vendor/k8s.io/kubernetes/pkg/kubelet/cm/cpumanager/state/state_file_test.go - cloudstack-kubernetes-provider - Git at Google

 /*
 Copyright 2017 The Kubernetes Authors.

 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

     http://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 state

 import (
 	"bytes"
 	"fmt"
 	"io"
 	"io/ioutil"
 	"os"
 	"path"
 	"reflect"
 	"strings"
 	"testing"

 	"k8s.io/kubernetes/pkg/kubelet/cm/cpuset"
 )

 func writeToStateFile(statefile string, content string) {
 	ioutil.WriteFile(statefile, []byte(content), 0644)
 }

 // AssertStateEqual marks provided test as failed if provided states differ
 func AssertStateEqual(t *testing.T, sf State, sm State) {
 	cpusetSf := sf.GetDefaultCPUSet()
 	cpusetSm := sm.GetDefaultCPUSet()
 	if !cpusetSf.Equals(cpusetSm) {
 		t.Errorf("State CPUSet mismatch. Have %v, want %v", cpusetSf, cpusetSm)
 	}

 	cpuassignmentSf := sf.GetCPUAssignments()
 	cpuassignmentSm := sm.GetCPUAssignments()
 	if !reflect.DeepEqual(cpuassignmentSf, cpuassignmentSm) {
 		t.Errorf("State CPU assignments mismatch. Have %s, want %s", cpuassignmentSf, cpuassignmentSm)
 	}
 }

 func stderrCapture(t *testing.T, f func() State) (bytes.Buffer, State) {
 	stderr := os.Stderr

 	readBuffer, writeBuffer, err := os.Pipe()
 	if err != nil {
 		t.Errorf("cannot create pipe: %v", err.Error())
 	}

 	os.Stderr = writeBuffer
 	var outputBuffer bytes.Buffer

 	state := f()
 	writeBuffer.Close()
 	io.Copy(&outputBuffer, readBuffer)
 	os.Stderr = stderr

 	return outputBuffer, state
 }

 func TestFileStateTryRestore(t *testing.T) {
 	testCases := []struct {
 		description      string
 		stateFileContent string
 		policyName       string
 		expErr           string
 		expPanic         bool
 		expectedState    *stateMemory
 	}{
 		{
 			"Invalid JSON - one byte file",
 			"\n",
 			"none",
 			"[cpumanager] state file: unable to restore state from disk (unexpected end of JSON input)",
 			true,
 			&stateMemory{},
 		},
 		{
 			"Invalid JSON - invalid content",
 			"{",
 			"none",
 			"[cpumanager] state file: unable to restore state from disk (unexpected end of JSON input)",
 			true,
 			&stateMemory{},
 		},
 		{
 			"Try restore defaultCPUSet only",
 			`{"policyName": "none", "defaultCpuSet": "4-6"}`,
 			"none",
 			"",
 			false,
 			&stateMemory{
 				assignments:   ContainerCPUAssignments{},
 				defaultCPUSet: cpuset.NewCPUSet(4, 5, 6),
 			},
 		},
 		{
 			"Try restore defaultCPUSet only - invalid name",
 			`{"policyName": "none", "defaultCpuSet" "4-6"}`,
 			"none",
 			`[cpumanager] state file: unable to restore state from disk (invalid character '"' after object key)`,
 			true,
 			&stateMemory{},
 		},
 		{
 			"Try restore assignments only",
 			`{
 				"policyName": "none",
 				"entries": {
 					"container1": "4-6",
 					"container2": "1-3"
 				}
 			}`,
 			"none",
 			"",
 			false,
 			&stateMemory{
 				assignments: ContainerCPUAssignments{
 					"container1": cpuset.NewCPUSet(4, 5, 6),
 					"container2": cpuset.NewCPUSet(1, 2, 3),
 				},
 				defaultCPUSet: cpuset.NewCPUSet(),
 			},
 		},
 		{
 			"Try restore invalid policy name",
 			`{
 				"policyName": "A",
 				"defaultCpuSet": "0-7",
 				"entries": {}
 			}`,
 			"B",
 			`[cpumanager] state file: unable to restore state from disk (policy configured "B" != policy from state file "A")`,
 			true,
 			&stateMemory{},
 		},
 		{
 			"Try restore invalid assignments",
 			`{"entries": }`,
 			"none",
 			"[cpumanager] state file: unable to restore state from disk (invalid character '}' looking for beginning of value)",
 			true,
 			&stateMemory{},
 		},
 		{
 			"Try restore valid file",
 			`{
 				"policyName": "none",
 				"defaultCpuSet": "23-24",
 				"entries": {
 					"container1": "4-6",
 					"container2": "1-3"
 				}
 			}`,
 			"none",
 			"",
 			false,
 			&stateMemory{
 				assignments: ContainerCPUAssignments{
 					"container1": cpuset.NewCPUSet(4, 5, 6),
 					"container2": cpuset.NewCPUSet(1, 2, 3),
 				},
 				defaultCPUSet: cpuset.NewCPUSet(23, 24),
 			},
 		},
 		{
 			"Try restore un-parsable defaultCPUSet ",
 			`{
 				"policyName": "none",
 				"defaultCpuSet": "2-sd"
 			}`,
 			"none",
 			`[cpumanager] state file: unable to restore state from disk (strconv.Atoi: parsing "sd": invalid syntax)`,
 			true,
 			&stateMemory{},
 		},
 		{
 			"Try restore un-parsable assignments",
 			`{
 				"policyName": "none",
 				"defaultCpuSet": "23-24",
 				"entries": {
 					"container1": "p-6",
 					"container2": "1-3"
 				}
 			}`,
 			"none",
 			`[cpumanager] state file: unable to restore state from disk (strconv.Atoi: parsing "p": invalid syntax)`,
 			true,
 			&stateMemory{},
 		},
 		{
 			"tryRestoreState creates empty state file",
 			"",
 			"none",
 			"",
 			false,
 			&stateMemory{
 				assignments:   ContainerCPUAssignments{},
 				defaultCPUSet: cpuset.NewCPUSet(),
 			},
 		},
 	}

