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#!/usr/bin/env python
# coding: utf8
"""
Tests for cssselect
===================

These tests can be run either by py.test or by the standard library's
unittest. They use plain ``assert`` statements and do little reporting
themselves in case of failure.

Use py.test to get fancy error reporting and assert introspection.


:copyright: (c) 2007-2012 Ian Bicking and contributors.
See AUTHORS for more details.
:license: BSD, see LICENSE for more details.

"""

import sys
import unittest

from lxml import etree, html
from cssselect import (parse, GenericTranslator, HTMLTranslator,
                       SelectorSyntaxError, ExpressionError)
from cssselect.parser import tokenize, parse_series


class TestCssselect(unittest.TestCase):
    def test_tokenizer(self):
        tokens = [repr(item).replace("u'", "'")
                  for item in tokenize('E > f[a~="y\\"x"]')]
        assert tokens == [
            "Symbol('E', 0)",
            "Token(' ', 1)",
            "Token('>', 2)",
            "Token(' ', 3)",
            "Symbol('f', 4)",
            "Token('[', 5)",
            "Symbol('a', 6)",
            "Token('~=', 7)",
            "String('y\"x', 9)",
            "Token(']', 15)"]

    def test_parser(self):
        def repr_parse(css):
            selectors = parse(css)
            for selector in selectors:
                assert selector.pseudo_element is None
            return [repr(selector.parsed_tree).replace("(u'", "('")
                    for selector in selectors]

        def parse_many(first, *others):
            result = repr_parse(first)
            for other in others:
                assert repr_parse(other) == result
            return result

        assert parse_many('*') == ['Element[*]']
        assert parse_many('*|*') == ['Element[*]']
        assert parse_many('*|foo') == ['Element[foo]']
        assert parse_many('foo|*') == ['Element[foo|*]']
        assert parse_many('foo|bar') == ['Element[foo|bar]']
        # This will never match, but it is valid:
        assert parse_many('#foo#bar') == ['Hash[Hash[Element[*]#foo]#bar]']
        assert parse_many(
            'div>.foo',
            'div> .foo',
            'div >.foo',
            'div > .foo',
            'div \n> \t \t .foo', 'div\r>\n\n\n.foo', 'div\f>\f.foo'
        ) == ['CombinedSelector[Element[div] > Class[Element[*].foo]]']
        assert parse_many('td.foo,.bar',
            'td.foo, .bar',
            'td.foo\t\r\n\f ,\t\r\n\f .bar'
        ) == [
            'Class[Element[td].foo]',
            'Class[Element[*].bar]'
        ]
        assert parse_many('div, td.foo, div.bar span') == [
            'Element[div]',
            'Class[Element[td].foo]',
            'CombinedSelector[Class[Element[div].bar] '
                '<followed> Element[span]]']
        assert parse_many('div > p') == [
            'CombinedSelector[Element[div] > Element[p]]']
        assert parse_many('td:first') == [
            'Pseudo[Element[td]:first]']
        assert parse_many('td:first') == [
            'Pseudo[Element[td]:first]']
        assert parse_many('td :first') == [
            'CombinedSelector[Element[td] '
                '<followed> Pseudo[Element[*]:first]]']
        assert parse_many('td :first') == [
            'CombinedSelector[Element[td] '
                '<followed> Pseudo[Element[*]:first]]']
        assert parse_many('a[name]', 'a[ name\t]') == [
            'Attrib[Element[a][name]]']
        assert parse_many('a [name]') == [
            'CombinedSelector[Element[a] <followed> Attrib[Element[*][name]]]']
        assert parse_many('a[rel="include"]') == [
            "Attrib[Element[a][rel = String('include', 6)]]"]
        assert parse_many('a[rel = include]') == [
            "Attrib[Element[a][rel = Symbol('include', 8)]]"]
        assert parse_many("a[hreflang |= 'en']") == [
            "Attrib[Element[a][hreflang |= String('en', 14)]]"]
        assert parse_many('div:nth-child(10)') == [
            "Function[Element[div]:nth-child(Symbol('10', 14))]"]
        assert parse_many(':nth-child(2n+2)') == [
            "Function[Element[*]:nth-child(Symbol('2n+2', 11))]"]
        assert parse_many('div:nth-of-type(10)') == [
            "Function[Element[div]:nth-of-type(Symbol('10', 16))]"]
        assert parse_many('div div:nth-of-type(10) .aclass') == [
            'CombinedSelector[CombinedSelector[Element[div] <followed> '
                "Function[Element[div]:nth-of-type(Symbol('10', 20))]] "
                '<followed> Class[Element[*].aclass]]']
        assert parse_many('label:only') == [
            'Pseudo[Element[label]:only]']
        assert parse_many('a:lang(fr)') == [
            "Function[Element[a]:lang(Symbol('fr', 7))]"]
        assert parse_many('div:contains("foo")') == [
            "Function[Element[div]:contains(String('foo', 13))]"]
        assert parse_many('div#foobar') == [
            'Hash[Element[div]#foobar]']
        assert parse_many('div:not(div.foo)') == [
            'Negation[Element[div]:not(Class[Element[div].foo])]']
        assert parse_many('td ~ th') == [
            'CombinedSelector[Element[td] ~ Element[th]]']

    def test_pseudo_elements(self):
        def parse_pseudo(css):
            result = []
            for selector in parse(css):
                result.append((
                    repr(selector.parsed_tree).replace("(u'", "('"),
                    selector.pseudo_element))
            return result

        def parse_one(css):
            result = parse_pseudo(css)
            assert len(result) == 1
            return result[0]

        assert parse_one('foo') == ('Element[foo]', None)
        assert parse_one('*') == ('Element[*]', None)
        assert parse_one(':empty') == ('Pseudo[Element[*]:empty]', None)

