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: agent_test.go
    path of file: ./repos/juju/cmd/containeragent/unit
    
    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 unit_test

import (
	"fmt"
	"os"
	"path"
	"path/filepath"
	"time"

	"github.com/juju/cmd/v3/cmdtesting"
	"github.com/juju/names/v5"
	jc "github.com/juju/testing/checkers"
	"github.com/juju/utils/v3/voyeur"
	"go.uber.org/mock/gomock"
	gc "gopkg.in/check.v1"

	"github.com/juju/juju/agent"
	k8sconstants "github.com/juju/juju/caas/kubernetes/provider/constants"
	"github.com/juju/juju/cmd/containeragent/unit"
	utilsmocks "github.com/juju/juju/cmd/containeragent/utils/mocks"
	"github.com/juju/juju/cmd/jujud/agent/agentconf"
	jnames "github.com/juju/juju/juju/names"
	"github.com/juju/juju/testing"
	coretesting "github.com/juju/juju/testing"
	jujuversion "github.com/juju/juju/version"
	"github.com/juju/juju/worker/logsender"
)

type containerUnitAgentSuite struct {
	coretesting.BaseSuite

	rootDir          string
	dataDir          string
	fileReaderWriter *utilsmocks.MockFileReaderWriter
	environment      *utilsmocks.MockEnvironment
	cmd              unit.ContainerUnitAgentTest
}

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

var agentConfigContents = `
# format 2.0
controller: controller-deadbeef-1bad-500d-9000-4b1d0d06f00d
model: model-deadbeef-0bad-400d-8000-4b1d0d06f00d
tag: unit-%s-0
datadir: /home/user/.local/share/juj
    
func (s *containerUnitAgentSuite) TestParseSuccessNoContainer(c *gc.C) {
	ctrl := s.setupCommand(c, nil)
	defer ctrl.Finish()

	_ = s.prepareAgentConf(c, "wordpress")

	toolsDir := filepath.Join(s.dataDir, "tools", "unit-wordpress-0")
	gomock.InOrder(
		s.environment.EXPECT().ExpandEnv("$PATH:test-bin").Return("old-path:test-bin"),
		s.environment.EXPECT().Setenv("PATH", "old-path:test-bin").Return(nil),
		s.environment.EXPECT().Unsetenv("DELETE").Return(nil),
		s.fileReaderWriter.EXPECT().RemoveAll(toolsDir).Return(nil),
		s.fileReaderWriter.EXPECT().MkdirAll(toolsDir, os.FileMode(0755)).Return(nil),
		s.fileReaderWriter.EXPECT().Symlink(gomock.Any(), filepath.Join(toolsDir, jnames.ContainerAgent)).Return(nil),
		s.fileReaderWriter.EXPECT().Symlink(gomock.Any(), filepath.Join("/usr/bin", jnames.JujuExec)).Return(nil),
		s.fileReaderWriter.EXPECT().Symlink(gomock.Any(), filepath.Join("/usr/bin", jnames.JujuIntrospect)).Return(nil),
		s.fileReaderWriter.EXPECT().Symlink(gomock.Any(), filepath.Join(toolsDir, jnames.Jujuc)).Return(nil),
		s.environment.EXPECT().Getenv("JUJU_CONTAINER_NAMES").Return(""),
	)

	err := cmdtesting.InitCommand(s.cmd, []string{
		"--data-dir", s.dataDir,
		"--charm-modified-version", "10",
		"--append-env", "PATH=$PATH:test-bin",
		"--append-env", "DELETE=",
	})
	c.Assert(err, jc.ErrorIsNil)

	c.Assert(s.cmd.DataDir(), gc.Equals, s.dataDir)
	c.Assert(s.cmd.Tag().String(), jc.DeepEquals, `unit-wordpress-0`)
	c.Assert(s.cmd.CurrentConfig().Controller().String(), jc.DeepEquals, `controller-deadbeef-1bad-500d-9000-4b1d0d06f00d`)
	c.Assert(s.cmd.CurrentConfig().Model().String(), jc.DeepEquals, `model-deadbeef-0bad-400d-8000-4b1d0d06f00d`)
	c.Assert(s.cmd.CharmModifiedVersion(), gc.Equals, 10)
	c.Assert(len(s.cmd.GetContainerNames()), gc.Equals, 0)
}