from unittest import TestCase

from typish import LiteralAlias


class TestLiteralMeta(TestCase):
    def test_from_literal(self):

        class LiteralMock:
            __args__ = (42,)

        alias = LiteralAlias.from_literal(LiteralMock)

        self.assertTrue(isinstance(42, alias))

    def test_str(self):
        self.assertEqual('Literal[42]', str(LiteralAlias[42]))

    def test_multiple_args(self):
        self.assertTrue(isinstance(1, LiteralAlias[1, 2]))
        self.assertTrue(isinstance(2, LiteralAlias[1, 2]))
        self.assertTrue(isinstance(1, LiteralAlias[(1, 2)]))
        self.assertTrue(isinstance(2, LiteralAlias[(1, 2)]))
        self.assertTrue(isinstance(1, LiteralAlias[((1, 2),)]))
        self.assertTrue(isinstance(2, LiteralAlias[((1, 2),)]))