code: def test_vgg7(self):
      from examples.vgg7_helpers.waifu2x import Vgg7, image_load
  
      # Create in tinygrad
      Tensor.manual_seed(1337)
      mdl = Vgg7()
      mdl.load_from_pretrained()
  
      # Scale up an image
      test_x = image_load(
          pathlib.Path(__file__).parent / "waifu2x/input.png"
      )
      test_y = image_load(
          pathlib.Path(__file__).parent / "waifu2x/output.png"
      )
      scaled = mdl.forward_tiled(test_x, 156)
      scaled = np.fmax(0, np.fmin(1, scaled))
      np.testing.assert_allclose(scaled, test_y, atol=5e-3, rtol=5e-3)
  
imports: import pathlib
  import unittest
  import numpy
  from tinygrad.tensor import Tensor
label_desc: Use image node_id 1 for calling the TestVGG7 obj's underlying member method code with example usage: obj.test_vgg7() without return types