new_contents: import unittest
  
  import cupy as cp
  
  from common import gpu_test
  
  
  class TestCupy(unittest.TestCase):
      @gpu_test
      def test_kernel(self):
          x = cp.arange(6, dtype='f').reshape(2, 3)
          y = cp.arange(3, dtype='f')
          kernel = cp.ElementwiseKernel(
              'float32 x, float32 y', 'float32 z',
              '''if (x - 2 > y) {
                  z = x * y;
              } else {
                  z = x + y;
              }''',
              'my_kernel')
          r = kernel(x, y)
          
          self.assertEqual((2, 3), r.shape)
subject: Add cupy tests