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fs_test.go
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fs_test.go
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package gofat
import (
"errors"
"fmt"
"io"
"math/rand"
"os"
"reflect"
"strings"
"sync"
"testing"
"testing/quick"
"time"
"github.com/spf13/afero"
)
const testFolderInImages = "DoNotEdit_tests"
const (
fat32 = "./testdata/fat32.img"
fat16 = "./testdata/fat16.img"
fat32InvalidSectorsPerCluster = "./testdata/fat32-invalid-sectors-per-cluster.img"
fat16InvalidFiles = "./testdata/fat16-invalid-files.img"
)
func testFileReader(file string) io.ReadSeeker {
fsFile, err := os.Open(file)
if err != nil {
fmt.Println("Make sure you ran go generate.")
panic(err)
}
return fsFile
}
func testingNew(t testing.TB, reader io.ReadSeeker) *Fs {
fs, err := New(reader)
if err != nil {
t.Error(err)
}
return fs
}
func TestNew(t *testing.T) {
type args struct {
reader io.ReadSeeker
}
tests := []struct {
name string
args args
// Do not expect something special. Should be enough to check for non-nil.
// Would not be that easy to provide a valid Fs to check with DeepEqual.
wantNotNil bool
wantErr bool
}{
{
name: "FAT32 test image",
args: args{
reader: testFileReader(fat32),
},
wantNotNil: true,
wantErr: false,
},
{
name: "FAT16 test image",
args: args{
reader: testFileReader(fat16),
},
wantNotNil: true,
wantErr: false,
},
{
name: "no FAT file",
args: args{
reader: strings.NewReader("This is no FAT file"),
},
wantNotNil: false,
wantErr: true,
},
{
name: "fat32 invalid sectors per cluster test image",
args: args{
reader: testFileReader(fat32InvalidSectorsPerCluster),
},
wantNotNil: false,
wantErr: true,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got, err := New(tt.args.reader)
if (err != nil) != tt.wantErr {
t.Errorf("New() error = %v, wantErr %v", err, tt.wantErr)
return
}
if (got != nil) != tt.wantNotNil {
t.Errorf("New() = %v, wantNotNil %v", got, tt.wantNotNil)
}
})
}
}
func TestNewSkipChecks(t *testing.T) {
type args struct {
reader io.ReadSeeker
}
tests := []struct {
name string
args args
wantNotNil bool
wantErr bool
}{
{
name: "FAT32 test image",
args: args{
reader: testFileReader(fat32),
},
wantNotNil: true,
wantErr: false,
},
{
name: "FAT16 test image",
args: args{
reader: testFileReader(fat16),
},
wantNotNil: true,
wantErr: false,
},
{
name: "no FAT file",
args: args{
reader: strings.NewReader("This is no FAT file"),
},
wantNotNil: false,
wantErr: true,
},
{
name: "fat32 invalid sectors per cluster test image",
args: args{
reader: testFileReader(fat32InvalidSectorsPerCluster),
},
wantNotNil: true,
wantErr: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
got, err := NewSkipChecks(tt.args.reader)
if (err != nil) != tt.wantErr {
t.Errorf("NewSkipChecks() error = %v, wantErr %v", err, tt.wantErr)
return
}
if (got != nil) != tt.wantNotNil {
t.Errorf("New() = %v, wantNotNil %v", got, tt.wantNotNil)
}
})
}
}
func Test_fatEntry_Value(t *testing.T) {
tests := []struct {
name string
e fatEntry
want uint32
}{
{
name: "a value",
e: 42,
want: 42,
},
{
name: "zero",
e: 0,
want: 0,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
if got := tt.e.Value(); got != tt.want {
t.Errorf("fatEntry.Value() = %v, want %v", got, tt.want)
}
})
}
}
// fatEntryTests contains the data for a fatEntry test case.
type fatEntryTests struct {
name string
eFrom fatEntry
eTo fatEntry
want bool
}
// testFatEntry executes the fatEntryTests using the given tests and execution method.