 	for idx, tc := range testCases {
 		t.Run(tc.description, func(t *testing.T) {
 			defer func() {
 				if tc.expPanic {
 					r := recover()
 					panicMsg := r.(string)
 					if !strings.HasPrefix(panicMsg, tc.expErr) {
 						t.Fatalf(`expected panic "%s" but got "%s"`, tc.expErr, panicMsg)
 					} else {
 						t.Logf(`got expected panic "%s"`, panicMsg)
 					}
 				}
 			}()

 			sfilePath, err := ioutil.TempFile("/tmp", fmt.Sprintf("cpumanager_state_file_test_%d", idx))
 			if err != nil {
 				t.Errorf("cannot create temporary file: %q", err.Error())
 			}
 			// Don't create state file, let tryRestoreState figure out that is should create
 			if tc.stateFileContent != "" {
 				writeToStateFile(sfilePath.Name(), tc.stateFileContent)
 			}

 			// Always remove file - regardless of who created
 			defer os.Remove(sfilePath.Name())

 			logData, fileState := stderrCapture(t, func() State {
 				return NewFileState(sfilePath.Name(), tc.policyName)
 			})

 			if tc.expErr != "" {
 				if logData.String() != "" {
 					if !strings.Contains(logData.String(), tc.expErr) {
 						t.Errorf("tryRestoreState() error = %v, wantErr %v", logData.String(), tc.expErr)
 						return
 					}
 				} else {
 					t.Errorf("tryRestoreState() error = nil, wantErr %v", tc.expErr)
 					return
 				}
 			}

 			AssertStateEqual(t, fileState, tc.expectedState)
 		})
 	}
 }

 func TestFileStateTryRestorePanic(t *testing.T) {

 	testCase := struct {
 		description  string
 		wantPanic    bool
 		panicMessage string
 	}{
 		"Panic creating file",
 		true,
 		"[cpumanager] state file not written",
 	}

 	t.Run(testCase.description, func(t *testing.T) {
 		sfilePath := path.Join("/invalid_path/to_some_dir", "cpumanager_state_file_test")
 		defer func() {
 			if err := recover(); err != nil {
 				if testCase.wantPanic {
 					if testCase.panicMessage == err {
 						t.Logf("tryRestoreState() got expected panic = %v", err)
 						return
 					}
 					t.Errorf("tryRestoreState() unexpected panic = %v, wantErr %v", err, testCase.panicMessage)
 				}
 			}
 		}()
 		NewFileState(sfilePath, "static")
 	})
 }

