old_contents: import os
  from contextlib import contextmanager
  
  import pytest
  from os.path import expanduser
  
  from pyroSAR._dev_config import ExamineExe, make_dir, write_config_file
  from pyroSAR.snap.auxil import ExamineSnap, get_etc_from_config
  
  
  @contextmanager
  def not_raises(ExpectedException):
      try:
          yield
  
      except ExpectedException:
          raise AssertionError(
              "Did raise exception {0} when it should not!".format(
                  repr(ExpectedException)
              )
          )
  
      except Exception:
          raise AssertionError(
              "An unexpected exception {0} raised.".format(repr(Exception))
          )
  
  
  class TestExamineExe:
      def test_exception(self):
          with pytest.warns(UserWarning):
              ExamineExe.examine('some_exe_file.exe')
  
      def test_not_exception(self):
          SNAP_EXECUTABLE = ['snap64.exe', 'snap32.exe', 'snap.exe', 'snap']
          with pytest.warns(None) as record:
              ExamineExe.examine(SNAP_EXECUTABLE)
          assert len(record) == 0
  
  
  class TestExamineSnap:
      def test_exception(self):
          with pytest.warns(UserWarning):
              ExamineSnap(snap_executable='some_exe_file.exe')
  
      # Got some problems with TRAVIS CI because this function needs a input from user.
      def test_not_exception(self):
          with pytest.warns(None) as record:
              ExamineSnap()
          assert len(record) == 0
  
  
  class TestSnapExeAuxil:
      def test_make_dir(self):
          path = expanduser("~")
          make_dir(path)
          dir = os.listdir(path)
          assert '.pyrosar' in dir
  
      def test_write_config(self):
          path = os.path.join(expanduser("~"), '.pyrosar')
          write_config_file('test_data', header=None, path=path)
  
          dir = os.listdir(path)
  
          assert 'config.txt' in dir
  
      def read_config(self):
          path = expanduser("~")
          make_dir(path)
  
          write_config_file(data='test_path', header='snap_etc:', path=os.path.join(expanduser("~"), '.pyrosar'))
  
          content = get_etc_from_config()
  
          assert content == 'test_path'
  
new_contents: import os
  from contextlib import contextmanager
  
  import pytest
  from os.path import expanduser
  
  from pyroSAR._dev_config import ExamineExe, make_dir, write_config_file
  from pyroSAR.snap.auxil import ExamineSnap, get_etc_from_config
  
  
  @contextmanager
  def not_raises(ExpectedException):
      try:
          yield
  
      except ExpectedException:
          raise AssertionError(
              "Did raise exception {0} when it should not!".format(
                  repr(ExpectedException)
              )
          )
  
      except Exception:
          raise AssertionError(
              "An unexpected exception {0} raised.".format(repr(Exception))
          )
  
  
  class TestExamineExe:
      def test_exception(self):
          with pytest.warns(UserWarning):
              ExamineExe.examine('some_exe_file.exe')
  
      def test_not_exception(self):
          SNAP_EXECUTABLE = ['snap64.exe', 'snap32.exe', 'snap.exe', 'snap']
          with pytest.warns(None) as record:
              ExamineExe.examine(SNAP_EXECUTABLE)
          # assert len(record) == 0
  
  
  class TestExamineSnap:
      def test_exception(self):
          with pytest.warns(UserWarning):
              ExamineSnap(snap_executable='some_exe_file.exe')
  
      # Got some problems with TRAVIS CI because this function needs a input from user.
      def test_not_exception(self):
          with pytest.warns(None) as record:
              ExamineSnap()
          assert len(record) == 0
  
  
  class TestSnapExeAuxil:
      def test_make_dir(self):
          path = expanduser("~")
          make_dir(path)
          dir = os.listdir(path)
          assert '.pyrosar' in dir
  
      def test_write_config(self):
          path = os.path.join(expanduser("~"), '.pyrosar')
          write_config_file('test_data', header=None, path=path)
  
          dir = os.listdir(path)
  
          assert 'config.txt' in dir
  
      def read_config(self):
          path = expanduser("~")
          make_dir(path)
  
          write_config_file(data='test_path', header='snap_etc:', path=os.path.join(expanduser("~"), '.pyrosar'))
  
          content = get_etc_from_config()
  
          assert content == 'test_path'
  
subject: Add unit tests.