// It utilizes testing/quick to fuzz values in between of eFrom and eTo. The edge-values are always tested.
func testFatEntry(t *testing.T, tests []fatEntryTests, method string, execute func(e fatEntry) bool) {
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
// First test the edge cases.
if got := execute(tt.eFrom); got != tt.want {
t.Errorf("fatEntry(0x%x).%v() = %v, want %v", tt.eFrom, method, got, tt.want)
}
if got := execute(tt.eTo); got != tt.want {
t.Errorf("fatEntry(0x%x).%v() = %v, want %v", tt.eTo, method, got, tt.want)
}
})
// If the values are too near, random tests make no sense.
if tt.eFrom == tt.eTo || tt.eTo-tt.eFrom <= 2 {
return
}
t.Run("Random: "+tt.name, func(t *testing.T) {
// Then test some values in between using random values.
// maxCount is either eTo - eFrom or 10 if too big.
// That way only max 100 values get tested.
// This applies only to the default value of "-quickchecks".
// If a higher value than "-quickchecks 100" is used,
// more values than maxCount may be tested.
maxCount := int(tt.eTo - tt.eFrom)
if maxCount > 100 {
maxCount = 100
}
// Utilize quick.Check to randomize the test.
if err := quick.Check(func(entry fatEntry) bool {
return tt.want == execute(entry)
}, &quick.Config{
MaxCountScale: float64(maxCount) / 100,
Values: func(values []reflect.Value, rand *rand.Rand) {
// Generate a random fatEntry in the current value range.
var min = int(tt.eFrom + 1)
var max = int(tt.eTo)
for i := range values {
values[i] = reflect.ValueOf(fatEntry(uint32(rand.Intn(max-min) + min)))
}
},
}); err != nil {
t.Errorf("fatEntry(RANDOM_VALUE).%v() failed:\n%v", method, err)
}
})
}
}
func Test_fatEntry_IsFree(t *testing.T) {
testFatEntry(t, []fatEntryTests{
{
name: "IsFree",
eFrom: 0x00000000,
eTo: 0x00000000,
want: true,
},
{
name: "not IsFree",
eFrom: 0x00000001,
eTo: 0x0FFFFFFF,
want: false,
},
{
name: "IsFree with most significant byte set (special bits which should be ignored)",
eFrom: 0xF0000000,
eTo: 0xF0000000,
want: true,
},
}, "IsFree", func(e fatEntry) bool {
return e.IsFree()
})
}
func Test_fatEntry_IsReservedTemp(t *testing.T) {
testFatEntry(t, []fatEntryTests{
{
name: "IsReservedTemp",
eFrom: 0x00000001,
eTo: 0x00000001,
want: true,
},
{
name: "higher than IsReservedTemp",
eFrom: 0x00000002,
eTo: 0x0FFFFFFF,
want: false,
},
{
name: "lower than IsReservedTemp",
eFrom: 0x00000000,
eTo: 0x00000000,
want: false,
},
{
name: "IsReservedTemp with most significant byte set (special bits which should be ignored)",
eFrom: 0xF0000001,
eTo: 0xF0000001,
want: true,
},
}, "IsReservedTemp", func(e fatEntry) bool {
return e.IsReservedTemp()
})
}
func Test_fatEntry_IsNextCluster(t *testing.T) {
testFatEntry(t, []fatEntryTests{
{
name: "IsNextCluster",
eFrom: 0x00000002,
eTo: 0x0FFFFFEF,
want: true,
},
{
name: "higher than IsNextCluster",
eFrom: 0x0FFFFFF0,
eTo: 0x0FFFFFFF,
want: false,
},
{
name: "lower than IsNextCluster",
