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package furgit
import (
"os"
"path/filepath"
"strings"
"testing"
)
func TestResolveRef(t *testing.T) {
repoPath, cleanup := setupTestRepo(t)
defer cleanup()
workDir, cleanupWork := setupWorkDir(t)
defer cleanupWork()
err := os.WriteFile(filepath.Join(workDir, "test.txt"), []byte("content"), 0o644)
if err != nil {
t.Fatalf("Failed to write test.txt: %v", err)
}
gitCmd(t, repoPath, "--work-tree="+workDir, "add", ".")
gitCmd(t, repoPath, "--work-tree="+workDir, "commit", "-m", "test")
commitHash := gitCmd(t, repoPath, "rev-parse", "HEAD")
gitCmd(t, repoPath, "update-ref", "refs/heads/main", commitHash)
repo, err := OpenRepository(repoPath)
if err != nil {
t.Fatalf("OpenRepository failed: %v", err)
}
defer func() { _ = repo.Close() }()
hashObj, _ := repo.ParseHash(commitHash)
resolved, err := repo.ResolveRef("refs/heads/main")
if err != nil {
t.Fatalf("ResolveRef failed: %v", err)
}
if resolved.Kind != RefKindDetached {
t.Fatalf("expected detached ref, got %v", resolved.Kind)
}
if resolved.Hash != hashObj {
t.Errorf("resolved hash: got %s, want %s", resolved.Hash, hashObj)
}
gitRevParse := gitCmd(t, repoPath, "rev-parse", "refs/heads/main")
if resolved.Hash.String() != gitRevParse {
t.Errorf("furgit resolved %s, git resolved %s", resolved.Hash, gitRevParse)
}
_, err = repo.ResolveRef("refs/heads/nonexistent")
if err == nil {
t.Error("expected error for nonexistent ref")
}
}
func TestResolveHEAD(t *testing.T) {
repoPath, cleanup := setupTestRepo(t)
defer cleanup()
workDir, cleanupWork := setupWorkDir(t)
defer cleanupWork()
err := os.WriteFile(filepath.Join(workDir, "test.txt"), []byte("content"), 0o644)
if err != nil {
t.Fatalf("failed to write test.txt: %v", err)
}
gitCmd(t, repoPath, "--work-tree="+workDir, "add", ".")
gitCmd(t, repoPath, "--work-tree="+workDir, "commit", "-m", "test")
commitHash := gitCmd(t, repoPath, "rev-parse", "HEAD")
gitCmd(t, repoPath, "update-ref", "refs/heads/main", commitHash)
gitCmd(t, repoPath, "symbolic-ref", "HEAD", "refs/heads/main")
repo, err := OpenRepository(repoPath)
if err != nil {
t.Fatalf("OpenRepository failed: %v", err)
}
defer func() { _ = repo.Close() }()
ref, err := repo.ResolveRef("HEAD")
if err != nil {
t.Fatalf("ResolveRef(HEAD) failed: %v", err)
}
if ref.Kind != RefKindSymbolic {
t.Fatalf("HEAD kind: got %v, want %v", ref.Kind, RefKindSymbolic)
}
if ref.Ref != "refs/heads/main" {
t.Errorf("HEAD symbolic ref: got %q, want %q", ref.Ref, "refs/heads/main")
}
gitSymRef := gitCmd(t, repoPath, "symbolic-ref", "HEAD")
if ref.Ref != gitSymRef {
t.Errorf("furgit resolved %v, git resolved %s", ref.Ref, gitSymRef)
}
}
func TestPackedRefs(t *testing.T) {
repoPath, cleanup := setupTestRepo(t)
defer cleanup()
workDir, cleanupWork := setupWorkDir(t)
defer cleanupWork()
err := os.WriteFile(filepath.Join(workDir, "test.txt"), []byte("content1"), 0o644)
if err != nil {
t.Fatalf("failed to write test.txt: %v", err)
}
gitCmd(t, repoPath, "--work-tree="+workDir, "add", ".")
gitCmd(t, repoPath, "--work-tree="+workDir, "commit", "-m", "commit1")
commit1Hash := gitCmd(t, repoPath, "rev-parse", "HEAD")
err = os.WriteFile(filepath.Join(workDir, "test2.txt"), []byte("content2"), 0o644)
if err != nil {
t.Fatalf("failed to write test2.txt: %v", err)
}
gitCmd(t, repoPath, "--work-tree="+workDir, "add", ".")
