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: startup_test.go
    path of file: ./repos/cockroach/pkg/util/startup
    
    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 startup_test

import (
	"context"
	"fmt"
	"os"
	"strconv"
	"strings"
	"sync"
	"sync/atomic"
	"testing"

	"github.com/coc
    
func TestStartupFailureRandomRange(t *testing.T) {
	defer leaktest.AfterTest(t)()
	defer log.Scope(t).Close(t)
	// This test takes 30s and so we don't want it to run in the "blocking path"
	// of CI at all, and we also don't want to stress it in nightlies as part of
	// a big package (where it will take a lot of time that could be spent running
	// "faster" tests). In this package, it is the only test and so it's fine to
	// run it under nightly (skipping nightly stressrace because race builds with
	// many nodes are very resource intensive and tend to collapse).
	skip.UnderStressRace(t, "6 nodes with replication is too slow for stress race")
	if !skip.NightlyStress() {
		skip.IgnoreLint(t, "test takes 30s to run due to circuit breakers and timeouts")
	}

	rng, seed := randutil.NewTestRand()
	t.Log("TestStartupFailureRandomRange using seed", seed)
	runCircuitBreakerTestForKey(t,
		func(spans []roachpb.Span) (good, bad []roachpb.Span) {
			spans = append([]roachpb.Span(nil), spans...) // avoid mutating input slice
			badRange := rng.Intn(len(spans))
			t.Log("triggering loss of quorum on range", spans[badRange].Key.String())
			spans[0], spans[badRange] = spans[badRange], spans[0] // swap badRange to the front
			return spans[1:], spans[:1]                           // good, bad
		})
}