Extract out stream() method

ssb/tests/test_feed.py

@@ -4,7 +4,7 @@ from collections import OrderedDict
 import pytest
 from nacl.signing import SigningKey, VerifyKey
 
-from ssb.feed import LocalMessage, LocalFeed, Feed, Message, NoPrivateKeyException
+from ssb.feed import LocalMessage, LocalFeed, Feed, Message
 
 
 @pytest.fixture()
@@ -99,3 +99,27 @@ def test_remote_no_signature(remote_feed):
             ('name', 'neo'),
             ('description', 'The Chosen One')
         ]), None, timestamp=1495706260190)
+
+
+def test_serialize(local_feed):
+    m1 = LocalMessage(local_feed, OrderedDict([
+        ('type', 'about'),
+        ('about', local_feed.id),
+        ('name', 'neo'),
+        ('description', 'The Chosen One')
+    ]), timestamp=1495706260190)
+
+    assert m1.serialize() == b"""{
+  "previous": null,
+  "author": "@I/4cyN/jPBbDsikbHzAEvmaYlaJK33lW3UhWjNXjyrU=.ed25519",
+  "sequence": 1,
+  "timestamp": 1495706260190,
+  "hash": "sha256",
+  "content": {
+    "type": "about",
+    "about": "@I/4cyN/jPBbDsikbHzAEvmaYlaJK33lW3UhWjNXjyrU=.ed25519",
+    "name": "neo",
+    "description": "The Chosen One"
+  },
+  "signature": "lPsQ9P10OgeyH6u0unFgiI2wV/RQ7Q2x2ebxnXYCzsJ055TBMXphRADTKhOMS2EkUxXQ9k3amj5fnWPudGxwBQ==.sig.ed25519"
+}"""