code: def test_plus1(self):
      def f(a):
          return (a + 1).realize()
  
      jf = TinyJit(f)
      for i in range(1, 5):
          vi = Variable("i", 1, 10).bind(i)
          a = Tensor.rand(3, i)
          symbolic = jf(a.reshape(3, vi)).reshape(3, i).numpy()
          expected = f(a).numpy()
          np.testing.assert_allclose(
              symbolic, expected, atol=1e-6, rtol=1e-6
          )
      assert_jit_cache_len(jf, 1)
  
imports: import unittest
  from test.helpers import assert_jit_cache_len
  from tinygrad.jit import TinyJit
  from tinygrad.helpers import getenv
  from tinygrad.shape.symbolic import Variable
  from tinygrad.tensor import Tensor
  import numpy
label_desc: Use image node_id 1 for calling the TestSymbolicJit obj's underlying member method code with example usage: obj.test_plus1() and returns: unknown