code: def test_DtaleFlask():
      from dtale.app import DtaleFlask, REAPER_TIMEOUT
  
      with ExitStack() as stack:
          mock_run = stack.enter_context(
              mock.patch("flask.Flask.run", mock.Mock())
          )
          stack.enter_context(
              mock.patch(
                  "socket.gethostname", mock.Mock(return_value="test")
              )
          )
          mock_timer = stack.enter_context(
              mock.patch("dtale.app.Timer")
          )
  
          tmp = DtaleFlask(
              "dtale", static_url_path="", url="http://test:9999"
          )
          tmp.run(port="9999")
  
          assert tmp.reaper_on
          assert tmp.shutdown_url == "http://test:9999/shutdown"
          mock_timer.assert_called_once()
          args, _ = mock_timer.call_args
          assert args[0] == REAPER_TIMEOUT
          mock_run.assert_called_once()
          assert tmp.reaper is not None
          timer_instance = mock_timer.return_value
          timer_instance.start.assert_called_once()
  
          tmp.clear_reaper()
          timer_instance.cancel.assert_called_once()
  
      with ExitStack() as stack:
          mock_run = stack.enter_context(
              mock.patch("flask.Flask.run", mock.Mock())
          )
          stack.enter_context(
              mock.patch(
                  "socket.gethostname", mock.Mock(return_value="test")
              )
          )
          mock_timer = stack.enter_context(
              mock.patch("dtale.app.Timer", mock.Mock())
          )
  
          tmp = DtaleFlask("dtale", static_url_path="", reaper_on=False)
          tmp.run(port="9999")
  
          mock_run.assert_called_once()
          assert not tmp.reaper_on
          mock_timer.assert_not_called()
  
      with ExitStack() as stack:
          mock_run = stack.enter_context(
              mock.patch("flask.Flask.run", mock.Mock())
          )
          stack.enter_context(
              mock.patch(
                  "socket.gethostname", mock.Mock(return_value="test")
              )
          )
          mock_timer = stack.enter_context(
              mock.patch("dtale.app.Timer", mock.Mock())
          )
  
          tmp = DtaleFlask("dtale", static_url_path="")
          tmp.run(debug=True, port="9999")
  
          mock_run.assert_called_once()
          assert not tmp.reaper_on
          mock_timer.assert_not_called()
  
      with ExitStack() as stack:
          stack.enter_context(
              mock.patch(
                  "socket.gethostname", mock.Mock(return_value="test")
              )
          )
          tmp = DtaleFlask(
              "dtale",
              static_url_path="",
              url="http://test:9999",
              app_root="/test_route/",
          )
          assert (
              tmp.url_for("static", "test_path")
              == "/test_route/test_path"
          )
          assert (
              tmp.url_for("static", "test_path", filename="test_file")
              == "/test_route/test_file"
          )
  
imports: import getpass
  from collections import namedtuple
  from flask import Flask
  import mock
  import numpy
  import os
  import pandas
  import pytest
  from tests import ExitStack, pdt
label_desc: Use image node_id 7 for calling a global function with example usage: test_DtaleFlask() without return types