text: """The tests for the notify file platform."""
  import os
  from unittest.mock import call, mock_open, patch
  
  import pytest
  
  import homeassistant.components.notify as notify
  from homeassistant.components.notify import ATTR_TITLE_DEFAULT
  from homeassistant.setup import async_setup_component
  import homeassistant.util.dt as dt_util
  
  from tests.common import assert_setup_component
  
  
  async def test_bad_config(hass):
      """Test set up the platform with bad/missing config."""
      config = {notify.DOMAIN: {"name": "test", "platform": "file"}}
      with assert_setup_component(0) as handle_config:
          assert await async_setup_component(hass, notify.DOMAIN, config)
      assert not handle_config[notify.DOMAIN]
  
  
  @pytest.mark.parametrize(
      "timestamp",
      [
          False,
          True,
      ],
  )
  async def test_notify_file(hass, timestamp):
      """Test the notify file output."""
      filename = "mock_file"
      message = "one, two, testing, testing"
      with assert_setup_component(1) as handle_config:
          assert await async_setup_component(
              hass,
              notify.DOMAIN,
              {
                  "notify": {
                      "name": "test",
                      "platform": "file",
                      "filename": filename,
                      "timestamp": timestamp,
                  }
              },
          )
      assert handle_config[notify.DOMAIN]
  
      m_open = mock_open()
      with patch("homeassistant.components.file.notify.open", m_open, create=True), patch(
          "homeassistant.components.file.notify.os.stat"
      ) as mock_st, patch("homeassistant.util.dt.utcnow", return_value=dt_util.utcnow()):
  
          mock_st.return_value.st_size = 0
          title = (
              f"{ATTR_TITLE_DEFAULT} notifications "
              f"(Log started: {dt_util.utcnow().isoformat()})\n{'-' * 80}\n"
          )
  
          await hass.services.async_call(
              "notify", "test", {"message": message}, blocking=True
          )
  
          full_filename = os.path.join(hass.config.path(), filename)
          assert m_open.call_count == 1
          assert m_open.call_args == call(full_filename, "a")
  
          assert m_open.return_value.write.call_count == 2
          if not timestamp:
              assert m_open.return_value.write.call_args_list == [
                  call(title),
                  call(f"{message}\n"),
              ]
          else:
              assert m_open.return_value.write.call_args_list == [
                  call(title),
                  call(f"{dt_util.utcnow().isoformat()} {message}\n"),
              ]
  