        # Special cases for CSS 2.1 pseudo-elements
        assert parse_one(':before') == ('Element[*]', 'before')
        assert parse_one(':after') == ('Element[*]', 'after')
        assert parse_one(':first-line') == ('Element[*]', 'first-line')
        assert parse_one(':first-letter') == ('Element[*]', 'first-letter')

        assert parse_one('::before') == ('Element[*]', 'before')
        assert parse_one('::after') == ('Element[*]', 'after')
        assert parse_one('::first-line') == ('Element[*]', 'first-line')
        assert parse_one('::first-letter') == ('Element[*]', 'first-letter')

        assert parse_one('::selection') == ('Element[*]', 'selection')
        assert parse_one('foo:after') == ('Element[foo]', 'after')
        assert parse_one('foo::selection') == ('Element[foo]', 'selection')
        assert parse_one('lorem#ipsum ~ a#b.c[href]:empty::selection') == (
            'CombinedSelector[Hash[Element[lorem]#ipsum] ~ '
                'Pseudo[Attrib[Class[Hash[Element[a]#b].c][href]]:empty]]',
            'selection')

        parse_pseudo('foo:before, bar, baz:after') == [
            ('Element[foo]', 'before'),
            ('Element[bar]', None),
            ('Element[baz]', 'after')]

    def test_specificity(self):
        def specificity(css):
            selectors = parse(css)
            assert len(selectors) == 1
            return selectors[0].specificity()

        assert specificity('*') == (0, 0, 0)
        assert specificity(' foo') == (0, 0, 1)
        assert specificity(':empty ') == (0, 1, 0)
        assert specificity(':before') == (0, 0, 1)
        assert specificity('*:before') == (0, 0, 1)
        assert specificity(':nth-child(2)') == (0, 1, 0)
        assert specificity('.bar') == (0, 1, 0)
        assert specificity('[baz]') == (0, 1, 0)
        assert specificity('[baz="4"]') == (0, 1, 0)
        assert specificity('[baz^="4"]') == (0, 1, 0)
        assert specificity('#lipsum') == (1, 0, 0)

        assert specificity(':not(*)') == (0, 0, 0)
        assert specificity(':not(foo)') == (0, 0, 1)
        assert specificity(':not(.foo)') == (0, 1, 0)
        assert specificity(':not([foo])') == (0, 1, 0)
        assert specificity(':not(:empty)') == (0, 1, 0)
        assert specificity(':not(#foo)') == (1, 0, 0)

        assert specificity('foo:empty') == (0, 1, 1)
        assert specificity('foo:before') == (0, 0, 2)
        assert specificity('foo::before') == (0, 0, 2)
        assert specificity('foo:empty::before') == (0, 1, 2)

        assert specificity('#lorem + foo#ipsum:first-child > bar:first-line'
            ) == (2, 1, 3)

    def test_parse_errors(self):
        def get_error(css):
            try:
                parse(css)
            except SelectorSyntaxError:
                # Py2, Py3, ...
                return str(sys.exc_info()[1]).replace("(u'", "('")

        assert get_error('attributes(href)/html/body/a') == (
            "Expected selector, got '(' at "
            "[Symbol('attributes', 0)] -> Token('(', 10)")
        assert get_error('attributes(href)') == (
            "Expected selector, got '(' at "
            "[Symbol('attributes', 0)] -> Token('(', 10)")
        assert get_error('html/body/a') == (
            "Unexpected symbol: '/' at [Symbol('html', 0)] -> None")
        assert get_error(' ') == (
            "Expected selector, got 'None' at [Token(' ', 0)] -> None")
        assert get_error('div, ') == (
            "Expected selector, got 'None' at "
            "[Symbol('div', 0), Token(',', 3), Token(' ', 4)] -> None")
        assert get_error(' , div') == (
            "Expected selector, got ',' at "
            "[Token(' ', 0)] -> Token(',', 1)")
        assert get_error('p, , div') == (
            "Expected selector, got ',' at "
            "[Symbol('p', 0), Token(',', 1), Token(' ', 2)] -> Token(',', 3)")
        assert get_error('div > ') == (
            "Expected selector, got 'None' at "
            "[Symbol('div', 0), Token(' ', 3), Token('>', 4), Token(' ', 5)]"
            " -> None")
        assert get_error(' > div') == (
            "Expected selector, got '>' at [Token(' ', 0)] -> Token('>', 2)")
        assert get_error('foo|#bar') == (
            "Expected symbol or '*', got '#' at "
            "[Symbol('foo', 0), Token('|', 3), "
            "Token('#', 4)] -> Symbol('bar', 5)")
        assert get_error('#.foo') == (
            "Expected symbol, got '.' at "
            "[Token('#', 0), Token('.', 1)] -> Symbol('foo', 2)")
        assert get_error('.#foo') == (
            "Expected symbol, got '#' at "
            "[Token('.', 0), Token('#', 1)] -> Symbol('foo', 2)")
        assert get_error(':#foo') == (
            "Expected symbol, got '#' at "
            "[Token(':', 0), Token('#', 1)] -> Symbol('foo', 2)")
        assert get_error('[*]') == (
            "Expected '|', got ']' at "
            "[Token('[', 0), Token('*', 1)] -> Token(']', 2)")
        assert get_error('[foo|]') == (
            "Expected symbol, got ']' at "
            "[Token('[', 0), Symbol('foo', 1), Token('|', 4), Token(']', 5)]"
            " -> None")
        assert get_error('[#]') == (
            "Expected symbol or '*', got '#' at "
            "[Token('[', 0), Token('#', 1)] -> Token(']', 2)")
        assert get_error('[foo=#]') == (
            "Expected string or symbol, got '#' at "
            "[Token('[', 0), Symbol('foo', 1), Token('=', 4), Token('#', 5)]"
            " -> Token(']', 6)")
        assert get_error(':nth-child()') == (
            "Expected argument, got ')' at "
            "[Token(':', 0), Symbol('nth-child', 1), Token('(', 10)]"
            " -> Token(')', 11)")
        assert get_error('[href]a') == (
            "Expected selector, got 'a' at "
            "[Token('[', 0), Symbol('href', 1), Token(']', 5)]"
            " -> Symbol('a', 6)")
        assert get_error('[rel=stylesheet]') == None
        assert get_error('[rel:stylesheet]') == (
            "Operator expected, got ':' at [Token('[', 0), Symbol('rel', 1), "
            "Token(':', 4)] -> Symbol('stylesheet', 5)")
        assert get_error('[rel=stylesheet') == (
            "Expected ']', got 'None' at [Token('[', 0), Symbol('rel', 1), "
            "Token('=', 4), Symbol('stylesheet', 5)] -> None")
        assert get_error(':lang(fr)') == None
        assert get_error(':lang(fr') == (
            "Expected ')', got 'None' at [Token(':', 0), Symbol('lang', 1), "
            "Token('(', 5), Symbol('fr', 6)] -> None")
        assert get_error(':contains("foo') == (
            "Expected closing \" for string in: 'foo' at "
            "[Token(':', 0), Symbol('contains', 1), Token('(', 9)] -> None")
        assert get_error('foo!') == (
            "Unexpected symbol: '!' at [Symbol('foo', 0)] -> None")

