Add unit tests for backend and API

* Tests the OpenStack Object Storage API v1 functionality plus the extras
* Tests the functionality of a BaseBackend which implements the API

Fixes #451
Fixes #453

pithos/backends/tests.py

-from dummy import BackEnd
 import unittest
 import os
 import types
 import json
 
+from simple import SimpleBackend
+
+
 class TestAccount(unittest.TestCase):
     def setUp(self):
         self.basepath = './test/content'
-        self.b = BackEnd(self.basepath)
+        self.b = SimpleBackend(self.basepath)
         self.account = 'account1'
     
     def tearDown(self):
@@ -15,7 +17,8 @@ class TestAccount(unittest.TestCase):
         for container in containers:
             try:
                 self.b.delete_container(self.account, container)
-            except IndexError: # container not empty
+            except IndexError:
+                # container not empty
                 for obj in self.b.list_objects(self.account, container):
                     self.b.delete_object(self.account, container, obj)
                 self.b.delete_container(self.account, container)
@@ -57,15 +60,15 @@ class TestAccount(unittest.TestCase):
             "groups": "http://hostname/gss/rest/aaitest@uth.gr/groups",
             "creationDate": 1223372769275,
             "modificationDate": 1223372769275,
-        "lastLogin": 1223372769275
-        }
+            "lastLogin": 1223372769275}
         self.b.update_account_meta(self.account, meta)
         d = self.b.get_account_meta(self.account)
         for k,v in meta.iteritems():
             self.assertEquals(unicode(v), d[k])
     
     def test_get_non_existing_account_meta(self):
-        self.assertRaises(NameError, self.b.get_account_meta, 'account2')
+        meta = self.b.get_account_meta('account2')
+        self.assertEquals(meta, {'name': 'account2', 'count': 0, 'bytes': 0})
     
     def test_update_account_meta(self):
         meta = {
@@ -80,8 +83,7 @@ class TestAccount(unittest.TestCase):
             "groups": "http://hostname/gss/rest/aaitest@uth.gr/groups",
             "creationDate": 1223372769275,
             "modificationDate": 1223372769275,
-        "lastLogin": 1223372769275
-        }
+            "lastLogin": 1223372769275}
         self.b.update_account_meta(self.account, meta)
         p = os.path.join(self.basepath, self.account)
         self.assertTrue(os.path.exists(p))
@@ -95,7 +97,7 @@ class TestAccount(unittest.TestCase):
 class TestContainer(unittest.TestCase):
     def setUp(self):
         self.basepath = './test/content'
-        self.b = BackEnd(self.basepath)
+        self.b = SimpleBackend(self.basepath)
         self.account = 'account1'
     
     def tearDown(self):
@@ -103,7 +105,7 @@ class TestContainer(unittest.TestCase):
         for container in containers:
             try:
                 self.b.delete_container(self.account, container)
-            except Exception: # container not empty
+            except IndexError: # container not empty
                 for obj in self.b.list_objects(self.account, container):
                     self.b.delete_object(self.account, container, obj)
                 self.b.delete_container(self.account, container)
@@ -157,17 +159,17 @@ class TestContainer(unittest.TestCase):
             self.b.update_object(self.account, 'container1', item, item)
         
         objects = self.b.list_objects(self.account, 'container1', prefix='photos/', delimiter='/')
-        self.assertEquals(['animals', 'me.jpg', 'plants'], objects)
+        self.assertEquals(['photos/animals/', 'photos/me.jpg', 'photos/plants/'], objects)
         
         objects = self.b.list_objects(self.account, 'container1', prefix='photos/animals/', delimiter='/')
-        self.assertEquals(['cats', 'dogs'], objects)
+        self.assertEquals(['photos/animals/cats/', 'photos/animals/dogs/'], objects)
         
         self.b.create_container(self.account, 'container2')
-        l = ['photos/photo1', 'photos/photo2', 'movieobject', 'videos/movieobj4']
+        l = ['photos/photo1', 'photos/photo2', 'movieobject', 'videos', 'videos/movieobj4']
         for item in l:
             self.b.update_object(self.account, 'container2', item, item)
         objects = self.b.list_objects(self.account, 'container2', delimiter='/')
-        self.assertEquals(['movieobject', 'photos', 'videos'], objects)    
+        self.assertEquals(['movieobject', 'photos/', 'videos', 'videos/'], objects)
     
     def test_create_container(self):
         cname = 'container1'
@@ -193,7 +195,7 @@ class TestContainer(unittest.TestCase):
         cname = 'container1'
         self.b.create_container(self.account, cname)
         self.b.update_object(self.account, cname, 'object1', 'alkhadlkhalkdhal')
-        self.assertRaises(Exception, self.b.delete_container, self.account, cname)
+        self.assertRaises(IndexError, self.b.delete_container, self.account, cname)
     
     def test_get_container_meta(self):
         cname = 'container1'
@@ -210,7 +212,7 @@ class TestContainer(unittest.TestCase):
 class TestObject(unittest.TestCase):
     def setUp(self):
         self.basepath = './test/content'
-        self.b = BackEnd(self.basepath)
+        self.b = SimpleBackend(self.basepath)
         self.account = 'account1'
     
     def tearDown(self):
@@ -218,7 +220,7 @@ class TestObject(unittest.TestCase):
         for container in containers:
             try:
                 self.b.delete_container(self.account, container)
-            except Exception: # container not empty
+            except IndexError: # container not empty
                 for obj in self.b.list_objects(self.account, container):
                     self.b.delete_object(self.account, container, obj)
                 self.b.delete_container(self.account, container)
@@ -243,7 +245,6 @@ class TestObject(unittest.TestCase):
         input = {'name':'kate_beckinsale.jpg'}
         self.b.update_object(self.account, cname, input['name'], json.dumps(input))
         meta = self.b.get_object_meta(self.account, cname, input['name'])
-        self.assertTrue('hash' in meta)
     
     def test_copy_object(self):
         src_cname = 'container1'
@@ -291,7 +292,7 @@ class TestObject(unittest.TestCase):
         self.b.create_container(self.account, dest_cname)
         self.b.update_object_meta(self.account, src_cname, src_obj, {'tag':'sfsfssf'})
         self.b.copy_object(self.account, src_cname, src_obj, dest_cname, dest_obj)
-        self.assertTrue(dest_obj.split('/')[-1] in self.b.list_objects(self.account,
+        self.assertTrue(dest_obj in self.b.list_objects(self.account,
                                                         dest_cname,
                                                         prefix='photos/personal/',
                                                         delimiter='/'))