from unittest import TestCase
from collections import defaultdict

from elasticsearch import Elasticsearch

class DummyTransport(object):
    def __init__(self, hosts, responses=None, **kwargs):
        self.responses = responses
        self.call_count = 0
        self.calls = defaultdict(list)

    def perform_request(self, method, url, params=None, body=None):
        resp = 200, {}
        if self.responses:
            resp = self.responses[self.call_count]
        self.call_count += 1
        self.calls[(method, url)].append((params, body))
        return resp


class ElasticsearchTestCase(TestCase):
    def setUp(self):
        super(ElasticsearchTestCase, self).setUp()
        self.client = Elasticsearch(transport_class=DummyTransport)

    def assert_call_count_equals(self, count):
        self.assertEquals(count, self.client.transport.call_count)

    def assert_url_called(self, method, url, count=1):
        self.assertIn((method, url), self.client.transport.calls)
        calls = self.client.transport.calls[(method, url)]
        self.assertEquals(count, len(calls))
        return calls


class TestElasticsearchTestCase(ElasticsearchTestCase):
    def test_our_transport_used(self):
        self.assertIsInstance(self.client.transport, DummyTransport)

    def test_start_with_0_call(self):
        self.assert_call_count_equals(0)

    def test_each_call_is_recorded(self):
        self.client.transport.perform_request('GET', '/')
        self.client.transport.perform_request('DELETE', '/42', params={}, body='body')
        self.assert_call_count_equals(2)
        self.assertEquals([({}, 'body')], self.assert_url_called('DELETE', '/42', 1))