        # Mis-placed pseudo-elements
        assert get_error('a:before:empty') == (
            "A pseudo-element must be at the end of a selector at "
            "[Symbol('a', 0), Token(':', 1), Symbol('before', 2)] "
            "-> Token(':', 8)")
        assert get_error('li:before a') == (
            "A pseudo-element must be at the end of a selector at "
            "[Symbol('li', 0), Token(':', 2), Symbol('before', 3), "
            "Token(' ', 9)] -> Symbol('a', 10)")
        assert get_error(':not(:before)') == (
            "Pseudo-elements are not allowed inside :not() at "
            "[Token(':', 0), Symbol('not', 1), Token('(', 4), Token(':', 5),"
            " Symbol('before', 6)] -> Token(')', 12)")
        assert get_error(':not(:not(a))') == (
            "Got nested :not() at [Token(':', 0), Symbol('not', 1), "
            "Token('(', 4), Token(':', 5), Symbol('not', 6), Token('(', 9)]"
            " -> Symbol('a', 10)")

    def test_translation(self):
        def xpath(css):
            return str(GenericTranslator().css_to_xpath(css, prefix=''))

        assert xpath('*') == "*"
        assert xpath('e') == "e"
        assert xpath('*|e') == "e"
        assert xpath('e|f') == "e:f"
        assert xpath('e[foo]') == "e[@foo]"
        assert xpath('e[foo|bar]') == "e[@foo:bar]"
        assert xpath('e[foo="bar"]') == "e[@foo = 'bar']"
        assert xpath('e[foo~="bar"]') == (
            "e[@foo and contains("
               "concat(' ', normalize-space(@foo), ' '), ' bar ')]")
        assert xpath('e[foo^="bar"]') == (
            "e[@foo and starts-with(@foo, 'bar')]")
        assert xpath('e[foo$="bar"]') == (
            "e[@foo and substring(@foo, string-length(@foo)-2) = 'bar']")
        assert xpath('e[foo*="bar"]') == (
            "e[@foo and contains(@foo, 'bar')]")
        assert xpath('e[hreflang|="en"]') == (
            "e[@hreflang and ("
               "@hreflang = 'en' or starts-with(@hreflang, 'en-'))]")
        assert xpath('e:nth-child(1)') == (
            "*/*[name() = 'e' and (position() = 1)]")
        assert xpath('e:nth-last-child(1)') == (
            "*/*[name() = 'e' and (position() = last() - 1)]")
        assert xpath('e:nth-last-child(2n+2)') == (
            "*/*[name() = 'e' and ("
               "(position() +2) mod -2 = 0 and position() < (last() -2))]")
        assert xpath('e:nth-of-type(1)') == (
            "*/e[position() = 1]")
        assert xpath('e:nth-last-of-type(1)') == (
            "*/e[position() = last() - 1]")
        assert xpath('e:nth-last-of-type(1)') == (
            "*/e[position() = last() - 1]")
        assert xpath('div e:nth-last-of-type(1) .aclass') == (
            "div/descendant-or-self::*/e[position() = last() - 1]"
               "/descendant-or-self::*/*[@class and contains("
               "concat(' ', normalize-space(@class), ' '), ' aclass ')]")
        assert xpath('e:first-child') == (
            "*/*[name() = 'e' and (position() = 1)]")
        assert xpath('e:last-child') == (
            "*/*[name() = 'e' and (position() = last())]")
        assert xpath('e:first-of-type') == (
            "*/e[position() = 1]")
        assert xpath('e:last-of-type') == (
            "*/e[position() = last()]")
        assert xpath('e:only-child') == (
            "*/*[name() = 'e' and (last() = 1)]")
        assert xpath('e:only-of-type') == (
            "e[last() = 1]")
        assert xpath('e:empty') == (
            "e[not(*) and not(normalize-space())]")
        assert xpath('e:root') == (
            "e[not(parent::*)]")
        assert xpath('e:hover') == (
            "e[0]") # never matches
        assert xpath('e:contains("foo")') == (
            "e[contains(string(.), 'foo')]")
        assert xpath('e:contains(foo)') == (
            "e[contains(string(.), 'foo')]")
        assert xpath('e.warning') == (
            "e[@class and contains("
               "concat(' ', normalize-space(@class), ' '), ' warning ')]")
        assert xpath('e#myid') == (
            "e[@id = 'myid']")
        assert xpath('e:not(:nth-child(odd))') == (
            "e[not((position() -1) mod 2 = 0 and position() >= 1)]")
        assert xpath('e:not(*)') == (
            "e[0]") # never matches
        assert xpath('e f') == (
            "e/descendant-or-self::*/f")
        assert xpath('e > f') == (
            "e/f")
        assert xpath('e + f') == (
            "e/following-sibling::*[name() = 'f' and (position() = 1)]")
        assert xpath('e ~ f') == (
            "e/following-sibling::f")
        assert xpath('div#container p') == (
            "div[@id = 'container']/descendant-or-self::*/p")
        self.assertRaises(ExpressionError, xpath, ':first-of-type')
        self.assertRaises(ExpressionError, xpath, ':only-of-type')
        self.assertRaises(ExpressionError, xpath, ':last-of-type')
        self.assertRaises(ExpressionError, xpath, ':nth-of-type(1)')
        self.assertRaises(ExpressionError, xpath, ':nth-last-of-type(1)')
        self.assertRaises(ExpressionError, xpath, ':nth-child(n-)')
        self.assertRaises(ExpressionError, xpath, ':after')
        self.assertRaises(ExpressionError, xpath, ':lorem-ipsum')
        self.assertRaises(ExpressionError, xpath, ':lorem(ipsum)')
        self.assertRaises(ExpressionError, xpath, '::lorem-ipsum')
        self.assertRaises(TypeError, GenericTranslator().css_to_xpath, 4)
        self.assertRaises(TypeError, GenericTranslator().selector_to_xpath,
            'foo')

