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package afero
import (
"os"
"path/filepath"
"strings"
"testing"
)
func TestSymlinkIfPossible(t *testing.T) {
wd, _ := os.Getwd()
defer func() {
os.Chdir(wd)
}()
osFs := &OsFs{}
workDir, err := TempDir(osFs, "", "afero-symlink")
if err != nil {
t.Fatal(err)
}
defer func() {
osFs.RemoveAll(workDir)
}()
memWorkDir := "/sym"
memFs := NewMemMapFs()
overlayFs1 := &CopyOnWriteFs{base: osFs, layer: memFs}
overlayFs2 := &CopyOnWriteFs{base: memFs, layer: osFs}
overlayFsMemOnly := &CopyOnWriteFs{base: memFs, layer: NewMemMapFs()}
basePathFs := &BasePathFs{source: osFs, path: workDir}
basePathFsMem := &BasePathFs{source: memFs, path: memWorkDir}
roFs := &ReadOnlyFs{source: osFs}
roFsMem := &ReadOnlyFs{source: memFs}
pathFileMem := filepath.Join(memWorkDir, "aferom.txt")
osPath := filepath.Join(workDir, "afero.txt")
WriteFile(osFs, osPath, []byte("Hi, Afero!"), 0o777)
WriteFile(memFs, filepath.Join(pathFileMem), []byte("Hi, Afero!"), 0o777)
testLink := func(l Linker, source, destination string, output *string) {
if fs, ok := l.(Fs); ok {
dir := filepath.Dir(destination)
if dir != "" {
fs.MkdirAll(dir, 0o777)
}
}
err := l.SymlinkIfPossible(source, destination)
if (err == nil) && (output != nil) {
t.Fatalf("Error creating symlink, succeeded when expecting error %v", *output)
} else if (err != nil) && (output == nil) {
t.Fatalf("Error creating symlink, expected success, got %v", err)
} else if err != nil && err.Error() != *output && !strings.HasSuffix(err.Error(), *output) {
t.Fatalf("Error creating symlink, expected error '%v', instead got output '%v'", *output, err)
} else {
// test passed, if expecting a successful link, check the link with lstat if able
if output == nil {
if lst, ok := l.(Lstater); ok {
_, ok, err := lst.LstatIfPossible(destination)
if !ok {
if err != nil {
t.Fatalf("Error calling lstat on file after successful link, got: %v", err)
} else {
t.Fatalf("Error calling lstat on file after successful link, result didn't use lstat (not link)")
}
return
}
}
}
}
}
notSupported := ErrNoSymlink.Error()
testLink(osFs, osPath, filepath.Join(workDir, "os/link.txt"), nil)
testLink(overlayFs1, osPath, filepath.Join(workDir, "overlay/link1.txt"), ¬Supported)
testLink(overlayFs2, pathFileMem, filepath.Join(workDir, "overlay2/link2.txt"), nil)
testLink(
overlayFsMemOnly,
pathFileMem,
filepath.Join(memWorkDir, "overlay3/link.txt"),
¬Supported,
)
testLink(basePathFs, "afero.txt", "basepath/link.txt", nil)
testLink(basePathFsMem, pathFileMem, "link/file.txt", ¬Supported)
testLink(roFs, osPath, filepath.Join(workDir, "ro/link.txt"), ¬Supported)
testLink(roFsMem, pathFileMem, filepath.Join(memWorkDir, "ro/link.txt"), ¬Supported)
}
func TestReadlinkIfPossible(t *testing.T) {
wd, _ := os.Getwd()
defer func() {
os.Chdir(wd)
}()
osFs := &OsFs{}
workDir, err := TempDir(osFs, "", "afero-readlink")
if err != nil {
t.Fatal(err)
}
defer func() {
osFs.RemoveAll(workDir)
}()
memWorkDir := "/read"
memFs := NewMemMapFs()
overlayFs1 := &CopyOnWriteFs{base: osFs, layer: memFs}
overlayFs2 := &CopyOnWriteFs{base: memFs, layer: osFs}
overlayFsMemOnly := &CopyOnWriteFs{base: memFs, layer: NewMemMapFs()}
basePathFs := &BasePathFs{source: osFs, path: workDir}
basePathFsMem := &BasePathFs{source: memFs, path: memWorkDir}
roFs := &ReadOnlyFs{source: osFs}
roFsMem := &ReadOnlyFs{source: memFs}
pathFileMem := filepath.Join(memWorkDir, "aferom.txt")
osPath := filepath.Join(workDir, "afero.txt")
WriteFile(osFs, osPath, []byte("Hi, Afero!"), 0o777)
WriteFile(memFs, filepath.Join(pathFileMem), []byte("Hi, Afero!"), 0o777)
createLink := func(l Linker, source, destination string) error {
if fs, ok := l.(Fs); ok {
dir := filepath.Dir(destination)
if dir != "" {
fs.MkdirAll(dir, 0o777)
}
}
return l.SymlinkIfPossible(source, destination)
}
testRead := func(r LinkReader, name string, output *string) {
_, err := r.ReadlinkIfPossible(name)
if (err != nil) && (output == nil) {
t.Fatalf("Error reading link, expected success, got error: %v", err)
} else if (err == nil) && (output != nil) {
t.Fatalf("Error reading link, succeeded when expecting error: %v", *output)
} else if err != nil && err.Error() != *output && !strings.HasSuffix(err.Error(), *output) {
t.Fatalf("Error reading link, expected error '%v', instead received '%v'", *output, err)
}
}
notSupported := ErrNoReadlink.Error()
err = createLink(osFs, osPath, filepath.Join(workDir, "os/link.txt"))
if err != nil {
t.Fatal("Error creating test link: ", err)
}
testRead(osFs, filepath.Join(workDir, "os/link.txt"), nil)
testRead(overlayFs1, filepath.Join(workDir, "os/link.txt"), nil)
testRead(overlayFs2, filepath.Join(workDir, "os/link.txt"), nil)
testRead(overlayFsMemOnly, pathFileMem, ¬Supported)
testRead(basePathFs, "os/link.txt", nil)
testRead(basePathFsMem, pathFileMem, ¬Supported)
testRead(roFs, filepath.Join(workDir, "os/link.txt"), nil)
testRead(roFsMem, pathFileMem, ¬Supported)
}
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