedItemCount)
+        assertEquals(1, removedItemCount)
+        assertEquals(0, dataSetChangedCount)
+    }
+
     @Test
     fun `배너 view는 빈 목록이면 숨기고 단일 목록이면 counter를 숨긴다`() {
         val view = inflateBannerView()
@@ -533,8 +601,11 @@ class BannerViewTest {
     }
 
     private fun sampleItem(id: String) = BannerItem(
-        bannerId = id,
-        imageUrl = "https://example.com/banner-$id.png"
+        imageUrl = "https://example.com/banner-$id.png",
+        eventItem = null,
+        creatorId = id.toLongOrNull(),
+        seriesId = null,
+        link = "https://example.com/banner-$id"
     )
 
     private fun exactly(size: Int): Int = MeasureSpec.makeMeasureSpec(size, MeasureSpec.EXACTLY)