    def test_unicode(self):
        if sys.version_info[0] < 3:
            css = '.a\xc1b'.decode('ISO-8859-1')
        else:
            css = '.a\xc1b'

        xpath = GenericTranslator().css_to_xpath(css)
        assert css[1:] in xpath
        xpath = xpath.encode('ascii', 'xmlcharrefreplace').decode('ASCII')
        assert xpath == (
            "descendant-or-self::*[@class and contains("
            "concat(' ', normalize-space(@class), ' '), ' a&#193;b ')]")

    def test_quoting(self):
        css_to_xpath = GenericTranslator().css_to_xpath
        assert css_to_xpath('*[aval="\'"]') == (
            '''descendant-or-self::*[@aval = "'"]''')
        assert css_to_xpath('*[aval="\'\'\'"]') == (
            """descendant-or-self::*[@aval = "'''"]""")
        assert css_to_xpath('*[aval=\'"\']') == (
            '''descendant-or-self::*[@aval = '"']''')
        assert css_to_xpath('*[aval=\'"""\']') == (
            '''descendant-or-self::*[@aval = '"""']''')

    def test_unicode_escapes(self):
        # \22 == '"' \20 == ' '
        css_to_xpath = GenericTranslator().css_to_xpath
        assert css_to_xpath(r'*[aval="\'\22\'"]') == (
            '''descendant-or-self::*[@aval = concat("'",'"',"'")]''')
        assert css_to_xpath(r'*[aval="\'\22 2\'"]') == (
            '''descendant-or-self::*[@aval = concat("'",'"2',"'")]''')
        assert css_to_xpath(r'*[aval="\'\20 \'"]') == (
            '''descendant-or-self::*[@aval = "' '"]''')
        assert css_to_xpath('*[aval="\'\\20\r\n \'"]') == (
            '''descendant-or-self::*[@aval = "' '"]''')

    def test_series(self):
        assert parse_series('1n+3') == (1, 3)
        assert parse_series('n-5') == (1, -5)
        assert parse_series('odd') == (2, 1)
        assert parse_series('even') == (2, 0)
        assert parse_series('3n') == (3, 0)
        assert parse_series('n') == (1, 0)
        assert parse_series('+n') == (1, 0)
        assert parse_series('-n') == (-1, 0)
        assert parse_series('5') == (0, 5)
        self.assertRaises(ValueError, parse_series, 'foo')
        self.assertRaises(ValueError, parse_series, 'n+')

    def test_select(self):
        document = etree.fromstring(HTML_IDS)
        sort_key = dict(
            (el, count) for count, el in enumerate(document.getiterator())
        ).__getitem__
        css_to_xpath = GenericTranslator().css_to_xpath
        html_css_to_xpath = HTMLTranslator().css_to_xpath

        def select_ids(selector, html_only):
            xpath = css_to_xpath(selector)
            items = document.xpath(xpath)
            if html_only:
                assert items == []
                xpath = html_css_to_xpath(selector)
                items = document.xpath(xpath)
            items.sort(key=sort_key)
            return [element.get('id', 'nil') for element in items]

        def pcss(main, *selectors, **kwargs):
            html_only = kwargs.pop('html_only', False)
            result = select_ids(main, html_only)
            for selector in selectors:
                assert select_ids(selector, html_only) == result
            return result

