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: datadriven_test.go
    path of file: ./repos/cockroach/pkg/rpc
    
    the code of the file until where you have to start completion: // Copyright 2023 The Cockroach Authors.
//
// Use of this software is governed by the Business Source License
// included in the file licenses/BSL.txt.
//
// As of the Change Date specified in that file, in accordance with
// the Business Source License, use of this software will be governed
// by the Apache License, Version 2.0, included in the file
// licenses/APL.txt.

package rpc

import (
	"context"
	"fmt"
	"regexp"
	"strconv"
	"strings"
	"sync/atomic"
	"testing"
	"time"

	"github.com/cockroachdb/cockroach/pkg/kv/kvpb"
	"github.com/cockroachdb/cockroach/pkg/roachpb"
	"github.com/cockroachdb/cockroach/pkg/testutils"
	"github.com/cockroachdb/cockroach/pkg/testutils/datapathutils"
	"github.com/cockroachdb/cockroach/pkg/util"
	"github.com/cockroachdb/cockroach/pkg/util/circuit"
	"github.com/cockroachdb/cockroach/pkg/util/leaktest"
	"github.com/cockroachdb/cockroach/pkg/util/log"
	"github.com/cockroachdb/cockroach/pkg/util/netutil"
	"github.com/cockroachdb/cockroach/pkg/util/stop"
	"github.com/cockroachdb/cockroach/pkg/util/timeutil"
	"github.com/cockroachdb/cockroach/pkg/util/tracing"
	"github.com/cockroachdb/cockroach/pkg/util/uuid"
	"github.com/cockroachdb/datadriven"
	"github.com/cockroachdb/errors"
	"github.com/cockroachdb/redact"
	"github.com/stretchr/testify/require"
	"google.golang.org/grpc"
	"google.golang.org/grpc/codes"
	grpcstatus "google.golang.org/grpc/status"
)

/*
TestReconnection supports the following input data:
  - tick <duration>
  - dial <node> class=(def|sys|rf)
  - connect <node> class=(def|sys|rf)
  - set-hb-err <node> <decommissioned=(false|true)>
  - reset-hb-err <node>
  - soon [healthy=<n>] [unhealthy=<n>] [inactive=<n>]
    Verify that metrics in report matching number of healthy and unhealthy connections.

Time is automatically ticked by 1s per command. The environment currently sets
up n1 with two listener
    
func TestReconnection(t *testing.T) {
	defer leaktest.AfterTest(t)()
	datadriven.Walk(t, datapathutils.TestDataPath(t, t.Name()), func(t *testing.T, path string) {
		env := setupEnv(t)
		defer env.stopper.Stop(context.Background())
		datadriven.RunTest(t, path, func(t *testing.T, d *datadriven.TestData) string {
			ctx, collect := tracing.ContextWithRecordingSpan(context.Background(), env.tracer, d.Cmd)

			defer collect()
			env.clock.Advance(time.Second)
			switch d.Cmd {
			case "tick":
				require.Len(t, d.CmdArgs, 1)
				d, err := time.ParseDuration(d.CmdArgs[0].Key)
				require.NoError(t, err)
				env.clock.Advance(d)
				log.Eventf(ctx, "%s", env.clock.Now())
			case "dial":
				env.handleDial(env.lookupTarget(t, d.CmdArgs...), scanClass(t, d))
			case "connect":
				env.handleConnect(ctx, env.lookupTarget(t, d.CmdArgs...), scanClass(t, d))
			case "show":
				env.handleShow(ctx, env.lookupTarget(t, d.CmdArgs...), scanClass(t, d))
			case "set-hb-err":
				var dc bool
				d.MaybeScanArgs(t, "decommissioned", &dc)
				var err error
				if dc {
					err = kvpb.NewDecommissionedStatusErrorf(codes.PermissionDenied, "injected decommissioned error")
				} else {
					err = errors.New("boom")
				}

				env.handleSetHeartbeatError(err, env.lookupTargets(t, d.CmdArgs...)...)
			case "reset-hb-err":
				env.handleSetHeartbeatError(nil /* err */, env.lookupTargets(t, d.CmdArgs...)...)
			case "soon":
				var healthy int64
				var unhealthy int64
				var inactive int64
				d.MaybeScanArgs(t, "healthy", &healthy)
				d.MaybeScanArgs(t, "unhealthy", &unhealthy)
				d.MaybeScanArgs(t, "inactive", &inactive)
				if err := env.handleSoon(healthy, unhealthy, inactive); err != nil {
					t.Fatalf("%s: %v", d.Pos, err)
				}
			default:
				log.Eventf(ctx, "unknown command: %s\n", d.Cmd)
			}
			_ = env
			rec := collect()
			var buf strings.Builder
			for _, sp := range rec {
				for _, ent := range sp.Logs {
					msg := ent.Message
					// This is a crude hack, but it gets the job done: the trace has the
					// file:line printed at the beginning of the message in an unstructured
					// format, we need to get rid of that to have stable output.
					msg = redact.RedactableString(regexp.MustCompile(`^([^ ]+) (.*)`).ReplaceAllString(string(msg), `$2`))
					_, _ = fmt.Fprintln(&buf, msg)
				}
			}
			if buf.Len() == 0 {
				_, _ = buf.WriteString("ok")
			}
			return buf.String()
		})
	})
}