code: def test_get_valid_actions_adds_lambda_productions(self):
      state = GrammarState(
          ["s"],
          {("s", "x"): ["s"]},
          {"s": [1, 2]},
          {"s -> x": 5},
          is_nonterminal,
      )
      assert state.get_valid_actions() == [1, 2, 5]
      # We're doing this assert twice to make sure we haven't accidentally modified the state.
      assert state.get_valid_actions() == [1, 2, 5]
  
file_path: magnitude/pymagnitude/third_party/allennlp/tests/nn/decoding/grammar_state_test.py
imports: from __future__ import with_statement
  from __future__ import absolute_import
  import pytest
  from allennlp.common.testing import AllenNlpTestCase
  from allennlp.nn.decoding import GrammarState
label_desc: Use image node_id 3 for calling the TestGrammarState obj's underlying member method code with example usage: obj.test_get_valid_actions_adds_lambda_productions() without return types