from decimal import Decimal

from django.template.defaultfilters import pluralize
from django.test import SimpleTestCase

from ..utils import setup


class PluralizeTests(SimpleTestCase):

    def check_values(self, *tests):
        for value, expected in tests:
            with self.subTest(value=value):
                output = self.engine.render_to_string('t', {'value': value})
                self.assertEqual(output, expected)

    @setup({'t': 'vote{{ value|pluralize }}'})
    def test_no_arguments(self):
        self.check_values(('0', 'votes'), ('1', 'vote'), ('2', 'votes'))

    @setup({'t': 'class{{ value|pluralize:"es" }}'})
    def test_suffix(self):
        self.check_values(('0', 'classes'), ('1', 'class'), ('2', 'classes'))

    @setup({'t': 'cand{{ value|pluralize:"y,ies" }}'})
    def test_singular_and_plural_suffix(self):
        self.check_values(('0', 'candies'), ('1', 'candy'), ('2', 'candies'))


class FunctionTests(SimpleTestCase):

    def test_integers(self):
        self.assertEqual(pluralize(1), '')
        self.assertEqual(pluralize(0), 's')
        self.assertEqual(pluralize(2), 's')

    def test_floats(self):
        self.assertEqual(pluralize(0.5), 's')
        self.assertEqual(pluralize(1.5), 's')

    def test_decimals(self):
        self.assertEqual(pluralize(Decimal(1)), '')
        self.assertEqual(pluralize(Decimal(0)), 's')
        self.assertEqual(pluralize(Decimal(2)), 's')

    def test_lists(self):
        self.assertEqual(pluralize([1]), '')
        self.assertEqual(pluralize([]), 's')
        self.assertEqual(pluralize([1, 2, 3]), 's')

    def test_suffixes(self):
        self.assertEqual(pluralize(1, 'es'), '')
        self.assertEqual(pluralize(0, 'es'), 'es')
        self.assertEqual(pluralize(2, 'es'), 'es')
        self.assertEqual(pluralize(1, 'y,ies'), 'y')
        self.assertEqual(pluralize(0, 'y,ies'), 'ies')
        self.assertEqual(pluralize(2, 'y,ies'), 'ies')
        self.assertEqual(pluralize(0, 'y,ies,error'), '')

    def test_no_len_type(self):
        self.assertEqual(pluralize(object(), 'y,es'), 'y')
        self.assertEqual(pluralize(object(), 'es'), '')

    def test_value_error(self):
        self.assertEqual(pluralize('', 'y,es'), 'y')