from django.test import TestCase
from unittest import mock
from app.utils import verify_date
import datetime

# Create your tests here.
class StubDate(datetime.datetime):
    pass


class TestApp(TestCase):
    """Test app utils.

    Publish time: datetime.datetime(2021, 2, 14, 12, 30)
    """

    @mock.patch('app.utils.datetime.datetime', StubDate)
    def test_today_before_publish_time(self):
        StubDate.now = classmethod(lambda cls: datetime.datetime(2021, 2, 12, 8, 0, 0))
        date, _ = verify_date('2021-02-12', '')
        self.assertEqual(date.date(), datetime.datetime(2021, 2, 11).date())

    @mock.patch('app.utils.datetime.datetime', StubDate)
    def test_today_after_publish_time(self):
        StubDate.now = classmethod(lambda cls: datetime.datetime(2021, 2, 12, 13, 0, 0))
        date, _ = verify_date('2021-02-14', '')
        self.assertEqual(date.date(), datetime.datetime(2021, 2, 12).date())

    @mock.patch('app.utils.datetime.datetime', StubDate)
    def test_weekend_returns_friday(self):
        StubDate.now = classmethod(lambda cls: datetime.datetime(2021, 2, 14, 13, 0, 0))
        date, _ = verify_date('2021-02-14', '')
        self.assertEqual(date.date(), datetime.datetime(2021, 2, 12).date())

    @mock.patch('app.utils.datetime.datetime', StubDate)
    def test_a_future_date(self):
        StubDate.now = classmethod(lambda cls: datetime.datetime(2021, 2, 15, 13, 0, 0))
        date, _ = verify_date('2021-02-20', '')
        self.assertEqual(date.date(), datetime.datetime(2021, 2, 15).date())

    @mock.patch('app.utils.datetime.datetime', StubDate)
    def test_monday_before_publish_time(self):
        StubDate.now = classmethod(lambda cls: datetime.datetime(2021, 2, 15, 8, 0, 0))
        date, _ = verify_date('2021-02-15', '')
        self.assertEqual(date.date(), datetime.datetime(2021, 2, 12).date())