text: from pathlib import Path
  from typing import Text
  
  import rasa.shared.utils.io
  from rasa.shared.core.domain import Domain
  from rasa.shared.core.events import ActionExecuted, SlotSet, UserUttered
  from rasa.shared.core.training_data import visualization
  import rasa.utils.io
  from rasa.shared.nlu.constants import TEXT, INTENT
  from rasa.shared.nlu.training_data.message import Message
  from rasa.shared.nlu.training_data.training_data import TrainingData
  
  
  def test_style_transfer():
      r = visualization._transfer_style({"class": "dashed great"}, {"class": "myclass"})
      assert r["class"] == "myclass dashed"
  
  
  def test_style_transfer_empty():
      r = visualization._transfer_style({"class": "dashed great"}, {"something": "else"})
      assert r["class"] == "dashed"
  
  
  def test_common_action_prefix():
      this = [
          ActionExecuted("action_listen"),
          ActionExecuted("greet"),
          UserUttered("hey"),
          ActionExecuted("amazing"),
          # until this point they are the same
          SlotSet("my_slot", "a"),
          ActionExecuted("a"),
          ActionExecuted("after_a"),
      ]
      other = [
          ActionExecuted("action_listen"),
          ActionExecuted("greet"),
          UserUttered("hey"),
          ActionExecuted("amazing"),
          # until this point they are the same
          SlotSet("my_slot", "b"),
          ActionExecuted("b"),
          ActionExecuted("after_b"),
      ]
      num_common = visualization._length_of_common_action_prefix(this, other)
  
      assert num_common == 3
  
  
  def test_common_action_prefix_equal():
      this = [
          ActionExecuted("action_listen"),
          ActionExecuted("greet"),
          UserUttered("hey"),
          ActionExecuted("amazing"),
      ]
      other = [
          ActionExecuted("action_listen"),
          ActionExecuted("greet"),
          UserUttered("hey"),
          ActionExecuted("amazing"),
      ]
      num_common = visualization._length_of_common_action_prefix(this, other)
  
      assert num_common == 3
  
  
  def test_common_action_prefix_unequal():
      this = [
          ActionExecuted("action_listen"),
          ActionExecuted("greet"),
          UserUttered("hey"),
      ]
      other = [
          ActionExecuted("greet"),
          ActionExecuted("action_listen"),
          UserUttered("hey"),
      ]
      num_common = visualization._length_of_common_action_prefix(this, other)
  
      assert num_common == 0
  
  
  def test_graph_persistence(domain: Domain, tmp_path: Path):
      from os.path import isfile
      from networkx.drawing import nx_pydot
      import rasa.shared.core.training_data.loading as core_loading
  
      story_steps = core_loading.load_data_from_resource(
          "data/test_yaml_stories/stories.yml", domain
      )
      out_file = str(tmp_path / "graph.html")
      generated_graph = visualization.visualize_stories(
          story_steps,
          domain,
          output_file=out_file,
          max_history=3,
          should_merge_nodes=False,
      )
  
      generated_graph = nx_pydot.to_pydot(generated_graph)
  
      assert isfile(out_file)
  
      content = rasa.shared.utils.io.read_file(out_file)
  
      assert "isClient = true" in content
      assert "graph = `{}`".format(generated_graph.to_string()) in content
  
  
  def test_merge_nodes(domain: Domain, tmp_path: Path):
      from os.path import isfile
      import rasa.shared.core.training_data.loading as core_loading
  
      story_steps = core_loading.load_data_from_resource(
          "data/test_yaml_stories/stories.yml", domain
      )
      out_file = str(tmp_path / "graph.html")
      visualization.visualize_stories(
          story_steps,
          domain,
          output_file=out_file,
          max_history=3,
          should_merge_nodes=True,
      )
      assert isfile(out_file)
  
  
  def test_story_visualization(domain: Domain, tmp_path: Path):
      import rasa.shared.core.training_data.loading as core_loading
  
      story_steps = core_loading.load_data_from_resource(
          "data/test_yaml_stories/stories.yml", domain
      )
      out_file = tmp_path / "graph.html"
      generated_graph = visualization.visualize_stories(
          story_steps,
          domain,
          output_file=str(out_file),
          max_history=3,
          should_merge_nodes=False,
      )
  
      assert str(None) not in out_file.read_text()
      assert "/affirm" in out_file.read_text()
      assert len(generated_graph.nodes()) == 51
      assert len(generated_graph.edges()) == 56
  
  
  def test_story_visualization_with_training_data(
      domain: Domain, tmp_path: Path, nlu_data_path: Text
  ):
      import rasa.shared.core.training_data.loading as core_loading
  
      story_steps = core_loading.load_data_from_resource(
          "data/test_yaml_stories/stories.yml", domain
      )
      out_file = tmp_path / "graph.html"
      test_text = "test text"
      test_intent = "affirm"
      generated_graph = visualization.visualize_stories(
          story_steps,
          domain,
          output_file=str(out_file),
          max_history=3,
          should_merge_nodes=False,
          nlu_training_data=TrainingData(
              [Message({TEXT: test_text, INTENT: test_intent})]
          ),
      )
  
      assert test_text in out_file.read_text()
      assert test_intent not in out_file.read_text()
  
      assert len(generated_graph.nodes()) == 51
      assert len(generated_graph.edges()) == 56
  
  
  def test_story_visualization_with_merging(domain: Domain):
      import rasa.shared.core.training_data.loading as core_loading
  
      story_steps = core_loading.load_data_from_resource(
          "data/test_yaml_stories/stories.yml", domain
      )
      generated_graph = visualization.visualize_stories(
          story_steps, domain, output_file=None, max_history=3, should_merge_nodes=True,
      )
      assert 15 < len(generated_graph.nodes()) < 33
  
      assert 20 < len(generated_graph.edges()) < 33
  