test(git): Enhance Git parser tests with temporary repository setup (#406)

* test(git): Enhance Git parser tests with temporary repository setup

Added a temporary Git repository setup in the test for the Git parser. This includes initializing a repository, creating a remote, adding a test file, and committing it before parsing. Updated assertions to verify the correct URL and commit SHA from the newly created repository.

Signed-off-by: Zhao Chen <zhaochen.zju@gmail.com>
Signed-off-by: Zhao Chen <winters.zc@antgroup.com>

* fix(test): address PR review comments

- Use fixed time (time.Date) instead of time.Now() for deterministic
  commit hashes in tests
- Remove testdata/git-repo submodule since tests now use temporary
  repositories

Co-Authored-By: Claude Opus 4.6 <noreply@anthropic.com>
Signed-off-by: Zhao Chen <winters.zc@antgroup.com>

---------

Signed-off-by: Zhao Chen <zhaochen.zju@gmail.com>
Signed-off-by: Zhao Chen <winters.zc@antgroup.com>
Co-authored-by: Claude Opus 4.6 <noreply@anthropic.com>

Author: aftersnow

.gitmodules

@@ -17,16 +17,61 @@
 package source
 
 import (
+	"os"
+	"path/filepath"
 	"testing"
+	"time"
 
+	gogit "github.com/go-git/go-git/v5"
+	"github.com/go-git/go-git/v5/config"
+	"github.com/go-git/go-git/v5/plumbing/object"
 	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
 )
 
 func TestGit(t *testing.T) {
+	// Create a temporary directory for the test git repository
+	tempDir, err := os.MkdirTemp("", "git-test-repo")
+	require.NoError(t, err)
+	defer os.RemoveAll(tempDir)
+
+	// Initialize a new git repository
+	repo, err := gogit.PlainInit(tempDir, false)
+	require.NoError(t, err)
+
+	// Create a remote "origin" with a test URL
+	expectedURL := "https://github.com/octocat/Hello-World.git"
+	_, err = repo.CreateRemote(&config.RemoteConfig{
+		Name: "origin",
+		URLs: []string{expectedURL},
+	})
+	require.NoError(t, err)
+
+	// Create a test file and commit it
+	testFile := filepath.Join(tempDir, "README.md")
+	err = os.WriteFile(testFile, []byte("# Hello World"), 0644)
+	require.NoError(t, err)
+
+	worktree, err := repo.Worktree()
+	require.NoError(t, err)
+
+	_, err = worktree.Add("README.md")
+	require.NoError(t, err)
+
+	commit, err := worktree.Commit("Initial commit", &gogit.CommitOptions{
+		Author: &object.Signature{
+			Name:  "Test User",
+			Email: "test@example.com",
+			When:  time.Date(2024, 1, 1, 12, 0, 0, 0, time.UTC),
+		},
+	})
+	require.NoError(t, err)
+
+	// Now test the git parser
 	parser := &git{}
-	info, err := parser.Parse("testdata/git-repo")
+	info, err := parser.Parse(tempDir)
 	assert.NoError(t, err)
-	assert.Equal(t, "https://github.com/octocat/Hello-World.git", info.URL, "source url should be equal to expected")
-	assert.Equal(t, "7fd1a60b01f91b314f59955a4e4d4e80d8edf11d", info.Commit, "commit should be equal to expected")
+	assert.Equal(t, expectedURL, info.URL, "source url should be equal to expected")
+	assert.Equal(t, commit.String(), info.Commit, "commit should be equal to expected")
 	assert.Equal(t, false, info.Dirty, "dirty should be equal to expected")
 }