move tests out of the package

1 files changed, 945 insertions, 0 deletions

diff --git a/tests/test_config/test_assets.py b/tests/test_config/test_assets.py
new file mode 100644
index 000000000..842c73da6
--- /dev/null
+++ b/tests/test_config/test_assets.py
@@ -0,0 +1,945 @@
+import os.path
+import unittest
+from pyramid.testing import cleanUp
+
+# we use this folder
+here = os.path.dirname(os.path.abspath(__file__))
+
+class TestAssetsConfiguratorMixin(unittest.TestCase):
+    def _makeOne(self, *arg, **kw):
+        from pyramid.config import Configurator
+        config = Configurator(*arg, **kw)
+        return config
+
+    def test_override_asset_samename(self):
+        from pyramid.exceptions import ConfigurationError
+        config = self._makeOne()
+        self.assertRaises(ConfigurationError, config.override_asset, 'a', 'a')
+
+    def test_override_asset_directory_with_file(self):
+        from pyramid.exceptions import ConfigurationError
+        config = self._makeOne()
+        self.assertRaises(ConfigurationError, config.override_asset,
+                          'a:foo/',
+                          'pyramid.tests.test_config.pkgs.asset:foo.pt')
+
+    def test_override_asset_file_with_directory(self):
+        from pyramid.exceptions import ConfigurationError
+        config = self._makeOne()
+        self.assertRaises(ConfigurationError, config.override_asset,
+                          'a:foo.pt',
+                          'pyramid.tests.test_config.pkgs.asset:templates/')
+
+    def test_override_asset_file_with_package(self):
+        from pyramid.exceptions import ConfigurationError
+        config = self._makeOne()
+        self.assertRaises(ConfigurationError, config.override_asset,
+                          'a:foo.pt',
+                          'pyramid.tests.test_config.pkgs.asset')
+
+    def test_override_asset_file_with_file(self):
+        from pyramid.config.assets import PackageAssetSource
+        config = self._makeOne(autocommit=True)
+        override = DummyUnderOverride()
+        config.override_asset(
+            'pyramid.tests.test_config.pkgs.asset:templates/foo.pt',
+            'pyramid.tests.test_config.pkgs.asset.subpackage:templates/bar.pt',
+            _override=override)
+        from pyramid.tests.test_config.pkgs import asset
+        from pyramid.tests.test_config.pkgs.asset import subpackage
+        self.assertEqual(override.package, asset)
+        self.assertEqual(override.path, 'templates/foo.pt')
+        source = override.source
+        self.assertTrue(isinstance(source, PackageAssetSource))
+        self.assertEqual(source.package, subpackage)
+        self.assertEqual(source.prefix, 'templates/bar.pt')
+
+        resource_name = ''
+        expected = os.path.join(here, 'pkgs', 'asset',
+                                'subpackage', 'templates', 'bar.pt')
+        self.assertEqual(override.source.get_filename(resource_name),
+                         expected)
+
+    def test_override_asset_package_with_package(self):
+        from pyramid.config.assets import PackageAssetSource
+        config = self._makeOne(autocommit=True)
+        override = DummyUnderOverride()
+        config.override_asset(
+            'pyramid.tests.test_config.pkgs.asset',
+            'pyramid.tests.test_config.pkgs.asset.subpackage',
+            _override=override)
+        from pyramid.tests.test_config.pkgs import asset
+        from pyramid.tests.test_config.pkgs.asset import subpackage
+        self.assertEqual(override.package, asset)
+        self.assertEqual(override.path, '')
+        source = override.source
+        self.assertTrue(isinstance(source, PackageAssetSource))
+        self.assertEqual(source.package, subpackage)
+        self.assertEqual(source.prefix, '')
+
+        resource_name = 'templates/bar.pt'
+        expected = os.path.join(here, 'pkgs', 'asset',
+                                'subpackage', 'templates', 'bar.pt')
+        self.assertEqual(override.source.get_filename(resource_name),
+                         expected)
+
+    def test_override_asset_directory_with_directory(self):
+        from pyramid.config.assets import PackageAssetSource
+        config = self._makeOne(autocommit=True)
+        override = DummyUnderOverride()
+        config.override_asset(
+            'pyramid.tests.test_config.pkgs.asset:templates/',
+            'pyramid.tests.test_config.pkgs.asset.subpackage:templates/',
+            _override=override)
+        from pyramid.tests.test_config.pkgs import asset
+        from pyramid.tests.test_config.pkgs.asset import subpackage
+        self.assertEqual(override.package, asset)
+        self.assertEqual(override.path, 'templates/')
+        source = override.source
+        self.assertTrue(isinstance(source, PackageAssetSource))
+        self.assertEqual(source.package, subpackage)
+        self.assertEqual(source.prefix, 'templates/')
+
+        resource_name = 'bar.pt'
+        expected = os.path.join(here, 'pkgs', 'asset',
+                                'subpackage', 'templates', 'bar.pt')
