package index

import (
	"os"
	"os/exec"
	"path/filepath"
	"testing"
)

func TestGetGitCommit(t *testing.T) {
	// 创建临时 git 仓库
	tmpDir := t.TempDir()
	exec.Command("git", "-C", tmpDir, "init").Run()
	exec.Command("git", "-C", tmpDir, "config", "user.email", "test@test.com").Run()
	exec.Command("git", "-C", tmpDir, "config", "user.name", "test").Run()
	os.WriteFile(filepath.Join(tmpDir, "test.md"), []byte("test"), 0644)
	exec.Command("git", "-C", tmpDir, "add", ".").Run()
	exec.Command("git", "-C", tmpDir, "commit", "-m", "init").Run()

	commit, err := GetGitCommit(tmpDir)
	if err != nil {
		t.Fatalf("GetGitCommit failed: %v", err)
	}
	if len(commit) != 40 {
		t.Errorf("commit length = %d, want 40", len(commit))
	}
}

func TestGetGitCommitNotGit(t *testing.T) {
	tmpDir := t.TempDir()
	_, err := GetGitCommit(tmpDir)
	if err == nil {
		t.Error("expected error for non-git directory")
	}
}