import pytest

from requests.structures import CaseInsensitiveDict, LookupDict


class TestCaseInsensitiveDict:
    @pytest.fixture(autouse=True)
    def setup(self):
        """CaseInsensitiveDict instance with "Accept" header."""
        self.case_insensitive_dict = CaseInsensitiveDict()
        self.case_insensitive_dict["Accept"] = "application/json"

    def test_list(self):
        assert list(self.case_insensitive_dict) == ["Accept"]

    possible_keys = pytest.mark.parametrize(
        "key", ("accept", "ACCEPT", "aCcEpT", "Accept")
    )

    @possible_keys
    def test_getitem(self, key):
        assert self.case_insensitive_dict[key] == "application/json"

    @possible_keys
    def test_delitem(self, key):
        del self.case_insensitive_dict[key]
        assert key not in self.case_insensitive_dict

    def test_lower_items(self):
        assert list(self.case_insensitive_dict.lower_items()) == [
            ("accept", "application/json")
        ]

    def test_repr(self):
        assert repr(self.case_insensitive_dict) == "{'Accept': 'application/json'}"

    def test_copy(self):
        copy = self.case_insensitive_dict.copy()
        assert copy is not self.case_insensitive_dict
        assert copy == self.case_insensitive_dict

    @pytest.mark.parametrize(
        "other, result",
        (
            ({"AccePT": "application/json"}, True),
            ({}, False),
            (None, False),
        ),
    )
    def test_instance_equality(self, other, result):
        assert (self.case_insensitive_dict == other) is result


class TestLookupDict:
    @pytest.fixture(autouse=True)
    def setup(self):
        """LookupDict instance with "bad_gateway" attribute."""
        self.lookup_dict = LookupDict("test")
        self.lookup_dict.bad_gateway = 502

    def test_repr(self):
        assert repr(self.lookup_dict) == "<lookup 'test'>"

    get_item_parameters = pytest.mark.parametrize(
        "key, value",
        (
            ("bad_gateway", 502),
            ("not_a_key", None),
        ),
    )

    @get_item_parameters
    def test_getitem(self, key, value):
        assert self.lookup_dict[key] == value

    @get_item_parameters
    def test_get(self, key, value):
        assert self.lookup_dict.get(key) == value