old_contents: """Tests for ``xentica.core.mixins`` module."""
  import unittest
  
  from xentica.core.mixins import BscaDetectorMixin
  from xentica.core.exceptions import XenticaException
  
  
  class TestBscaDetector(unittest.TestCase):
      """Tests for ``BscaDetectorMixin`` class."""
  
      def test_not_detected(self):
          """Test exception is raised if BSCA not detected."""
          class Dummy(BscaDetectorMixin):
              pass
          with self.assertRaises(XenticaException):
              dummy = Dummy()
              dummy._bsca
  
new_contents: """Tests for ``xentica.core.mixins`` module."""
  import unittest
  
  from xentica.core.mixins import BscaDetectorMixin
  from xentica.core.exceptions import XenticaException
  
  
  class TestBscaDetector(unittest.TestCase):
      """Tests for ``BscaDetectorMixin`` class."""
  
      def test_not_detected(self):
          """Test exception is raised if BSCA not detected."""
          class Dummy(BscaDetectorMixin):
              """Dummy class for BSCA detecting test."""
              @property
              def bsca(self):
                  """Get BSCA class."""
                  return self._bsca
          with self.assertRaises(XenticaException):
              dummy = Dummy()
              bsca = dummy.bsca
              self.assertEqual(bsca.__name__, "BSCA", "Wrong class detected.")
  
subject: Fix pylint issues in tests.core.test_mixins (#30)