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"""
Selector tests for cssselect backend
"""
import unittest
from typing import Any, Callable, List, Protocol, Tuple, Type, Union
import cssselect
import pytest
from cssselect.parser import SelectorSyntaxError
from cssselect.xpath import ExpressionError
from packaging.version import Version
from parsel import Selector
from parsel.csstranslator import GenericTranslator, HTMLTranslator, TranslatorProtocol
HTMLBODY = """
<html>
<body>
<div>
<a id="name-anchor" name="foo"></a>
<a id="tag-anchor" rel="tag" href="http://localhost/foo">link</a>
<a id="nofollow-anchor" rel="nofollow" href="https://example.org"> link</a>
<p id="paragraph">
lorem ipsum text
<b id="p-b">hi</b> <em id="p-em">there</em>
<b id="p-b2">guy</b>
<input type="checkbox" id="checkbox-unchecked" />
<input type="checkbox" id="checkbox-disabled" disabled="" />
<input type="text" id="text-checked" checked="checked" />
<input type="hidden" />
<input type="hidden" disabled="disabled" />
<input type="checkbox" id="checkbox-checked" checked="checked" />
<input type="checkbox" id="checkbox-disabled-checked"
disabled="disabled" checked="checked" />
<fieldset id="fieldset" disabled="disabled">
<input type="checkbox" id="checkbox-fieldset-disabled" />
<input type="hidden" />
</fieldset>
</p>
<map name="dummymap">
<area shape="circle" coords="200,250,25" href="foo.html" id="area-href" />
<area shape="default" id="area-nohref" />
</map>
</div>
<div class="cool-footer" id="foobar-div" foobar="ab bc cde">
<span id="foobar-span">foo ter</span>
</div>
</body></html>
"""
class TranslatorTestProtocol(Protocol):
tr_cls: Type[TranslatorProtocol]
tr: TranslatorProtocol
def c2x(self, css: str, prefix: str = ...) -> str:
pass
def assertEqual(self, first: Any, second: Any, msg: Any = ...) -> None:
pass
def assertRaises(
self,
expected_exception: Union[Type[BaseException], Tuple[Type[BaseException], ...]],
callable: Callable[..., object],
*args: Any,
**kwargs: Any,
) -> None:
pass
class TranslatorTestMixin:
def setUp(self: TranslatorTestProtocol) -> None:
self.tr = self.tr_cls()
self.c2x = self.tr.css_to_xpath
def test_attr_function(self: TranslatorTestProtocol) -> None:
cases = [
("::attr(name)", "descendant-or-self::*/@name"),
("a::attr(href)", "descendant-or-self::a/@href"),
(
"a ::attr(img)",
"descendant-or-self::a/descendant-or-self::*/@img",
),
("a > ::attr(class)", "descendant-or-self::a/*/@class"),
]
for css, xpath in cases:
self.assertEqual(self.c2x(css), xpath, css)
def test_attr_function_exception(self: TranslatorTestProtocol) -> None:
cases = [
("::attr(12)", ExpressionError),
("::attr(34test)", ExpressionError),
("::attr(@href)", SelectorSyntaxError),
]
for css, exc in cases:
self.assertRaises(exc, self.c2x, css)
def test_text_pseudo_element(self: TranslatorTestProtocol) -> None:
cases = [
("::text", "descendant-or-self::text()"),
("p::text", "descendant-or-self::p/text()"),
("p ::text", "descendant-or-self::p/descendant-or-self::text()"),
("#id::text", "descendant-or-self::*[@id = 'id']/text()"),
("p#id::text", "descendant-or-self::p[@id = 'id']/text()"),
(
"p#id ::text",
"descendant-or-self::p[@id = 'id']/descendant-or-self::text()",
),
("p#id > ::text", "descendant-or-self::p[@id = 'id']/*/text()"),
(
"p#id ~ ::text",
"descendant-or-self::p[@id = 'id']/following-sibling::*/text()",
),
