fix(node) Unit tests hangs and don't exit (#396)

node/src/index.ts

@@ -23,7 +23,7 @@ import { Query } from './query'
 import { isEmbeddingFunction } from './embedding/embedding_function'
 
 // eslint-disable-next-line @typescript-eslint/no-var-requires
-const { databaseNew, databaseTableNames, databaseOpenTable, databaseDropTable, tableCreate, tableAdd, tableCreateVectorIndex, tableCountRows, tableDelete } = require('../native.js')
+const { databaseNew, databaseTableNames, databaseOpenTable, databaseDropTable, tableCreate, tableAdd, tableCreateVectorIndex, tableCountRows, tableDelete, tableClose } = require('../native.js')
 
 export { Query }
 export type { EmbeddingFunction }
@@ -215,6 +215,12 @@ export interface Table<T = number[]> {
    * ```
    */
   delete: (filter: string) => Promise<void>
+
+  /**
+   * Immediately closes the connection to this Table. After close is called,
+   * all operations on this Table will fail.
+   */
+  close: () => Promise<void>
 }
 
 /**
@@ -402,6 +408,14 @@ export class LocalTable<T = number[]> implements Table<T> {
   async delete (filter: string): Promise<void> {
     return tableDelete.call(this._tbl, filter)
   }
+
+  /**
+   * Immediately closes the connection to this Table. After close is called,
+   * all operations on this Table will fail.
+   */
+  async close (): Promise<void> {
+    return tableClose.call(this._tbl)
+  }
 }
 
 /// Config to build IVF_PQ index.

node/src/remote/index.ts

@@ -165,4 +165,8 @@ export class RemoteTable<T = number[]> implements Table<T> {
   async delete (filter: string): Promise<void> {
     throw new Error('Not implemented')
   }
+
+  async close (): Promise<void> {
+    throw new Error('Not implemented')
+  }
 }