gitCmd(t, repoPath, "--work-tree="+workDir, "commit", "-m", "commit2")
commit2Hash := gitCmd(t, repoPath, "rev-parse", "HEAD")
gitCmd(t, repoPath, "update-ref", "refs/heads/branch1", commit1Hash)
gitCmd(t, repoPath, "update-ref", "refs/heads/branch2", commit2Hash)
gitCmd(t, repoPath, "update-ref", "refs/tags/v1.0", commit1Hash)
gitCmd(t, repoPath, "pack-refs", "--all")
repo, err := OpenRepository(repoPath)
if err != nil {
t.Fatalf("OpenRepository failed: %v", err)
}
defer func() { _ = repo.Close() }()
hash1, _ := repo.ParseHash(commit1Hash)
hash2, _ := repo.ParseHash(commit2Hash)
resolved1, err := repo.ResolveRef("refs/heads/branch1")
if err != nil {
t.Fatalf("ResolveRef branch1 failed: %v", err)
}
if resolved1.Kind != RefKindDetached || resolved1.Hash != hash1 {
t.Errorf("branch1: got %s, want %s", resolved1.Hash, hash1)
}
gitResolved1 := gitCmd(t, repoPath, "rev-parse", "refs/heads/branch1")
if resolved1.Hash.String() != gitResolved1 {
t.Errorf("furgit resolved %s, git resolved %s", resolved1.Hash, gitResolved1)
}
resolved2, err := repo.ResolveRef("refs/heads/branch2")
if err != nil {
t.Fatalf("ResolveRef branch2 failed: %v", err)
}
if resolved2.Kind != RefKindDetached || resolved2.Hash != hash2 {
t.Errorf("branch2: got %s, want %s", resolved2.Hash, hash2)
}
resolvedTag, err := repo.ResolveRef("refs/tags/v1.0")
if err != nil {
t.Fatalf("ResolveRef tag failed: %v", err)
}
if resolvedTag.Kind != RefKindDetached || resolvedTag.Hash != hash1 {
t.Errorf("tag: got %s, want %s", resolvedTag.Hash, hash1)
}
}
func TestResolveRefFully(t *testing.T) {
repoPath, cleanup := setupTestRepo(t)
defer cleanup()
workDir, cleanupWork := setupWorkDir(t)
defer cleanupWork()
// Create an initial commit
err := os.WriteFile(filepath.Join(workDir, "file.txt"), []byte("content"), 0o644)
if err != nil {
t.Fatalf("failed to write file.txt: %v", err)
}
gitCmd(t, repoPath, "--work-tree="+workDir, "add", ".")
gitCmd(t, repoPath, "--work-tree="+workDir, "commit", "-m", "init")
commit := gitCmd(t, repoPath, "rev-parse", "HEAD")
// Create two layers of symbolic refs
gitCmd(t, repoPath, "symbolic-ref", "refs/heads/level1", "refs/heads/level2")
gitCmd(t, repoPath, "symbolic-ref", "refs/heads/level2", "refs/heads/main")
gitCmd(t, repoPath, "update-ref", "refs/heads/main", commit)
repo, err := OpenRepository(repoPath)
if err != nil {
t.Fatalf("OpenRepository failed: %v", err)
}
defer func() { _ = repo.Close() }()
commitHash, err := repo.ParseHash(commit)
if err != nil {
t.Fatalf("ParseHash failed: %v", err)
}
resolved, err := repo.ResolveRefFully("refs/heads/level1")
if err != nil {
t.Fatalf("ResolveRefFully failed: %v", err)
}
if resolved != commitHash {
t.Errorf("ResolveRefFully: got hash %s, want %s", resolved, commitHash)
}
}
func TestResolveRefFullySymbolicCycle(t *testing.T) {
repoPath, cleanup := setupTestRepo(t)
defer cleanup()
repo, err := OpenRepository(repoPath)
if err != nil {
t.Fatalf("OpenRepository failed: %v", err)
}
defer func() { _ = repo.Close() }()
gitCmd(t, repoPath, "symbolic-ref", "refs/heads/A", "refs/heads/B")
gitCmd(t, repoPath, "symbolic-ref", "refs/heads/B", "refs/heads/A")
_, err = repo.ResolveRefFully("refs/heads/A")
if err == nil {
t.Fatalf("ResolveRefFully should fail on a symbolic cycle")
}
if !strings.Contains(err.Error(), "cycle") {
t.Fatalf("unexpected error for symbolic cycle: %v", err)
}
}
func TestResolveRefHashInput(t *testing.T) {
repoPath, cleanup := setupTestRepo(t)
defer cleanup()
workDir, cleanupWork := setupWorkDir(t)
defer cleanupWork()
err := os.WriteFile(filepath.Join(workDir, "file.txt"), []byte("content"), 0o644)
if err != nil {
t.Fatalf("failed to write file.txt: %v", err)
}
gitCmd(t, repoPath, "--work-tree="+workDir, "add", ".")
gitCmd(t, repoPath, "--work-tree="+workDir, "commit", "-m", "init")
commitHash := gitCmd(t, repoPath, "rev-parse", "HEAD")
repo, err := OpenRepository(repoPath)
if err != nil {
t.Fatalf("OpenRepository failed: %v", err)
}
defer func() { _ = repo.Close() }()
hashObj, err := repo.ParseHash(commitHash)
if err != nil {
t.Fatalf("ParseHash failed: %v", err)
}
ref, err := repo.ResolveRef(commitHash)
if err != nil {
t.Fatalf("ResolveRef(hash) failed: %v", err)
}
if ref.Kind != RefKindDetached {
t.Fatalf("expected RefKindDetached, got %v", ref.Kind)
}
if ref.Hash != hashObj {
t.Fatalf("hash mismatch: got %s, want %s", ref.Hash, hashObj)
}
hash, err := repo.ResolveRefFully(commitHash)
if err != nil {
t.Fatalf("ResolveRefFully(hash) failed: %v", err)
}
if hash != hashObj {
t.Fatalf("hash mismatch: got %s, want %s", hash, hashObj)
}
_, err = repo.ResolveRef("this_is_not_a_hash")
if err == nil {
t.Fatalf("expected error for invalid hash input")
}
}
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