import redis
from django.test import TestCase

from fetcher import musicbrainz


class MusicBrainzTestCase(TestCase):

    def setUp(self):
        redis.Redis().flushall()

    def test_can_do_basic_request(self):
        artist_url = 'https://musicbrainz.org/ws/2/artist/65f4f0c5-ef9e-490c-aee3-909e7ae6b2ab'
        musicbrainz._do_request(artist_url)

    def test_do_request_response_format(self):
        artist_url = 'https://musicbrainz.org/ws/2/artist/65f4f0c5-ef9e-490c-aee3-909e7ae6b2ab'
        response = musicbrainz._do_request(artist_url)
        self.assertIsInstance(response, dict)
        self.assertEquals(response['status'], 200)
        self.assertIsInstance(response['response'], dict)

    def test_do_request_input_validation(self):
        artist_url = 'https://musicbrainz.org/ws/2/artist/65f4f0c5-ef9e-490c-aee3-909e7ae6b2ab'
        self.assertRaises(ValueError, musicbrainz._do_request, None)
        self.assertRaises(ValueError, musicbrainz._do_request, '')
        musicbrainz._headers['user-agent'] = None
        self.assertRaises(ValueError, musicbrainz._do_request, artist_url)

    def test_cache(self):
        def fun():
            return {}

        musicbrainz.cache(fun)()
        self.assertTrue(redis.Redis().keys('*') is not None)
        self.assertEquals(musicbrainz.cache(fun)(), {})

        redis.Redis().set('fun, [[], {}]', '{"test": true}')
        self.assertEquals(musicbrainz.cache(fun)(), {"test": True})

        def fun(a, b):
            return {}

        musicbrainz.cache(fun)('word', [''])