Add test pkg and mock server for traceectl

cmd/traceectl/test/server.go

@@ -0,0 +1,41 @@
+package test
+
+import (
+	"fmt"
+	"log"
+	"net"
+	"os"
+)
+
+const DefaultSocket = "/tmp/tracee.sock"
+
+type Server struct {
+	addr     string
+	listener net.Listener
+}
+
+func SetupMockSocket() (*Server, error) {
+	listener, err := net.Listen("unix", DefaultSocket)
+	if err != nil {
+		return nil, err
+	}
+	return &Server{
+		addr:     DefaultSocket,
+		listener: listener,
+	}, nil
+}
+
+func (s *Server) TeardownMockSocket() error {
+	if s.listener != nil {
+		if err := s.listener.Close(); err != nil {
+			return fmt.Errorf("failed to close mock socket: %w", err) // Wrap the error
+		}
+	}
+	// Check if the socket file still exists and remove it
+	if _, err := os.Stat(DefaultSocket); err == nil {
+		if err := os.Remove(DefaultSocket); err != nil {
+			log.Printf("Warning: failed to remove mock socket file: %v", err)
+		}
+	}
+	return nil
+}