157 lines
3.9 KiB
Go
157 lines
3.9 KiB
Go
package sys
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import (
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"io/fs"
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"os"
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"path"
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"runtime"
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"testing"
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"testing/fstest"
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"github.com/tetratelabs/wazero/internal/testing/require"
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)
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func Test_NewStat_t(t *testing.T) {
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tmpDir := t.TempDir()
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fileData := []byte{1, 2, 3, 4}
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dir := path.Join(tmpDir, "dir")
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require.NoError(t, os.Mkdir(dir, 0o700))
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osDirInfo, err := os.Stat(dir)
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require.NoError(t, err)
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file := path.Join(dir, "file")
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require.NoError(t, os.WriteFile(file, []byte{1, 2, 3, 4}, 0o400))
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osFileInfo, err := os.Stat(file)
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require.NoError(t, err)
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link := path.Join(dir, "file-link")
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require.NoError(t, os.Symlink(file, link))
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osSymlinkInfo, err := os.Lstat(link)
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require.NoError(t, err)
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osFileSt := NewStat_t(osFileInfo)
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testFS := fstest.MapFS{
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"dir": {
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Mode: osDirInfo.Mode(),
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ModTime: osDirInfo.ModTime(),
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},
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"dir/file": {
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Data: fileData,
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Mode: osFileInfo.Mode(),
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ModTime: osFileInfo.ModTime(),
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},
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"dir/file-sys": {
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// intentionally skip other fields to prove sys is read.
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Sys: &osFileSt,
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},
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}
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fsDirInfo, err := testFS.Stat("dir")
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require.NoError(t, err)
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fsFileInfo, err := testFS.Stat("dir/file")
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require.NoError(t, err)
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fsFileInfoWithSys, err := testFS.Stat("dir/file-sys")
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require.NoError(t, err)
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tests := []struct {
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name string
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info fs.FileInfo
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expectDevIno bool
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expectedMode fs.FileMode
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expectedSize int64
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expectAtimCtime bool
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}{
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{
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name: "os dir",
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info: osDirInfo,
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expectDevIno: true,
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expectedMode: fs.ModeDir | 0o0700,
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expectedSize: osDirInfo.Size(), // OS dependent
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expectAtimCtime: true,
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},
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{
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name: "fs dir",
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info: fsDirInfo,
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expectDevIno: false,
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expectedMode: fs.ModeDir | 0o0700,
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expectedSize: 0,
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expectAtimCtime: false,
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},
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{
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name: "os file",
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info: osFileInfo,
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expectDevIno: true,
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expectedMode: 0o0400,
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expectedSize: int64(len(fileData)),
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expectAtimCtime: true,
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},
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{
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name: "fs file",
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info: fsFileInfo,
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expectDevIno: false,
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expectedMode: 0o0400,
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expectedSize: int64(len(fileData)),
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expectAtimCtime: false,
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},
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{
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name: "fs file with Stat_t in Sys",
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info: fsFileInfoWithSys,
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expectDevIno: true,
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expectedMode: 0o0400,
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expectedSize: int64(len(fileData)),
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expectAtimCtime: true,
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},
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{
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name: "os symlink",
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info: osSymlinkInfo,
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expectDevIno: true,
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expectedMode: fs.ModeSymlink,
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expectedSize: osSymlinkInfo.Size(), // OS dependent
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expectAtimCtime: true,
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},
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}
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for _, tt := range tests {
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tc := tt
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t.Run(tc.name, func(t *testing.T) {
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st := NewStat_t(tc.info)
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if tc.expectDevIno && runtime.GOOS != "windows" {
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require.NotEqual(t, uint64(0), st.Dev)
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require.NotEqual(t, uint64(0), st.Ino)
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} else {
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require.Zero(t, st.Dev)
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require.Zero(t, st.Ino)
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}
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// link mode may differ on windows, so mask
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require.Equal(t, tc.expectedMode, st.Mode&tc.expectedMode)
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if sysParseable && runtime.GOOS != "windows" {
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switch st.Nlink {
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case 2, 4: // dirents may include dot entries.
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require.Equal(t, fs.ModeDir, st.Mode.Type())
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default:
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require.Equal(t, uint64(1), st.Nlink)
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}
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} else { // Nlink is possibly wrong, but not zero.
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require.Equal(t, uint64(1), st.Nlink)
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}
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require.Equal(t, tc.expectedSize, st.Size)
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if tc.expectAtimCtime && sysParseable {
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// We don't validate times strictly because it is os-dependent
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// what updates times. There are edge cases for symlinks, too.
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require.NotEqual(t, EpochNanos(0), st.Ctim)
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require.NotEqual(t, EpochNanos(0), st.Mtim)
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require.NotEqual(t, EpochNanos(0), st.Mtim)
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} else { // mtim is used for atim and ctime
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require.Equal(t, st.Mtim, st.Ctim)
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require.NotEqual(t, EpochNanos(0), st.Mtim)
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require.Equal(t, st.Mtim, st.Atim)
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}
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})
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}
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}
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