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: vrf_consumer_base_test.go
    path of file: ./repos/chainlink/core/services/vrf/solidity_cross_tests
    
    the code of the file until where you have to start completion: package solidity_cross_tests_test

import (
	"math/big"
	"testing"

	"github.com/stretchr/testify/require"

	"github.com/smartcontractkit/chainlink/v2/core/internal/cl
    
func TestConsumerBaseRejectsBadVRFCoordinator(t *testing.T) {
	key := cltest.MustGenerateRandomKey(t)
	coordinator := vrftesthelpers.NewVRFCoordinatorUniverse(t, key)
	keyHash, _ /* jobID */, fee := registerProvingKey(t, coordinator)
	log := requestRandomness(t, coordinator, keyHash, fee)
	// Ensure that VRFConsumerBase.rawFulfillRandomness's check,
	// require(msg.sender==vrfCoordinator), by using the wrong sender address.
	_, err := coordinator.ConsumerContract.RawFulfillRandomness(coordinator.Neil,
		keyHash, big.NewInt(0).SetBytes([]byte("a bad random value")))
	require.Error(t, err)
	// Verify that correct fulfilment is possible, in this setup
	_ = fulfillRandomnessRequest(t, coordinator, *log)
}