@taquito/taquito

// A regular transfer operation is made. No smart contract calls required for this scenario.
      const opTransferToContract = await Tezos.contract.transfer({ to: contract.address, amount: 1 })
      await opTransferToContract.confirmation();
      expect(op.status).toEqual('applied')
      // Transfer from contract (kt1_alice) to implicit account (tz1)
      // We pass a lambda function to the kt1_alice contracts `do` entrypoint. The lambda code causes the contract to transfer
      // the specified number (50) of mutez to the target address.
      const opTransfer = await contract.methods.do(MANAGER_LAMBDA.transferImplicit("tz1eY5Aqa1kXDFoiebL28emyXFoneAoVg1zh", 50)).send({ amount: 0 })
      await opTransfer.confirmation();
      expect(opTransfer.status).toEqual('applied')
      // Set delegate on contract kt1_alice by passing a lambda function to kt1_alice's `do` entrypoint
      const opSetDelegate = await contract.methods.do(MANAGER_LAMBDA.setDelegate("tz1eY5Aqa1kXDFoiebL28emyXFoneAoVg1zh")).send({ amount: 0 })
      await opSetDelegate.confirmation();
      expect(opSetDelegate.status).toEqual('applied')
      // Remove delegate on contract kt1_alice by passing a lambda function to kt1_alice's `do` entrypoint
      const removeDelegateOp = await contract.methods.do(MANAGER_LAMBDA.removeDelegate()).send({ amount: 0 })
      await removeDelegateOp.confirmation();
      expect(removeDelegateOp.status).toEqual('applied')
      // Transfer from contract (kt1_alice) to contract (kt1 bob)
      // Notice that we are instructing the kt1_alice contract to send 1 token to kt1_bob. The transfer value is passed to the
      // lambda helper function. The transfer amount in the actual transfer operation is 0. We are not transferring the token
      // in the transfer operation, we are instructing the contract to transfer the token using the `do` entrypoint of the kt1_alice
      // contract.
      const transferToContractOp = await contract.methods.do(MANAGER_LAMBDA.transferToContract("KT1EM2LvxxFGB3Svh9p9HCP2jEEYyHjABMbK", 1)).send({ amount: 0 })
      await transferToContractOp.confirmation();
      expect(transferToContractOp.status).toEqual('applied')
      done();
    })
  })