code: def _make_matrix(self, dtype, xp):
      shape = (self.m, self.m)
      density = self.nnz_per_row / self.m
      a = testing.shaped_random(shape, xp, dtype=dtype, scale=1)
      a = a / density
      a[a > 1] = 0
      return a
  
imports: import unittest
  import numpy
  import cupyx.scipy.sparse.csgraph
  from cupy import testing
label_desc: Use image node_id 1 for calling the TestConnectedComponents obj's underlying member method code with example usage: obj._make_matrix(dtype, xp) and returns: a