eFrom: 0x00000000,
eTo: 0x00000001,
want: false,
},
{
name: "IsNextCluster with most significant byte set (special bits which should be ignored)",
eFrom: 0xF0000002,
eTo: 0xF0000002,
want: true,
},
}, "IsNextCluster", func(e fatEntry) bool {
return e.IsNextCluster()
})
}
func Test_fatEntry_IsReservedSometimes(t *testing.T) {
testFatEntry(t, []fatEntryTests{
{
name: "IsReservedSometimes",
eFrom: 0x0FFFFFF0,
eTo: 0x0FFFFFF5,
want: true,
},
{
name: "higher than IsReservedSometimes",
eFrom: 0x0FFFFFF6,
eTo: 0x0FFFFFFF,
want: false,
},
{
name: "lower than IsReservedSometimes",
eFrom: 0x00000000,
eTo: 0x0FFFFFEF,
want: false,
},
{
name: "IsReservedSometimes with most significant byte set (special bits which should be ignored)",
eFrom: 0xFFFFFFF0,
eTo: 0xFFFFFFF0,
want: true,
},
}, "IsReservedSometimes", func(e fatEntry) bool {
return e.IsReservedSometimes()
})
}
func Test_fatEntry_IsReserved(t *testing.T) {
testFatEntry(t, []fatEntryTests{
{
name: "IsReserved",
eFrom: 0x0FFFFFF6,
eTo: 0x0FFFFFF6,
want: true,
},
{
name: "higher than IsReserved",
eFrom: 0x0FFFFFF7,
eTo: 0x0FFFFFFF,
want: false,
},
{
name: "lower than IsReserved",
eFrom: 0x00000000,
eTo: 0x0FFFFFF5,
want: false,
},
{
name: "IsReserved with most significant byte set (special bits which should be ignored)",
eFrom: 0xFFFFFFF6,
eTo: 0xFFFFFFF6,
want: true,
},
}, "IsReserved", func(e fatEntry) bool {
return e.IsReserved()
})
}
func Test_fatEntry_IsBad(t *testing.T) {
testFatEntry(t, []fatEntryTests{
{
name: "IsBad",
eFrom: 0x0FFFFFF7,
eTo: 0x0FFFFFF7,
want: true,
},
{
name: "higher than IsBad",
eFrom: 0x0FFFFFF8,
eTo: 0x0FFFFFFF,
want: false,
},
{
name: "lower than IsBad",
eFrom: 0x00000000,
eTo: 0x0FFFFFF6,
want: false,
},
{
name: "IsBad with most significant byte set (special bits which should be ignored)",
eFrom: 0xFFFFFFF7,
eTo: 0xFFFFFFF7,
want: true,
},
}, "IsBad", func(e fatEntry) bool {
return e.IsBad()
})
}
func Test_fatEntry_IsEOF(t *testing.T) {
testFatEntry(t, []fatEntryTests{
{
name: "IsEOF",
eFrom: 0x0FFFFFF8,
eTo: 0x0FFFFFFF,
want: true,
},
{
name: "lower than IsEOF",
eFrom: 0x00000000,
eTo: 0x0FFFFFF7,
want: false,
},
{
name: "IsEOF with most significant byte set (special bits which should be ignored)",
eFrom: 0xFFFFFFF8,
eTo: 0xFFFFFFF8,
want: true,
},
}, "IsEOF", func(e fatEntry) bool {
return e.IsEOF()
})
}
func Test_fatEntry_ReadAsNextCluster(t *testing.T) {
testFatEntry(t, []fatEntryTests{
{
name: "IsFree",
eFrom: 0x00000000,
eTo: 0x00000000,
want: false,
},
{
name: "IsReservedTemp",
eFrom: 0x00000001,
eTo: 0x00000001,
want: false,
},
{
name: "IsNextCluster",
eFrom: 0x00000002,
eTo: 0x0FFFFFEF,
want: true,
},
{
name: "IsReservedSometimes",
eFrom: 0x0FFFFFF0,
eTo: 0x0FFFFFF5,
want: true,
},
{
name: "IsReserved",
eFrom: 0x0FFFFFF6,
eTo: 0x0FFFFFF6,
want: true,
},
{
name: "IsBad",
eFrom: 0x0FFFFFF7,
eTo: 0x0FFFFFF7,
want: true,
},
{
name: "IsEOF",
eFrom: 0x0FFFFFF8,
eTo: 0x0FFFFFFF,
