old_contents: from rich.text import Text
  import pytest
  
  from rich.errors import NotRenderableError
  from rich.console import Console
  from rich.measure import Measurement
  
  
  def test_span():
      measurement = Measurement(10, 100)
      assert measurement.span == 90
  
  
  def test_no_renderable():
      console = Console()
      text = Text()
  
      with pytest.raises(NotRenderableError):
          Measurement.get(console, None, console.width)
  
  
  def test_null_get():
      # Test negative console.width passed into get method
      assert Measurement.get(Console(width=-1), None) == Measurement(0, 0)
      # Test negative max_width passed into get method
      assert Measurement.get(Console(), None, -1) == Measurement(0, 0)
  
  
  if __name__ == "__main__":
      test_null_get()
new_contents: from rich.text import Text
  import pytest
  
  from rich.errors import NotRenderableError
  from rich.console import Console
  from rich.measure import Measurement, measure_renderables
  
  
  def test_span():
      measurement = Measurement(10, 100)
      assert measurement.span == 90
  
  
  def test_no_renderable():
      console = Console()
      text = Text()
  
      with pytest.raises(NotRenderableError):
          Measurement.get(console, None, console.width)
  
  
  def test_null_get():
      # Test negative console.width passed into get method
      assert Measurement.get(Console(width=-1), None) == Measurement(0, 0)
      # Test negative max_width passed into get method
      assert Measurement.get(Console(), None, -1) == Measurement(0, 0)
  
  
  def test_measure_renderables():
      # Test measure_renderables returning a null Measurement object
      assert measure_renderables(Console(), None, None) == Measurement(0, 0)
      # Test measure_renderables returning a valid Measurement object
      assert measure_renderables(Console(width=1), ["test"], 1) == Measurement(1, 1)
  
subject: Add `test_measure_renderables`