code: def test_vgg19_architecture(self):
      vgg19 = architectures.vgg19()
      self.assertShapesEqual(vgg19.input_shape, (None, 224, 224, 3))
      self.assertShapesEqual(vgg19.output_shape, (None, 1000))
  
      random_input = asfloat(np.random.random((7, 224, 224, 3)))
      prediction = self.eval(vgg19.output(random_input))
      self.assertEqual(prediction.shape, (7, 1000))
  
imports: import numpy
  from neupy.utils import asfloat
  from neupy import architectures
  from base import BaseTestCase
label_desc: Use image node_id 1 for calling the VGG19TestCase obj's underlying member method code with example usage: obj.test_vgg19_architecture() without return types