code: def test_label_method():
      """Test the label method for the Snapshot operation."""
      assert Snapshot().label() == "|Snap|"
      assert Snapshot("my_label").label() == "|Snap|"
  
imports: import pytest
  import numpy
  from pennylane import Snapshot
  import pennylane
label_desc: Use image node_id 2 for calling a global function with example usage: test_label_method() without return types