Removing unused lazy property.

Author: dhermes

gcloud/_helpers.py

@@ -95,49 +95,6 @@ def _ensure_tuple_or_list(arg_name, tuple_or_list):
     return list(tuple_or_list)
 
 
-class _LazyProperty(object):
-    """Descriptor for lazy loaded property.
-
-    This follows the reify pattern: lazy evaluation and then replacement
-    after evaluation.
-
-    :type name: string
-    :param name: The name of the attribute / property being evaluated.
-
-    :type deferred_callable: callable that takes no arguments
-    :param deferred_callable: The function / method used to evaluate the
-                              property.
-    """
-
-    def __init__(self, name, deferred_callable):
-        self._name = name
-        self._deferred_callable = deferred_callable
-
-    def __get__(self, obj, objtype):
-        if obj is None:
-            return self
-
-        setattr(obj, self._name, self._deferred_callable())
-        return getattr(obj, self._name)
-
-
-def _lazy_property_deco(deferred_callable):
-    """Decorator a method to create a :class:`_LazyProperty`.
-
-    :type deferred_callable: callable that takes no arguments
-    :param deferred_callable: The function / method used to evaluate the
-                              property.
-
-    :rtype: :class:`_LazyProperty`.
-    :returns: A lazy property which defers the deferred_callable.
-    """
-    if isinstance(deferred_callable, staticmethod):
-        # H/T: http://stackoverflow.com/a/9527450/1068170
-        #      For Python2.7+ deferred_callable.__func__ would suffice.
-        deferred_callable = deferred_callable.__get__(True)
-    return _LazyProperty(deferred_callable.__name__, deferred_callable)
-
-
 def _app_engine_id():
     """Gets the App Engine application ID if it can be inferred.
 
@@ -211,44 +168,3 @@ def _determine_default_project(project=None):
         project = _get_production_project()
 
     return project
-
-
-def set_default_project(project=None):
-    """Set default project either explicitly or implicitly as fall-back.
-
-    :type project: string
-    :param project: Optional. The project name to use as default.
-
-    :raises: :class:`EnvironmentError` if no project was found.
-    """
-    project = _determine_default_project(project=project)
-    if project is not None:
-        _DEFAULTS.project = project
-    else:
-        raise EnvironmentError('No project could be inferred.')
-
-
-class _DefaultsContainer(object):
-    """Container for defaults.
-
-    :type project: string
-    :param project: Persistent implied project from environment.
-
-    :type implicit: boolean
-    :param implicit: if False, assign the instance's ``project`` attribute
-                     unconditionally;  otherwise, assign it only if the
-                     value is not None.
-    """
-
-    @_lazy_property_deco
-    @staticmethod
-    def project():
-        """Return the implicit default project."""
-        return _determine_default_project()
-
-    def __init__(self, project=None, implicit=False):
-        if project is not None or not implicit:
-            self.project = project
-
-
-_DEFAULTS = _DefaultsContainer(implicit=True)

gcloud/_testing.py

@@ -14,9 +14,6 @@
 
 """Shared testing utilities."""
 
-from gcloud import _helpers
-from gcloud._helpers import _DefaultsContainer
-
 
 class _Monkey(object):
     # context-manager for replacing module names in the scope of a test.
@@ -33,12 +30,3 @@ def __enter__(self):
     def __exit__(self, exc_type, exc_val, exc_tb):
         for key, value in self.to_restore.items():
             setattr(self.module, key, value)
-
-
-def _setup_defaults(test_case, *args, **kwargs):
-    test_case._replaced_defaults = _helpers._DEFAULTS
-    _helpers._DEFAULTS = _DefaultsContainer(*args, **kwargs)
-
-
-def _tear_down_defaults(test_case):
-    _helpers._DEFAULTS = test_case._replaced_defaults

gcloud/test__helpers.py

@@ -70,58 +70,6 @@ def test_invalid_iterable(self):
             self._callFUT('ARGNAME', invalid_tuple_or_list)
 
