code: def test_random_kernel_graph(self):
      def integral(u, w, z):
          return c * (z - w)
  
      def root(u, w, r):
          return r / c + w
  
      c = 1
      graph = nx.random_kernel_graph(1000, integral, root)
      graph = nx.random_kernel_graph(1000, integral, root, seed=42)
      assert len(graph) == 1000
  
imports: import pytest
  import networkx
label_desc: Use image node_id 7 for calling the TestGeneratorsRandom obj's underlying member method code with example usage: obj.test_random_kernel_graph() and returns: unknown, unknown