text: #!/usr/bin/env python
  import socket
  
  from django_prometheus.exports import SetupPrometheusEndpointOnPortRange
  from mock import ANY, MagicMock, call, patch
  
  
  @patch("django_prometheus.exports.HTTPServer")
  def test_port_range_available(httpserver_mock):
      """Test port range setup with an available port."""
      httpserver_mock.side_effect = [socket.error, MagicMock()]
      port_range = [8000, 8001]
      port_chosen = SetupPrometheusEndpointOnPortRange(port_range)
      assert port_chosen in port_range
  
      expected_calls = [call(("", 8000), ANY), call(("", 8001), ANY)]
      assert httpserver_mock.mock_calls == expected_calls
  
  
  @patch("django_prometheus.exports.HTTPServer")
  def test_port_range_unavailable(httpserver_mock):
      """Test port range setup with no available ports."""
      httpserver_mock.side_effect = [socket.error, socket.error]
      port_range = [8000, 8001]
      port_chosen = SetupPrometheusEndpointOnPortRange(port_range)
  
      expected_calls = [call(("", 8000), ANY), call(("", 8001), ANY)]
      assert httpserver_mock.mock_calls == expected_calls
      assert port_chosen is None
  