Rewrite collections test

tests/storage/__init__.py

@@ -6,6 +6,7 @@
     :copyright: (c) 2014 Markus Unterwaditzer & contributors
     :license: MIT, see LICENSE for more details.
 '''
+import functools
 import random
 
 import pytest
@@ -24,7 +25,7 @@ def format_item(item_template):
     return Item(item_template.format(r=r))
 
 
-class BaseStorageTests(object):
+class StorageTests(object):
     @pytest.fixture
     def get_storage_args(self):
         '''
@@ -46,6 +47,11 @@ class BaseStorageTests(object):
     def get_item(self, item_template):
         return lambda: format_item(item_template)
 
+    @pytest.fixture
+    def requires_collections(self):
+        if not getattr(self, 'supports_collections', True):
+            pytest.skip('This storage does not support collections.')
+
     def test_generic(self, s, get_item):
         items = [get_item() for i in range(1, 10)]
         hrefs = []
@@ -144,9 +150,7 @@ class BaseStorageTests(object):
         assert s.instance_name is None
 
 
-class SupportsCollections(object):
-
-    def test_discover(self, get_storage_args, get_item):
+    def test_discover(self, requires_collections, get_storage_args, get_item):
         expected = set()
         items = {}
 
@@ -172,19 +176,16 @@ class SupportsCollections(object):
             rv = list(s.list())
             assert rv == items[collection]
 
-    def test_discover_collection_arg(self, get_storage_args):
+    def test_discover_collection_arg(self, requires_collections,
+                                     get_storage_args):
         args = get_storage_args(collection='test2')
         with pytest.raises(TypeError) as excinfo:
             list(self.storage_class.discover(**args))
 
         assert 'collection argument must not be given' in str(excinfo.value)
 
-    def test_collection_arg(self, get_storage_args):
+    def test_collection_arg(self, requires_collections, get_storage_args):
         s = self.storage_class(**get_storage_args(collection='test2'))
         # Can't do stronger assertion because of radicale, which needs a
         # fileextension to guess the collection type.
         assert 'test2' in s.collection
-
-
-class StorageTests(BaseStorageTests, SupportsCollections):
-    pass

tests/storage/test_http_with_singlefile.py

@@ -15,7 +15,7 @@ from vdirsyncer.storage.base import Storage
 import vdirsyncer.storage.http
 from vdirsyncer.storage.singlefile import SingleFileStorage
 
-from . import BaseStorageTests
+from . import StorageTests
 from .. import assert_item_equals
 
 
@@ -48,8 +48,9 @@ class CombinedStorage(Storage):
         return self._writer.delete(*a, **kw)
 
 
-class TestHttpStorage(BaseStorageTests):
+class TestHttpStorage(StorageTests):
     storage_class = CombinedStorage
+    supports_collections = False
 
     @pytest.fixture(autouse=True)
     def setup_tmpdir(self, tmpdir, monkeypatch):

tests/storage/test_memory.py

@@ -12,12 +12,13 @@ import pytest
 
 from vdirsyncer.storage.memory import MemoryStorage
 
-from . import BaseStorageTests
+from . import StorageTests
 
 
-class TestMemoryStorage(BaseStorageTests):
+class TestMemoryStorage(StorageTests):
 
     storage_class = MemoryStorage
+    supports_collections = False
 
     @pytest.fixture
     def get_storage_args(self):

tests/storage/test_singlefile.py

@@ -11,13 +11,14 @@ import pytest
 
 from vdirsyncer.storage.singlefile import SingleFileStorage
 
-from . import BaseStorageTests
+from . import StorageTests
 from .. import assert_item_equals
 
 
-class TestSingleFileStorage(BaseStorageTests):
+class TestSingleFileStorage(StorageTests):
 
     storage_class = SingleFileStorage
+    supports_collections = False
 
     @pytest.fixture(autouse=True)
     def setup(self, tmpdir):