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package fileutils // import "github.com/docker/docker/pkg/fileutils"
import (
"errors"
"os"
"path"
"path/filepath"
"runtime"
"strings"
"testing"
)
// CopyFile with invalid src
func TestCopyFileWithInvalidSrc(t *testing.T) {
tempDir := t.TempDir()
bytes, err := CopyFile(filepath.Join(tempDir, "/invalid/file/path"), path.Join(t.TempDir(), "dest"))
if err == nil {
t.Error("Should have fail to copy an invalid src file")
}
if !errors.Is(err, os.ErrNotExist) {
t.Errorf("Expected an os.ErrNotExist, got: %v", err)
}
if bytes != 0 {
t.Errorf("Should have written 0 bytes, got: %d", bytes)
}
}
// CopyFile with invalid dest
func TestCopyFileWithInvalidDest(t *testing.T) {
tempFolder := t.TempDir()
src := path.Join(tempFolder, "file")
err := os.WriteFile(src, []byte("content"), 0o740)
if err != nil {
t.Fatal(err)
}
bytes, err := CopyFile(src, path.Join(tempFolder, "/invalid/dest/path"))
if err == nil {
t.Error("Should have fail to copy an invalid src file")
}
if !errors.Is(err, os.ErrNotExist) {
t.Errorf("Expected an os.ErrNotExist, got: %v", err)
}
if bytes != 0 {
t.Errorf("Should have written 0 bytes, got: %d", bytes)
}
}
// CopyFile with same src and dest
func TestCopyFileWithSameSrcAndDest(t *testing.T) {
file := path.Join(t.TempDir(), "file")
err := os.WriteFile(file, []byte("content"), 0o740)
if err != nil {
t.Fatal(err)
}
bytes, err := CopyFile(file, file)
if err != nil {
t.Fatal(err)
}
if bytes != 0 {
t.Fatal("Should have written 0 bytes as it is the same file.")
}
}
// CopyFile with same src and dest but path is different and not clean
func TestCopyFileWithSameSrcAndDestWithPathNameDifferent(t *testing.T) {
testFolder := path.Join(t.TempDir(), "test")
err := os.Mkdir(testFolder, 0o740)
if err != nil {
t.Fatal(err)
}
file := path.Join(testFolder, "file")
sameFile := testFolder + "/../test/file"
err = os.WriteFile(file, []byte("content"), 0o740)
if err != nil {
t.Fatal(err)
}
bytes, err := CopyFile(file, sameFile)
if err != nil {
t.Fatal(err)
}
if bytes != 0 {
t.Fatal("Should have written 0 bytes as it is the same file.")
}
}
func TestCopyFile(t *testing.T) {
tempFolder := t.TempDir()
src := path.Join(tempFolder, "src")
dest := path.Join(tempFolder, "dest")
err := os.WriteFile(src, []byte("content"), 0o777)
if err != nil {
t.Error(err)
}
err = os.WriteFile(dest, []byte("destContent"), 0o777)
if err != nil {
t.Error(err)
}
bytes, err := CopyFile(src, dest)
if err != nil {
t.Fatal(err)
}
if bytes != 7 {
t.Fatalf("Should have written %d bytes but wrote %d", 7, bytes)
}
actual, err := os.ReadFile(dest)
if err != nil {
t.Fatal(err)
}
if string(actual) != "content" {
t.Fatalf("Dest content was '%s', expected '%s'", string(actual), "content")
}
}
// Reading a symlink to a directory must return the directory
func TestReadSymlinkedDirectoryExistingDirectory(t *testing.T) {
// TODO Windows: Port this test
if runtime.GOOS == "windows" {
t.Skip("Needs porting to Windows")
}
// On macOS, tmp itself is symlinked, so resolve this one upfront;
// see https://github.com/golang/go/issues/56259
tmpDir, err := filepath.EvalSymlinks(t.TempDir())
if err != nil {
