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.
  #
  import importlib.util
  
  import pytest
  from pytest import approx
  
  from pymeasure.adapters import VISAAdapter
  from pymeasure.instruments import Instrument
  
  SIM_RESOURCE = 'ASRL1::INSTR'
  
  is_pyvisa_sim_installed = bool(importlib.util.find_spec('pyvisa_sim'))
  if not is_pyvisa_sim_installed:
      pytest.skip('PyVISA tests require the pyvisa-sim library', allow_module_level=True)
  
  
  def make_visa_adapter(**kwargs):
      return VISAAdapter(SIM_RESOURCE, visa_library='@sim', **kwargs)
  
  
  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=SIM_RESOURCE, name='delayed', query_delay=0.5, visa_library='@sim')
      assert instr.adapter.connection.query_delay == approx(0.5)
  
  
  def test_visa_adapter():
      adapter = make_visa_adapter()
      assert repr(adapter) == "<VISAAdapter(resource='ASRL1::INSTR')>"
  
      adapter.ask("?IDN") == "LSG Serial #1234\n"
  
      adapter.write("?IDN")
      assert adapter.read() == "LSG Serial #1234\n"
  
  
  def test_visa_adapter_ask_values():
      adapter = make_visa_adapter()
      assert adapter.ask_values("?FREQ", separator=",") == [100]
  
  
  def test_visa_adapter_write_binary_values():
      adapter = make_visa_adapter()
      adapter.write_binary_values("!OUT", [1], datatype='B')
  
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
  
  SIM_RESOURCE = 'ASRL1::INSTR'
  
  is_pyvisa_sim_installed = bool(importlib.util.find_spec('pyvisa_sim'))
  if not is_pyvisa_sim_installed:
      pytest.skip('PyVISA tests require the pyvisa-sim library', allow_module_level=True)
  
  
  def make_visa_adapter(**kwargs):
      return VISAAdapter(SIM_RESOURCE, visa_library='@sim', **kwargs)
  
  
  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=SIM_RESOURCE, name='delayed', query_delay=0.5, visa_library='@sim')
      assert instr.adapter.connection.query_delay == approx(0.5)
  
  
  def test_visa_adapter():
      adapter = make_visa_adapter()
      assert repr(adapter) == "<VISAAdapter(resource='ASRL1::INSTR')>"
  
      assert adapter.ask("?IDN") == "LSG Serial #1234\n"
  
      adapter.write("?IDN")
      assert adapter.read() == "LSG Serial #1234\n"
  
  
  def test_visa_adapter_ask_values():
      adapter = make_visa_adapter()
      assert adapter.ask_values("?FREQ", separator=",") == [100]
  
  
  def test_visa_adapter_write_binary_values():
      adapter = make_visa_adapter()
      adapter.write_binary_values("!OUT", [1], datatype='B')
  
subject: Fix test assert.