text: import random
  import string
  import time
  
  import HABApp
  from HABAppTests import ItemWaiter, OpenhabTmpItem, TestBaseRule, get_openhab_test_states, get_openhab_test_types, \
      get_random_name
  
  
  class TestOpenhabInterface(TestBaseRule):
  
      def __init__(self):
          super().__init__()
  
          self.add_test('Interface item exists', self.test_item_exists)
          self.add_test('Interface item create/remove', self.test_item_create_delete)
          self.add_test('Interface group create/remove', self.test_item_create_delete_group)
          self.add_test('Interface get item definition', self.test_item_definition)
          self.add_test('Interface change type', self.test_item_change_type)
  
          # test the states
          for oh_type in get_openhab_test_types():
              self.add_test( f'post_update {oh_type}', self.test_post_update, oh_type, get_openhab_test_states(oh_type))
  
          # test json post
          self.add_test('post_update (by_json)', self.test_umlaute)
          self.add_test('test_item_not_found', self.test_openhab_item_not_found)
          self.add_test('Interface Metadata', self.test_metadata)
          self.add_test('Test async order', self.test_async_oder)
  
      def test_item_exists(self):
          assert not self.openhab.item_exists('item_which_does_not_exist')
          assert self.openhab.item_exists('TestString')
  
      def test_item_create_delete(self):
  
          test_defs = []
          for type in get_openhab_test_types():
              test_defs.append((type, get_random_name()))
          test_defs.append(('Number', 'HABApp_Ping'))
  
          for item_type, item_name in test_defs:
              assert not self.openhab.item_exists(item_name)
  
              self.openhab.create_item(item_type, item_name)
              assert self.openhab.item_exists(item_name)
  
              self.openhab.remove_item(item_name)
              assert not self.openhab.item_exists(item_name)
  
      def test_item_change_type(self):
          test_item = ''.join(random.choice(string.ascii_letters) for _ in range(20))
          assert not self.openhab.item_exists(test_item)
  
          self.openhab.create_item('String', test_item)
          assert self.openhab.item_exists(test_item)
  
          # change item type to number and ensure HABApp picks up correctly on the new type
          self.openhab.create_item('Number', test_item)
  
          end = time.time() + 2
          while True:
              time.sleep(0.01)
              if time.time() > end:
                  HABApp.openhab.items.NumberItem.get_item(test_item)
                  break
  
              if isinstance(HABApp.core.Items.get_item(test_item), HABApp.openhab.items.NumberItem):
                  break
  
          self.openhab.remove_item(test_item)
  
      def test_item_create_delete_group(self):
          test_item = ''.join(random.choice(string.ascii_letters) for _ in range(20))
          test_group = ''.join(random.choice(string.ascii_letters) for _ in range(20))
          assert not self.openhab.item_exists(test_item)
          assert not self.openhab.item_exists(test_item)
  
          self.openhab.create_item('Group', test_group)
          assert self.openhab.item_exists(test_group)
          self.openhab.create_item('String', test_item, groups=[test_group])
          assert self.openhab.item_exists(test_item)
  
          item = self.openhab.get_item(test_item)
          self.openhab.get_item(test_group)
          assert test_group in item.groups
  
          self.openhab.remove_item(test_group)
          self.openhab.remove_item(test_item)
  
  
      def test_post_update(self, oh_type, values):
          if isinstance(values, str):
              values = [values]
  
          with OpenhabTmpItem(None, oh_type) as item, ItemWaiter(item) as waiter:
              for value in values:
                  self.openhab.post_update(item, value)
                  waiter.wait_for_state(value)
  
              for value in values:
                  if oh_type != 'Contact':
                      self.openhab.send_command(item, value)
                      waiter.wait_for_state(value)
  
          return waiter.states_ok
  
      def test_umlaute(self):
          LABEL = 'äöß'
          NAME = 'TestUmlaute'
  
          self.openhab.create_item('String', NAME, label=LABEL)
          ret = self.openhab.get_item(NAME)
          assert ret.label == LABEL, f'"{LABEL}" != "{ret.label}"'
  
      def test_openhab_item_not_found(self):
          test_item = ''.join(random.choice(string.ascii_letters) for _ in range(20))
          try:
              self.openhab.get_item(test_item)
          except Exception as e:
              if isinstance(e, HABApp.openhab.errors.ItemNotFoundError):
                  return True
  
          return 'Exception not raised!'
  
      def test_item_definition(self):
          self.openhab.get_item('TestGroupAVG')
          self.openhab.get_item('TestNumber')
          self.openhab.get_item('TestString')
  
      def test_metadata(self):
          with OpenhabTmpItem(None, 'String') as item:
              self.openhab.set_metadata(item, 'MyNameSpace', 'MyValue', {'key': 'value'})
              self.openhab.remove_metadata(item, 'MyNameSpace')
  
      def test_async_oder(self):
          with OpenhabTmpItem('AsyncOrderTest', 'String') as item, ItemWaiter(item) as waiter:
              for _ in range(10):
                  for i in range(0, 5):
                      item.oh_post_update(i)
              waiter.wait_for_state('4')
  
              time.sleep(1)
              return waiter.states_ok
  
  
  TestOpenhabInterface()
  