Add: Store

3 files changed, 178 insertions, 0 deletions

diff --git a/muck/__init__.py b/muck/__init__.py
index 69831f1..d14c8e1 100644
--- a/muck/__init__.py
+++ b/muck/__init__.py
@@ -23,3 +23,4 @@ from .change import (
 )
 from .mem import MemoryStore
 from .pers import PersistentStore
+from .store import Store
diff --git a/muck/store.py b/muck/store.py
new file mode 100644
index 0000000..59a74da
--- /dev/null
+++ b/muck/store.py
@@ -0,0 +1,30 @@
+# Copyright (C) 2018  Lars Wirzenius
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+import muck
+
+
+class Store:
+
+    def __init__(self, dirname):
+        self._pers = muck.PersistentStore(dirname)
+        self._ms = muck.MemoryStore()
+
+    def change(self, chg):
+        self._ms.change(chg)
+        self._pers.append_change(chg)
+
+    def get_memory_store(self):
+        return self._ms
diff --git a/muck/store_tests.py b/muck/store_tests.py
new file mode 100644
index 0000000..eee729b
--- /dev/null
+++ b/muck/store_tests.py
@@ -0,0 +1,147 @@
+# Copyright (C) 2018  Lars Wirzenius
+# This program is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# This program is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with this program.  If not, see <http://www.gnu.org/licenses/>.
+
+
+import shutil
+import tempfile
+import unittest
+
+import muck
+
+
+class StoreTests(unittest.TestCase):
+
+    def setUp(self):
+        self.tempdir = tempfile.mkdtemp()
+        self.st = muck.Store(self.tempdir)
+
+    def tearDown(self):
+        shutil.rmtree(self.tempdir)
+
+    def test_is_initially_empty(self):
+        ms = self.st.get_memory_store()
+        self.assertEqual(len(ms), 0)
+        self.assertEqual(ms.as_dict(), {})
+
+    def test_creates_resource(self):
+        meta = {
+            'id': 'id-1',
+            'rev': 'rev-1',
+        }
+
+        res = {
+            'foo': 'bar',
+        }
+
+        chg = muck.CreateChange(meta=meta, res=res)
+        self.st.change(chg)
+
+        ms = self.st.get_memory_store()
+        self.assertEqual(len(ms), 1)
+        self.assertEqual(
+            ms.as_dict(),
+            {
+                'id-1': (meta, res),
+            })
+
+    def test_wont_create_resource_with_conflicting_id(self):
+        meta = {
+            'id': 'id-1',
+            'rev': 'rev-1',
+        }
+
+        res = {
+            'foo': 'bar',
+        }
+
+        chg = muck.CreateChange(meta=meta, res=res)
+        self.st.change(chg)
+
+        ms = self.st.get_memory_store()
+        with self.assertRaises(muck.Error):
+            ms.change(chg)
+
+    def test_updates_resource(self):
+        meta_1 = {
+            'id': 'id-1',
+            'rev': 'rev-1',
+        }
+
+        res_v1 = {
+            'foo': 'bar',
+        }
+
+        meta_2 = dict(meta_1)
+        meta_2['rev'] = 'rev-2'
+
+        res_v2 = dict(res_v1)
+        res_v2['foo'] = 'yo'
+
+        create = muck.CreateChange(meta=meta_1, res=res_v1)
+        update = muck.UpdateChange(meta=meta_2, res=res_v2)
+
+        self.st.change(create)
+        self.st.change(update)
+
+        ms = self.st.get_memory_store()
+        self.assertEqual(len(ms), 1)
+        self.assertEqual(
+            ms.as_dict(),
+            {
+                'id-1': (meta_2, res_v2),
+            })
+
+    def test_refuses_to_update_resource_that_didnt_exist(self):
+        meta = {
+            'id': 'id-1',
+            'rev': 'rev-1',
+        }
+
+        res = {
+            'foo': 'bar',
+        }
+
+        update = muck.UpdateChange(meta=meta, res=res)
+        with self.assertRaises(muck.Error):
+            self.st.change(update)
+
+    def test_deletes_resource(self):
+        meta = {
+            'id': 'id-1',
+            'rev': 'rev-1',
+        }
+
+        res = {
+            'foo': 'bar',
+        }
+
+        create = muck.CreateChange(meta=meta, res=res)
+        delete = muck.DeleteChange(meta=meta)
+
+        self.st.change(create)
+        self.st.change(delete)
+
+        ms = self.st.get_memory_store()
+        self.assertEqual(len(ms), 0)
+        self.assertEqual(ms.as_dict(), {})
+
+    def test_refuses_to_delete_resource_that_doesnt_exist(self):
+        meta = {
+            'id': 'id-1',
+            'rev': 'rev-1',
+        }
+
+        delete = muck.DeleteChange(meta=meta)
+        with self.assertRaises(muck.Error):
+            self.st.change(delete)