from django.test import SimpleTestCase

from django.utils.hashable import make_hashable

class TestHashable(SimpleTestCase):

    def test_equal(self):

        tests = (

            ([], ()),

            (["a", 1], ("a", 1)),

            ({}, ()),

            ({"a"}, ("a",)),

            (frozenset({"a"}), {"a"}),

            ({"a": 1, "b": 2}, (("a", 1), ("b", 2))),

            ({"b": 2, "a": 1}, (("a", 1), ("b", 2))),

            (("a", ["b", 1]), ("a", ("b", 1))),

            (("a", {"b": 1}), ("a", (("b", 1),))),

        )

        for value, expected in tests:

            with self.subTest(value=value):

                self.assertEqual(make_hashable(value), expected)

    def test_count_equal(self):

        tests = (

            ({"a": 1, "b": ["a", 1]}, (("a", 1), ("b", ("a", 1)))),

            ({"a": 1, "b": ("a", [1, 2])}, (("a", 1), ("b", ("a", (1, 2))))),

        )

        for value, expected in tests:

            with self.subTest(value=value):

                self.assertCountEqual(make_hashable(value), expected)

    def test_unhashable(self):

        class Unhashable:

            __hash__ = None

        with self.assertRaisesMessage(TypeError, "unhashable type: 'Unhashable'"):

            make_hashable(Unhashable())