code: def test_update(self):
      es = early_stopping.EarlyStopping(min_delta=0, patience=0)
  
      for i in range(2):
          improve_steps = 0
          for step in range(10):
              metric = 1.0
              es = es.update(metric)
              if not es.has_improved:
                  improve_steps += 1
              if es.should_stop:
                  break
  
          self.assertEqual(improve_steps, 1)
          self.assertEqual(step, 1)
  
          es = es.reset()
  
imports: import jax
  from absl.testing import absltest
  from flax.training import early_stopping
label_desc: Use image node_id 1 for calling the EarlyStoppingTests obj's underlying member method code with example usage: obj.test_update() without return types