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diff --git a/service/test/unit/adapter/mailstore/test_leap_attachment_store.py b/service/test/unit/adapter/mailstore/test_leap_attachment_store.py
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+++ b/service/test/unit/adapter/mailstore/test_leap_attachment_store.py
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+# -*- coding: utf-8 -*-
+#
+# Copyright (c) 2015 ThoughtWorks, Inc.
+#
+# Pixelated 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.
+#
+# Pixelated 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 Pixelated. If not, see <http://www.gnu.org/licenses/>.
+import json
+from uuid import uuid4
+
+from leap.mail.adaptors.soledad_indexes import MAIL_INDEXES
+from leap.soledad.common.document import SoledadDocument
+from mockito import mock, when, verify
+import test.support.mockito
+from twisted.internet import defer
+from twisted.trial.unittest import TestCase
+from leap.mail.adaptors.soledad import SoledadMailAdaptor, MailboxWrapper, ContentDocWrapper
+
+from pixelated.adapter.mailstore.leap_attachment_store import LeapAttachmentStore
+
+
+class TestLeapAttachmentStore(TestCase):
+    def setUp(self):
+        self.soledad = mock()
+        self.mbox_uuid = str(uuid4())
+        self.doc_by_id = {}
+        self.mbox_uuid_by_name = {}
+        self.mbox_soledad_docs = []
+
+        when(self.soledad).get_from_index('by-type', 'mbox').thenAnswer(lambda: defer.succeed(self.mbox_soledad_docs))
+        self._mock_get_mailbox('INBOX')
+
+    @defer.inlineCallbacks
+    def test_get_mail_attachment(self):
+        attachment_id = 'AAAA9AAD9E153D24265395203C53884506ABA276394B9FEC02B214BF9E77E48E'
+        doc = SoledadDocument(json=json.dumps({'content_type': 'foo/bar', 'raw': 'asdf'}))
+        when(self.soledad).get_from_index('by-type-and-payloadhash', 'cnt', attachment_id).thenReturn(defer.succeed([doc]))
+        store = LeapAttachmentStore(self.soledad)
+
+        attachment = yield store.get_mail_attachment(attachment_id)
+
+        self.assertEqual({'content-type': 'foo/bar', 'content': bytearray('asdf')}, attachment)
+
+    @defer.inlineCallbacks
+    def test_store_attachment(self):
+        content = 'this is some attachment content'
+        content_type = 'text/plain'
+        cdoc_serialized = {'content_transfer_encoding': 'base64', 'lkf': [], 'content_disposition': 'attachment',
+                           'ctype': '', 'raw': 'dGhpcyBpcyBzb21lIGF0dGFjaG1lbnQgY29udGVudA==',
+                           'phash': '9863729729D2E2EE8E52F0A7115CE33AD18DDA4B58E49AE08DD092D1C8E699B0',
+                           'content_type': 'text/plain', 'type': 'cnt'}
+
+        store = LeapAttachmentStore(self.soledad)
+
+        attachment_id = yield store.add_attachment(content, content_type)
+
+        self.assertEqual('9863729729D2E2EE8E52F0A7115CE33AD18DDA4B58E49AE08DD092D1C8E699B0', attachment_id)
+
+        verify(self.soledad).create_doc(cdoc_serialized, doc_id=attachment_id)
+
+    @defer.inlineCallbacks
+    def test_get_mail_attachment_different_content_encodings(self):
+        attachment_id = '1B0A9AAD9E153D24265395203C53884506ABA276394B9FEC02B214BF9E77E48E'
+        encoding_examples = [('', 'asdf', 'asdf'),
+                             ('base64', 'asdf', 'YXNkZg=='),
+                             ('quoted-printable', 'äsdf', '=C3=A4sdf')]
+
+        for transfer_encoding, data, encoded_data in encoding_examples:
+            doc = SoledadDocument(json=json.dumps({'content_type': 'foo/bar', 'raw': encoded_data,
+                                                   'content_transfer_encoding': transfer_encoding}))
+            when(self.soledad).get_from_index('by-type-and-payloadhash', 'cnt', attachment_id).thenReturn(defer.succeed([doc]))
+            store = LeapAttachmentStore(self.soledad)
+
+            attachment = yield store.get_mail_attachment(attachment_id)
+
+            self.assertEqual(bytearray(data), attachment['content'])
+
+    @defer.inlineCallbacks
+    def test_get_mail_attachment_throws_exception_if_attachment_does_not_exist(self):
+        attachment_id = '1B0A9AAD9E153D24265395203C53884506ABA276394B9FEC02B214BF9E77E48E'
+        when(self.soledad).get_from_index('by-type-and-payloadhash', 'cnt', attachment_id).thenReturn(defer.succeed([]))
+        store = LeapAttachmentStore(self.soledad)
+        try:
+            yield store.get_mail_attachment(attachment_id)
+            self.fail('ValueError exception expected')
+        except ValueError:
+            pass
+
+    def _mock_get_mailbox(self, mailbox_name, create_new_uuid=False):
+        mbox_uuid = self.mbox_uuid if not create_new_uuid else str(uuid4())
+        when(self.soledad).list_indexes().thenReturn(defer.succeed(MAIL_INDEXES)).thenReturn(
+            defer.succeed(MAIL_INDEXES))
+        doc_id = str(uuid4())
+        mbox = MailboxWrapper(doc_id=doc_id, mbox=mailbox_name, uuid=mbox_uuid)
+        soledad_doc = SoledadDocument(doc_id, json=json.dumps(mbox.serialize()))
+        when(self.soledad).get_from_index('by-type-and-mbox', 'mbox', mailbox_name).thenReturn(defer.succeed([soledad_doc]))
+        self._mock_get_soledad_doc(doc_id, mbox)
+
+        self.mbox_uuid_by_name[mailbox_name] = mbox_uuid
+        self.mbox_soledad_docs.append(soledad_doc)
+
+        return mbox, soledad_doc
+
+    def _mock_get_soledad_doc(self, doc_id, doc):
+        soledad_doc = SoledadDocument(doc_id, json=json.dumps(doc.serialize()))
+
+        # when(self.soledad).get_doc(doc_id).thenReturn(defer.succeed(soledad_doc))
+        when(self.soledad).get_doc(doc_id).thenAnswer(lambda: defer.succeed(soledad_doc))
+
+        self.doc_by_id[doc_id] = soledad_doc