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import copy
import pytest
from scrapy.http import Headers
class TestHeaders:
def assertSortedEqual(self, first, second, msg=None):
assert sorted(first) == sorted(second), msg
def test_basics(self):
h = Headers({"Content-Type": "text/html", "Content-Length": 1234})
assert h["Content-Type"]
assert h["Content-Length"]
with pytest.raises(KeyError):
h["Accept"]
assert h.get("Accept") is None
assert h.getlist("Accept") == []
assert h.get("Accept", "*/*") == b"*/*"
assert h.getlist("Accept", "*/*") == [b"*/*"]
assert h.getlist("Accept", ["text/html", "images/jpeg"]) == [
b"text/html",
b"images/jpeg",
]
def test_single_value(self):
h = Headers()
h["Content-Type"] = "text/html"
assert h["Content-Type"] == b"text/html"
assert h.get("Content-Type") == b"text/html"
assert h.getlist("Content-Type") == [b"text/html"]
def test_multivalue(self):
h = Headers()
h["X-Forwarded-For"] = hlist = ["ip1", "ip2"]
assert h["X-Forwarded-For"] == b"ip2"
assert h.get("X-Forwarded-For") == b"ip2"
assert h.getlist("X-Forwarded-For") == [b"ip1", b"ip2"]
assert h.getlist("X-Forwarded-For") is not hlist
def test_multivalue_for_one_header(self):
h = Headers((("a", "b"), ("a", "c")))
assert h["a"] == b"c"
assert h.get("a") == b"c"
assert h.getlist("a") == [b"b", b"c"]
def test_encode_utf8(self):
h = Headers({"key": "\xa3"}, encoding="utf-8")
key, val = dict(h).popitem()
assert isinstance(key, bytes), key
assert isinstance(val[0], bytes), val[0]
assert val[0] == b"\xc2\xa3"
def test_encode_latin1(self):
h = Headers({"key": "\xa3"}, encoding="latin1")
key, val = dict(h).popitem()
assert val[0] == b"\xa3"
def test_encode_multiple(self):
h = Headers({"key": ["\xa3"]}, encoding="utf-8")
key, val = dict(h).popitem()
assert val[0] == b"\xc2\xa3"
def test_delete_and_contains(self):
h = Headers()
h["Content-Type"] = "text/html"
assert "Content-Type" in h
del h["Content-Type"]
assert "Content-Type" not in h
def test_setdefault(self):
h = Headers()
hlist = ["ip1", "ip2"]
olist = h.setdefault("X-Forwarded-For", hlist)
assert h.getlist("X-Forwarded-For") is not hlist
assert h.getlist("X-Forwarded-For") is olist
h = Headers()
olist = h.setdefault("X-Forwarded-For", "ip1")
assert h.getlist("X-Forwarded-For") == [b"ip1"]
assert h.getlist("X-Forwarded-For") is olist
def test_iterables(self):
idict = {"Content-Type": "text/html", "X-Forwarded-For": ["ip1", "ip2"]}
h = Headers(idict)
assert dict(h) == {
b"Content-Type": [b"text/html"],
b"X-Forwarded-For": [b"ip1", b"ip2"],
}
self.assertSortedEqual(h.keys(), [b"X-Forwarded-For", b"Content-Type"])
self.assertSortedEqual(
h.items(),
[(b"X-Forwarded-For", [b"ip1", b"ip2"]), (b"Content-Type", [b"text/html"])],
)
self.assertSortedEqual(h.values(), [b"ip2", b"text/html"])
def test_update(self):
h = Headers()
h.update({"Content-Type": "text/html", "X-Forwarded-For": ["ip1", "ip2"]})
assert h.getlist("Content-Type") == [b"text/html"]
assert h.getlist("X-Forwarded-For") == [b"ip1", b"ip2"]
def test_copy(self):
h1 = Headers({"header1": ["value1", "value2"]})
h2 = copy.copy(h1)
assert h1 == h2
assert h1.getlist("header1") == h2.getlist("header1")
assert h1.getlist("header1") is not h2.getlist("header1")
assert isinstance(h2, Headers)
def test_appendlist(self):
h1 = Headers({"header1": "value1"})
h1.appendlist("header1", "value3")
assert h1.getlist("header1") == [b"value1", b"value3"]
h1 = Headers()
h1.appendlist("header1", "value1")
h1.appendlist("header1", "value3")
assert h1.getlist("header1") == [b"value1", b"value3"]
def test_setlist(self):
h1 = Headers({"header1": "value1"})
assert h1.getlist("header1") == [b"value1"]
h1.setlist("header1", [b"value2", b"value3"])
assert h1.getlist("header1") == [b"value2", b"value3"]
def test_setlistdefault(self):
h1 = Headers({"header1": "value1"})
h1.setlistdefault("header1", ["value2", "value3"])
h1.setlistdefault("header2", ["value2", "value3"])
assert h1.getlist("header1") == [b"value1"]
assert h1.getlist("header2") == [b"value2", b"value3"]
def test_none_value(self):
h1 = Headers()
h1["foo"] = "bar"
h1["foo"] = None
h1.setdefault("foo", "bar")
assert h1.get("foo") is None
assert h1.getlist("foo") == []
def test_int_value(self):
h1 = Headers({"hey": 5})
h1["foo"] = 1
h1.setdefault("bar", 2)
h1.setlist("buz", [1, "dos", 3])
assert h1.getlist("foo") == [b"1"]
assert h1.getlist("bar") == [b"2"]
assert h1.getlist("buz") == [b"1", b"dos", b"3"]
assert h1.getlist("hey") == [b"5"]
def test_invalid_value(self):
with pytest.raises(TypeError, match="Unsupported value type"):
Headers({"foo": object()})
with pytest.raises(TypeError, match="Unsupported value type"):
Headers()["foo"] = object()
with pytest.raises(TypeError, match="Unsupported value type"):
Headers().setdefault("foo", object())
with pytest.raises(TypeError, match="Unsupported value type"):
Headers().setlist("foo", [object()])
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