code: def test_size(self):
      x = cupy.arange(3).astype("i")
      y = cupy.ElementwiseKernel(
          "raw int32 x",
          "int32 y",
          "y = x.size()",
          "test_carray_size",
      )(x, size=1)
      assert int(y[0]) == 3
  
file_path: cupy/tests/cupy_tests/core_tests/test_carray.py
imports: import unittest
  import cupy
  from cupy import testing
label_desc: Use image node_id 1 for calling the TestCArray obj's underlying member method code with example usage: obj.test_size() without return types