fix: Improve error handling and fix wrong compress dir for windows (#367) (#368)

* fix: Improve error handling and fix wrong compress dir for windows
* refactor: Refactor fileutil package for pass linter

utils/fileutil/fileutil_test.go

@@ -0,0 +1,52 @@
+package fileutil
+
+import (
+	"os"
+	"path/filepath"
+	"testing"
+
+	"github.com/stretchr/testify/assert"
+	"github.com/stretchr/testify/require"
+)
+
+func setupTestDir(t *testing.T, files []string) string {
+	t.Helper() // Marks the function as a helper function.
+
+	tempDir, err := os.MkdirTemp("", "testCompressDir")
+	require.NoError(t, err, "failed to create a temporary directory")
+
+	for _, file := range files {
+		filePath := filepath.Join(tempDir, file)
+		err := os.WriteFile(filePath, []byte("test content"), 0o644)
+		require.NoError(t, err, "failed to create a test file")
+	}
+	return tempDir
+}
+
+func TestCompressDir(t *testing.T) {
+	t.Run("Normal Operation", func(t *testing.T) {
+		tempDir := setupTestDir(t, []string{"file1.txt", "file2.txt", "file3.txt"})
+		defer os.RemoveAll(tempDir)
+
+		err := CompressDir(tempDir)
+		assert.NoError(t, err, "compressDir should not return an error")
+
+		// Check if the zip file exists
+		zipFile := filepath.Join(tempDir, filepath.Base(tempDir)+".zip")
+		assert.FileExists(t, zipFile, "zip file should be created")
+	})
+
+	t.Run("Directory Does Not Exist", func(t *testing.T) {
+		err := CompressDir("/path/to/nonexistent/directory")
+		assert.Error(t, err, "should return an error for non-existent directory")
+	})
+
+	t.Run("Empty Directory", func(t *testing.T) {
+		tempDir, err := os.MkdirTemp("", "testEmptyDir")
+		require.NoError(t, err, "failed to create empty test directory")
+		defer os.RemoveAll(tempDir)
+
+		err = CompressDir(tempDir)
+		assert.Error(t, err, "should return an error for an empty directory")
+	})
+}