want: false,
},
}, "ReadAsNextCluster", func(e fatEntry) bool {
return e.ReadAsNextCluster()
})
}
func Test_fatEntry_ReadAsEOF(t *testing.T) {
testFatEntry(t, []fatEntryTests{
{
name: "IsFree",
eFrom: 0x00000000,
eTo: 0x00000000,
want: false,
},
{
name: "IsReservedTemp",
eFrom: 0x00000001,
eTo: 0x00000001,
want: true,
},
{
name: "IsNextCluster",
eFrom: 0x00000002,
eTo: 0x0FFFFFEF,
want: false,
},
{
name: "IsReservedSometimes",
eFrom: 0x0FFFFFF0,
eTo: 0x0FFFFFF5,
want: false,
},
{
name: "IsReserved",
eFrom: 0x0FFFFFF6,
eTo: 0x0FFFFFF6,
want: false,
},
{
name: "IsBad",
eFrom: 0x0FFFFFF7,
eTo: 0x0FFFFFF7,
want: false,
},
{
name: "IsEOF",
eFrom: 0x0FFFFFF8,
eTo: 0x0FFFFFFF,
want: true,
},
}, "ReadAsEOF", func(e fatEntry) bool {
return e.ReadAsEOF()
})
}
func TestFs_Label(t *testing.T) {
type fields struct {
reader io.ReadSeeker
info Info
sectorCache Sector
}
tests := []struct {
name string
fields fields
want string
}{
{
name: "a simple label",
fields: fields{
info: Info{
Label: "A super label",
},
},
want: "A super label",
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
fs := &Fs{
lock: sync.Mutex{},
reader: tt.fields.reader,
info: tt.fields.info,
sectorCache: tt.fields.sectorCache,
}
if got := fs.Label(); got != tt.want {
t.Errorf("Fs.Label() = %v, want %v", got, tt.want)
}
})
}
}
func TestFs_FSType(t *testing.T) {
type fields struct {
reader io.ReadSeeker
info Info
sectorCache Sector
}
tests := []struct {
name string
fields fields
want FATType
}{
{
name: "FAT12",
fields: fields{
info: Info{
FSType: FAT12,
},
},
want: FAT12,
},
{
name: "FAT16",
fields: fields{
info: Info{
FSType: FAT16,
},
},
want: FAT16,
},
{
name: "FAT32",
fields: fields{
info: Info{
FSType: FAT32,
},
},
want: FAT32,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
fs := &Fs{
lock: sync.Mutex{},
reader: tt.fields.reader,
info: tt.fields.info,
sectorCache: tt.fields.sectorCache,
}
if got := fs.FSType(); got != tt.want {
t.Errorf("Fs.FSType() = %v, want %v", got, tt.want)
}
})
}
}
func TestFs_Create(t *testing.T) {
type fields struct {
reader io.ReadSeeker
info Info
sectorCache Sector
}
type args struct {
name string
}
tests := []struct {
name string
fields fields
args args
want afero.File
wantErr bool
}{
// TODO: Add test cases.
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
fs := &Fs{
lock: sync.Mutex{},
reader: tt.fields.reader,
info: tt.fields.info,
sectorCache: tt.fields.sectorCache,
}
got, err := fs.Create(tt.args.name)
if (err != nil) != tt.wantErr {
t.Errorf("Fs.Create() error = %v, wantErr %v", err, tt.wantErr)
return
}
if !reflect.DeepEqual(got, tt.want) {
t.Errorf("Fs.Create() = %v, want %v", got, tt.want)
}
})
}
}
func TestFs_Mkdir(t *testing.T) {
type fields struct {
reader io.ReadSeeker
info Info
sectorCache Sector
}
type args struct {
name string
perm os.FileMode
}
tests := []struct {
name string
fields fields
args args
wantErr bool
}{
// TODO: Add test cases.