+        self.assertEqual(override.source.get_filename(resource_name),
+                         expected)
+
+    def test_override_asset_directory_with_package(self):
+        from pyramid.config.assets import PackageAssetSource
+        config = self._makeOne(autocommit=True)
+        override = DummyUnderOverride()
+        config.override_asset(
+            'pyramid.tests.test_config.pkgs.asset:templates/',
+            'pyramid.tests.test_config.pkgs.asset.subpackage',
+            _override=override)
+        from pyramid.tests.test_config.pkgs import asset
+        from pyramid.tests.test_config.pkgs.asset import subpackage
+        self.assertEqual(override.package, asset)
+        self.assertEqual(override.path, 'templates/')
+        source = override.source
+        self.assertTrue(isinstance(source, PackageAssetSource))
+        self.assertEqual(source.package, subpackage)
+        self.assertEqual(source.prefix, '')
+
+        resource_name = 'templates/bar.pt'
+        expected = os.path.join(here, 'pkgs', 'asset',
+                                'subpackage', 'templates', 'bar.pt')
+        self.assertEqual(override.source.get_filename(resource_name),
+                         expected)
+
+    def test_override_asset_package_with_directory(self):
+        from pyramid.config.assets import PackageAssetSource
+        config = self._makeOne(autocommit=True)
+        override = DummyUnderOverride()
+        config.override_asset(
+            'pyramid.tests.test_config.pkgs.asset',
+            'pyramid.tests.test_config.pkgs.asset.subpackage:templates/',
+            _override=override)
+        from pyramid.tests.test_config.pkgs import asset
+        from pyramid.tests.test_config.pkgs.asset import subpackage
+        self.assertEqual(override.package, asset)
+        self.assertEqual(override.path, '')
+        source = override.source
+        self.assertTrue(isinstance(source, PackageAssetSource))
+        self.assertEqual(source.package, subpackage)
+        self.assertEqual(source.prefix, 'templates/')
+
+        resource_name = 'bar.pt'
+        expected = os.path.join(here, 'pkgs', 'asset',
+                                'subpackage', 'templates', 'bar.pt')
+        self.assertEqual(override.source.get_filename(resource_name),
+                         expected)
+
+    def test_override_asset_directory_with_absfile(self):
+        from pyramid.exceptions import ConfigurationError
+        config = self._makeOne()
+        self.assertRaises(ConfigurationError, config.override_asset,
+                          'a:foo/',
+                          os.path.join(here, 'pkgs', 'asset', 'foo.pt'))
+
+    def test_override_asset_file_with_absdirectory(self):
+        from pyramid.exceptions import ConfigurationError
+        config = self._makeOne()
+        abspath = os.path.join(here, 'pkgs', 'asset', 'subpackage', 'templates')
+        self.assertRaises(ConfigurationError, config.override_asset,
+                          'a:foo.pt',
+                          abspath)
+
+    def test_override_asset_file_with_missing_abspath(self):
+        from pyramid.exceptions import ConfigurationError
+        config = self._makeOne()
+        self.assertRaises(ConfigurationError, config.override_asset,
+                          'a:foo.pt',
+                          os.path.join(here, 'wont_exist'))
+
+    def test_override_asset_file_with_absfile(self):
+        from pyramid.config.assets import FSAssetSource
+        config = self._makeOne(autocommit=True)
+        override = DummyUnderOverride()
+        abspath = os.path.join(here, 'pkgs', 'asset', 'subpackage',
+                               'templates', 'bar.pt')
+        config.override_asset(
+            'pyramid.tests.test_config.pkgs.asset:templates/foo.pt',
+            abspath,
+            _override=override)
+        from pyramid.tests.test_config.pkgs import asset
+        self.assertEqual(override.package, asset)
+        self.assertEqual(override.path, 'templates/foo.pt')
+        source = override.source
+        self.assertTrue(isinstance(source, FSAssetSource))
+        self.assertEqual(source.prefix, abspath)
+
+        resource_name = ''
+        expected = os.path.join(here, 'pkgs', 'asset',
+                                'subpackage', 'templates', 'bar.pt')
+        self.assertEqual(override.source.get_filename(resource_name),
+                         expected)
+
+    def test_override_asset_directory_with_absdirectory(self):
+        from pyramid.config.assets import FSAssetSource
+        config = self._makeOne(autocommit=True)
+        override = DummyUnderOverride()
+        abspath = os.path.join(here, 'pkgs', 'asset', 'subpackage', 'templates')
+        config.override_asset(
+            'pyramid.tests.test_config.pkgs.asset:templates/',
+            abspath,
+            _override=override)
+        from pyramid.tests.test_config.pkgs import asset
+        self.assertEqual(override.package, asset)
+        self.assertEqual(override.path, 'templates/')
+        source = override.source
+        self.assertTrue(isinstance(source, FSAssetSource))
