add basic realtime auth

ably/__init__.py

@@ -1,4 +1,5 @@
 from ably.rest.rest import AblyRest
+from ably.realtime.realtime import AblyRealtime
 from ably.rest.auth import Auth
 from ably.rest.push import Push
 from ably.types.capability import Capability

ably/realtime/realtime.py

@@ -0,0 +1,34 @@
+import logging
+from ably.rest.auth import Auth
+from ably.types.options import Options
+
+
+log = logging.getLogger(__name__)
+
+class AblyRealtime:
+    """Ably Realtime Client"""
+
+    def __init__(self, key=None, **kwargs):
+        """Create an AblyRealtime instance.
+
+        :Parameters:
+          **Credentials**
+          - `key`: a valid ably key string
+        """
+
+        if key is not None:
+            options = Options(key=key, **kwargs)
+        else:
+            options = Options(**kwargs)
+
+        self.__auth = Auth(self, options)
+
+        self.__options = options
+
+    @property
+    def auth(self):
+        return self.__auth
+
+    @property
+    def options(self):
+        return self.__options

test/ably/realtimeauthtest.py

@@ -0,0 +1,21 @@
+import pytest
+from ably import Auth, AblyRealtime
+from ably.util.exceptions import AblyAuthException
+from test.ably.utils import BaseAsyncTestCase
+
+
+class TestRealtimeAuth(BaseAsyncTestCase):
+    async def setUp(self):
+        self.invalid_key = "some key"
+        self.valid_key_format = "Vjhddw.owt:R97sjjbdERJdjwer"
+
+    def test_auth_with_correct_key_format(self):
+        key = self.valid_key_format.split(":")
+        ably = AblyRealtime(self.valid_key_format)
+        assert Auth.Method.BASIC == ably.auth.auth_mechanism, "Unexpected Auth method mismatch"
+        assert ably.auth.auth_options.key_name == key[0]
+        assert ably.auth.auth_options.key_secret == key[1]
+
+    def test_auth_incorrect_key_format(self):
+        with pytest.raises(AblyAuthException):
+            ably = AblyRealtime(self.invalid_key)