NewMockNetConn creates a mock of a bi-directional net.Conn, for testing the client's network logic.

SimulateStableAPNSServer returns a mock binary APNs server that will respond to all notifications with the given status code.

APNSNotification contains the unserialized binary notification.

APNSResponse represents the mock response generated by the mock server.

MockDirectionalConn represents the one-directional connection, and mocks a network connection.

MockNetConn is a mock of the net.Conn interface, used for testing for race conditions in the binary API client's network code.