code: def test_should_extract_entity_values(self):
      # Given
      set_light_color_yaml = io.StringIO(
          """
  ---
  type: intent
  name: setLightColor
  utterances:
    - set the lights to [color](blue)
    - change the light to [color](yellow) in the [room](bedroom)"""
      )
  
      turn_light_on_yaml = io.StringIO(
          """
  ---
  type: intent
  name: turnLightOn
  utterances:
    - turn the light on in the [room](kitchen)
    - turn the [room](bathroom)'s lights on"""
      )
  
      color_yaml = io.StringIO(
          """
  type: entity
  name: color
  values:
  - [blue, cyan]
  - red"""
      )
  
      room_yaml = io.StringIO(
          """
  type: entity
  name: room
  values:
  - garage
  - [living room, main room]"""
      )
  
      dataset_files = [
          set_light_color_yaml,
          turn_light_on_yaml,
          color_yaml,
          room_yaml,
      ]
      dataset = Dataset.from_yaml_files("en", dataset_files).json
      dataset = validate_and_format_dataset(dataset)
  
      # When
      entity_values = extract_entity_values(
          dataset, apply_normalization=True
      )
  
      # Then
      expected_values = {
          "setLightColor": {
              "blue",
              "yellow",
              "cyan",
              "red",
              "bedroom",
              "garage",
              "living room",
              "main room",
              "kitchen",
              "bathroom",
          },
          "turnLightOn": {
              "bedroom",
              "garage",
              "living room",
              "main room",
              "kitchen",
              "bathroom",
          },
      }
      self.assertDictEqual(expected_values, entity_values)
  
imports: from __future__ import unicode_literals
  import io
  from unittest import TestCase
  from snips_nlu.dataset import Dataset, validate_and_format_dataset
  from snips_nlu.dataset.utils import extract_entity_values
label_desc: Use image node_id 1 for calling the TestDatasetUtils obj's underlying member method code with example usage: obj.test_should_extract_entity_values() without return types