+        self.assertEqual(source.prefix, abspath)
+
+        resource_name = 'bar.pt'
+        expected = os.path.join(here, 'pkgs', 'asset',
+                                'subpackage', 'templates', 'bar.pt')
+        self.assertEqual(override.source.get_filename(resource_name),
+                         expected)
+
+    def test_override_asset_package_with_absdirectory(self):
+        from pyramid.config.assets import FSAssetSource
+        config = self._makeOne(autocommit=True)
+        override = DummyUnderOverride()
+        abspath = os.path.join(here, 'pkgs', 'asset', 'subpackage', 'templates')
+        config.override_asset(
+            'pyramid.tests.test_config.pkgs.asset',
+            abspath,
+            _override=override)
+        from pyramid.tests.test_config.pkgs import asset
+        self.assertEqual(override.package, asset)
+        self.assertEqual(override.path, '')
+        source = override.source
+        self.assertTrue(isinstance(source, FSAssetSource))
+        self.assertEqual(source.prefix, abspath)
+
+        resource_name = 'bar.pt'
+        expected = os.path.join(here, 'pkgs', 'asset',
+                                'subpackage', 'templates', 'bar.pt')
+        self.assertEqual(override.source.get_filename(resource_name),
+                         expected)
+
+    def test__override_not_yet_registered(self):
+        from pyramid.interfaces import IPackageOverrides
+        package = DummyPackage('package')
+        source = DummyAssetSource()
+        config = self._makeOne()
+        config._override(package, 'path', source,
+                         PackageOverrides=DummyPackageOverrides)
+        overrides = config.registry.queryUtility(IPackageOverrides,
+                                                 name='package')
+        self.assertEqual(overrides.inserted, [('path', source)])
+        self.assertEqual(overrides.package, package)
+
+    def test__override_already_registered(self):
+        from pyramid.interfaces import IPackageOverrides
+        package = DummyPackage('package')
+        source = DummyAssetSource()
+        overrides = DummyPackageOverrides(package)
+        config = self._makeOne()
+        config.registry.registerUtility(overrides, IPackageOverrides,
+                                        name='package')
+        config._override(package, 'path', source,
+                         PackageOverrides=DummyPackageOverrides)
+        self.assertEqual(overrides.inserted, [('path', source)])
+        self.assertEqual(overrides.package, package)
+
+
+class TestOverrideProvider(unittest.TestCase):
+    def setUp(self):
+        cleanUp()
+
+    def tearDown(self):
+        cleanUp()
+
+    def _getTargetClass(self):
+        from pyramid.config.assets import OverrideProvider
+        return OverrideProvider
+
+    def _makeOne(self, module):
+        klass = self._getTargetClass()
+        return klass(module)
+
+    def _registerOverrides(self, overrides, name='pyramid.tests.test_config'):
+        from pyramid.interfaces import IPackageOverrides
+        from pyramid.threadlocal import get_current_registry
+        reg = get_current_registry()
+        reg.registerUtility(overrides, IPackageOverrides, name=name)
+
+    def test_get_resource_filename_no_overrides(self):
+        resource_name = 'test_assets.py'
+        import pyramid.tests.test_config
+        provider = self._makeOne(pyramid.tests.test_config)
+        expected = os.path.join(here, resource_name)
+        result = provider.get_resource_filename(None, resource_name)
+        self.assertEqual(result, expected)
+
+    def test_get_resource_stream_no_overrides(self):
+        resource_name = 'test_assets.py'
+        import pyramid.tests.test_config
+        provider = self._makeOne(pyramid.tests.test_config)
+        with provider.get_resource_stream(None, resource_name) as result:
+            _assertBody(result.read(), os.path.join(here, resource_name))
+
+    def test_get_resource_string_no_overrides(self):
+        resource_name = 'test_assets.py'
+        import pyramid.tests.test_config
+        provider = self._makeOne(pyramid.tests.test_config)
+        result = provider.get_resource_string(None, resource_name)
+        _assertBody(result, os.path.join(here, resource_name))
+
+    def test_has_resource_no_overrides(self):
+        resource_name = 'test_assets.py'
+        import pyramid.tests.test_config
+        provider = self._makeOne(pyramid.tests.test_config)
+        result = provider.has_resource(resource_name)
+        self.assertEqual(result, True)
+
+    def test_resource_isdir_no_overrides(self):
+        file_resource_name = 'test_assets.py'
+        directory_resource_name = 'files'
+        import pyramid.tests.test_config
+        provider = self._makeOne(pyramid.tests.test_config)
+        result = provider.resource_isdir(file_resource_name)
+        self.assertEqual(result, False)
+        result = provider.resource_isdir(directory_resource_name)
+        self.assertEqual(result, True)
+
+    def test_resource_listdir_no_overrides(self):
