code: def testInputSize(self):
      batch_size = 1
      input_size = 2
      output_size = 3
      mod = linear.Linear(output_size)
      mod(tf.ones([batch_size, input_size]))
      self.assertEqual(mod.input_size, input_size)
  
imports: from absl.testing import parameterized
  import numpy
  from sonnet.src import linear
  from sonnet.src import test_utils
  import tensorflow
label_desc: Use image node_id 15 for calling the LinearTest obj's underlying member method code with example usage: obj.testInputSize() without return types