old_contents: #
  # This file is part of the PyMeasure package.
  #
  # Copyright (c) 2013-2020 PyMeasure Developers
  #
  # Permission is hereby granted, free of charge, to any person obtaining a copy
  # of this software and associated documentation files (the "Software"), to deal
  # in the Software without restriction, including without limitation the rights
  # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  # copies of the Software, and to permit persons to whom the Software is
  # furnished to do so, subject to the following conditions:
  #
  # The above copyright notice and this permission notice shall be included in
  # all copies or substantial portions of the Software.
  #
  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  # THE SOFTWARE.
  #
  from pytest import approx
  
  from pymeasure.adapters import VISAAdapter
  from pymeasure.instruments import Instrument
  
  
  def test_visa_version():
      assert VISAAdapter.has_supported_version()
  
  
  def test_correct_visa_kwarg():
      """Confirm that the query_delay kwargs gets passed through to the VISA connection."""
      instr = Instrument(adapter='ASRL1::INSTR', name='delayed', query_delay=0.5, visa_library='@sim')
      assert instr.adapter.connection.query_delay == approx(0.5)
  
new_contents: #
  # This file is part of the PyMeasure package.
  #
  # Copyright (c) 2013-2020 PyMeasure Developers
  #
  # Permission is hereby granted, free of charge, to any person obtaining a copy
  # of this software and associated documentation files (the "Software"), to deal
  # in the Software without restriction, including without limitation the rights
  # to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
  # copies of the Software, and to permit persons to whom the Software is
  # furnished to do so, subject to the following conditions:
  #
  # The above copyright notice and this permission notice shall be included in
  # all copies or substantial portions of the Software.
  #
  # THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
  # IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
  # FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
  # AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
  # LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
  # OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
  # THE SOFTWARE.
  #
  import importlib.util
  
  import pytest
  from pytest import approx
  
  from pymeasure.adapters import VISAAdapter
  from pymeasure.instruments import Instrument
  
  pyvisa_sim_installed = bool(importlib.util.find_spec('pyvisa-sim'))
  
  
  def test_visa_version():
      assert VISAAdapter.has_supported_version()
  
  
  @pytest.mark.skipif(not pyvisa_sim_installed, reason='pyvisa-sim required but not found.')
  def test_correct_visa_kwarg():
      """Confirm that the query_delay kwargs gets passed through to the VISA connection."""
      instr = Instrument(adapter='ASRL1::INSTR', name='delayed', query_delay=0.5, visa_library='@sim')
      assert instr.adapter.connection.query_delay == approx(0.5)
  
subject: Add the instrument test only if pyvisa-sim is installed.