# -*- coding: utf-8 -*-
#
# Licensed to the Apache Software Foundation (ASF) under one
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# distributed with this work for additional information
# regarding copyright ownership.  The ASF licenses this file
# to you under the Apache License, Version 2.0 (the
# "License"); you may not use this file except in compliance
# with the License.  You may obtain a copy of the License at
#
#   http://www.apache.org/licenses/LICENSE-2.0
#
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# software distributed under the License is distributed on an
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import unittest
from unittest import mock

from airflow.utils import net


def get_hostname():
    return 'awesomehostname'


class TestGetHostname(unittest.TestCase):

    @mock.patch('airflow.utils.net.socket')
    @mock.patch('airflow.utils.net.conf')
    def test_get_hostname_unset(self, patched_conf, patched_socket):
        patched_conf.get = mock.Mock(return_value=None)
        patched_socket.getfqdn = mock.Mock(return_value='first')
        self.assertTrue(net.get_hostname() == 'first')

    @mock.patch('airflow.utils.net.conf')
    def test_get_hostname_set(self, patched_conf):
        patched_conf.get = mock.Mock(
            return_value='tests.utils.test_net:get_hostname'
        )
        self.assertTrue(net.get_hostname() == 'awesomehostname')

    @mock.patch('airflow.utils.net.conf')
    def test_get_hostname_set_incorrect(self, patched_conf):
        patched_conf.get = mock.Mock(
            return_value='tests.utils.test_net'
        )
        with self.assertRaises(ValueError):
            net.get_hostname()

    @mock.patch('airflow.utils.net.conf')
    def test_get_hostname_set_missing(self, patched_conf):
        patched_conf.get = mock.Mock(
            return_value='tests.utils.test_net:missing_func'
        )
        with self.assertRaises(AttributeError):
            net.get_hostname()