code: def test_is_improvement(
      best: float,
      current: float,
      larger_is_better: bool,
      relative_delta: float,
      is_better: bool,
  ):
      """Test is_improvement()."""
      assert (
          is_improvement(
              best_value=best,
              current_value=current,
              larger_is_better=larger_is_better,
              relative_delta=relative_delta,
          )
          is is_better
      )
  
imports: import unittest
  from typing import List
  import numpy
  import pytest
  import torch
  import unittest_templates
  from torch.optim import Adam
  from pykeen.datasets import Nations
  from pykeen.evaluation import RankBasedEvaluator
  from pykeen.models import Model, TransE
  from pykeen.stoppers.early_stopping import EarlyStopper, EarlyStoppingLogic, is_improvement
  from pykeen.training import SLCWATrainingLoop
  from tests import cases
label_desc: Use image node_id 1 for calling a global function with example usage: test_is_improvement(best, current, larger_is_better, relative_delta, is_better) without return types