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package furgit
import (
"bytes"
"fmt"
"os"
"path/filepath"
"strings"
"testing"
)
func TestPackfileRead(t *testing.T) {
repoPath, cleanup := setupTestRepo(t)
defer cleanup()
gitCmd(t, repoPath, "config", "gc.auto", "0")
workDir, cleanupWork := setupWorkDir(t)
defer cleanupWork()
err := os.WriteFile(filepath.Join(workDir, "file1.txt"), []byte("content1"), 0o644)
if err != nil {
t.Fatalf("failed to write file1.txt: %v", err)
}
err = os.WriteFile(filepath.Join(workDir, "file2.txt"), []byte("content2"), 0o644)
if err != nil {
t.Fatalf("failed to write file2.txt: %v", err)
}
gitCmd(t, repoPath, "--work-tree="+workDir, "add", ".")
gitCmd(t, repoPath, "--work-tree="+workDir, "commit", "-m", "Test commit")
commitHash := gitCmd(t, repoPath, "rev-parse", "HEAD")
gitCmd(t, repoPath, "repack", "-a", "-d")
repo, err := OpenRepository(repoPath)
if err != nil {
t.Fatalf("OpenRepository failed: %v", err)
}
defer func() { _ = repo.Close() }()
hashObj, _ := repo.ParseHash(commitHash)
obj, err := repo.ReadObject(hashObj)
if err != nil {
t.Fatalf("ReadObject from pack failed: %v", err)
}
commit, ok := obj.(*StoredCommit)
if !ok {
t.Fatalf("expected *StoredCommit, got %T", obj)
}
treeObj, err := repo.ReadObject(commit.Tree)
if err != nil {
t.Fatalf("ReadObject tree failed: %v", err)
}
tree, ok := treeObj.(*StoredTree)
if !ok {
t.Fatalf("expected *StoredTree, got %T", treeObj)
}
if len(tree.Entries) != 2 {
t.Errorf("tree entries: got %d, want 2", len(tree.Entries))
}
gitLsTree := gitCmd(t, repoPath, "ls-tree", commit.Tree.String())
for _, entry := range tree.Entries {
if !strings.Contains(gitLsTree, string(entry.Name)) {
t.Errorf("git ls-tree doesn't contain %s", entry.Name)
}
}
}
func TestPackfileLarge(t *testing.T) {
if testing.Short() {
t.Skip("skipping large packfile test in short mode")
}
repoPath, cleanup := setupTestRepo(t)
defer cleanup()
gitCmd(t, repoPath, "config", "gc.auto", "0")
workDir, cleanupWork := setupWorkDir(t)
defer cleanupWork()
numFiles := 1000
for i := 0; i < numFiles; i++ {
filename := filepath.Join(workDir, fmt.Sprintf("file%04d.txt", i))
content := fmt.Sprintf("Content for file %d\n", i)
err := os.WriteFile(filename, []byte(content), 0o644)
if err != nil {
t.Fatalf("failed to write %s: %v", filename, err)
}
}
gitCmd(t, repoPath, "--work-tree="+workDir, "add", ".")