 func TestUpdateStateFile(t *testing.T) {
 	testCases := []struct {
 		description   string
 		expErr        string
 		expectedState *stateMemory
 	}{
 		{
 			"Save empty state",
 			"",
 			&stateMemory{
 				assignments:   ContainerCPUAssignments{},
 				defaultCPUSet: cpuset.NewCPUSet(),
 			},
 		},
 		{
 			"Save defaultCPUSet only",
 			"",
 			&stateMemory{
 				assignments:   ContainerCPUAssignments{},
 				defaultCPUSet: cpuset.NewCPUSet(1, 6),
 			},
 		},
 		{
 			"Save assignments only",
 			"",
 			&stateMemory{
 				assignments: ContainerCPUAssignments{
 					"container1": cpuset.NewCPUSet(4, 5, 6),
 					"container2": cpuset.NewCPUSet(1, 2, 3),
 				},
 				defaultCPUSet: cpuset.NewCPUSet(),
 			},
 		},
 	}

 	for idx, tc := range testCases {
 		t.Run(tc.description, func(t *testing.T) {

 			sfilePath, err := ioutil.TempFile("/tmp", fmt.Sprintf("cpumanager_state_file_test_%d", idx))
 			defer os.Remove(sfilePath.Name())
 			if err != nil {
 				t.Errorf("cannot create temporary file: %q", err.Error())
 			}
 			fileState := stateFile{
 				stateFilePath: sfilePath.Name(),
 				policyName:    "static",
 				cache:         NewMemoryState(),
 			}

 			fileState.SetDefaultCPUSet(tc.expectedState.defaultCPUSet)
 			fileState.SetCPUAssignments(tc.expectedState.assignments)

 			logData, _ := stderrCapture(t, func() State {
 				fileState.storeState()
 				return &stateFile{}
 			})

 			errMsg := logData.String()

 			if tc.expErr != "" {
 				if errMsg != "" {
 					if errMsg != tc.expErr {
 						t.Errorf("UpdateStateFile() error = %v, wantErr %v", errMsg, tc.expErr)
 						return
 					}
 				} else {
 					t.Errorf("UpdateStateFile() error = nil, wantErr %v", tc.expErr)
 					return
 				}
 			} else {
 				if errMsg != "" {
 					t.Errorf("UpdateStateFile() error = %v, wantErr nil", errMsg)
 					return
 				}
 			}
 			newFileState := NewFileState(sfilePath.Name(), "static")
 			AssertStateEqual(t, newFileState, tc.expectedState)
 		})
 	}
 }

 func TestHelpersStateFile(t *testing.T) {
 	testCases := []struct {
 		description   string
 		defaultCPUset cpuset.CPUSet
 		containers    map[string]cpuset.CPUSet
 	}{
 		{
 			description:   "one container",
 			defaultCPUset: cpuset.NewCPUSet(0, 1, 2, 3, 4, 5, 6, 7, 8),
 			containers: map[string]cpuset.CPUSet{
 				"c1": cpuset.NewCPUSet(0, 1),
 			},
 		},
 		{
 			description:   "two containers",
 			defaultCPUset: cpuset.NewCPUSet(0, 1, 2, 3, 4, 5, 6, 7, 8),
 			containers: map[string]cpuset.CPUSet{
 				"c1": cpuset.NewCPUSet(0, 1),
 				"c2": cpuset.NewCPUSet(2, 3, 4, 5),
 			},
 		},
 		{
 			description:   "container with more cpus than is possible",
 			defaultCPUset: cpuset.NewCPUSet(0, 1, 2, 3, 4, 5, 6, 7, 8),
 			containers: map[string]cpuset.CPUSet{
 				"c1": cpuset.NewCPUSet(0, 10),
 			},
 		},
 		{
 			description:   "container without assigned cpus",
 			defaultCPUset: cpuset.NewCPUSet(0, 1, 2, 3, 4, 5, 6, 7, 8),
 			containers: map[string]cpuset.CPUSet{
 				"c1": cpuset.NewCPUSet(),
 			},
 		},
 	}

