code: def test_var_vals_shape(self):
      x = Variable("x", 1, 100).bind(3)
      assert ShapeTracker.from_shape((x, 3)).var_vals == {
          Variable("x", 1, 100): 3
      }
  
imports: import unittest
  from tinygrad.shape.shapetracker import ShapeTracker, View
  from tinygrad.shape.symbolic import Variable, NumNode
  from tinygrad.tensor import Tensor
label_desc: Use image node_id 2 for calling the TestSymbolicVarVals obj's underlying member method code with example usage: obj.test_var_vals_shape() without return types