old_contents: import pytest
  
  import gdsfactory as gf
  
  
  def test_named_references():
      c = gf.Component("component_with_fill")
      c.add_ref(gf.components.straight(), alias="straight_1")
      c.add_ref(gf.components.straight())
      assert len(c.named_references) == 2
  
  
  def test_named_references_with_alias():
      c = gf.Component("component_with_fill")
      c.add_ref(gf.components.straight(), alias="straight_1")
      c.add_ref(gf.components.straight(), alias="straight_1")
  
  
  def test_fail_when_alias_exists():
      c = gf.Component("component_with_fill")
      ref1 = c.add_ref(gf.components.straight())
      ref1.name = "straight_1"
  
      with pytest.raises(ValueError):
          ref2 = c.add_ref(gf.components.straight())
          ref2.name = "straight_1"
  
  
  if __name__ == "__main__":
      # test_fail_when_alias_exists()
      # test_named_references_with_alias()
      test_named_references()
  
      # import gdsfactory as gf
  
      # c = gf.Component("component_with_fill")
      # ref1 = c.add_ref(gf.components.straight())
      # ref1.name = "straight_1"
  
      # ref2 = c.add_ref(gf.components.straight())
      # ref2.name = "straight_1"
      # print(c.named_references)
      # c.show()
  
new_contents: import pytest
  
  import gdsfactory as gf
  
  
  def test_named_references():
      c = gf.Component("component_with_fill")
      c.add_ref(gf.components.straight(), alias="straight_1")
      c.add_ref(gf.components.straight())
      assert len(c.named_references) == 2
  
  
  def test_named_references_with_alias():
      c = gf.Component("component_with_fill")
      c.add_ref(gf.components.straight(), alias="straight_1")
      with pytest.raises(ValueError):
          c.add_ref(gf.components.straight(), alias="straight_1")
  
  
  def test_fail_when_alias_exists():
      c = gf.Component("component_with_fill")
      ref1 = c.add_ref(gf.components.straight())
      ref1.name = "straight_1"
  
      with pytest.raises(ValueError):
          ref2 = c.add_ref(gf.components.straight())
          ref2.name = "straight_1"
  
  
  if __name__ == "__main__":
      # test_fail_when_alias_exists()
      test_named_references_with_alias()
      # test_named_references()
  
      # import gdsfactory as gf
  
      # c = gf.Component("component_with_fill")
      # ref1 = c.add_ref(gf.components.straight())
      # ref1.name = "straight_1"
  
      # ref2 = c.add_ref(gf.components.straight())
      # ref2.name = "straight_1"
      # print(c.named_references)
      # c.show()
  
subject: fix tests