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import unittest
from datetime import datetime
from google.appengine.ext import testbed

from model.activeworkitems import ActiveWorkItems


class ActiveWorkItemsTest(unittest.TestCase):

    def setUp(self):
        self.testbed = testbed.Testbed()
        self.testbed.activate()
        self.testbed.init_datastore_v3_stub()
        self.testbed.init_memcache_stub()

    def tearDown(self):
        self.testbed.deactivate()

    def test_basic(self):
        items = ActiveWorkItems.lookup_by_queue("test-queue")
        queued_items = [1, 2]
        # db.Model only stores dates to second resolution, so we use an explicit datetime without milliseconds.
        time = datetime(2011, 4, 18, 18, 50, 44)
        self.assertEqual(items.next_item(queued_items, time), 1)
        self.assertEqual(items.next_item([1], time), None)
        self.assertEqual(items.next_item([], time), None)

        self.assertEqual(items.time_for_item(1), time)
        self.assertEqual(items.time_for_item(2), None)

        items.expire_item(1)
        # expire_item uses a transaction so it doesn't take effect on the current object.
        self.assertEqual(items.time_for_item(1), time)
        # If we look up the saved object, we see it's been updated.
        items = ActiveWorkItems.lookup_by_queue("test-queue")
        self.assertEqual(items.time_for_item(1), None)