        all_ids = pcss('*')
        assert all_ids[:6] == [
            'html', 'nil', 'link-href', 'link-nohref', 'nil', 'outer-div']
        assert all_ids[-1:] == ['foobar-span']
        assert pcss('div') == ['outer-div', 'li-div', 'foobar-div']
        assert pcss('DIV', html_only=True) == [
            'outer-div', 'li-div', 'foobar-div'] # case-insensitive in HTML
        assert pcss('div div') == ['li-div']
        assert pcss('div, div div') == ['outer-div', 'li-div', 'foobar-div']
        assert pcss('a[name]') == ['name-anchor']
        assert pcss('a[NAme]', html_only=True) == [
            'name-anchor'] # case-insensitive in HTML:
        assert pcss('a[rel]') == ['tag-anchor', 'nofollow-anchor']
        assert pcss('a[rel="tag"]') == ['tag-anchor']
        assert pcss('a[href*="localhost"]') == ['tag-anchor']
        assert pcss('a[href^="http"]') == ['tag-anchor', 'nofollow-anchor']
        assert pcss('a[href^="http:"]') == ['tag-anchor']
        assert pcss('a[href$="org"]') == ['nofollow-anchor']
        assert pcss('div[foobar~="bc"]', 'div[foobar~="cde"]') == [
            'foobar-div']
        assert pcss('div[foobar~="cd"]') == []
        assert pcss('*[lang|="En"]', '[lang|="En-us"]') == ['second-li']
        # Attribute values are case sensitive
        assert pcss('*[lang|="en"]', '[lang|="en-US"]') == []
        assert pcss('*[lang|="e"]') == []
        # ... :lang() is not.
        assert pcss(':lang("EN")', '*:lang(en-US)', html_only=True) == [
            'second-li', 'li-div']
        assert pcss(':lang("e")', html_only=True) == []
        assert pcss('li:nth-child(3)') == ['third-li']
        assert pcss('li:nth-child(10)') == []
        assert pcss('li:nth-child(2n)', 'li:nth-child(even)',
                    'li:nth-child(2n+0)') == [
            'second-li', 'fourth-li', 'sixth-li']
        assert pcss('li:nth-child(+2n+1)', 'li:nth-child(odd)') == [
            'first-li', 'third-li', 'fifth-li', 'seventh-li']
        assert pcss('li:nth-child(2n+4)') == ['fourth-li', 'sixth-li']
        # FIXME: I'm not 100% sure this is right:
        assert pcss('li:nth-child(3n+1)') == [
            'first-li', 'fourth-li', 'seventh-li']
        assert pcss('li:nth-last-child(0)') == [
            'seventh-li']
        assert pcss('li:nth-last-child(2n)', 'li:nth-last-child(even)') == [
            'second-li', 'fourth-li', 'sixth-li']
        assert pcss('li:nth-last-child(2n+2)') == ['second-li', 'fourth-li']
        assert pcss('ol:first-of-type') == ['first-ol']
        assert pcss('ol:nth-child(1)') == []
        assert pcss('ol:nth-of-type(2)') == ['second-ol']
        # FIXME: like above', '(1) or (2)?
        assert pcss('ol:nth-last-of-type(1)') == ['first-ol']
        assert pcss('span:only-child') == ['foobar-span']
        assert pcss('li div:only-child') == ['li-div']
        assert pcss('div *:only-child') == ['li-div', 'foobar-span']
        self.assertRaises(ExpressionError, pcss, 'p *:only-of-type')
        assert pcss('p:only-of-type') == ['paragraph']
        assert pcss('a:empty', 'a:EMpty') == ['name-anchor']
        assert pcss('li:empty') == [
            'third-li', 'fourth-li', 'fifth-li', 'sixth-li', 'seventh-li']
        assert pcss(':root', 'html:root') == ['html']
        assert pcss('li:root', '* :root') == []
        assert pcss('*:contains("link")', ':CONtains("link")') == [
            'html', 'nil', 'outer-div', 'tag-anchor', 'nofollow-anchor']
        assert pcss('*:contains("LInk")') == [] # case sensitive
        assert pcss('*:contains("e")') == [
            'html', 'nil', 'outer-div', 'first-ol', 'first-li',
            'paragraph', 'p-em']
        assert pcss('*:contains("E")') == [] # case-sensitive
        assert pcss('.a', '.b', '*.a', 'ol.a') == ['first-ol']
        assert pcss('.c', '*.c') == ['first-ol', 'third-li', 'fourth-li']
        assert pcss('ol *.c', 'ol li.c', 'li ~ li.c', 'ol > li.c') == [
            'third-li', 'fourth-li']
        assert pcss('#first-li', 'li#first-li', '*#first-li') == ['first-li']
        assert pcss('li div', 'li > div', 'div div') == ['li-div']
        assert pcss('div > div') == []
        assert pcss('div>.c', 'div > .c') == ['first-ol']
        assert pcss('div + div') == ['foobar-div']
        assert pcss('a ~ a') == ['tag-anchor', 'nofollow-anchor']
        assert pcss('a[rel="tag"] ~ a') == ['nofollow-anchor']
        assert pcss('ol#first-ol li:last-child') == ['seventh-li']
        assert pcss('ol#first-ol *:last-child') == ['li-div', 'seventh-li']
        assert pcss('#outer-div:first-child') == ['outer-div']
        assert pcss('#outer-div :first-child') == [
            'name-anchor', 'first-li', 'li-div', 'p-b',
            'checkbox-fieldset-disabled', 'area-href']
        assert pcss('a[href]') == ['tag-anchor', 'nofollow-anchor']
        assert pcss(':not(*)') == []
        assert pcss('a:not([href])') == ['name-anchor']
        assert pcss('ol :Not(li[class])') == [
            'first-li', 'second-li', 'li-div',
            'fifth-li', 'sixth-li', 'seventh-li']

        # HTML-specific
        assert pcss(':link', html_only=True) == [
            'link-href', 'tag-anchor', 'nofollow-anchor', 'area-href']
        assert pcss(':visited', html_only=True) == []
        assert pcss(':enabled', html_only=True) == [
            'link-href', 'tag-anchor', 'nofollow-anchor',
            'checkbox-unchecked', 'text-checked', 'checkbox-checked',
            'area-href']
        assert pcss(':disabled', html_only=True) == [
            'checkbox-disabled', 'checkbox-disabled-checked', 'fieldset',
            'checkbox-fieldset-disabled']
        assert pcss(':checked', html_only=True) == [
            'checkbox-checked', 'checkbox-disabled-checked']

    def test_select_shakespeare(self):
        document = html.document_fromstring(HTML_SHAKESPEARE)
        body = document.xpath('//body')[0]
        css_to_xpath = GenericTranslator().css_to_xpath

        try:
            basestring_ = basestring
        except NameError:
            basestring_ = (str, bytes)

        def count(selector):
            xpath = css_to_xpath(selector)
            results = body.xpath(xpath)
            assert not isinstance(results, basestring_)
            found = set()
            for item in results:
                assert item not in found
                found.add(item)
                assert not isinstance(item, basestring_)
            return len(results)

