old_contents: import numpy as np
  
  import gdsfactory as gf
  from gdsfactory.component import Component
  from gdsfactory.cross_section import cross_section
  
  LENGTH = 0.5
  CELL_NAME = "straight_L500n"
  CUSTOM_LABEL = "straight_cband"
  
  
  def test_label_fiber_array_custom(length=LENGTH, cell_name=CELL_NAME) -> Component:
      c = gf.components.straight(length=LENGTH, cross_section=cross_section)
  
      assert len(c.labels) == 0, len(c.labels)
  
      cte = gf.routing.add_fiber_array(
          component=c,
          with_loopback=False,
          component_name=CUSTOM_LABEL,
          cross_section=cross_section,
      )
      assert len(cte.labels) == 2, len(cte.labels)
      l0 = cte.labels[0].text
      l1 = cte.labels[1].text
  
      assert l0 == f"opt_te_1530_({CUSTOM_LABEL})_0_o1", l0
      assert l1 == f"opt_te_1530_({CUSTOM_LABEL})_1_o2", l1
      return cte
  
  
  def test_label_fiber_single_custom(num_regression, check=True):
      c = gf.components.straight(length=3, cross_section=cross_section)
      assert len(c.labels) == 0
  
      cte = gf.routing.add_fiber_single(
          component=c,
          with_loopback=True,
          component_name=CUSTOM_LABEL,
          cross_section=cross_section,
      )
      assert len(cte.labels) == 4
      labels = {
          label.text: np.array(
              [
                  label.position[0],
                  label.position[1],
                  label.layer,
              ]
          )
          for label in cte.labels
      }
      if check and labels:
          num_regression.check(labels)
      else:
          for key in labels:
              print(key)
      return cte
  
  
  if __name__ == "__main__":
      c = test_label_fiber_array_custom()
      # c = test_label_fiber_single_custom(None, check=False)
      c.show(show_ports=True)
  
      # c = gf.components.straight()
      # assert len(c.labels) == 0
  
      # c = gf.routing.add_fiber_array(component=c, with_loopback=True)
      # print(len(c.labels))
      # c.show(show_ports=True)
  
new_contents: import numpy as np
  
  import gdsfactory as gf
  from gdsfactory.component import Component
  from gdsfactory.cross_section import cross_section
  
  LENGTH = 0.5
  CELL_NAME = "straight_L500n"
  CUSTOM_LABEL = "straight_cband"
  
  
  def test_label_fiber_array_custom(length=LENGTH, cell_name=CELL_NAME) -> Component:
      c = gf.components.straight(length=LENGTH, cross_section=cross_section)
  
      assert len(c.labels) == 0, len(c.labels)
  
      cte = gf.routing.add_fiber_array(
          component=c,
          with_loopback=False,
          component_name=CUSTOM_LABEL,
          cross_section=cross_section,
      )
      assert len(cte.labels) == 2, len(cte.labels)
      l0 = cte.labels[0].text
      l1 = cte.labels[1].text
  
      assert l0 == f"opt_te_1530_({CUSTOM_LABEL})_0_o1", l0
      assert l1 == f"opt_te_1530_({CUSTOM_LABEL})_1_o2", l1
      return cte
  
  
  def test_label_fiber_single_custom(num_regression, check=True):
      c = gf.components.straight(length=3, cross_section=cross_section)
      assert len(c.labels) == 0
  
      cte = gf.routing.add_fiber_single(
          component=c,
          with_loopback=True,
          component_name=CUSTOM_LABEL,
          cross_section=cross_section,
      )
      assert len(cte.labels) == 4
      labels = {
          label.text: np.array(
              [
                  label.origin[0],
                  label.origin[1],
                  label.layer,
              ]
          )
          for label in cte.labels
      }
      if check and labels:
          num_regression.check(labels)
      else:
          for key in labels:
              print(key)
      return cte
  
  
  if __name__ == "__main__":
      c = test_label_fiber_array_custom()
      # c = test_label_fiber_single_custom(None, check=False)
      c.show(show_ports=True)
  
      # c = gf.components.straight()
      # assert len(c.labels) == 0
  
      # c = gf.routing.add_fiber_array(component=c, with_loopback=True)
      # print(len(c.labels))
      # c.show(show_ports=True)
  
subject: fix test