 	for _, tc := range testCases {
 		t.Run(tc.description, func(t *testing.T) {
 			sfFile, err := ioutil.TempFile("/tmp", "testHelpersStateFile")
 			defer os.Remove(sfFile.Name())
 			if err != nil {
 				t.Errorf("cannot create temporary test file: %q", err.Error())
 			}

 			state := NewFileState(sfFile.Name(), "static")
 			state.SetDefaultCPUSet(tc.defaultCPUset)

 			for containerName, containerCPUs := range tc.containers {
 				state.SetCPUSet(containerName, containerCPUs)
 				if cpus, _ := state.GetCPUSet(containerName); !cpus.Equals(containerCPUs) {
 					t.Errorf("state is inconsistent. Wants = %q Have = %q", containerCPUs, cpus)
 				}
 				state.Delete(containerName)
 				if cpus := state.GetCPUSetOrDefault(containerName); !cpus.Equals(tc.defaultCPUset) {
 					t.Error("deleted container still existing in state")
 				}

 			}

 		})
 	}
 }

 func TestClearStateStateFile(t *testing.T) {
 	testCases := []struct {
 		description   string
 		defaultCPUset cpuset.CPUSet
 		containers    map[string]cpuset.CPUSet
 	}{
 		{
 			description:   "valid file",
 			defaultCPUset: cpuset.NewCPUSet(0, 1, 2, 3, 4, 5, 6, 7, 8),
 			containers: map[string]cpuset.CPUSet{
 				"c1": cpuset.NewCPUSet(0, 1),
 				"c2": cpuset.NewCPUSet(2, 3),
 				"c3": cpuset.NewCPUSet(4, 5),
 			},
 		},
 	}
 	for _, testCase := range testCases {
 		t.Run(testCase.description, func(t *testing.T) {
 			sfFile, err := ioutil.TempFile("/tmp", "testHelpersStateFile")
 			defer os.Remove(sfFile.Name())
 			if err != nil {
 				t.Errorf("cannot create temporary test file: %q", err.Error())
 			}

 			state := NewFileState(sfFile.Name(), "static")
 			state.SetDefaultCPUSet(testCase.defaultCPUset)
 			for containerName, containerCPUs := range testCase.containers {
 				state.SetCPUSet(containerName, containerCPUs)
 			}

 			state.ClearState()
 			if !cpuset.NewCPUSet().Equals(state.GetDefaultCPUSet()) {
 				t.Error("cleared state shoudn't has got information about available cpuset")
 			}
 			for containerName := range testCase.containers {
 				if !cpuset.NewCPUSet().Equals(state.GetCPUSetOrDefault(containerName)) {
 					t.Error("cleared state shoudn't has got information about containers")
 				}
 			}
 		})
 	}
 }
	/*
	Copyright 2017 The Kubernetes Authors.

	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

	http://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 state

	import (
	"bytes"
	"fmt"
	"io"
	"io/ioutil"
	"os"
	"path"
	"reflect"
	"strings"
	"testing"

	"k8s.io/kubernetes/pkg/kubelet/cm/cpuset"
	)

	func writeToStateFile(statefile string, content string) {
	ioutil.WriteFile(statefile, []byte(content), 0644)
	}

	// AssertStateEqual marks provided test as failed if provided states differ
	func AssertStateEqual(t *testing.T, sf State, sm State) {
	cpusetSf := sf.GetDefaultCPUSet()
	cpusetSm := sm.GetDefaultCPUSet()
	if !cpusetSf.Equals(cpusetSm) {
	t.Errorf("State CPUSet mismatch. Have %v, want %v", cpusetSf, cpusetSm)
	}

	cpuassignmentSf := sf.GetCPUAssignments()
	cpuassignmentSm := sm.GetCPUAssignments()
	if !reflect.DeepEqual(cpuassignmentSf, cpuassignmentSm) {
	t.Errorf("State CPU assignments mismatch. Have %s, want %s", cpuassignmentSf, cpuassignmentSm)
	}
	}

	func stderrCapture(t *testing.T, f func() State) (bytes.Buffer, State) {
	stderr := os.Stderr

	readBuffer, writeBuffer, err := os.Pipe()
	if err != nil {
	t.Errorf("cannot create pipe: %v", err.Error())
	}

