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: integration_test.go
    path of file: ./repos/golang-samples/datacatalog/snippets/policytagmanager
    
    the code of the file until where you have to start completion: // Copyright 2020 Google LLC
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
//     https://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

// Package policytagmanager demonstrates interactions with the Policy
// Tag Manager client, used for managing Policy Tags.  This functionality
// underpins features in other services such as BigQuery's ability to
// define column-level access control.
package policytagmanager

import (
	"bytes"
	"fmt"
	"io/ioutil"
	"strings"
	"testing"
	"time"

	"github.com/GoogleCloudPlatform/golang-samples/internal/testutil"
)

func TestPolicyTagManager(t *testing.T) {
	tc := testutil.SystemTest(t)

	location := "us"
	// If you wish to capture output, change the output to os.Stdout.
	// Normal operation should use an instance of ioutil.Discard.
	output := ioutil.Discard

	taxonomyName := fmt.Sprintf("example-taxonomy-%d", time.Now().UnixNano())
	taxID, err := createTaxonomy(output, tc.ProjectID, location, taxonomyName)
	if err != nil {
		t.Errorf("createTaxonomy: %v", err)
	}
	defer deleteTaxonomy(taxID)

	if err := getTaxonomy(output, taxID); err != nil {
		t.Errorf("getTaxonomy: %v", err)
	}

	if err := listTaxonomies(output, tc.ProjectID, location); err != nil {
		t.Errorf("listTaxonomies: %v", err)
	}

	// Create some policy tags
	displayName := "PII Tag"
	tagOne, err := createPolicyTag(output, taxID, displayName, "")
	if err != nil {
		t.Errorf("createPolicyTag(%s): %v", displayName, err)
	}

	displayName = "Child PII Tag"
	tagTwo, err := createPolicyTag(output, taxID, displayName, tagOne)
	if err != nil {
		t.Errorf("createPolicyTag(%s): %v", displayName, err)
	}

	if err := getPolicyTag(output, tagOne); err != nil {
		t.Errorf("getPolicyTag(%s): %v", tagOne, err)
	}

	probedPermissions := []string{
		"datacatalog.categories.fineGrainedGet",
	}
	// check before setting policy
	v
    
func TestPolicyTagManager(t *testing.T) {
	tc := testutil.SystemTest(t)

	location := "us"
	// If you wish to capture output, change the output to os.Stdout.
	// Normal operation should use an instance of ioutil.Discard.
	output := ioutil.Discard

	taxonomyName := fmt.Sprintf("example-taxonomy-%d", time.Now().UnixNano())
	taxID, err := createTaxonomy(output, tc.ProjectID, location, taxonomyName)
	if err != nil {
		t.Errorf("createTaxonomy: %v", err)
	}
	defer deleteTaxonomy(taxID)

	if err := getTaxonomy(output, taxID); err != nil {
		t.Errorf("getTaxonomy: %v", err)
	}

	if err := listTaxonomies(output, tc.ProjectID, location); err != nil {
		t.Errorf("listTaxonomies: %v", err)
	}

	// Create some policy tags
	displayName := "PII Tag"
	tagOne, err := createPolicyTag(output, taxID, displayName, "")
	if err != nil {
		t.Errorf("createPolicyTag(%s): %v", displayName, err)
	}

	displayName = "Child PII Tag"
	tagTwo, err := createPolicyTag(output, taxID, displayName, tagOne)
	if err != nil {
		t.Errorf("createPolicyTag(%s): %v", displayName, err)
	}

	if err := getPolicyTag(output, tagOne); err != nil {
		t.Errorf("getPolicyTag(%s): %v", tagOne, err)
	}

	probedPermissions := []string{
		"datacatalog.categories.fineGrainedGet",
	}
	// check before setting policy
	var buf bytes.Buffer
	if err := testIAMPermissions(&buf, tagOne, probedPermissions); err != nil {
		t.Errorf("testIAMPermissions(%s): %v", tagOne, err)
	}
	wantedResp := "of the 1 permissions probed, caller has 0 permissions"
	if !strings.Contains(buf.String(), wantedResp) {
		t.Errorf("unexpected output (%q) did not contain (%s)", buf.String(), wantedResp)
	}
	buf.Reset()

	if err := setIAMPolicy(output, tagOne, "allAuthenticatedUsers"); err != nil {
		t.Errorf("setIAMPolicy(%s): %v", tagOne, err)
	}

	if err := testIAMPermissions(&buf, tagOne, probedPermissions); err != nil {
		t.Errorf("testIAMPermissions(%s): %v", tagOne, err)
	}
	wantedResp = "of the 1 permissions probed, caller has 1 permissions: datacatalog.categories.fineGrainedGet"
	if !strings.Contains(buf.String(), wantedResp) {
		t.Errorf("unexpected output (%q) did not contain (%s)", buf.String(), wantedResp)
	}
	buf.Reset()

	if err := getIAMPolicy(output, tagOne); err != nil {
		t.Errorf("getIAMPolicy(%s): %v", tagOne, err)
	}

	if err := listPolicyTags(output, taxID); err != nil {
		t.Errorf("listPolicyTags: %v", err)
	}

	// delete a Policy tag
	if err := deletePolicyTag(tagTwo); err != nil {
		t.Errorf("deletePolicyTag(%s): %v", tagTwo, err)
	}

	if err := deleteTaxonomy(taxID); err != nil {
		t.Errorf("deleteTaxonomy: %v", err)
	}

}