code: def test_to_pandas_empty():
      df = SentinelAPI.to_dataframe({})
      assert type(df).__name__ == "DataFrame"
      assert len(df) == 0
  
file_path: sentinelsat/tests/test_pandas.py
imports: import sys
  import pytest
  from sentinelsat import SentinelAPI
label_desc: Use image node_id 4 for calling a global function with example usage: test_to_pandas_empty() without return types