        # Data borrowed from http://mootools.net/slickspeed/

        ## Changed from original; probably because I'm only
        ## searching the body.
        #assert count('*') == 252
        assert count('*') == 246
        assert count('div:contains(CELIA)') == 26
        assert count('div:only-child') == 22 # ?
        assert count('div:nth-child(even)') == 106
        assert count('div:nth-child(2n)') == 106
        assert count('div:nth-child(odd)') == 137
        assert count('div:nth-child(2n+1)') == 137
        assert count('div:nth-child(n)') == 243
        assert count('div:last-child') == 53
        assert count('div:first-child') == 51
        assert count('div > div') == 242
        assert count('div + div') == 190
        assert count('div ~ div') == 190
        assert count('body') == 1
        assert count('body div') == 243
        assert count('div') == 243
        assert count('div div') == 242
        assert count('div div div') == 241
        assert count('div, div, div') == 243
        assert count('div, a, span') == 243
        assert count('.dialog') == 51
        assert count('div.dialog') == 51
        assert count('div .dialog') == 51
        assert count('div.character, div.dialog') == 99
        assert count('div.direction.dialog') == 0
        assert count('div.dialog.direction') == 0
        assert count('div.dialog.scene') == 1
        assert count('div.scene.scene') == 1
        assert count('div.scene .scene') == 0
        assert count('div.direction .dialog ') == 0
        assert count('div .dialog .direction') == 4
        assert count('div.dialog .dialog .direction') == 4
        assert count('#speech5') == 1
        assert count('div#speech5') == 1
        assert count('div #speech5') == 1
        assert count('div.scene div.dialog') == 49
        assert count('div#scene1 div.dialog div') == 142
        assert count('#scene1 #speech1') == 1
        assert count('div[class]') == 103
        assert count('div[class=dialog]') == 50
        assert count('div[class^=dia]') == 51
        assert count('div[class$=log]') == 50
        assert count('div[class*=sce]') == 1
        assert count('div[class|=dialog]') == 50 # ? Seems right
        assert count('div[class!=madeup]') == 243 # ? Seems right
        assert count('div[class~=dialog]') == 51 # ? Seems right

HTML_IDS = '''
<html id="html"><head>
<link id="link-href" href="foo" />
<link id="link-nohref" />
</head><body>
<div id="outer-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>
<ol id="first-ol" class="a b c">
<li id="first-li">content</li>
<li id="second-li" lang="En-us">
<div id="li-div">
</div>
</li>
<li id="third-li" class="ab c"></li>
<li id="fourth-li" class="ab
c"></li>
<li id="fifth-li"></li>
<li id="sixth-li"></li>
<li id="seventh-li"> </li>
</ol>
<p id="paragraph">
<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>
<ol id="second-ol">
</ol>
<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 id="foobar-div" foobar="ab bc
cde"><span id="foobar-span"></span></div>
</body></html>
'''


