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: worker_test.go
    path of file: ./repos/juju/worker/caasapplicationprovisioner
    
    the code of the file until where you have to start completion: // Copyright 2020 Canonical Ltd.
// Licensed under the AGPLv3, see LICENCE file for details.

package caasapplicationprovisioner_test

import (
	"time"

	"github.com/juju/clock/testclock"
	"github.com/juju/errors"
	"github.com/juju/loggo"
	"github.com/juju/names/v5"
	jc "github.com/juju/testing/checkers"
	"github.com/juju/worker/v3"
	"github.com/juju/worker/v3/workertest"
	"go.uber.org/mock/gomock"
	gc "gopkg.in/check.v1"

	"github.com/juju/juju/caas"
	"github.com/juju/juju/core/life"
	"github.com/juju/juju/core/watcher"
	"github.com/juju/juju/core/watcher/watchertest"
	"github.com/juju/juju/rpc/params"
	coretesting "github.com/juju/juju/testing"
	"github.com/juju/juju/worker/caasapplicationprovisioner"
	"github.com/juju/juju/worker/caasapplicationprovisioner/mocks"
)

var _ = gc.Suite(&CAASApplicationSuite{})

type CAASApplicationSuite struct {
	coretesting.BaseSuite

	clock    *testclock.Clock
	modelTag names.ModelTag
	logger   loggo.Logger
}

func (s *CAASApplicationSuite) SetUpTest(c *gc.C) {
	s.clock = testclock.NewClock(time.Now())
	s.modelTag = names.NewModelTag("ffffffff-ffff-ffff-ffff-ffffffffffff")
	s.logger = loggo.GetLogger("test")
}

func (s *CAASApplicationSuite) TestWorkerStart(c *gc.C) {
	ctrl := gomock.NewController(c)
	defer ctrl.Finish()

	appChan := make(chan []string, 1)
	done := make(chan struct{})

	facade := mocks.NewMockCAASProvisionerFacade(ctrl)
	runner := mocks
    
func (s *CAASApplicationSuite) TestWorkerStartUnmanaged(c *gc.C) {
	ctrl := gomock.NewController(c)
	defer ctrl.Finish()

	appChan := make(chan []string, 1)
	done := make(chan struct{})

	facade := mocks.NewMockCAASProvisionerFacade(ctrl)
	runner := mocks.NewMockRunner(ctrl)

	facade.EXPECT().WatchApplications().DoAndReturn(func() (watcher.StringsWatcher, error) {
		appChan <- []string{"test"}
		return watchertest.NewMockStringsWatcher(appChan), nil
	})
	facade.EXPECT().ProvisionerConfig().Return(params.CAASApplicationProvisionerConfig{
		UnmanagedApplications: params.Entities{Entities: []params.Entity{{Tag: "application-test"}}},
	}, nil)
	facade.EXPECT().Life("test").Return(life.Alive, nil)
	runner.EXPECT().Worker("test", gomock.Any()).Return(nil, errors.NotFoundf(""))
	runner.EXPECT().StartWorker("test", gomock.Any()).DoAndReturn(
		func(_ string, startFunc func() (worker.Worker, error)) error {
			startFunc()
			return nil
		},
	)
	runner.EXPECT().Wait().AnyTimes().DoAndReturn(func() error {
		<-done
		return nil
	})
	runner.EXPECT().Kill().AnyTimes()

	called := false
	newWorker := func(config caasapplicationprovisioner.AppWorkerConfig) func() (worker.Worker, error) {
		c.Assert(called, jc.IsFalse)
		called = true
		mc := jc.NewMultiChecker()
		mc.AddExpr("_.Facade", gc.NotNil)
		mc.AddExpr("_.Broker", gc.NotNil)
		mc.AddExpr("_.Clock", gc.NotNil)
		mc.AddExpr("_.Logger", gc.NotNil)
		mc.AddExpr("_.ShutDownCleanUpFunc", gc.NotNil)
		c.Check(config, mc, caasapplicationprovisioner.AppWorkerConfig{
			Name:       "test",
			ModelTag:   s.modelTag,
			StatusOnly: true,
		})
		return func() (worker.Worker, error) {
			close(done)
			return workertest.NewErrorWorker(nil), nil
		}
	}
	config := caasapplicationprovisioner.Config{
		Facade:       facade,
		Broker:       struct{ caas.Broker }{},
		ModelTag:     s.modelTag,
		Clock:        s.clock,
		Logger:       s.logger,
		NewAppWorker: newWorker,
	}
	provisioner, err := caasapplicationprovisioner.NewProvisionerWorkerForTest(config, runner)
	c.Assert(err, jc.ErrorIsNil)
	c.Assert(provisioner, gc.NotNil)

	select {
	case <-done:
		c.Assert(called, jc.IsTrue)
	case <-time.After(coretesting.LongWait):
		c.Fatalf("timed out waiting for worker to start")
	}

	workertest.CleanKill(c, provisioner)
}