+        resource_name = 'files'
+        import pyramid.tests.test_config
+        provider = self._makeOne(pyramid.tests.test_config)
+        result = provider.resource_listdir(resource_name)
+        self.assertTrue(result)
+
+    def test_get_resource_filename_override_returns_None(self):
+        overrides = DummyOverrides(None)
+        self._registerOverrides(overrides)
+        resource_name = 'test_assets.py'
+        import pyramid.tests.test_config
+        provider = self._makeOne(pyramid.tests.test_config)
+        expected = os.path.join(here, resource_name)
+        result = provider.get_resource_filename(None, resource_name)
+        self.assertEqual(result, expected)
+        
+    def test_get_resource_stream_override_returns_None(self):
+        overrides = DummyOverrides(None)
+        self._registerOverrides(overrides)
+        resource_name = 'test_assets.py'
+        import pyramid.tests.test_config
+        provider = self._makeOne(pyramid.tests.test_config)
+        with provider.get_resource_stream(None, resource_name) as result:
+            _assertBody(result.read(), os.path.join(here, resource_name))
+
+    def test_get_resource_string_override_returns_None(self):
+        overrides = DummyOverrides(None)
+        self._registerOverrides(overrides)
+        resource_name = 'test_assets.py'
+        import pyramid.tests.test_config
+        provider = self._makeOne(pyramid.tests.test_config)
+        result = provider.get_resource_string(None, resource_name)
+        _assertBody(result, os.path.join(here, resource_name))
+
+    def test_has_resource_override_returns_None(self):
+        overrides = DummyOverrides(None)
+        self._registerOverrides(overrides)
+        resource_name = 'test_assets.py'
+        import pyramid.tests.test_config
+        provider = self._makeOne(pyramid.tests.test_config)
+        result = provider.has_resource(resource_name)
+        self.assertEqual(result, True)
+
+    def test_resource_isdir_override_returns_None(self):
+        overrides = DummyOverrides(None)
+        self._registerOverrides(overrides)
+        resource_name = 'files'
+        import pyramid.tests.test_config
+        provider = self._makeOne(pyramid.tests.test_config)
+        result = provider.resource_isdir(resource_name)
+        self.assertEqual(result, True)
+
+    def test_resource_listdir_override_returns_None(self):
+        overrides = DummyOverrides(None)
+        self._registerOverrides(overrides)
+        resource_name = 'files'
+        import pyramid.tests.test_config
+        provider = self._makeOne(pyramid.tests.test_config)
+        result = provider.resource_listdir(resource_name)
+        self.assertTrue(result)
+
+    def test_get_resource_filename_override_returns_value(self):
+        overrides = DummyOverrides('value')
+        import pyramid.tests.test_config
+        self._registerOverrides(overrides)
+        provider = self._makeOne(pyramid.tests.test_config)
+        result = provider.get_resource_filename(None, 'test_assets.py')
+        self.assertEqual(result, 'value')
+
+    def test_get_resource_stream_override_returns_value(self):
+        from io import BytesIO
+        overrides = DummyOverrides(BytesIO(b'value'))
+        import pyramid.tests.test_config
+        self._registerOverrides(overrides)
+        provider = self._makeOne(pyramid.tests.test_config)
+        with provider.get_resource_stream(None, 'test_assets.py') as stream:
+            self.assertEqual(stream.getvalue(), b'value')
+
+    def test_get_resource_string_override_returns_value(self):
+        overrides = DummyOverrides('value')
+        import pyramid.tests.test_config
+        self._registerOverrides(overrides)
+        provider = self._makeOne(pyramid.tests.test_config)
+        result = provider.get_resource_string(None, 'test_assets.py')
+        self.assertEqual(result, 'value')
+
+    def test_has_resource_override_returns_True(self):
+        overrides = DummyOverrides(True)
+        import pyramid.tests.test_config
+        self._registerOverrides(overrides)
+        provider = self._makeOne(pyramid.tests.test_config)
+        result = provider.has_resource('test_assets.py')
+        self.assertEqual(result, True)
+
+    def test_resource_isdir_override_returns_False(self):
+        overrides = DummyOverrides(False)
+        import pyramid.tests.test_config
+        self._registerOverrides(overrides)
+        provider = self._makeOne(pyramid.tests.test_config)
+        result = provider.resource_isdir('files')
+        self.assertEqual(result, False)
+
+    def test_resource_listdir_override_returns_values(self):
+        overrides = DummyOverrides(['a'])
+        import pyramid.tests.test_config
+        self._registerOverrides(overrides)
+        provider = self._makeOne(pyramid.tests.test_config)
+        result = provider.resource_listdir('files')
+        self.assertEqual(result, ['a'])
+
+class TestPackageOverrides(unittest.TestCase):
+    def _getTargetClass(self):
+        from pyramid.config.assets import PackageOverrides
+        return PackageOverrides
