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: multiagent_test.go
    path of file: ./repos/coder/enterprise/tailnet
    
    the code of the file until where you have to start completion: package tailnet_test

import (
	"context"
	"testing"

	"github.com/stretchr/testify/require"

	"cdr.dev/slog"
	"cdr.dev/slog/sloggers/slogtest"
	"github.com/coder/coder/v2/coderd/database/dbtestutil"
	"github.com/coder/coder/v2/enterprise/tailnet"
	agpl "github.com/coder/coder/v2/tailnet"
	"github.com/coder/coder/v2/tailnet/tailnettest"
	"github.com/coder/coder/v2/testutil"
)

// TestPGCoordinator_MultiAgent tests a single coordinator with a MultiAgent
// connecting to one age
    
func TestPGCoordinator_MultiAgent(t *testing.T) {
	t.Parallel()
	if !dbtestutil.WillUsePostgres() {
		t.Skip("test only with postgres")
	}

	logger := slogtest.Make(t, &slogtest.Options{IgnoreErrors: true}).Leveled(slog.LevelDebug)
	store, ps := dbtestutil.NewDB(t)
	ctx, cancel := context.WithTimeout(context.Background(), testutil.WaitLong)
	defer cancel()
	coord1, err := tailnet.NewPGCoord(ctx, logger.Named("coord1"), ps, store)
	require.NoError(t, err)
	defer coord1.Close()

	agent1 := newTestAgent(t, coord1, "agent1")
	defer agent1.close()
	agent1.sendNode(&agpl.Node{PreferredDERP: 5})

	ma1 := tailnettest.NewTestMultiAgent(t, coord1)
	defer ma1.Close()

	ma1.RequireSubscribeAgent(agent1.id)
	ma1.RequireEventuallyHasDERPs(ctx, 5)

	agent1.sendNode(&agpl.Node{PreferredDERP: 1})
	ma1.RequireEventuallyHasDERPs(ctx, 1)

	ma1.SendNodeWithDERP(3)
	assertEventuallyHasDERPs(ctx, t, agent1, 3)

	ma1.Close()
	require.NoError(t, agent1.close())

	assertEventuallyNoClientsForAgent(ctx, t, store, agent1.id)
	assertEventuallyLost(ctx, t, store, agent1.id)
}