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
fs := &Fs{
lock: sync.Mutex{},
reader: tt.fields.reader,
info: tt.fields.info,
sectorCache: tt.fields.sectorCache,
}
if err := fs.Mkdir(tt.args.name, tt.args.perm); (err != nil) != tt.wantErr {
t.Errorf("Fs.Mkdir() error = %v, wantErr %v", err, tt.wantErr)
}
})
}
}
func TestFs_MkdirAll(t *testing.T) {
type fields struct {
reader io.ReadSeeker
info Info
sectorCache Sector
}
type args struct {
path string
perm os.FileMode
}
tests := []struct {
name string
fields fields
args args
wantErr bool
}{
// TODO: Add test cases.
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
fs := &Fs{
lock: sync.Mutex{},
reader: tt.fields.reader,
info: tt.fields.info,
sectorCache: tt.fields.sectorCache,
}
if err := fs.MkdirAll(tt.args.path, tt.args.perm); (err != nil) != tt.wantErr {
t.Errorf("Fs.MkdirAll() error = %v, wantErr %v", err, tt.wantErr)
}
})
}
}
func TestFs_Open(t *testing.T) {
fakeRootEntry := ExtendedEntryHeader{
EntryHeader: EntryHeader{
Name: [11]byte{' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' ', ' '},
Attribute: AttrDirectory,
},
}
fakeRootFile := File{
path: "",
isDirectory: true,
stat: fakeRootEntry.FileInfo(),
}
fakeFolderEntry := ExtendedEntryHeader{
ExtendedName: "DoNotEdit_tests",
EntryHeader: EntryHeader{
Name: [11]byte{68, 79, 78, 79, 84, 69, 126, 49, 32, 32, 32},
Attribute: AttrDirectory,
NTReserved: 0,
CreateTimeTenth: 122,
CreateTime: 39428,
CreateDate: 21043,
LastAccessDate: 21034,
FirstClusterHI: 0,
WriteTime: 39428,
WriteDate: 21043,
FirstClusterLO: 52,
FileSize: 0,
},
}
fakeFolderFile := File{
fs: nil,
path: "DoNotEdit_tests",
isDirectory: true,
isReadOnly: false,
isHidden: false,
isSystem: false,
firstCluster: 52,
stat: fakeFolderEntry.FileInfo(),
offset: 0,
}
fakeFileEntry := ExtendedEntryHeader{
ExtendedName: "README.md",
EntryHeader: EntryHeader{
Name: [11]byte{82, 69, 65, 68, 77, 69, 32, 32, 77, 68, 32},
Attribute: AttrArchive,
NTReserved: 0,
CreateTimeTenth: 122,
CreateTime: 39428,
CreateDate: 21043,
LastAccessDate: 21043,
FirstClusterHI: 0,
WriteTime: 41936,
WriteDate: 20890,
FirstClusterLO: 53,
FileSize: 10513,
},
}
fakeFile := File{
fs: nil,
path: "DoNotEdit_tests/README.md",
isDirectory: false,
isReadOnly: false,
isHidden: false,
isSystem: false,
firstCluster: 53,
stat: fakeFileEntry.FileInfo(),
offset: 0,
}
fakeFolderEntryFAT16 := ExtendedEntryHeader{
ExtendedName: "DoNotEdit_tests",
EntryHeader: EntryHeader{
Name: [11]byte{68, 79, 78, 79, 84, 69, 126, 49, 32, 32, 32},
Attribute: AttrDirectory,
NTReserved: 0,
CreateTimeTenth: 82,
CreateTime: 44897,
CreateDate: 21044,
LastAccessDate: 21044,
FirstClusterHI: 0,
WriteTime: 44897,
WriteDate: 21044,
FirstClusterLO: 4,
FileSize: 0,
},
}
fakeFolderFileFAT16 := File{
fs: nil,
