added unit test

spec/jam_ruby/models/connection_spec.rb

@@ -0,0 +1,20 @@
+require 'spec_helper'
+
+describe Connection do
+
+  it 'can grant access to valid user' do
+
+    user1 = FactoryGirl.create(:user)  # in the jam session
+    user2 = FactoryGirl.create(:user)  # in the jam session
+    user3 = FactoryGirl.create(:user)  # not in the jam session
+
+    jam_session = FactoryGirl.create(:jam_session, :creator => user1)
+
+    jam_session_member1 = FactoryGirl.create(:jam_session_member, :user => user1, :jam_session => jam_session)
+    jam_session_member2 = FactoryGirl.create(:jam_session_member, :user => user2, :jam_session => jam_session)
+
+    jam_session.access?(user1).should == true
+    jam_session.access?(user2).should == true
+    jam_session.access?(user3).should == false
+  end
+end