from django.template.defaultfilters import truncatewords
from django.test import SimpleTestCase
from django.utils.safestring import mark_safe

from ..utils import setup


class TruncatewordsTests(SimpleTestCase):

    @setup({
        'truncatewords01': '{% autoescape off %}{{ a|truncatewords:"2" }} {{ b|truncatewords:"2"}}{% endautoescape %}'
    })
    def test_truncatewords01(self):
        output = self.engine.render_to_string(
            'truncatewords01', {'a': 'alpha & bravo', 'b': mark_safe('alpha & bravo')}
        )
        self.assertEqual(output, 'alpha & ... alpha & ...')

    @setup({'truncatewords02': '{{ a|truncatewords:"2" }} {{ b|truncatewords:"2"}}'})
    def test_truncatewords02(self):
        output = self.engine.render_to_string(
            'truncatewords02', {'a': 'alpha & bravo', 'b': mark_safe('alpha & bravo')}
        )
        self.assertEqual(output, 'alpha & ... alpha & ...')


class FunctionTests(SimpleTestCase):

    def test_truncate(self):
        self.assertEqual(truncatewords('A sentence with a few words in it', 1), 'A ...')

    def test_truncate2(self):
        self.assertEqual(
            truncatewords('A sentence with a few words in it', 5),
            'A sentence with a few ...',
        )

    def test_overtruncate(self):
        self.assertEqual(
            truncatewords('A sentence with a few words in it', 100),
            'A sentence with a few words in it',
        )

    def test_invalid_number(self):
        self.assertEqual(
            truncatewords('A sentence with a few words in it', 'not a number'),
            'A sentence with a few words in it',
        )

    def test_non_string_input(self):
        self.assertEqual(truncatewords(123, 2), '123')