You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: listener_v2_test.go
    path of file: ./repos/chainlink/core/services/vrf/v2
    
    the code of the file until where you have to start completion: package v2

import (
	"encoding/json"
	"math/big"
	"testing"
	"time"

	"github.com/ethereum/go-ethereum/common"
	"github.com/ethereum/go-ethereum/core/types"
	"github.com/google/uuid"
	"github.com/stretchr/testify/assert"
	"github.com/stretchr/testify/require"

	"github.com/smartcontractkit/chainlink/v2/core/gethwrappers/generated/vrf_coordinator_v2"
	"github.com/smartcontractkit/chainlink/v2/core/services/job"
	"github.com/smartcontractkit/chainlink/v2/core/services/vrf/vrfcommon"

	"github.com/smartcontractkit/chainlink-common/pkg/sqlutil"
	clnull "github.com/smartcon
    
func TestMaybeSubtractReservedNativeV2(t *testing.T) {
	db := pgtest.NewSqlxDB(t)
	lggr := logger.TestLogger(t)
	cfg := pgtest.NewQConfig(false)
	ks := keystore.NewInMemory(db, utils.FastScryptParams, lggr, cfg)
	require.NoError(t, ks.Unlock("blah"))
	chainID := testutils.SimulatedChainID
	subID := new(big.Int).SetUint64(1)

	j, err := vrfcommon.ValidatedVRFSpec(testspecs.GenerateVRFSpec(testspecs.VRFSpecParams{
		RequestedConfsDelay: 10,
	}).Toml())
	require.NoError(t, err)
	txstore := txmgr.NewTxStore(db, logger.TestLogger(t), cfg)
	txm := makeTestTxm(t, txstore, ks)
	chain := evmmocks.NewChain(t)
	chain.On("TxManager").Return(txm).Maybe()
	listener := &listenerV2{
		respCount: map[string]uint64{},
		job:       j,
		chain:     chain,
	}
	// returns error because native payment is not supported for V2
	start, err := listener.MaybeSubtractReservedEth(testutils.Context(t), big.NewInt(100_000), chainID, subID, vrfcommon.V2)
	require.NoError(t, err)
	assert.Equal(t, big.NewInt(0), start)
}