HTML_SHAKESPEARE = '''
<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Strict//EN"
"http://www.w3.org/TR/xhtml1/DTD/xhtml1-strict.dtd">
<html xmlns="http://www.w3.org/1999/xhtml" xml:lang="en" lang="en" debug="true">
<head>
<meta http-equiv="Content-Type" content="text/html; charset=utf-8"/>
</head>
<body>
<div id="test">
<div class="dialog">
<h2>As You Like It</h2>
<div id="playwright">
by William Shakespeare
</div>
<div class="dialog scene thirdClass" id="scene1">
<h3>ACT I, SCENE III. A room in the palace.</h3>
<div class="dialog">
<div class="direction">Enter CELIA and ROSALIND</div>
</div>
<div id="speech1" class="character">CELIA</div>
<div class="dialog">
<div id="scene1.3.1">Why, cousin! why, Rosalind! Cupid have mercy! not a word?</div>
</div>
<div id="speech2" class="character">ROSALIND</div>
<div class="dialog">
<div id="scene1.3.2">Not one to throw at a dog.</div>
</div>
<div id="speech3" class="character">CELIA</div>
<div class="dialog">
<div id="scene1.3.3">No, thy words are too precious to be cast away upon</div>
<div id="scene1.3.4">curs; throw some of them at me; come, lame me with reasons.</div>
</div>
<div id="speech4" class="character">ROSALIND</div>
<div id="speech5" class="character">CELIA</div>
<div class="dialog">
<div id="scene1.3.8">But is all this for your father?</div>
</div>
<div class="dialog">
<div id="scene1.3.5">Then there were two cousins laid up; when the one</div>
<div id="scene1.3.6">should be lamed with reasons and the other mad</div>
<div id="scene1.3.7">without any.</div>
</div>
<div id="speech6" class="character">ROSALIND</div>
<div class="dialog">
<div id="scene1.3.9">No, some of it is for my child's father. O, how</div>
<div id="scene1.3.10">full of briers is this working-day world!</div>
</div>
<div id="speech7" class="character">CELIA</div>
<div class="dialog">
<div id="scene1.3.11">They are but burs, cousin, thrown upon thee in</div>
<div id="scene1.3.12">holiday foolery: if we walk not in the trodden</div>
<div id="scene1.3.13">paths our very petticoats will catch them.</div>
</div>
<div id="speech8" class="character">ROSALIND</div>
<div class="dialog">
<div id="scene1.3.14">I could shake them off my coat: these burs are in my heart.</div>
</div>
<div id="speech9" class="character">CELIA</div>
<div class="dialog">
<div id="scene1.3.15">Hem them away.</div>
</div>
<div id="speech10" class="character">ROSALIND</div>
<div class="dialog">
<div id="scene1.3.16">I would try, if I could cry 'hem' and have him.</div>
</div>
<div id="speech11" class="character">CELIA</div>
<div class="dialog">
<div id="scene1.3.17">Come, come, wrestle with thy affections.</div>
</div>
<div id="speech12" class="character">ROSALIND</div>
<div class="dialog">
<div id="scene1.3.18">O, they take the part of a better wrestler than myself!</div>
</div>
<div id="speech13" class="character">CELIA</div>
<div class="dialog">
<div id="scene1.3.19">O, a good wish upon you! you will try in time, in</div>
<div id="scene1.3.20">despite of a fall. But, turning these jests out of</div>
<div id="scene1.3.21">service, let us talk in good earnest: is it</div>
<div id="scene1.3.22">possible, on such a sudden, you should fall into so</div>
<div id="scene1.3.23">strong a liking with old Sir Rowland's youngest son?</div>
</div>
<div id="speech14" class="character">ROSALIND</div>
<div class="dialog">
<div id="scene1.3.24">The duke my father loved his father dearly.</div>
</div>
<div id="speech15" class="character">CELIA</div>
<div class="dialog">
<div id="scene1.3.25">Doth it therefore ensue that you should love his son</div>
<div id="scene1.3.26">dearly? By this kind of chase, I should hate him,</div>
<div id="scene1.3.27">for my father hated his father dearly; yet I hate</div>
<div id="scene1.3.28">not Orlando.</div>
</div>
<div id="speech16" class="character">ROSALIND</div>
<div title="wtf" class="dialog">
<div id="scene1.3.29">No, faith, hate him not, for my sake.</div>
</div>
<div id="speech17" class="character">CELIA</div>
<div class="dialog">
<div id="scene1.3.30">Why should I not? doth he not deserve well?</div>
</div>
<div id="speech18" class="character">ROSALIND</div>
<div class="dialog">
<div id="scene1.3.31">Let me love him for that, and do you love him</div>
<div id="scene1.3.32">because I do. Look, here comes the duke.</div>
</div>
<div id="speech19" class="character">CELIA</div>
<div class="dialog">
<div id="scene1.3.33">With his eyes full of anger.</div>
<div class="direction">Enter DUKE FREDERICK, with Lords</div>
</div>
<div id="speech20" class="character">DUKE FREDERICK</div>
<div class="dialog">
<div id="scene1.3.34">Mistress, dispatch you with your safest haste</div>
<div id="scene1.3.35">And get you from our court.</div>
</div>
<div id="speech21" class="character">ROSALIND</div>
<div class="dialog">
<div id="scene1.3.36">Me, uncle?</div>
</div>
<div id="speech22" class="character">DUKE FREDERICK</div>
<div class="dialog">
<div id="scene1.3.37">You, cousin</div>
<div id="scene1.3.38">Within these ten days if that thou be'st found</div>
<div id="scene1.3.39">So near our public court as twenty miles,</div>
<div id="scene1.3.40">Thou diest for it.</div>
</div>
<div id="speech23" class="character">ROSALIND</div>
<div class="dialog">
<div id="scene1.3.41"> I do beseech your grace,</div>
<div id="scene1.3.42">Let me the knowledge of my fault bear with me:</div>
<div id="scene1.3.43">If with myself I hold intelligence</div>
<div id="scene1.3.44">Or have acquaintance with mine own desires,</div>
<div id="scene1.3.45">If that I do not dream or be not frantic,--</div>
<div id="scene1.3.46">As I do trust I am not--then, dear uncle,</div>
<div id="scene1.3.47">Never so much as in a thought unborn</div>
<div id="scene1.3.48">Did I offend your highness.</div>
</div>
<div id="speech24" class="character">DUKE FREDERICK</div>
<div class="dialog">
<div id="scene1.3.49">Thus do all traitors:</div>
<div id="scene1.3.50">If their purgation did consist in words,</div>
<div id="scene1.3.51">They are as innocent as grace itself:</div>
<div id="scene1.3.52">Let it suffice thee that I trust thee not.</div>
</div>
<div id="speech25" class="character">ROSALIND</div>
<div class="dialog">
<div id="scene1.3.53">Yet your mistrust cannot make me a traitor:</div>
<div id="scene1.3.54">Tell me whereon the likelihood depends.</div>
</div>
<div id="speech26" class="character">DUKE FREDERICK</div>
<div class="dialog">
<div id="scene1.3.55">Thou art thy father's daughter; there's enough.</div>
</div>
<div id="speech27" class="character">ROSALIND</div>
<div class="dialog">
<div id="scene1.3.56">So was I when your highness took his dukedom;</div>
<div id="scene1.3.57">So was I when your highness banish'd him:</div>
<div id="scene1.3.58">Treason is not inherited, my lord;</div>
<div id="scene1.3.59">Or, if we did derive it from our friends,</div>
<div id="scene1.3.60">What's that to me? my father was no traitor:</div>
<div id="scene1.3.61">Then, good my liege, mistake me not so much</div>
<div id="scene1.3.62">To think my poverty is treacherous.</div>
</div>
<div id="speech28" class="character">CELIA</div>
