code: def test_empty_chain_contains_preset_and_fixed():
      final_cfg, summary = chain_evaluate_config_scopes(
          [], fixed={"a": 0}, preset={"a": 1, "b": 2}
      )
      assert set(final_cfg.keys()) == {"a", "b"}
      assert final_cfg["a"] == 0
      assert final_cfg["b"] == 2
  
file_path: sacred/tests/test_config/test_config_scope_chain.py
imports: import pytest
  from sacred.config import ConfigScope, ConfigDict, chain_evaluate_config_scopes
label_desc: Use image node_id 9 for calling a global function with example usage: test_empty_chain_contains_preset_and_fixed() without return types