+
+    def _makeOne(self, package=None, pkg_resources=None):
+        if package is None:
+            package = DummyPackage('package')
+        klass = self._getTargetClass()
+        if pkg_resources is None:
+            pkg_resources = DummyPkgResources()
+        return klass(package, pkg_resources=pkg_resources)
+
+    def test_class_conforms_to_IPackageOverrides(self):
+        from zope.interface.verify import verifyClass
+        from pyramid.interfaces import IPackageOverrides
+        verifyClass(IPackageOverrides, self._getTargetClass())
+
+    def test_instance_conforms_to_IPackageOverrides(self):
+        from zope.interface.verify import verifyObject
+        from pyramid.interfaces import IPackageOverrides
+        verifyObject(IPackageOverrides, self._makeOne())
+
+    def test_class_conforms_to_IPEP302Loader(self):
+        from zope.interface.verify import verifyClass
+        from pyramid.interfaces import IPEP302Loader
+        verifyClass(IPEP302Loader, self._getTargetClass())
+
+    def test_instance_conforms_to_IPEP302Loader(self):
+        from zope.interface.verify import verifyObject
+        from pyramid.interfaces import IPEP302Loader
+        verifyObject(IPEP302Loader, self._makeOne())
+
+    def test_ctor_package_already_has_loader_of_different_type(self):
+        package = DummyPackage('package')
+        loader = package.__loader__ = DummyLoader()
+        po = self._makeOne(package)
+        self.assertTrue(package.__loader__ is po)
+        self.assertTrue(po.real_loader is loader)
+
+    def test_ctor_package_already_has_loader_of_same_type(self):
+        package = DummyPackage('package')
+        package.__loader__ = self._makeOne(package)
+        po = self._makeOne(package)
+        self.assertEqual(package.__loader__, po)
+
+    def test_ctor_sets_loader(self):
+        package = DummyPackage('package')
+        po = self._makeOne(package)
+        self.assertEqual(package.__loader__, po)
+
+    def test_ctor_registers_loader_type(self):
+        from pyramid.config.assets import OverrideProvider
+        dummy_pkg_resources = DummyPkgResources()
+        package = DummyPackage('package')
+        po = self._makeOne(package, dummy_pkg_resources)
+        self.assertEqual(dummy_pkg_resources.registered, [(po.__class__,
+                         OverrideProvider)])
+
+    def test_ctor_sets_local_state(self):
+        package = DummyPackage('package')
+        po = self._makeOne(package)
+        self.assertEqual(po.overrides, [])
+        self.assertEqual(po.overridden_package_name, 'package')
+
+    def test_insert_directory(self):
+        from pyramid.config.assets import DirectoryOverride
+        package = DummyPackage('package')
+        po = self._makeOne(package)
+        po.overrides = [None]
+        po.insert('foo/', DummyAssetSource())
+        self.assertEqual(len(po.overrides), 2)
+        override = po.overrides[0]
+        self.assertEqual(override.__class__, DirectoryOverride)
+
+    def test_insert_file(self):
+        from pyramid.config.assets import FileOverride
+        package = DummyPackage('package')
+        po = self._makeOne(package)
+        po.overrides = [None]
+        po.insert('foo.pt', DummyAssetSource())
+        self.assertEqual(len(po.overrides), 2)
+        override = po.overrides[0]
+        self.assertEqual(override.__class__, FileOverride)
+
+    def test_insert_emptystring(self):
+        # XXX is this a valid case for a directory?
+        from pyramid.config.assets import DirectoryOverride
+        package = DummyPackage('package')
+        po = self._makeOne(package)
+        po.overrides = [None]
+        source = DummyAssetSource()
+        po.insert('', source)
+        self.assertEqual(len(po.overrides), 2)
+        override = po.overrides[0]
+        self.assertEqual(override.__class__, DirectoryOverride)
+
+    def test_filtered_sources(self):
+        overrides = [ DummyOverride(None), DummyOverride('foo')]
+        package = DummyPackage('package')
+        po = self._makeOne(package)
+        po.overrides = overrides
+        self.assertEqual(list(po.filtered_sources('whatever')), ['foo'])
+
+    def test_get_filename(self):
+        source = DummyAssetSource(filename='foo.pt')
+        overrides = [ DummyOverride(None), DummyOverride((source, ''))]
+        package = DummyPackage('package')
+        po = self._makeOne(package)
+        po.overrides = overrides
+        result = po.get_filename('whatever')
+        self.assertEqual(result, 'foo.pt')
+        self.assertEqual(source.resource_name, '')
+
+    def test_get_filename_file_doesnt_exist(self):
+        source = DummyAssetSource(filename=None)
+        overrides = [DummyOverride(None), DummyOverride((source, 'wont_exist'))]
+        package = DummyPackage('package')
+        po = self._makeOne(package)
+        po.overrides = overrides
+        self.assertEqual(po.get_filename('whatever'), None)
+        self.assertEqual(source.resource_name, 'wont_exist')
+
+    def test_get_stream(self):
+        source = DummyAssetSource(stream='a stream?')