gitCmd(t, repoPath, "--work-tree="+workDir, "commit", "-m", "Large commit")
commitHash := gitCmd(t, repoPath, "rev-parse", "HEAD")
gitCmd(t, repoPath, "repack", "-a", "-d")
repo, err := OpenRepository(repoPath)
if err != nil {
t.Fatalf("OpenRepository failed: %v", err)
}
defer func() { _ = repo.Close() }()
hashObj, _ := repo.ParseHash(commitHash)
obj, _ := repo.ReadObject(hashObj)
commit := obj.(*StoredCommit)
treeObj, _ := repo.ReadObject(commit.Tree)
tree := treeObj.(*StoredTree)
if len(tree.Entries) != numFiles {
t.Errorf("tree entries: got %d, want %d", len(tree.Entries), numFiles)
}
gitCount := gitCmd(t, repoPath, "ls-tree", commit.Tree.String())
gitLines := strings.Count(gitCount, "\n") + 1
if len(tree.Entries) != gitLines {
t.Errorf("furgit found %d entries, git found %d", len(tree.Entries), gitLines)
}
for i := 0; i < 10; i++ {
idx := i * (numFiles / 10)
expectedName := fmt.Sprintf("file%04d.txt", idx)
entry := tree.Entry([]byte(expectedName))
if entry == nil {
t.Errorf("expected to find entry %s", expectedName)
continue
}
blobObj, _ := repo.ReadObject(entry.ID)
blob := blobObj.(*StoredBlob)
expectedContent := fmt.Sprintf("Content for file %d\n", idx)
if string(blob.Data) != expectedContent {
t.Errorf("blob %s: got %q, want %q", expectedName, blob.Data, expectedContent)
}
gitData := gitCatFile(t, repoPath, "blob", entry.ID.String())
if !bytes.Equal(blob.Data, gitData) {
t.Errorf("blob %s: furgit data doesn't match git data", expectedName)
}
}
}
func TestMultiPackIndex(t *testing.T) {
if testing.Short() {
t.Skip("skipping multi-pack-index test in short mode")
}
repoPath, cleanup := setupTestRepo(t)
defer cleanup()
gitCmd(t, repoPath, "config", "gc.auto", "0")
workDir, cleanupWork := setupWorkDir(t)
defer cleanupWork()
err := os.WriteFile(filepath.Join(workDir, "file1.txt"), []byte("content1"), 0o644)
if err != nil {
t.Fatalf("failed to write file1.txt: %v", err)
}
gitCmd(t, repoPath, "--work-tree="+workDir, "add", ".")
gitCmd(t, repoPath, "--work-tree="+workDir, "commit", "-m", "Commit 1")
commit1Hash := gitCmd(t, repoPath, "rev-parse", "HEAD")
gitCmd(t, repoPath, "repack", "-d")
err = os.WriteFile(filepath.Join(workDir, "file2.txt"), []byte("content2"), 0o644)
if err != nil {
t.Fatalf("failed to write file2.txt: %v", err)
}
gitCmd(t, repoPath, "--work-tree="+workDir, "add", ".")
gitCmd(t, repoPath, "--work-tree="+workDir, "commit", "-m", "Commit 2")
commit2Hash := gitCmd(t, repoPath, "rev-parse", "HEAD")
gitCmd(t, repoPath, "repack", "-d")
gitCmd(t, repoPath, "repack", "--write-midx")
midxPath := filepath.Join(repoPath, "objects", "pack", "multi-pack-index")
if _, err := os.Stat(midxPath); os.IsNotExist(err) {
t.Fatalf("multi-pack-index file does not exist at %s", midxPath)
}
repo, err := OpenRepository(repoPath)
if err != nil {
t.Fatalf("OpenRepository failed: %v", err)
}
defer func() { _ = repo.Close() }()
hash1, _ := repo.ParseHash(commit1Hash)
obj1, err := repo.ReadObject(hash1)
if err != nil {
t.Fatalf("ReadObject commit1 failed: %v", err)
}
commit1 := obj1.(*StoredCommit)
if commit1.Hash() != hash1 {
t.Error("commit1 hash mismatch")
}
if !bytes.Contains(commit1.Message, []byte("Commit 1")) {
t.Errorf("commit1 message doesn't contain 'Commit 1': got %q", commit1.Message)
}
hash2, _ := repo.ParseHash(commit2Hash)
obj2, err := repo.ReadObject(hash2)
if err != nil {
t.Fatalf("ReadObject commit2 failed: %v", err)
}
commit2 := obj2.(*StoredCommit)
if commit2.Hash() != hash2 {
t.Error("commit2 hash mismatch")
}
if !bytes.Contains(commit2.Message, []byte("Commit 2")) {
t.Errorf("commit2 message doesn't contain 'Commit 2': got %q", commit2.Message)
}
}
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