 
-class Test__LazyProperty(unittest2.TestCase):
-
-    def _getTargetClass(self):
-        from gcloud._helpers import _LazyProperty
-        return _LazyProperty
-
-    def _makeOne(self, *args, **kwargs):
-        return self._getTargetClass()(*args, **kwargs)
-
-    def test_prop_on_class(self):
-        # Don't actually need a callable for ``method`` since
-        # __get__ will just return ``self`` in this test.
-        data_prop = self._makeOne('dataset_id', None)
-
-        class FakeEnv(object):
-            dataset_id = data_prop
-
-        self.assertTrue(FakeEnv.dataset_id is data_prop)
-
-    def test_prop_on_instance(self):
-        RESULT = object()
-        data_prop = self._makeOne('dataset_id', lambda: RESULT)
-
-        class FakeEnv(object):
-            dataset_id = data_prop
-
-        self.assertTrue(FakeEnv().dataset_id is RESULT)
-
-
-class Test__lazy_property_deco(unittest2.TestCase):
-
-    def _callFUT(self, deferred_callable):
-        from gcloud._helpers import _lazy_property_deco
-        return _lazy_property_deco(deferred_callable)
-
-    def test_on_function(self):
-        def test_func():
-            pass  # pragma: NO COVER never gets called
-
-        lazy_prop = self._callFUT(test_func)
-        self.assertTrue(lazy_prop._deferred_callable is test_func)
-        self.assertEqual(lazy_prop._name, 'test_func')
-
-    def test_on_staticmethod(self):
-        def test_func():
-            pass  # pragma: NO COVER never gets called
-
-        lazy_prop = self._callFUT(staticmethod(test_func))
-        self.assertTrue(lazy_prop._deferred_callable is test_func)
-        self.assertEqual(lazy_prop._name, 'test_func')
-
-
 class Test__app_engine_id(unittest2.TestCase):
 
     def _callFUT(self):
@@ -254,81 +202,6 @@ def test_prod(self):
         self.assertEqual(callers, ['prod_mock'])
 
 
-class Test_set_default_project(unittest2.TestCase):
-
-    def setUp(self):
-        from gcloud._testing import _setup_defaults
-        _setup_defaults(self)
-
-    def tearDown(self):
-        from gcloud._testing import _tear_down_defaults
-        _tear_down_defaults(self)
-
-    def _callFUT(self, project=None):
-        from gcloud._helpers import set_default_project
-        return set_default_project(project=project)
-
-    def test_raises(self):
-        from gcloud._testing import _Monkey
-        from gcloud import _helpers
-        _called_project = []
-
-        def mock_determine(project):
-            _called_project.append(project)
-            return None
-
-        with _Monkey(_helpers, _determine_default_project=mock_determine):
-            self.assertRaises(EnvironmentError, self._callFUT)
-
-        self.assertEqual(_called_project, [None])
-
-    def test_set_correctly(self):
-        from gcloud._testing import _Monkey
-        from gcloud import _helpers
-
-        self.assertEqual(_helpers._DEFAULTS.project, None)
-
-        PROJECT = object()
-        _called_project = []
-
-        def mock_determine(project):
-            _called_project.append(project)
-            return PROJECT
-
-        with _Monkey(_helpers,
-                     _determine_default_project=mock_determine):
-            self._callFUT()
-
-        self.assertEqual(_helpers._DEFAULTS.project, PROJECT)
-        self.assertEqual(_called_project, [None])
-
-
-class Test_lazy_loading(unittest2.TestCase):
-
-    def setUp(self):
-        from gcloud._testing import _setup_defaults
-        _setup_defaults(self, implicit=True)
-
-    def tearDown(self):
-        from gcloud._testing import _tear_down_defaults
-        _tear_down_defaults(self)
-
-    def test_descriptor_for_project(self):
-        from gcloud._testing import _Monkey
-        from gcloud import _helpers
-
-        self.assertFalse('project' in _helpers._DEFAULTS.__dict__)
-
-        DEFAULT = object()
-
-        with _Monkey(_helpers,
-                     _determine_default_project=lambda: DEFAULT):
-            lazy_loaded = _helpers._DEFAULTS.project
-
-        self.assertEqual(lazy_loaded, DEFAULT)
-        self.assertTrue('project' in _helpers._DEFAULTS.__dict__)
-
-
 class _AppIdentity(object):
 
     def __init__(self, app_id):