code: def test_empty_dataframe():
      # Arrange
      data = {"col1": []}
      dataframe = pd.DataFrame(data=data)
      # Act
      assert_that(
          calling(MixedNulls().run).with_args(dataframe),
          raises(
              DeepchecksValueError,
              r"Can\'t create a Dataset object with an empty dataframe",
          ),
      )
  
imports: import numpy
  import pandas
  from hamcrest import any_of, assert_that, calling, close_to, equal_to, greater_than, has_entries, has_entry, has_items, has_length, is_, raises
  from deepchecks.core.errors import DatasetValidationError, DeepchecksValueError
  from deepchecks.tabular.checks.data_integrity.mixed_nulls import MixedNulls
  from deepchecks.tabular.dataset import Dataset
  from tests.base.utils import equal_condition_result
label_desc: Use image node_id 4 for calling a global function with example usage: test_empty_dataframe() without return types