code: import pytest
  import numpy as np
  from landlab import RasterModelGrid
  from landlab.data_record import DataRecord
  
  grid = RasterModelGrid((3,3))
  
  @pytest.fixture
  def dr_time():
      time=[0.]
      data_vars={'mean_elevation' : (['time'], np.array([100]))}
      attrs={'time_units' : 'y'}
      return DataRecord(grid=grid,
                        time=time,
                        data_vars=data_vars,
                        attrs=attrs)
  
  
  @pytest.fixture
  def dr_item():
      my_items2 = {'grid_element': np.array(('node', 'link'), dtype=str),
                   'element_id': np.array([1, 3])}
      return DataRecord(grid=grid,
                        items=my_items2)
  
  @pytest.fixture
  def dr_2dim():
      time=[0.]
      my_items3 = {'grid_element':np.array([['node'], ['link']]),
                   'element_id': np.array([[1],[3]])}
      my_data_vars = {'mean_elevation' : (['time'], [110.]),
                  'item_size' : (['item_id', 'time'],
                                 np.array([[0.3], [0.4]]))}
      return DataRecord(grid=grid,
                        time=time,
                        items=my_items3,
                        data_vars=my_data_vars)
  
  @pytest.fixture
  def dr_nodim():
      return DataRecord(grid=grid)
  
  
apis: numpy.array