old_contents: import pytest
  
  from pytest_test_groups import get_group, get_group_size
  
  
  def test_group_size_computed_correctly_for_even_group():
      expected = 8
      actual = get_group_size(32, 4)  # 32 total tests; 4 groups
  
      assert expected == actual
  
  
  def test_group_size_computed_correctly_for_odd_group():
      expected = 8
      actual = get_group_size(31, 4)  # 31 total tests; 4 groups
  
      assert expected == actual
  
  
  def test_group_is_the_proper_size():
      items = [str(i) for i in range(32)]
      group = get_group(items, 8, 1)
  
      assert len(group) == 8
  
  
  def test_all_groups_together_form_original_set_of_tests():
      items = [str(i) for i in range(32)]
  
      groups = [get_group(items, 8, i) for i in range(1, 5)]
  
      combined = []
      for group in groups:
          combined.extend(group)
  
      assert combined == items
  
  
  def test_group_that_is_too_high_raises_value_error():
      items = [str(i) for i in range(32)]
  
      with pytest.raises(ValueError):
          get_group(items, 8, 5)
  
  
  def test_group_that_is_too_low_raises_value_error():
      items = [str(i) for i in range(32)]
  
      with pytest.raises(ValueError):
          get_group(items, 8, 0)
  
new_contents: from itertools import chain
  
  import pytest
  
  from pytest_test_groups import get_group
  
  
  def test_group_is_the_proper_size():
      items = [str(i) for i in range(32)]
      group = get_group(items, 8, 1)
  
      assert len(group) == 4
  
  
  def test_all_groups_together_form_original_set_of_tests():
      group_count = 8
      for item_size in range(group_count, 32):
          items = [str(i) for i in range(item_size)]
          groups = [get_group(items, group_count, i) for i in range(1, group_count + 1)]
          combined = set(chain.from_iterable(groups))
          assert combined == set(items)
  
  
  def test_group_that_is_too_high_raises_value_error():
      items = [str(i) for i in range(32)]
  
      with pytest.raises(ValueError):
          # When group_count=4, group_id=5 is out of bounds
          get_group(items, 4, 5)
  
  
  def test_group_that_is_too_low_raises_value_error():
      items = [str(i) for i in range(32)]
  
      with pytest.raises(ValueError):
          # When group_count=4, group_id=0 is out of bounds
          get_group(items, 4, 0)
  
subject: Fix tests