Add missing test for RoomListEntriesUpdate.Reset

Author: bmarty

libraries/matrix/impl/src/test/kotlin/io/element/android/libraries/matrix/impl/roomlist/RoomSummaryListProcessorTest.kt

@@ -13,6 +13,7 @@ import io.element.android.libraries.matrix.api.roomlist.RoomSummary
 import io.element.android.libraries.matrix.impl.fixtures.FakeRustRoomListItem
 import io.element.android.libraries.matrix.test.A_ROOM_ID
 import io.element.android.libraries.matrix.test.A_ROOM_ID_2
+import io.element.android.libraries.matrix.test.A_ROOM_ID_3
 import io.element.android.libraries.matrix.test.room.aRoomSummary
 import io.element.android.libraries.matrix.test.room.aRoomSummaryFilled
 import kotlinx.coroutines.flow.MutableStateFlow
@@ -148,6 +149,18 @@ class RoomSummaryListProcessorTest {
         assertThat(summaries.value[index].roomId).isEqualTo(A_ROOM_ID)
     }
 
+    @Test
+    fun `Rest removes all entries and add the provided ones`() = runTest {
+        summaries.value = listOf(aRoomSummaryFilled(roomId = A_ROOM_ID), aRoomSummaryFilled(A_ROOM_ID_2))
+        val processor = createProcessor()
+        val index = 0
+
+        processor.postUpdate(listOf(RoomListEntriesUpdate.Reset(listOf(FakeRustRoomListItem(A_ROOM_ID_3)))))
+
+        assertThat(summaries.value.count()).isEqualTo(1)
+        assertThat(summaries.value[index].roomId).isEqualTo(A_ROOM_ID_3)
+    }
+
     private fun TestScope.createProcessor() = RoomSummaryListProcessor(
         summaries,
         fakeRoomListService,