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// Copyright 2020 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 fs_test
import (
"errors"
. "io/fs"
"os"
"testing"
"testing/fstest"
"time"
)
type readDirOnly struct{ ReadDirFS }
func (readDirOnly) Open(name string) (File, error) { return nil, ErrNotExist }
func TestReadDir(t *testing.T) {
check := func(desc string, dirs []DirEntry, err error) {
t.Helper()
if err != nil || len(dirs) != 2 || dirs[0].Name() != "hello.txt" || dirs[1].Name() != "sub" {
var names []string
for _, d := range dirs {
names = append(names, d.Name())
}
t.Errorf("ReadDir(%s) = %v, %v, want %v, nil", desc, names, err, []string{"hello.txt", "sub"})
}
}
// Test that ReadDir uses the method when present.
dirs, err := ReadDir(readDirOnly{testFsys}, ".")
check("readDirOnly", dirs, err)
// Test that ReadDir uses Open when the method is not present.
dirs, err = ReadDir(openOnly{testFsys}, ".")
check("openOnly", dirs, err)
// Test that ReadDir on Sub of . works (sub_test checks non-trivial subs).
sub, err := Sub(testFsys, ".")
if err != nil {
t.Fatal(err)
}
dirs, err = ReadDir(sub, ".")
check("sub(.)", dirs, err)
}
func TestFileInfoToDirEntry(t *testing.T) {
testFs := fstest.MapFS{
"notadir.txt": {
Data: []byte("hello, world"),
Mode: 0,
ModTime: time.Now(),
Sys: &sysValue,
},
"adir": {
Data: nil,
Mode: os.ModeDir,
ModTime: time.Now(),
Sys: &sysValue,
},
}
tests := []struct {
path string
wantMode FileMode
wantDir bool
}{
{path: "notadir.txt", wantMode: 0, wantDir: false},
{path: "adir", wantMode: os.ModeDir, wantDir: true},
}
for _, test := range tests {
test := test
t.Run(test.path, func(t *testing.T) {
fi, err := Stat(testFs, test.path)
if err != nil {
t.Fatal(err)
}
dirEntry := FileInfoToDirEntry(fi)
if g, w := dirEntry.Type(), test.wantMode; g != w {
t.Errorf("FileMode mismatch: got=%v, want=%v", g, w)
}
if g, w := dirEntry.Name(), test.path; g != w {
t.Errorf("Name mismatch: got=%v, want=%v", g, w)
}
if g, w := dirEntry.IsDir(), test.wantDir; g != w {
t.Errorf("IsDir mismatch: got=%v, want=%v", g, w)
}
})
}
}
func errorPath(err error) string {
var perr *PathError
if !errors.As(err, &perr) {
return ""
}
return perr.Path
}
func TestReadDirPath(t *testing.T) {
fsys := os.DirFS(t.TempDir())
_, err1 := ReadDir(fsys, "non-existent")
_, err2 := ReadDir(struct{ FS }{fsys}, "non-existent")
if s1, s2 := errorPath(err1), errorPath(err2); s1 != s2 {
t.Fatalf("s1: %s != s2: %s", s1, s2)
}
}