code: def test_metrics_abs():
      """Test that `abs` operator works and returns a compositional metric."""
      first_metric = DummyMetric(-1)
  
      final_abs = abs(first_metric)
  
      assert isinstance(final_abs, CompositionalMetric)
      final_abs.update()
      assert torch.allclose(tensor(1), final_abs.compute())
  
imports: from operator import neg, pos
  from typing import Any
  import pytest
  import torch
  from torch import tensor
  from torchmetrics.metric import CompositionalMetric, Metric
label_desc: Use image node_id 24 for calling a global function with example usage: test_metrics_abs() without return types