Improve room test reliability

Author: simolus3

integrations/room/src/commonIntegrationTest/kotlin/com/powersync/integrations/room/PowerSyncRoomTest.kt

@@ -88,6 +88,8 @@ class PowerSyncRoomTest {
                 turbine.awaitItem() shouldHaveSize 1
                 turbine.cancel()
             }
+
+            powersync.close()
         }
 
     @Test
@@ -108,6 +110,7 @@ class PowerSyncRoomTest {
             database.userDao().getAll() shouldHaveSize 0
             powersync.execute("insert into user values (uuid(), ?)", listOf("PowerSync user"))
             database.userDao().getAll() shouldHaveSize 1
+            powersync.close()
         }
 
     @Test
@@ -133,5 +136,7 @@ class PowerSyncRoomTest {
                 turbine.awaitItem() shouldHaveSize 1
                 turbine.cancel()
             }
+
+            powersync.close()
         }
 }

integrations/room/src/commonMain/kotlin/com/powersync/integrations/room/RoomConnectionPool.kt

@@ -91,7 +91,7 @@ public class RoomConnectionPool(
                 val changed =
                     it.usePrepared("SELECT powersync_update_hooks('get')") { stmt ->
                         check(stmt.step())
-                        json.decodeFromString<Set<String>>(stmt.getText(0))
+                        Json.decodeFromString<Set<String>>(stmt.getText(0))
                     }
 
                 val userTables =
@@ -114,10 +114,6 @@ public class RoomConnectionPool(
     override suspend fun close() {
         // Noop, Room database managed independently
     }
-
-    private companion object {
-        val json = Json {}
-    }
 }
 
 private class RoomTransactionLease(