	os.Stderr = writeBuffer
	var outputBuffer bytes.Buffer

	state := f()
	writeBuffer.Close()
	io.Copy(&outputBuffer, readBuffer)
	os.Stderr = stderr

	return outputBuffer, state
	}

	func TestFileStateTryRestore(t *testing.T) {
	testCases := []struct {
	description string
	stateFileContent string
	policyName string
	expErr string
	expPanic bool
	expectedState *stateMemory
	}{
	{
	"Invalid JSON - one byte file",
	"\n",
	"none",
	"[cpumanager] state file: unable to restore state from disk (unexpected end of JSON input)",
	true,
	&stateMemory{},
	},
	{
	"Invalid JSON - invalid content",
	"{",
	"none",
	"[cpumanager] state file: unable to restore state from disk (unexpected end of JSON input)",
	true,
	&stateMemory{},
	},
	{
	"Try restore defaultCPUSet only",
	`{"policyName": "none", "defaultCpuSet": "4-6"}`,
	"none",
	"",
	false,
	&stateMemory{
	assignments: ContainerCPUAssignments{},
	defaultCPUSet: cpuset.NewCPUSet(4, 5, 6),
	},
	},
	{
	"Try restore defaultCPUSet only - invalid name",
	`{"policyName": "none", "defaultCpuSet" "4-6"}`,
	"none",
	`[cpumanager] state file: unable to restore state from disk (invalid character '"' after object key)`,
	true,
	&stateMemory{},
	},
	{
	"Try restore assignments only",
	`{
	"policyName": "none",
	"entries": {
	"container1": "4-6",
	"container2": "1-3"
	}
	}`,
	"none",
	"",
	false,
	&stateMemory{
	assignments: ContainerCPUAssignments{
	"container1": cpuset.NewCPUSet(4, 5, 6),
	"container2": cpuset.NewCPUSet(1, 2, 3),
	},
	defaultCPUSet: cpuset.NewCPUSet(),
	},
	},
	{
	"Try restore invalid policy name",
	`{
	"policyName": "A",
	"defaultCpuSet": "0-7",
	"entries": {}
	}`,
	"B",
	`[cpumanager] state file: unable to restore state from disk (policy configured "B" != policy from state file "A")`,
	true,
	&stateMemory{},
	},
	{
	"Try restore invalid assignments",
	`{"entries": }`,
	"none",
	"[cpumanager] state file: unable to restore state from disk (invalid character '}' looking for beginning of value)",
	true,
	&stateMemory{},
	},
	{
	"Try restore valid file",
	`{
	"policyName": "none",
	"defaultCpuSet": "23-24",
	"entries": {
	"container1": "4-6",
	"container2": "1-3"
	}
	}`,
	"none",
	"",
	false,
	&stateMemory{
	assignments: ContainerCPUAssignments{
	"container1": cpuset.NewCPUSet(4, 5, 6),
	"container2": cpuset.NewCPUSet(1, 2, 3),
	},
	defaultCPUSet: cpuset.NewCPUSet(23, 24),
	},
	},
	{
	"Try restore un-parsable defaultCPUSet ",
	`{
	"policyName": "none",
	"defaultCpuSet": "2-sd"
	}`,
	"none",
	`[cpumanager] state file: unable to restore state from disk (strconv.Atoi: parsing "sd": invalid syntax)`,
	true,
	&stateMemory{},
	},
	{
	"Try restore un-parsable assignments",
	`{
	"policyName": "none",
	"defaultCpuSet": "23-24",
	"entries": {
	"container1": "p-6",
	"container2": "1-3"
	}
	}`,
	"none",
	`[cpumanager] state file: unable to restore state from disk (strconv.Atoi: parsing "p": invalid syntax)`,
	true,
	&stateMemory{},
	},
	{
	"tryRestoreState creates empty state file",
	"",
	"none",
	"",
	false,
	&stateMemory{
	assignments: ContainerCPUAssignments{},
	defaultCPUSet: cpuset.NewCPUSet(),
	},
	},
	}

