text: """
  Tests for plugin loading via PCA
  """
  from nose.tools import raises
  from unittest import TestCase
  from pyutilib.component.core import PluginGlobals
  from pylons import config
  
  import ckan.logic as logic
  import ckan.authz as authz
  import ckan.plugins as plugins
  from ckan.plugins.core import find_system_plugins
  from ckan.lib.create_test_data import CreateTestData
  
  
  def _make_calls(*args):
      out = []
      for arg in args:
          out.append(((arg,), {}))
      return out
  
  
  class IFoo(plugins.Interface):
      pass
  
  class IBar(plugins.Interface):
      pass
  
  class FooImpl(object):
      plugins.implements(IFoo)
  
  class BarImpl(object):
      plugins.implements(IBar)
  
  class FooBarImpl(object):
      plugins.implements(IFoo)
      plugins.implements(IBar)
  
  class TestInterface(TestCase):
  
      def test_implemented_by(self):
          assert IFoo.implemented_by(FooImpl)
          assert IFoo.implemented_by(FooBarImpl)
          assert not IFoo.implemented_by(BarImpl)
  
      @raises(TypeError)
      def test_implemented_by_raises_exception_on_instances(self):
          assert not IFoo.implemented_by(FooImpl())
  
      def test_provided_by(self):
          assert IFoo.provided_by(FooImpl())
          assert IFoo.provided_by(FooBarImpl())
          assert not IFoo.provided_by(BarImpl())
  
  class TestIPluginObserverPlugin(object):
  
  
      @classmethod
      def setup(cls):
          cls.observer = plugins.load('test_observer_plugin')
  
      @classmethod
      def teardown(cls):
          plugins.unload('test_observer_plugin')
  
      def test_notified_on_load(self):
  
          observer = self.observer
          observer.reset_calls()
          with plugins.use_plugin('action_plugin') as action:
              assert observer.before_load.calls == _make_calls(action), observer.before_load.calls
              assert observer.after_load.calls == _make_calls(action), observer.after_load.calls
              assert observer.before_unload.calls == []
              assert observer.after_unload.calls == []
  
      def test_notified_on_unload(self):
  
          with plugins.use_plugin('action_plugin') as action:
              observer = self.observer
              observer.reset_calls()
          assert observer.before_load.calls == []
          assert observer.after_load.calls == []
          assert observer.before_unload.calls == _make_calls(action)
          assert observer.after_unload.calls == _make_calls(action)
  
  class TestPlugins(object):
  
  
      def test_plugins_load(self):
  
          config_plugins = config['ckan.plugins']
          config['ckan.plugins'] = 'mapper_plugin routes_plugin'
          plugins.load_all(config)
  
          # synchronous_search automatically gets loaded
          current_plugins = set([plugins.get_plugin(p) for p in ['mapper_plugin', 'routes_plugin', 'synchronous_search'] + find_system_plugins()])
          assert PluginGlobals.env().services == current_plugins
          # cleanup
          config['ckan.plugins'] = config_plugins
          plugins.load_all(config)
  
      def test_only_configured_plugins_loaded(self):
          with plugins.use_plugin('mapper_plugin') as p:
              # MapperPlugin should be loaded as it is listed in
              assert p in plugins.PluginImplementations(plugins.IMapper)
              # MapperPlugin2 and RoutesPlugin should NOT be loaded
              assert len(plugins.PluginImplementations(plugins.IMapper)) == 1
  
      def test_plugin_loading_order(self):
          """
          Check that plugins are loaded in the order specified in the config
          """
          config_plugins = config['ckan.plugins']
          config['ckan.plugins'] = 'test_observer_plugin mapper_plugin mapper_plugin2'
          plugins.load_all(config)
  
          observerplugin = plugins.get_plugin('test_observer_plugin')
  
          expected_order = _make_calls(plugins.get_plugin('mapper_plugin'),
                                       plugins.get_plugin('mapper_plugin2'))
  
          assert observerplugin.before_load.calls[:2] == expected_order
          expected_order = _make_calls(plugins.get_plugin('test_observer_plugin'),
                                       plugins.get_plugin('mapper_plugin'),
                                       plugins.get_plugin('mapper_plugin2'))
          assert observerplugin.after_load.calls[:3] == expected_order
  
          config['ckan.plugins'] = 'test_observer_plugin mapper_plugin2 mapper_plugin'
          plugins.load_all(config)
  
          expected_order = _make_calls(plugins.get_plugin('mapper_plugin2'),
                                       plugins.get_plugin('mapper_plugin'))
          assert observerplugin.before_load.calls[:2] == expected_order
          expected_order = _make_calls(plugins.get_plugin('test_observer_plugin'),
                                       plugins.get_plugin('mapper_plugin2'),
                                       plugins.get_plugin('mapper_plugin'))
          assert observerplugin.after_load.calls[:3] == expected_order
          # cleanup
          config['ckan.plugins'] = config_plugins
          plugins.load_all(config)
  
      def test_mapper_plugin_fired(self):
          with plugins.use_plugin('mapper_plugin') as mapper_plugin:
              CreateTestData.create_arbitrary([{'name':u'testpkg'}])
              # remove this data
              CreateTestData.delete()
              assert len(mapper_plugin.added) == 1
              assert mapper_plugin.added[0].name == 'testpkg'
  
      def test_routes_plugin_fired(self):
          with plugins.use_plugin('routes_plugin'):
              routes_plugin = PluginGlobals.env_registry['pca'].plugin_registry['RoutesPlugin'].__instance__
              assert routes_plugin.calls_made == ['before_map', 'after_map'], \
                     routes_plugin.calls_made
  
  
      def test_action_plugin_override(self):
          status_show_original = logic.get_action('status_show')(None, {})
          with plugins.use_plugin('action_plugin'):
              assert logic.get_action('status_show')(None, {}) != status_show_original
          assert logic.get_action('status_show')(None, {}) == status_show_original
  
      def test_auth_plugin_override(self):
          package_list_original = authz.is_authorized('package_list', {})
          with plugins.use_plugin('auth_plugin'):
              assert authz.is_authorized('package_list', {}) != package_list_original
          assert authz.is_authorized('package_list', {}) == package_list_original
  
      @raises(plugins.PluginNotFoundException)
      def test_inexistent_plugin_loading(self):
          plugins.load('inexistent-plugin')
  