docstr: Checks input parameters correctly raises errors. For example,  `a` should be larger than 1
docstr_tok: ["Checks","input","parameters","correctly","raises","errors",".","For","example",",","`","a","`","should","be","larger","than","1"]
code: def test_arf_layout_negative_a_check(self):
      """
      Checks input parameters correctly raises errors. For example,  `a` should be larger than 1
      """
      G = self.Gs
      pytest.raises(ValueError, nx.arf_layout, G=G, a=-1)
  
imports: import pytest
  import networkx
label_desc: Use image node_id 31 for calling the TestLayout obj's underlying member method code with example usage: obj.test_arf_layout_negative_a_check() without return types