	for idx, tc := range testCases {
	t.Run(tc.description, func(t *testing.T) {
	defer func() {
	if tc.expPanic {
	r := recover()
	panicMsg := r.(string)
	if !strings.HasPrefix(panicMsg, tc.expErr) {
	t.Fatalf(`expected panic "%s" but got "%s"`, tc.expErr, panicMsg)
	} else {
	t.Logf(`got expected panic "%s"`, panicMsg)
	}
	}
	}()

	sfilePath, err := ioutil.TempFile("/tmp", fmt.Sprintf("cpumanager_state_file_test_%d", idx))
	if err != nil {
	t.Errorf("cannot create temporary file: %q", err.Error())
	}
	// Don't create state file, let tryRestoreState figure out that is should create
	if tc.stateFileContent != "" {
	writeToStateFile(sfilePath.Name(), tc.stateFileContent)
	}

	// Always remove file - regardless of who created
	defer os.Remove(sfilePath.Name())

	logData, fileState := stderrCapture(t, func() State {
	return NewFileState(sfilePath.Name(), tc.policyName)
	})

	if tc.expErr != "" {
	if logData.String() != "" {
	if !strings.Contains(logData.String(), tc.expErr) {
	t.Errorf("tryRestoreState() error = %v, wantErr %v", logData.String(), tc.expErr)
	return
	}
	} else {
	t.Errorf("tryRestoreState() error = nil, wantErr %v", tc.expErr)
	return
	}
	}

	AssertStateEqual(t, fileState, tc.expectedState)
	})
	}
	}

	func TestFileStateTryRestorePanic(t *testing.T) {

	testCase := struct {
	description string
	wantPanic bool
	panicMessage string
	}{
	"Panic creating file",
	true,
	"[cpumanager] state file not written",
	}

	t.Run(testCase.description, func(t *testing.T) {
	sfilePath := path.Join("/invalid_path/to_some_dir", "cpumanager_state_file_test")
	defer func() {
	if err := recover(); err != nil {
	if testCase.wantPanic {
	if testCase.panicMessage == err {
	t.Logf("tryRestoreState() got expected panic = %v", err)
	return
	}
	t.Errorf("tryRestoreState() unexpected panic = %v, wantErr %v", err, testCase.panicMessage)
	}
	}
	}()
	NewFileState(sfilePath, "static")
	})
	}

	func TestUpdateStateFile(t *testing.T) {
	testCases := []struct {
	description string
	expErr string
	expectedState *stateMemory
	}{
	{
	"Save empty state",
	"",
	&stateMemory{
	assignments: ContainerCPUAssignments{},
	defaultCPUSet: cpuset.NewCPUSet(),
	},
	},
	{
	"Save defaultCPUSet only",
	"",
	&stateMemory{
	assignments: ContainerCPUAssignments{},
	defaultCPUSet: cpuset.NewCPUSet(1, 6),
	},
	},
	{
	"Save assignments only",
	"",
	&stateMemory{
	assignments: ContainerCPUAssignments{
	"container1": cpuset.NewCPUSet(4, 5, 6),
	"container2": cpuset.NewCPUSet(1, 2, 3),
	},
	defaultCPUSet: cpuset.NewCPUSet(),
	},
	},
	}

	for idx, tc := range testCases {
	t.Run(tc.description, func(t *testing.T) {

	sfilePath, err := ioutil.TempFile("/tmp", fmt.Sprintf("cpumanager_state_file_test_%d", idx))
	defer os.Remove(sfilePath.Name())
	if err != nil {
	t.Errorf("cannot create temporary file: %q", err.Error())
	}
	fileState := stateFile{
	stateFilePath: sfilePath.Name(),
	policyName: "static",
	cache: NewMemoryState(),
	}

	fileState.SetDefaultCPUSet(tc.expectedState.defaultCPUSet)
	fileState.SetCPUAssignments(tc.expectedState.assignments)

	logData, _ := stderrCapture(t, func() State {
	fileState.storeState()
	return &stateFile{}
	})

	errMsg := logData.String()

	if tc.expErr != "" {
	if errMsg != "" {
	if errMsg != tc.expErr {
	t.Errorf("UpdateStateFile() error = %v, wantErr %v", errMsg, tc.expErr)
	return
	}
	} else {
	t.Errorf("UpdateStateFile() error = nil, wantErr %v", tc.expErr)
	return
	}
	} else {
	if errMsg != "" {
	t.Errorf("UpdateStateFile() error = %v, wantErr nil", errMsg)
	return
	}
	}
	newFileState := NewFileState(sfilePath.Name(), "static")
	AssertStateEqual(t, newFileState, tc.expectedState)
	})
	}
	}

