added tests for mongodb connection

tests/backend/mongodb/test_connection.py

@@ -0,0 +1,16 @@
+
+def test_get_connection_returns_the_correct_instance():
+    from bigchaindb.backend import connect
+    from bigchaindb.backend.connection import Connection
+    from bigchaindb.backend.mongodb.connection import MongoDBConnection
+
+    config = {
+        'backend': 'mongodb',
+        'host': 'localhost',
+        'port': 27017,
+        'name': 'test'
+    }
+
+    conn = connect(**config)
+    assert isinstance(conn, Connection)
+    assert isinstance(conn, MongoDBConnection)

tests/backend/rethinkdb/test_connection.py

@@ -0,0 +1,16 @@
+
+def test_get_connection_returns_the_correct_instance():
+    from bigchaindb.backend import connect
+    from bigchaindb.backend.connection import Connection
+    from bigchaindb.backend.rethinkdb.connection import RethinkDBConnection
+
+    config = {
+        'backend': 'rethinkdb',
+        'host': 'localhost',
+        'port': 28015,
+        'name': 'test'
+    }
+
+    conn = connect(**config)
+    assert isinstance(conn, Connection)
+    assert isinstance(conn, RethinkDBConnection)

tests/backend/test_connection.py

@@ -1,23 +1,6 @@
 import pytest
 
 
-def test_get_connection_returns_the_correct_instance():
-    from bigchaindb.backend import connect
-    from bigchaindb.backend.connection import Connection
-    from bigchaindb.backend.rethinkdb.connection import RethinkDBConnection
-
-    config = {
-        'backend': 'rethinkdb',
-        'host': 'localhost',
-        'port': 28015,
-        'name': 'test'
-    }
-
-    conn = connect(**config)
-    assert isinstance(conn, Connection)
-    assert isinstance(conn, RethinkDBConnection)
-
-
 def test_get_connection_raises_a_configuration_error(monkeypatch):
     from bigchaindb.common.exceptions import ConfigurationError
     from bigchaindb.backend import connect
@@ -28,6 +11,7 @@ def test_get_connection_raises_a_configuration_error(monkeypatch):
     with pytest.raises(ConfigurationError):
         # We need to force a misconfiguration here
         monkeypatch.setattr('bigchaindb.backend.connection.BACKENDS',
-                            {'catsandra': 'bigchaindb.backend.meowmeow.Catsandra'})
+                            {'catsandra':
+                             'bigchaindb.backend.meowmeow.Catsandra'})
 
         connect('catsandra', 'localhost', '1337', 'mydb')