t.Fatal(err)
}
srcPath := filepath.Join(tmpDir, "/testReadSymlinkToExistingDirectory")
dstPath := filepath.Join(tmpDir, "/dirLinkTest")
if err = os.Mkdir(srcPath, 0o777); err != nil {
t.Errorf("failed to create directory: %s", err)
}
if err = os.Symlink(srcPath, dstPath); err != nil {
t.Errorf("failed to create symlink: %s", err)
}
var symlinkedPath string
if symlinkedPath, err = ReadSymlinkedDirectory(dstPath); err != nil {
t.Fatalf("failed to read symlink to directory: %s", err)
}
if symlinkedPath != srcPath {
t.Fatalf("symlink returned unexpected directory: %s", symlinkedPath)
}
if err = os.Remove(srcPath); err != nil {
t.Errorf("failed to remove temporary directory: %s", err)
}
if err = os.Remove(dstPath); err != nil {
t.Errorf("failed to remove symlink: %s", err)
}
}
// Reading a non-existing symlink must fail
func TestReadSymlinkedDirectoryNonExistingSymlink(t *testing.T) {
tmpDir := t.TempDir()
symLinkedPath, err := ReadSymlinkedDirectory(path.Join(tmpDir, "/Non/ExistingPath"))
if err == nil {
t.Errorf("error expected for non-existing symlink")
}
if !errors.Is(err, os.ErrNotExist) {
t.Errorf("Expected an os.ErrNotExist, got: %v", err)
}
if symLinkedPath != "" {
t.Fatalf("expected empty path, but '%s' was returned", symLinkedPath)
}
}
// Reading a symlink to a file must fail
func TestReadSymlinkedDirectoryToFile(t *testing.T) {
// TODO Windows: Port this test
if runtime.GOOS == "windows" {
t.Skip("Needs porting to Windows")
}
var err error
var file *os.File
// #nosec G303
if file, err = os.Create("/tmp/testReadSymlinkToFile"); err != nil {
t.Fatalf("failed to create file: %s", err)
}
_ = file.Close()
if err = os.Symlink("/tmp/testReadSymlinkToFile", "/tmp/fileLinkTest"); err != nil {
t.Errorf("failed to create symlink: %s", err)
}
symlinkedPath, err := ReadSymlinkedDirectory("/tmp/fileLinkTest")
if err == nil {
t.Errorf("ReadSymlinkedDirectory on a symlink to a file should've failed")
}
if !strings.HasPrefix(err.Error(), "canonical path points to a file") {
t.Errorf("unexpected error: %v", err)
}
if symlinkedPath != "" {
t.Errorf("path should've been empty: %s", symlinkedPath)
}
if err = os.Remove("/tmp/testReadSymlinkToFile"); err != nil {
t.Errorf("failed to remove file: %s", err)
}
if err = os.Remove("/tmp/fileLinkTest"); err != nil {
t.Errorf("failed to remove symlink: %s", err)
}
}
func TestCreateIfNotExistsDir(t *testing.T) {
folderToCreate := filepath.Join(t.TempDir(), "tocreate")
if err := CreateIfNotExists(folderToCreate, true); err != nil {
t.Fatal(err)
}
fileinfo, err := os.Stat(folderToCreate)
if err != nil {
t.Fatalf("Should have create a folder, got %v", err)
}
if !fileinfo.IsDir() {
t.Errorf("Should have been a dir, seems it's not")
}
}
func TestCreateIfNotExistsFile(t *testing.T) {
fileToCreate := filepath.Join(t.TempDir(), "file/to/create")
if err := CreateIfNotExists(fileToCreate, false); err != nil {
t.Error(err)
}
fileinfo, err := os.Stat(fileToCreate)
if err != nil {
t.Fatalf("Should have create a file, got %v", err)
}
if fileinfo.IsDir() {
t.Errorf("Should have been a file, seems it's not")
}
}
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