+        overrides = [DummyOverride(None), DummyOverride((source, 'foo.pt'))]
+        package = DummyPackage('package')
+        po = self._makeOne(package)
+        po.overrides = overrides
+        self.assertEqual(po.get_stream('whatever'), 'a stream?')
+        self.assertEqual(source.resource_name, 'foo.pt')
+        
+    def test_get_stream_file_doesnt_exist(self):
+        source = DummyAssetSource(stream=None)
+        overrides = [DummyOverride(None), DummyOverride((source, 'wont_exist'))]
+        package = DummyPackage('package')
+        po = self._makeOne(package)
+        po.overrides = overrides
+        self.assertEqual(po.get_stream('whatever'), None)
+        self.assertEqual(source.resource_name, 'wont_exist')
+
+    def test_get_string(self):
+        source = DummyAssetSource(string='a string')
+        overrides = [DummyOverride(None), DummyOverride((source, 'foo.pt'))]
+        package = DummyPackage('package')
+        po = self._makeOne(package)
+        po.overrides = overrides
+        self.assertEqual(po.get_string('whatever'), 'a string')
+        self.assertEqual(source.resource_name, 'foo.pt')
+        
+    def test_get_string_file_doesnt_exist(self):
+        source = DummyAssetSource(string=None)
+        overrides = [DummyOverride(None), DummyOverride((source, 'wont_exist'))]
+        package = DummyPackage('package')
+        po = self._makeOne(package)
+        po.overrides = overrides
+        self.assertEqual(po.get_string('whatever'), None)
+        self.assertEqual(source.resource_name, 'wont_exist')
+
+    def test_has_resource(self):
+        source = DummyAssetSource(exists=True)
+        overrides = [DummyOverride(None), DummyOverride((source, 'foo.pt'))]
+        package = DummyPackage('package')
+        po = self._makeOne(package)
+        po.overrides = overrides
+        self.assertEqual(po.has_resource('whatever'), True)
+        self.assertEqual(source.resource_name, 'foo.pt')
+
+    def test_has_resource_file_doesnt_exist(self):
+        source = DummyAssetSource(exists=None)
+        overrides = [DummyOverride(None), DummyOverride((source, 'wont_exist'))]
+        package = DummyPackage('package')
+        po = self._makeOne(package)
+        po.overrides = overrides
+        self.assertEqual(po.has_resource('whatever'), None)
+        self.assertEqual(source.resource_name, 'wont_exist')
+
+    def test_isdir_false(self):
+        source = DummyAssetSource(isdir=False)
+        overrides = [DummyOverride(None), DummyOverride((source, 'foo.pt'))]
+        package = DummyPackage('package')
+        po = self._makeOne(package)
+        po.overrides = overrides
+        self.assertEqual(po.isdir('whatever'), False)
+        self.assertEqual(source.resource_name, 'foo.pt')
+
+    def test_isdir_true(self):
+        source = DummyAssetSource(isdir=True)
+        overrides = [DummyOverride(None), DummyOverride((source, 'foo.pt'))]
+        package = DummyPackage('package')
+        po = self._makeOne(package)
+        po.overrides = overrides
+        self.assertEqual(po.isdir('whatever'), True)
+        self.assertEqual(source.resource_name, 'foo.pt')
+
+    def test_isdir_doesnt_exist(self):
+        source = DummyAssetSource(isdir=None)
+        overrides = [DummyOverride(None), DummyOverride((source, 'wont_exist'))]
+        package = DummyPackage('package')
+        po = self._makeOne(package)
+        po.overrides = overrides
+        self.assertEqual(po.isdir('whatever'), None)
+        self.assertEqual(source.resource_name, 'wont_exist')
+
+    def test_listdir(self):
+        source = DummyAssetSource(listdir=True)
+        overrides = [DummyOverride(None), DummyOverride((source, 'foo.pt'))]
+        package = DummyPackage('package')
+        po = self._makeOne(package)
+        po.overrides = overrides
+        self.assertEqual(po.listdir('whatever'), True)
+        self.assertEqual(source.resource_name, 'foo.pt')
+
+    def test_listdir_doesnt_exist(self):
+        source = DummyAssetSource(listdir=None)
+        overrides = [DummyOverride(None), DummyOverride((source, 'wont_exist'))]
+        package = DummyPackage('package')
+        po = self._makeOne(package)
+        po.overrides = overrides
+        self.assertEqual(po.listdir('whatever'), None)
+        self.assertEqual(source.resource_name, 'wont_exist')
+
+    # PEP 302 __loader__ extensions:  use the "real" __loader__, if present.
