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// Copyright 2022 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package safefilepath_test
import (
"internal/safefilepath"
"os"
"path/filepath"
"runtime"
"testing"
)
type PathTest struct {
path, result string
}
const invalid = ""
var fspathtests = []PathTest{
{".", "."},
{"/a/b/c", "/a/b/c"},
{"a\x00b", invalid},
}
var winreservedpathtests = []PathTest{
{`a\b`, `a\b`},
{`a:b`, `a:b`},
{`a/b:c`, `a/b:c`},
{`NUL`, `NUL`},
{`./com1`, `./com1`},
{`a/nul/b`, `a/nul/b`},
}
// Whether a reserved name with an extension is reserved or not varies by
// Windows version.
var winreservedextpathtests = []PathTest{
{"nul.txt", "nul.txt"},
{"a/nul.txt/b", "a/nul.txt/b"},
}
var plan9reservedpathtests = []PathTest{
{`#c`, `#c`},
}
func TestFromFS(t *testing.T) {
switch runtime.GOOS {
case "windows":
if canWriteFile(t, "NUL") {
t.Errorf("can unexpectedly write a file named NUL on Windows")
}
if canWriteFile(t, "nul.txt") {
fspathtests = append(fspathtests, winreservedextpathtests...)
} else {
winreservedpathtests = append(winreservedpathtests, winreservedextpathtests...)
}
for i := range winreservedpathtests {
winreservedpathtests[i].result = invalid
}
for i := range fspathtests {
fspathtests[i].result = filepath.FromSlash(fspathtests[i].result)
}
case "plan9":
for i := range plan9reservedpathtests {
plan9reservedpathtests[i].result = invalid
}
}
tests := fspathtests
tests = append(tests, winreservedpathtests...)
tests = append(tests, plan9reservedpathtests...)
for _, test := range tests {
got, err := safefilepath.FromFS(test.path)
if (got == "") != (err != nil) {
t.Errorf(`FromFS(%q) = %q, %v; want "" only if err != nil`, test.path, got, err)
}
if got != test.result {
t.Errorf("FromFS(%q) = %q, %v; want %q", test.path, got, err, test.result)
}
}
}
func canWriteFile(t *testing.T, name string) bool {
path := filepath.Join(t.TempDir(), name)
os.WriteFile(path, []byte("ok"), 0666)
b, _ := os.ReadFile(path)
return string(b) == "ok"
}