code: def test_no_storage_copy(self):
      data = np.ones(100, np.float32)
      B = DataBuffer(data)
      assert B.stride == 4
  
imports: import unittest
  import numpy
  from vispy.testing import run_tests_if_main
  from vispy.gloo.buffer import Buffer, DataBuffer, DataBufferView, VertexBuffer, IndexBuffer
label_desc: Use image node_id 3 for calling the DataBufferTest obj's underlying member method code with example usage: obj.test_no_storage_copy() without return types