code: def test_invalid_dtype(self):
      with self.assertRaises(TypeError):
          testing.generate_matrix(
              (2, 2), dtype=numpy.int32, singular_values=1
          )
  
file_path: chainer/tests/chainer_tests/testing_tests/test_matrix.py
imports: import unittest
  import numpy
  from chainer import testing
  from chainer.testing import matrix
label_desc: Use image node_id 3 for calling the TestGenerateMatrixInvalid obj's underlying member method code with example usage: obj.test_invalid_dtype() without return types