mirror of
https://github.com/getcompanion-ai/computer-host.git
synced 2026-04-15 08:03:40 +00:00
e2f9e54970
* feat: host daemon api scaffold * fix: use sparse writes * fix: unix socket length (<108 bytes)
94 lines
2.5 KiB
Go
94 lines
2.5 KiB
Go
package daemon
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import (
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"bytes"
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"io"
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"os"
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"path/filepath"
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"syscall"
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"testing"
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)
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func TestCloneFilePreservesSparseDiskUsage(t *testing.T) {
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root := t.TempDir()
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sourcePath := filepath.Join(root, "source.img")
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targetPath := filepath.Join(root, "target.img")
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sourceFile, err := os.OpenFile(sourcePath, os.O_CREATE|os.O_TRUNC|os.O_WRONLY, 0o644)
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if err != nil {
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t.Fatalf("open source file: %v", err)
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}
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if _, err := sourceFile.Write([]byte("head")); err != nil {
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sourceFile.Close()
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t.Fatalf("write source prefix: %v", err)
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}
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if _, err := sourceFile.Seek(32<<20, io.SeekStart); err != nil {
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sourceFile.Close()
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t.Fatalf("seek source hole: %v", err)
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}
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if _, err := sourceFile.Write([]byte("tail")); err != nil {
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sourceFile.Close()
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t.Fatalf("write source suffix: %v", err)
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}
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if err := sourceFile.Close(); err != nil {
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t.Fatalf("close source file: %v", err)
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}
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sourceInfo, err := os.Stat(sourcePath)
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if err != nil {
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t.Fatalf("stat source file: %v", err)
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}
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sourceUsage, err := allocatedBytes(sourcePath)
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if err != nil {
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t.Fatalf("allocated bytes for source: %v", err)
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}
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if sourceUsage >= sourceInfo.Size()/2 {
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t.Skip("temp filesystem does not expose sparse allocation savings")
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}
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if err := cloneFile(sourcePath, targetPath); err != nil {
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t.Fatalf("clone sparse file: %v", err)
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}
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targetInfo, err := os.Stat(targetPath)
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if err != nil {
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t.Fatalf("stat target file: %v", err)
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}
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if targetInfo.Size() != sourceInfo.Size() {
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t.Fatalf("target size mismatch: got %d want %d", targetInfo.Size(), sourceInfo.Size())
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}
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targetUsage, err := allocatedBytes(targetPath)
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if err != nil {
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t.Fatalf("allocated bytes for target: %v", err)
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}
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if targetUsage >= targetInfo.Size()/2 {
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t.Fatalf("target file is not sparse enough: allocated=%d size=%d", targetUsage, targetInfo.Size())
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}
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targetData, err := os.ReadFile(targetPath)
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if err != nil {
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t.Fatalf("read target file: %v", err)
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}
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if !bytes.Equal(targetData[:4], []byte("head")) {
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t.Fatalf("target prefix mismatch: %q", string(targetData[:4]))
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}
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if !bytes.Equal(targetData[len(targetData)-4:], []byte("tail")) {
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t.Fatalf("target suffix mismatch: %q", string(targetData[len(targetData)-4:]))
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}
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if !bytes.Equal(targetData[4:4+(1<<20)], make([]byte, 1<<20)) {
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t.Fatal("target hole contents were not zeroed")
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}
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}
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func allocatedBytes(path string) (int64, error) {
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info, err := os.Stat(path)
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if err != nil {
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return 0, err
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}
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stat, ok := info.Sys().(*syscall.Stat_t)
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if !ok {
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return 0, syscall.EINVAL
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}
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return stat.Blocks * 512, nil
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}
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