old_contents: from __future__ import unicode_literals, division, absolute_import
  
  from flexget.plugin import get_plugin_by_name, get_plugins
  from flexget.plugins.parsers import plugin_parsing
  
  
  class TestParsingAPI(object):
      def test_all_types_handled(self):
          declared_types = set(plugin_parsing.PARSER_TYPES)
          method_handlers = set(m[6:] for m in dir(get_plugin_by_name('parsing').instance) if m.startswith('parse_'))
          assert set(declared_types) == set(method_handlers), \
              'declared parser types: %s, handled types: %s' % (declared_types, method_handlers)
  
      def test_parsing_plugins_have_parse_methods(self):
          for parser_type in plugin_parsing.PARSER_TYPES:
              for plugin in get_plugins(group='%s_parser' % parser_type):
                  assert hasattr(plugin.instance, 'parse_%s' % parser_type), \
                      '{type} parsing plugin {name} has no parse_{type} method'.format(type=parser_type, name=plugin.name)
  
new_contents: from __future__ import unicode_literals, division, absolute_import
  
  from flexget.plugin import get_plugin_by_name, get_plugins
  from flexget.plugins.parsers import plugin_parsing
  
  
  class TestParsingAPI(object):
      def test_all_types_handled(self):
          declared_types = set(plugin_parsing.PARSER_TYPES)
          method_handlers = set(m[6:] for m in dir(get_plugin_by_name('parsing').instance) if m.startswith('parse_'))
          assert set(declared_types) == set(method_handlers), \
              'declared parser types: %s, handled types: %s' % (declared_types, method_handlers)
  
      def test_parsing_plugins_have_parse_methods(self):
          for parser_type in plugin_parsing.PARSER_TYPES:
              for plugin in get_plugins(group='%s_parser' % parser_type):
                  assert hasattr(plugin.instance, 'parse_%s' % parser_type), \
                      '{type} parsing plugin {name} has no parse_{type} method'.format(type=parser_type, name=plugin.name)
  
  
  class TestTaskParsing(object):
      config = """
          tasks:
            explicit_parser:
              parsing:
                movie: guessit
                series: guessit
      """
      def test_selected_parser_cleared(self, manager, execute_task):
          # make sure when a non-default parser is installed on a task, it doesn't affect other tasks
          execute_task('explicit_parser')
          assert not plugin_parsing.selected_parsers
  
subject: Add a test to verify plugin_parsing clears selected parsers after task