text: import pytest
  
  from worf.casing import camel_to_snake, snake_to_camel
  from worf.exceptions import NamingThingsError
  
  
  def test_converts_to_camel():
      assert camel_to_snake("camelToSnake") == "camel_to_snake"
  
  
  def test_converts_to_snake():
      assert snake_to_camel("snake_to_camel") == "snakeToCamel"
  
  
  def test_camel_to_snake_raises_NamingThingsError():
      with pytest.raises(NamingThingsError):
          camel_to_snake("Not_a_camel")
  
  
  def test_snake_to_camel_raises_NamingThingsError():
      with pytest.raises(NamingThingsError):
          snake_to_camel("NotASnake")
  
  
  def test_camel_to_snake_returns_fast_for_lc():
      assert "snake" == camel_to_snake("snake")
  
  
  def test_camel_to_snake_catches_IDs():
      with pytest.raises(NamingThingsError):
          camel_to_snake("thisIsNotAnValidID")
  
  
  def test_camel_to_snake_catches_invalid_chars():
      with pytest.raises(NamingThingsError):
          camel_to_snake("thisAintNo🐪")
  
  
  def test_snake_to_camel_catches_invalid_chars():
      with pytest.raises(NamingThingsError):
          snake_to_camel("this_aint_no_🐍")
  