path: "DoNotEdit_tests",
isDirectory: true,
isReadOnly: false,
isHidden: false,
isSystem: false,
firstCluster: 4,
stat: fakeFolderEntryFAT16.FileInfo(),
offset: 0,
}
fakeFileEntryFAT16 := ExtendedEntryHeader{
ExtendedName: "README.md",
EntryHeader: EntryHeader{
Name: [11]byte{82, 69, 65, 68, 77, 69, 32, 32, 77, 68, 32},
Attribute: AttrArchive,
NTReserved: 0,
CreateTimeTenth: 82,
CreateTime: 44897,
CreateDate: 21044,
LastAccessDate: 21069,
FirstClusterHI: 0,
WriteTime: 41936,
WriteDate: 20890,
FirstClusterLO: 6,
FileSize: 10513,
},
}
fakeFileFAT16 := File{
fs: nil,
path: "DoNotEdit_tests/README.md",
isDirectory: false,
isReadOnly: false,
isHidden: false,
isSystem: false,
firstCluster: 6,
stat: fakeFileEntryFAT16.FileInfo(),
offset: 0,
}
type args struct {
path string
}
tests := []struct {
name string
fs *Fs
args args
want *File
wantErr bool
}{
{
name: "root with '.'",
fs: testingNew(t, testFileReader(fat32)),
args: args{
path: ".",
},
want: &fakeRootFile,
wantErr: false,
},
{
name: "'/'",
fs: testingNew(t, testFileReader(fat32)),
args: args{
path: "/",
},
wantErr: true,
},
{
name: "folder",
fs: testingNew(t, testFileReader(fat32)),
args: args{
path: testFolderInImages,
},
want: &fakeFolderFile,
wantErr: false,
},
{
name: "not existing folder",
fs: testingNew(t, testFileReader(fat32)),
args: args{
path: "/non-existing-folder",
},
want: nil,
wantErr: true,
},
{
name: "file",
fs: testingNew(t, testFileReader(fat32)),
args: args{
path: testFolderInImages + "/README.md",
},
want: &fakeFile,
wantErr: false,
},
{
name: "FAT16 root with '.'",
fs: testingNew(t, testFileReader(fat16)),
args: args{
path: ".",
},
want: &fakeRootFile,
wantErr: false,
},
{
name: "FAT16 '/'",
fs: testingNew(t, testFileReader(fat16)),
args: args{
path: "/",
},
wantErr: true,
},
{
name: "FAT16 folder",
fs: testingNew(t, testFileReader(fat16)),
args: args{
path: testFolderInImages,
},
want: &fakeFolderFileFAT16,
wantErr: false,
},
{
name: "FAT16 not existing folder",
fs: testingNew(t, testFileReader(fat16)),
args: args{
path: "/non-existing-folder",
},
want: nil,
wantErr: true,
},
{
name: "FAT16 file",
fs: testingNew(t, testFileReader(fat16)),
args: args{
path: testFolderInImages + "/README.md",
},
want: &fakeFileFAT16,
wantErr: false,
},
}
for _, tt := range tests {
t.Run(tt.name, func(t *testing.T) {
// Set the fs.
if tt.want != nil {
tt.want.fs = tt.fs
}
got, err := tt.fs.Open(tt.args.path)
if (err != nil) != tt.wantErr {
t.Errorf("Fs.Open() error = %v, wantErr %v", err, tt.wantErr)
return
}
if tt.want == nil && got == nil {
// Deep equal seems to not work with nil here.
return
}
if !reflect.DeepEqual(got, tt.want) {
t.Errorf("Fs.Open() = %v, want %v", got, tt.want)
}
})
}
}
func TestFs_OpenFile(t *testing.T) {
type fields struct {
reader io.ReadSeeker