code: def test_trunc_normal_generator(self):
      gen = torch.Generator()
      gen.manual_seed(42)
      input_tensor = torch.empty(5)
      init.trunc_normal_(input_tensor, generator=gen)
  
      ref = torch.empty(5)
      torch.manual_seed(42)
      init.trunc_normal_(ref)
  
      self.assertEqual(input_tensor, ref)
      assert self._is_trunc_normal(
          input_tensor, mean=0, std=1, a=0, b=1
      )
  
imports: import random
  import unittest
  import math
  import string
  from functools import reduce
  from operator import mul
  from torch.testing._internal.common_utils import TestCase, TEST_SCIPY, skipIfNoLapack, skipIfTorchDynamo, run_tests
  import torch
  import torch.nn.init
  import torch.nn.functional
label_desc: Use image node_id 15 for calling the TestNNInit obj's underlying member method code with example usage: obj.test_trunc_normal_generator() without return types