text: const mockBatchGetItem = jest.fn();
  jest.mock("@aws-sdk/client-dynamodb/commands/BatchGetItemCommand", () => ({
      DynamoDB: function DynamoDB() {
          this.BatchGetItemCommand = mockBatchGetItem;
      },
  }));
  const { run } = require("../../dynamodb/src/ddb_batchgetitem");
  
  test("has to mock db#batchGetItem", async (done) => {
      await run();
      expect(mockBatchGetItem).toHaveBeenCalled;
      done();
  });
  