+    def test_get_data_pkg_has_no___loader__(self):
+        package = DummyPackage('package')
+        po = self._makeOne(package)
+        self.assertRaises(NotImplementedError, po.get_data, 'whatever')
+
+    def test_get_data_pkg_has___loader__(self):
+        package = DummyPackage('package')
+        loader = package.__loader__  = DummyLoader()
+        po = self._makeOne(package)
+        self.assertEqual(po.get_data('whatever'), b'DEADBEEF')
+        self.assertEqual(loader._got_data, 'whatever')
+
+    def test_is_package_pkg_has_no___loader__(self):
+        package = DummyPackage('package')
+        po = self._makeOne(package)
+        self.assertRaises(NotImplementedError, po.is_package, 'whatever')
+
+    def test_is_package_pkg_has___loader__(self):
+        package = DummyPackage('package')
+        loader = package.__loader__  = DummyLoader()
+        po = self._makeOne(package)
+        self.assertTrue(po.is_package('whatever'))
+        self.assertEqual(loader._is_package, 'whatever')
+
+    def test_get_code_pkg_has_no___loader__(self):
+        package = DummyPackage('package')
+        po = self._makeOne(package)
+        self.assertRaises(NotImplementedError, po.get_code, 'whatever')
+
+    def test_get_code_pkg_has___loader__(self):
+        package = DummyPackage('package')
+        loader = package.__loader__  = DummyLoader()
+        po = self._makeOne(package)
+        self.assertEqual(po.get_code('whatever'), b'DEADBEEF')
+        self.assertEqual(loader._got_code, 'whatever')
+
+    def test_get_source_pkg_has_no___loader__(self):
+        package = DummyPackage('package')
+        po = self._makeOne(package)
+        self.assertRaises(NotImplementedError, po.get_source, 'whatever')
+
+    def test_get_source_pkg_has___loader__(self):
+        package = DummyPackage('package')
+        loader = package.__loader__ = DummyLoader()
+        po = self._makeOne(package)
+        self.assertEqual(po.get_source('whatever'), 'def foo():\n    pass')
+        self.assertEqual(loader._got_source, 'whatever')
+
+class AssetSourceIntegrationTests(object):
+
+    def test_get_filename(self):
+        source = self._makeOne('')
+        self.assertEqual(source.get_filename('test_assets.py'),
+                         os.path.join(here, 'test_assets.py'))
+
+    def test_get_filename_with_prefix(self):
+        source = self._makeOne('test_assets.py')
+        self.assertEqual(source.get_filename(''),
+                         os.path.join(here, 'test_assets.py'))
+
+    def test_get_filename_file_doesnt_exist(self):
+        source = self._makeOne('')
+        self.assertEqual(source.get_filename('wont_exist'), None)
+
+    def test_get_stream(self):
+        source = self._makeOne('')
+        with source.get_stream('test_assets.py') as stream:
+            _assertBody(stream.read(), os.path.join(here, 'test_assets.py'))
+
+    def test_get_stream_with_prefix(self):
+        source = self._makeOne('test_assets.py')
+        with source.get_stream('') as stream:
+            _assertBody(stream.read(), os.path.join(here, 'test_assets.py'))
+
+    def test_get_stream_file_doesnt_exist(self):
+        source = self._makeOne('')
+        self.assertEqual(source.get_stream('wont_exist'), None)
+
+    def test_get_string(self):
+        source = self._makeOne('')
+        _assertBody(source.get_string('test_assets.py'),
+                    os.path.join(here, 'test_assets.py'))
+
+    def test_get_string_with_prefix(self):
+        source = self._makeOne('test_assets.py')
+        _assertBody(source.get_string(''),
+                    os.path.join(here, 'test_assets.py'))
+
+    def test_get_string_file_doesnt_exist(self):
+        source = self._makeOne('')
+        self.assertEqual(source.get_string('wont_exist'), None)
+
+    def test_exists(self):
+        source = self._makeOne('')
+        self.assertEqual(source.exists('test_assets.py'), True)
+
+    def test_exists_with_prefix(self):
+        source = self._makeOne('test_assets.py')
+        self.assertEqual(source.exists(''), True)
+
+    def test_exists_file_doesnt_exist(self):
+        source = self._makeOne('')
+        self.assertEqual(source.exists('wont_exist'), None)
+
+    def test_isdir_false(self):
+        source = self._makeOne('')
+        self.assertEqual(source.isdir('test_assets.py'), False)
+
+    def test_isdir_true(self):
+        source = self._makeOne('')
+        self.assertEqual(source.isdir('files'), True)
+
+    def test_isdir_doesnt_exist(self):
+        source = self._makeOne('')
+        self.assertEqual(source.isdir('wont_exist'), None)
+
+    def test_listdir(self):
+        source = self._makeOne('')
+        self.assertTrue(source.listdir('files'))
+
+    def test_listdir_doesnt_exist(self):
+        source = self._makeOne('')
