code: def test_broadcast_ellipsis(self):
      data = np.zeros(10)
      B = DataBuffer(data=data)
      data = np.zeros(5)
      B[Ellipsis] = data
      glir_cmd = B._glir.clear()[-1]
      assert glir_cmd[-1].shape == (10,)
  
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 20 for calling the DataBufferTest obj's underlying member method code with example usage: obj.test_broadcast_ellipsis() without return types