	func TestHelpersStateFile(t *testing.T) {
	testCases := []struct {
	description string
	defaultCPUset cpuset.CPUSet
	containers map[string]cpuset.CPUSet
	}{
	{
	description: "one container",
	defaultCPUset: cpuset.NewCPUSet(0, 1, 2, 3, 4, 5, 6, 7, 8),
	containers: map[string]cpuset.CPUSet{
	"c1": cpuset.NewCPUSet(0, 1),
	},
	},
	{
	description: "two containers",
	defaultCPUset: cpuset.NewCPUSet(0, 1, 2, 3, 4, 5, 6, 7, 8),
	containers: map[string]cpuset.CPUSet{
	"c1": cpuset.NewCPUSet(0, 1),
	"c2": cpuset.NewCPUSet(2, 3, 4, 5),
	},
	},
	{
	description: "container with more cpus than is possible",
	defaultCPUset: cpuset.NewCPUSet(0, 1, 2, 3, 4, 5, 6, 7, 8),
	containers: map[string]cpuset.CPUSet{
	"c1": cpuset.NewCPUSet(0, 10),
	},
	},
	{
	description: "container without assigned cpus",
	defaultCPUset: cpuset.NewCPUSet(0, 1, 2, 3, 4, 5, 6, 7, 8),
	containers: map[string]cpuset.CPUSet{
	"c1": cpuset.NewCPUSet(),
	},
	},
	}

	for _, tc := range testCases {
	t.Run(tc.description, func(t *testing.T) {
	sfFile, err := ioutil.TempFile("/tmp", "testHelpersStateFile")
	defer os.Remove(sfFile.Name())
	if err != nil {
	t.Errorf("cannot create temporary test file: %q", err.Error())
	}

	state := NewFileState(sfFile.Name(), "static")
	state.SetDefaultCPUSet(tc.defaultCPUset)

	for containerName, containerCPUs := range tc.containers {
	state.SetCPUSet(containerName, containerCPUs)
	if cpus, _ := state.GetCPUSet(containerName); !cpus.Equals(containerCPUs) {
	t.Errorf("state is inconsistent. Wants = %q Have = %q", containerCPUs, cpus)
	}
	state.Delete(containerName)
	if cpus := state.GetCPUSetOrDefault(containerName); !cpus.Equals(tc.defaultCPUset) {
	t.Error("deleted container still existing in state")
	}

	}

	})
	}
	}

	func TestClearStateStateFile(t *testing.T) {
	testCases := []struct {
	description string
	defaultCPUset cpuset.CPUSet
	containers map[string]cpuset.CPUSet
	}{
	{
	description: "valid file",
	defaultCPUset: cpuset.NewCPUSet(0, 1, 2, 3, 4, 5, 6, 7, 8),
	containers: map[string]cpuset.CPUSet{
	"c1": cpuset.NewCPUSet(0, 1),
	"c2": cpuset.NewCPUSet(2, 3),
	"c3": cpuset.NewCPUSet(4, 5),
	},
	},
	}
	for _, testCase := range testCases {
	t.Run(testCase.description, func(t *testing.T) {
	sfFile, err := ioutil.TempFile("/tmp", "testHelpersStateFile")
	defer os.Remove(sfFile.Name())
	if err != nil {
	t.Errorf("cannot create temporary test file: %q", err.Error())
	}

	state := NewFileState(sfFile.Name(), "static")
	state.SetDefaultCPUSet(testCase.defaultCPUset)
	for containerName, containerCPUs := range testCase.containers {
	state.SetCPUSet(containerName, containerCPUs)
	}

	state.ClearState()
	if !cpuset.NewCPUSet().Equals(state.GetDefaultCPUSet()) {
	t.Error("cleared state shoudn't has got information about available cpuset")
	}
	for containerName := range testCase.containers {
	if !cpuset.NewCPUSet().Equals(state.GetCPUSetOrDefault(containerName)) {
	t.Error("cleared state shoudn't has got information about containers")
	}
	}
	})
	}
	}