code: def test_convert_into_template():
      df_non_existant_field_name = pd.DataFrame(
          {"question": ["question"]}
      )
  
      template = "Context: {context} Question: {question} Answer:"
      with pytest.raises(ValueError):
          convert_into_template(df_non_existant_field_name, template)
  
      df = pd.DataFrame(
          {
              "question": ["question sample"],
              "context": ["context sample"],
          }
      )
  
      df_prompt = pd.DataFrame(
          {
              "question": ["question sample"],
              "context": ["context sample"],
              "prompt": [
                  "Context: context sample Question: question sample Answer:"
              ],
          }
      )
      assert convert_into_template(df, template).equals(df_prompt)
  
imports: import pandas
  import pytest
  from ..customization_dataset_preparation import convert_into_prompt_completion_only, convert_into_template, drop_duplicated_rows, drop_unrequired_fields, get_common_suffix, get_prepared_filename, parse_template, recommend_hyperparameters, show_first_example_in_df, split_into_train_validation, template_mapper, validate_template, warn_and_drop_long_samples, warn_completion_is_not_empty, warn_duplicated_rows, warn_imbalanced_completion, warn_low_n_samples, warn_missing_suffix
label_desc: Use image node_id 12 for calling a global function with example usage: test_convert_into_template() without return types