class_docstr: Unit tests for writing graphs in the sparse6 format.
  
  Most of the test cases were checked against the sparse6 encoder in Sage.
class_docstr_tok: ["Unit","tests","for","writing","graphs","in","the","sparse6","format",".","Most","of","the","test","cases","were","checked","against","the","sparse6","encoder","in","Sage","."]
code: def test_padding(self):
      codes = (b":Cdv", b":DaYn", b":EaYnN", b":FaYnL", b":GaYnLz")
      for n, code in enumerate(codes, start=4):
          G = nx.path_graph(n)
          result = BytesIO()
          nx.write_sparse6(G, result, header=False)
          assert result.getvalue() == code + b"\n"
  
imports: from io import BytesIO
  import pytest
  import networkx
  from networkx.utils import edges_equal, nodes_equal
label_desc: Use image node_id 8 for calling the TestWriteSparse6 obj's underlying member method code with example usage: obj.test_padding() without return types