+        self.assertEqual(source.listdir('wont_exist'), None)
+
+class TestPackageAssetSource(AssetSourceIntegrationTests, unittest.TestCase):
+
+    def _getTargetClass(self):
+        from pyramid.config.assets import PackageAssetSource
+        return PackageAssetSource
+
+    def _makeOne(self, prefix, package='pyramid.tests.test_config'):
+        klass = self._getTargetClass()
+        return klass(package, prefix)
+
+class TestFSAssetSource(AssetSourceIntegrationTests, unittest.TestCase):
+    def _getTargetClass(self):
+        from pyramid.config.assets import FSAssetSource
+        return FSAssetSource
+
+    def _makeOne(self, prefix, base_prefix=here):
+        klass = self._getTargetClass()
+        return klass(os.path.join(base_prefix, prefix))
+
+class TestDirectoryOverride(unittest.TestCase):
+    def _getTargetClass(self):
+        from pyramid.config.assets import DirectoryOverride
+        return DirectoryOverride
+
+    def _makeOne(self, path, source):
+        klass = self._getTargetClass()
+        return klass(path, source)
+
+    def test_it_match(self):
+        source = DummyAssetSource()
+        o = self._makeOne('foo/', source)
+        result = o('foo/something.pt')
+        self.assertEqual(result, (source, 'something.pt'))
+        
+    def test_it_no_match(self):
+        source = DummyAssetSource()
+        o = self._makeOne('foo/', source)
+        result = o('baz/notfound.pt')
+        self.assertEqual(result, None)
+
+class TestFileOverride(unittest.TestCase):
+    def _getTargetClass(self):
+        from pyramid.config.assets import FileOverride
+        return FileOverride
+
+    def _makeOne(self, path, source):
+        klass = self._getTargetClass()
+        return klass(path, source)
+
+    def test_it_match(self):
+        source = DummyAssetSource()
+        o = self._makeOne('foo.pt', source)
+        result = o('foo.pt')
+        self.assertEqual(result, (source, ''))
+        
+    def test_it_no_match(self):
+        source = DummyAssetSource()
+        o = self._makeOne('foo.pt', source)
+        result = o('notfound.pt')
+        self.assertEqual(result, None)
+
+class DummyOverride:
+    def __init__(self, result):
+        self.result = result
+
+    def __call__(self, resource_name):
+        return self.result
+
+class DummyOverrides:
+    def __init__(self, result):
+        self.result = result
+
+    def get_filename(self, resource_name):
+        return self.result
+
+    listdir = isdir = has_resource = get_stream = get_string = get_filename
+
+class DummyPackageOverrides:
+    def __init__(self, package):
+        self.package = package
+        self.inserted = []
+
+    def insert(self, path, source):
+        self.inserted.append((path, source))
+    
+class DummyPkgResources:
+    def __init__(self):
+        self.registered = []
+
+    def register_loader_type(self, typ, inst):
+        self.registered.append((typ, inst))
+
+class DummyPackage:
+    def __init__(self, name):
+        self.__name__ = name
+
+class DummyAssetSource:
+    def __init__(self, **kw):
+        self.kw = kw
+
+    def get_filename(self, resource_name):
+        self.resource_name = resource_name
+        return self.kw['filename']
+
+    def get_stream(self, resource_name):
+        self.resource_name = resource_name
+        return self.kw['stream']
+
+    def get_string(self, resource_name):
+        self.resource_name = resource_name
+        return self.kw['string']
+
+    def exists(self, resource_name):
+        self.resource_name = resource_name
+        return self.kw['exists']
+
+    def isdir(self, resource_name):
+        self.resource_name = resource_name
+        return self.kw['isdir']
+
+    def listdir(self, resource_name):
+        self.resource_name = resource_name
+        return self.kw['listdir']
+ 
+class DummyLoader:
+    _got_data = _is_package = None
+    def get_data(self, path):
+        self._got_data = path
+        return b'DEADBEEF'
+    def is_package(self, fullname):
+        self._is_package = fullname
+        return True
+    def get_code(self, fullname):
+        self._got_code = fullname
+        return b'DEADBEEF'
+    def get_source(self, fullname):
+        self._got_source = fullname
+        return 'def foo():\n    pass'
+
+class DummyUnderOverride:
+    def __call__(self, package, path, source, _info=''):
+        self.package = package
+        self.path = path
+        self.source = source
+
+def read_(src):
+    with open(src, 'rb') as f:
+        contents = f.read()
+    return contents
+
+def _assertBody(body, filename):
+    # strip both \n and \r for windows
+    body = body.replace(b'\r', b'')
+    body = body.replace(b'\n', b'')
+    data = read_(filename)
+    data = data.replace(b'\r', b'')
+    data = data.replace(b'\n', b'')
+    assert(body == data)