<div class="dialog">
<div id="scene1.3.63">Dear sovereign, hear me speak.</div>
</div>
<div id="speech29" class="character">DUKE FREDERICK</div>
<div class="dialog">
<div id="scene1.3.64">Ay, Celia; we stay'd her for your sake,</div>
<div id="scene1.3.65">Else had she with her father ranged along.</div>
</div>
<div id="speech30" class="character">CELIA</div>
<div class="dialog">
<div id="scene1.3.66">I did not then entreat to have her stay;</div>
<div id="scene1.3.67">It was your pleasure and your own remorse:</div>
<div id="scene1.3.68">I was too young that time to value her;</div>
<div id="scene1.3.69">But now I know her: if she be a traitor,</div>
<div id="scene1.3.70">Why so am I; we still have slept together,</div>
<div id="scene1.3.71">Rose at an instant, learn'd, play'd, eat together,</div>
<div id="scene1.3.72">And wheresoever we went, like Juno's swans,</div>
<div id="scene1.3.73">Still we went coupled and inseparable.</div>
</div>
<div id="speech31" class="character">DUKE FREDERICK</div>
<div class="dialog">
<div id="scene1.3.74">She is too subtle for thee; and her smoothness,</div>
<div id="scene1.3.75">Her very silence and her patience</div>
<div id="scene1.3.76">Speak to the people, and they pity her.</div>
<div id="scene1.3.77">Thou art a fool: she robs thee of thy name;</div>
<div id="scene1.3.78">And thou wilt show more bright and seem more virtuous</div>
<div id="scene1.3.79">When she is gone. Then open not thy lips:</div>
<div id="scene1.3.80">Firm and irrevocable is my doom</div>
<div id="scene1.3.81">Which I have pass'd upon her; she is banish'd.</div>
</div>
<div id="speech32" class="character">CELIA</div>
<div class="dialog">
<div id="scene1.3.82">Pronounce that sentence then on me, my liege:</div>
<div id="scene1.3.83">I cannot live out of her company.</div>
</div>
<div id="speech33" class="character">DUKE FREDERICK</div>
<div class="dialog">
<div id="scene1.3.84">You are a fool. You, niece, provide yourself:</div>
<div id="scene1.3.85">If you outstay the time, upon mine honour,</div>
<div id="scene1.3.86">And in the greatness of my word, you die.</div>
<div class="direction">Exeunt DUKE FREDERICK and Lords</div>
</div>
<div id="speech34" class="character">CELIA</div>
<div class="dialog">
<div id="scene1.3.87">O my poor Rosalind, whither wilt thou go?</div>
<div id="scene1.3.88">Wilt thou change fathers? I will give thee mine.</div>
<div id="scene1.3.89">I charge thee, be not thou more grieved than I am.</div>
</div>
<div id="speech35" class="character">ROSALIND</div>
<div class="dialog">
<div id="scene1.3.90">I have more cause.</div>
</div>
<div id="speech36" class="character">CELIA</div>
<div class="dialog">
<div id="scene1.3.91"> Thou hast not, cousin;</div>
<div id="scene1.3.92">Prithee be cheerful: know'st thou not, the duke</div>
<div id="scene1.3.93">Hath banish'd me, his daughter?</div>
</div>
<div id="speech37" class="character">ROSALIND</div>
<div class="dialog">
<div id="scene1.3.94">That he hath not.</div>
</div>
<div id="speech38" class="character">CELIA</div>
<div class="dialog">
<div id="scene1.3.95">No, hath not? Rosalind lacks then the love</div>
<div id="scene1.3.96">Which teacheth thee that thou and I am one:</div>
<div id="scene1.3.97">Shall we be sunder'd? shall we part, sweet girl?</div>
<div id="scene1.3.98">No: let my father seek another heir.</div>
<div id="scene1.3.99">Therefore devise with me how we may fly,</div>
<div id="scene1.3.100">Whither to go and what to bear with us;</div>
<div id="scene1.3.101">And do not seek to take your change upon you,</div>
<div id="scene1.3.102">To bear your griefs yourself and leave me out;</div>
<div id="scene1.3.103">For, by this heaven, now at our sorrows pale,</div>
<div id="scene1.3.104">Say what thou canst, I'll go along with thee.</div>
</div>
<div id="speech39" class="character">ROSALIND</div>
<div class="dialog">
<div id="scene1.3.105">Why, whither shall we go?</div>
</div>
<div id="speech40" class="character">CELIA</div>
<div class="dialog">
<div id="scene1.3.106">To seek my uncle in the forest of Arden.</div>
</div>
<div id="speech41" class="character">ROSALIND</div>
<div class="dialog">
<div id="scene1.3.107">Alas, what danger will it be to us,</div>
<div id="scene1.3.108">Maids as we are, to travel forth so far!</div>
<div id="scene1.3.109">Beauty provoketh thieves sooner than gold.</div>
</div>
<div id="speech42" class="character">CELIA</div>
<div class="dialog">
<div id="scene1.3.110">I'll put myself in poor and mean attire</div>
<div id="scene1.3.111">And with a kind of umber smirch my face;</div>
<div id="scene1.3.112">The like do you: so shall we pass along</div>
<div id="scene1.3.113">And never stir assailants.</div>
</div>
<div id="speech43" class="character">ROSALIND</div>
<div class="dialog">
<div id="scene1.3.114">Were it not better,</div>
<div id="scene1.3.115">Because that I am more than common tall,</div>
<div id="scene1.3.116">That I did suit me all points like a man?</div>
<div id="scene1.3.117">A gallant curtle-axe upon my thigh,</div>
<div id="scene1.3.118">A boar-spear in my hand; and--in my heart</div>
<div id="scene1.3.119">Lie there what hidden woman's fear there will--</div>
<div id="scene1.3.120">We'll have a swashing and a martial outside,</div>
<div id="scene1.3.121">As many other mannish cowards have</div>
<div id="scene1.3.122">That do outface it with their semblances.</div>
</div>
<div id="speech44" class="character">CELIA</div>
<div class="dialog">
<div id="scene1.3.123">What shall I call thee when thou art a man?</div>
</div>
<div id="speech45" class="character">ROSALIND</div>
<div class="dialog">
<div id="scene1.3.124">I'll have no worse a name than Jove's own page;</div>
<div id="scene1.3.125">And therefore look you call me Ganymede.</div>
<div id="scene1.3.126">But what will you be call'd?</div>
</div>
<div id="speech46" class="character">CELIA</div>
<div class="dialog">
<div id="scene1.3.127">Something that hath a reference to my state</div>
<div id="scene1.3.128">No longer Celia, but Aliena.</div>
</div>
<div id="speech47" class="character">ROSALIND</div>
<div class="dialog">
<div id="scene1.3.129">But, cousin, what if we assay'd to steal</div>
<div id="scene1.3.130">The clownish fool out of your father's court?</div>
<div id="scene1.3.131">Would he not be a comfort to our travel?</div>
</div>
<div id="speech48" class="character">CELIA</div>
<div class="dialog">
<div id="scene1.3.132">He'll go along o'er the wide world with me;</div>
<div id="scene1.3.133">Leave me alone to woo him. Let's away,</div>
<div id="scene1.3.134">And get our jewels and our wealth together,</div>
<div id="scene1.3.135">Devise the fittest time and safest way</div>
<div id="scene1.3.136">To hide us from pursuit that will be made</div>
<div id="scene1.3.137">After my flight. Now go we in content</div>
<div id="scene1.3.138">To liberty and not to banishment.</div>
<div class="direction">Exeunt</div>
</div>
</div>
</div>
</div>
</body>
</html>
'''


if __name__ == '__main__':
    unittest.main()
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