("a[href]::text", "descendant-or-self::a[@href]/text()"),
(
"a[href] ::text",
"descendant-or-self::a[@href]/descendant-or-self::text()",
),
(
"p::text, a::text",
"descendant-or-self::p/text() | descendant-or-self::a/text()",
),
]
for css, xpath in cases:
self.assertEqual(self.c2x(css), xpath, css)
def test_pseudo_function_exception(self: TranslatorTestProtocol) -> None:
cases = [
("::attribute(12)", ExpressionError),
("::text()", ExpressionError),
("::attr(@href)", SelectorSyntaxError),
]
for css, exc in cases:
self.assertRaises(exc, self.c2x, css)
def test_unknown_pseudo_element(self: TranslatorTestProtocol) -> None:
cases = [
("::text-node", ExpressionError),
]
for css, exc in cases:
self.assertRaises(exc, self.c2x, css)
def test_unknown_pseudo_class(self: TranslatorTestProtocol) -> None:
cases = [
(":text", ExpressionError),
(":attribute(name)", ExpressionError),
]
for css, exc in cases:
self.assertRaises(exc, self.c2x, css)
class HTMLTranslatorTest(TranslatorTestMixin, unittest.TestCase):
tr_cls = HTMLTranslator
class GenericTranslatorTest(TranslatorTestMixin, unittest.TestCase):
tr_cls = GenericTranslator
class UtilCss2XPathTest(unittest.TestCase):
def test_css2xpath(self) -> None:
from parsel import css2xpath
expected_xpath = (
"descendant-or-self::*[@class and contains("
"concat(' ', normalize-space(@class), ' '), ' some-class ')]"
)
self.assertEqual(css2xpath(".some-class"), expected_xpath)
class CSSSelectorTest(unittest.TestCase):
sscls = Selector
def setUp(self) -> None:
self.sel = self.sscls(text=HTMLBODY)
def x(self, *a: Any, **kw: Any) -> List[str]:
return [v.strip() for v in self.sel.css(*a, **kw).extract() if v.strip()]
def test_selector_simple(self) -> None:
for x in self.sel.css("input"):
self.assertTrue(isinstance(x, self.sel.__class__), x)
self.assertEqual(
self.sel.css("input").extract(),
[x.extract() for x in self.sel.css("input")],
)
def test_text_pseudo_element(self) -> None:
self.assertEqual(self.x("#p-b2"), ['<b id="p-b2">guy</b>'])
self.assertEqual(self.x("#p-b2::text"), ["guy"])
self.assertEqual(self.x("#p-b2 ::text"), ["guy"])
self.assertEqual(self.x("#paragraph::text"), ["lorem ipsum text"])
self.assertEqual(
self.x("#paragraph ::text"),
["lorem ipsum text", "hi", "there", "guy"],
)
self.assertEqual(self.x("p::text"), ["lorem ipsum text"])
self.assertEqual(self.x("p ::text"), ["lorem ipsum text", "hi", "there", "guy"])
def test_attribute_function(self) -> None:
self.assertEqual(self.x("#p-b2::attr(id)"), ["p-b2"])
self.assertEqual(self.x(".cool-footer::attr(class)"), ["cool-footer"])
self.assertEqual(
self.x(".cool-footer ::attr(id)"), ["foobar-div", "foobar-span"]
)
self.assertEqual(
self.x('map[name="dummymap"] ::attr(shape)'), ["circle", "default"]
)
def test_nested_selector(self) -> None:
self.assertEqual(self.sel.css("p").css("b::text").extract(), ["hi", "guy"])
self.assertEqual(
self.sel.css("div").css("area:last-child").extract(),
['<area shape="default" id="area-nohref">'],
)
@pytest.mark.xfail(
Version(cssselect.__version__) < Version("1.2.0"),
reason="Support added in cssselect 1.2.0",
)
def test_pseudoclass_has(self) -> None:
self.assertEqual(self.x("p:has(b)::text"), ["lorem ipsum text"])
class CSSSelectorTestBytes(CSSSelectorTest):
def setUp(self) -> None:
self.sel = self.sscls(body=bytes(HTMLBODY, encoding="utf-8"))
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