code: def test_create_chunk_with_empty_content():
      chunk = StreamingChunk(content="")
      assert chunk.content == ""
      assert chunk.meta == {}
  
imports: import pytest
  from haystack.dataclasses import StreamingChunk
label_desc: Use image node_id 4 for calling a global function with example usage: test_create_chunk_with_empty_content() without return types