import pytest

from webob import headers


def test_ResponseHeaders_delitem_notpresent():
    """Deleting a missing key from ResponseHeaders should raise a KeyError"""
    d = headers.ResponseHeaders()
    with pytest.raises(KeyError):
        d.__delitem__("b")


def test_ResponseHeaders_delitem_present():
    """
    Deleting a present key should not raise an error at all
    """
    d = headers.ResponseHeaders(a=1)
    del d["a"]
    assert "a" not in d


def test_ResponseHeaders_setdefault():
    """Testing set_default for ResponseHeaders"""
    d = headers.ResponseHeaders(a=1)
    res = d.setdefault("b", 1)
    assert res == d["b"] == 1
    res = d.setdefault("b", 10)
    assert res == d["b"] == 1
    res = d.setdefault("B", 10)
    assert res == d["b"] == d["B"] == 1


def test_ResponseHeader_pop():
    """Testing if pop return TypeError when more than len(*args)>1 plus other
    assorted tests"""
    d = headers.ResponseHeaders(a=1, b=2, c=3, d=4)
    with pytest.raises(TypeError):
        d.pop("a", "z", "y")
    assert d.pop("a") == 1
    assert "a" not in d
    assert d.pop("B") == 2
    assert "b" not in d
    assert d.pop("c", "u") == 3
    assert "c" not in d
    assert d.pop("e", "u") == "u"
    assert "e" not in d
    with pytest.raises(KeyError):
        d.pop("z")


def test_ResponseHeaders_getitem_miss():
    d = headers.ResponseHeaders()
    with pytest.raises(KeyError):
        d.__getitem__("a")


def test_ResponseHeaders_getall():
    d = headers.ResponseHeaders()
    d.add("a", 1)
    d.add("a", 2)
    result = d.getall("a")
    assert result == [1, 2]


def test_ResponseHeaders_mixed():
    d = headers.ResponseHeaders()
    d.add("a", 1)
    d.add("a", 2)
    d["b"] = 1
    result = d.mixed()
    assert result == {"a": [1, 2], "b": 1}


def test_ResponseHeaders_setitem_scalar_replaces_seq():
    d = headers.ResponseHeaders()
    d.add("a", 2)
    d["a"] = 1
    result = d.getall("a")
    assert result == [1]


def test_ResponseHeaders_contains():
    d = headers.ResponseHeaders()
    d["a"] = 1
    assert "a" in d
    assert "b" not in d


def test_EnvironHeaders_delitem():
    d = headers.EnvironHeaders({"CONTENT_LENGTH": "10"})
    del d["CONTENT-LENGTH"]
    assert not d
    with pytest.raises(KeyError):
        d.__delitem__("CONTENT-LENGTH")


def test_EnvironHeaders_getitem():
    d = headers.EnvironHeaders({"CONTENT_LENGTH": "10"})
    assert d["CONTENT-LENGTH"] == "10"


def test_EnvironHeaders_setitem():
    d = headers.EnvironHeaders({})
    d["abc"] = "10"
    assert d["abc"] == "10"


def test_EnvironHeaders_contains():
    d = headers.EnvironHeaders({})
    d["a"] = "10"
    assert "a" in d
    assert "b" not in d


def test__trans_key_not_basestring():
    result = headers._trans_key(None)
    assert result is None


def test__trans_key_not_a_header():
    result = headers._trans_key("")
    assert result is None


def test__trans_key_key2header():
    result = headers._trans_key("CONTENT_TYPE")
    assert result == "Content-Type"


def test__trans_key_httpheader():
    result = headers._trans_key("HTTP_FOO_BAR")
    assert result == "Foo-Bar"