How to use the elasticsearch2.exceptions.ConnectionError function in elasticsearch2

def test_sniff_on_fail_triggers_sniffing_on_fail(self):
        t = Transport([{'exception': ConnectionError('abandon ship')}, {"data": CLUSTER_NODES}],
            connection_class=DummyConnection, sniff_on_connection_fail=True, max_retries=0, randomize_hosts=False)

        self.assertRaises(ConnectionError, t.perform_request, 'GET', '/')
        self.assertEquals(1, len(t.connection_pool.connections))
        self.assertEquals('http://1.1.1.1:123', t.get_connection().host)

def test_request_will_fail_after_X_retries(self):
        t = Transport([{'exception': ConnectionError('abandon ship')}], connection_class=DummyConnection)

        self.assertRaises(ConnectionError, t.perform_request, 'GET', '/')
        self.assertEquals(4, len(t.get_connection().calls))

def test_failed_connection_will_be_marked_as_dead(self):
        t = Transport([{'exception': ConnectionError('abandon ship')}] * 2, connection_class=DummyConnection)

        self.assertRaises(ConnectionError, t.perform_request, 'GET', '/')
        self.assertEquals(0, len(t.connection_pool.connections))

def test_failed_connection_will_be_marked_as_dead(self):
        t = Transport([{'exception': ConnectionError('abandon ship')}] * 2, connection_class=DummyConnection)

        self.assertRaises(ConnectionError, t.perform_request, 'GET', '/')
        self.assertEquals(0, len(t.connection_pool.connections))