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488 lines
17 KiB
488 lines
17 KiB
10 months ago
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import pytest
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import types
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from unittest.mock import MagicMock
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from bs4 import (
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CSS,
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BeautifulSoup,
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ResultSet,
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)
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from . import (
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SoupTest,
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SOUP_SIEVE_PRESENT,
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)
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if SOUP_SIEVE_PRESENT:
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from soupsieve import SelectorSyntaxError
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@pytest.mark.skipif(not SOUP_SIEVE_PRESENT, reason="Soup Sieve not installed")
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class TestCSSSelectors(SoupTest):
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"""Test basic CSS selector functionality.
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This functionality is implemented in soupsieve, which has a much
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more comprehensive test suite, so this is basically an extra check
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that soupsieve works as expected.
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"""
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HTML = """
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<!DOCTYPE HTML PUBLIC "-//W3C//DTD HTML 4.01//EN"
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"http://www.w3.org/TR/html4/strict.dtd">
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<html>
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<head>
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<title>The title</title>
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<link rel="stylesheet" href="blah.css" type="text/css" id="l1">
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</head>
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<body>
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<custom-dashed-tag class="dashed" id="dash1">Hello there.</custom-dashed-tag>
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<div id="main" class="fancy">
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<div id="inner">
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<h1 id="header1">An H1</h1>
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<p>Some text</p>
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<p class="onep" id="p1">Some more text</p>
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<h2 id="header2">An H2</h2>
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<p class="class1 class2 class3" id="pmulti">Another</p>
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<a href="http://bob.example.org/" rel="friend met" id="bob">Bob</a>
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<h2 id="header3">Another H2</h2>
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<a id="me" href="http://simonwillison.net/" rel="me">me</a>
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<span class="s1">
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<a href="#" id="s1a1">span1a1</a>
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<a href="#" id="s1a2">span1a2 <span id="s1a2s1">test</span></a>
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<span class="span2">
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<a href="#" id="s2a1">span2a1</a>
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</span>
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<span class="span3"></span>
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<custom-dashed-tag class="dashed" id="dash2"/>
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<div data-tag="dashedvalue" id="data1"/>
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</span>
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</div>
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<x id="xid">
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<z id="zida"/>
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<z id="zidab"/>
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<z id="zidac"/>
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</x>
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<y id="yid">
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<z id="zidb"/>
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</y>
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<p lang="en" id="lang-en">English</p>
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<p lang="en-gb" id="lang-en-gb">English UK</p>
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<p lang="en-us" id="lang-en-us">English US</p>
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<p lang="fr" id="lang-fr">French</p>
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</div>
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<div id="footer">
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</div>
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"""
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def setup_method(self):
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self.soup = BeautifulSoup(self.HTML, 'html.parser')
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def assert_selects(self, selector, expected_ids, **kwargs):
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results = self.soup.select(selector, **kwargs)
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assert isinstance(results, ResultSet)
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el_ids = [el['id'] for el in results]
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el_ids.sort()
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expected_ids.sort()
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assert expected_ids == el_ids, "Selector %s, expected [%s], got [%s]" % (
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selector, ', '.join(expected_ids), ', '.join(el_ids)
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)
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assertSelect = assert_selects
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def assert_select_multiple(self, *tests):
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for selector, expected_ids in tests:
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self.assert_selects(selector, expected_ids)
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def test_precompiled(self):
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sel = self.soup.css.compile('div')
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els = self.soup.select(sel)
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assert len(els) == 4
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for div in els:
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assert div.name == 'div'
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el = self.soup.select_one(sel)
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assert 'main' == el['id']
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def test_one_tag_one(self):
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els = self.soup.select('title')
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assert len(els) == 1
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assert els[0].name == 'title'
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assert els[0].contents == ['The title']
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def test_one_tag_many(self):
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els = self.soup.select('div')
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assert len(els) == 4
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for div in els:
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assert div.name == 'div'
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el = self.soup.select_one('div')
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assert 'main' == el['id']
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def test_select_one_returns_none_if_no_match(self):
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match = self.soup.select_one('nonexistenttag')
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assert None == match
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def test_tag_in_tag_one(self):
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els = self.soup.select('div div')
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self.assert_selects('div div', ['inner', 'data1'])
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def test_tag_in_tag_many(self):
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for selector in ('html div', 'html body div', 'body div'):
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self.assert_selects(selector, ['data1', 'main', 'inner', 'footer'])
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def test_limit(self):
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self.assert_selects('html div', ['main'], limit=1)
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self.assert_selects('html body div', ['inner', 'main'], limit=2)
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self.assert_selects('body div', ['data1', 'main', 'inner', 'footer'],
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limit=10)
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def test_tag_no_match(self):
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assert len(self.soup.select('del')) == 0
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def test_invalid_tag(self):
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with pytest.raises(SelectorSyntaxError):
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self.soup.select('tag%t')
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def test_select_dashed_tag_ids(self):
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self.assert_selects('custom-dashed-tag', ['dash1', 'dash2'])
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def test_select_dashed_by_id(self):
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dashed = self.soup.select('custom-dashed-tag[id=\"dash2\"]')
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assert dashed[0].name == 'custom-dashed-tag'
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assert dashed[0]['id'] == 'dash2'
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def test_dashed_tag_text(self):
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assert self.soup.select('body > custom-dashed-tag')[0].text == 'Hello there.'
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def test_select_dashed_matches_find_all(self):
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assert self.soup.select('custom-dashed-tag') == self.soup.find_all('custom-dashed-tag')
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def test_header_tags(self):
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self.assert_select_multiple(
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('h1', ['header1']),
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('h2', ['header2', 'header3']),
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)
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def test_class_one(self):
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for selector in ('.onep', 'p.onep', 'html p.onep'):
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els = self.soup.select(selector)
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assert len(els) == 1
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assert els[0].name == 'p'
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assert els[0]['class'] == ['onep']
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def test_class_mismatched_tag(self):
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els = self.soup.select('div.onep')
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assert len(els) == 0
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def test_one_id(self):
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for selector in ('div#inner', '#inner', 'div div#inner'):
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self.assert_selects(selector, ['inner'])
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def test_bad_id(self):
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els = self.soup.select('#doesnotexist')
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assert len(els) == 0
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def test_items_in_id(self):
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els = self.soup.select('div#inner p')
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assert len(els) == 3
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for el in els:
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assert el.name == 'p'
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assert els[1]['class'] == ['onep']
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assert not els[0].has_attr('class')
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def test_a_bunch_of_emptys(self):
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for selector in ('div#main del', 'div#main div.oops', 'div div#main'):
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assert len(self.soup.select(selector)) == 0
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def test_multi_class_support(self):
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for selector in ('.class1', 'p.class1', '.class2', 'p.class2',
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'.class3', 'p.class3', 'html p.class2', 'div#inner .class2'):
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self.assert_selects(selector, ['pmulti'])
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def test_multi_class_selection(self):
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for selector in ('.class1.class3', '.class3.class2',
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'.class1.class2.class3'):
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self.assert_selects(selector, ['pmulti'])
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def test_child_selector(self):
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self.assert_selects('.s1 > a', ['s1a1', 's1a2'])
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self.assert_selects('.s1 > a span', ['s1a2s1'])
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def test_child_selector_id(self):
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self.assert_selects('.s1 > a#s1a2 span', ['s1a2s1'])
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def test_attribute_equals(self):
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self.assert_select_multiple(
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('p[class="onep"]', ['p1']),
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('p[id="p1"]', ['p1']),
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('[class="onep"]', ['p1']),
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('[id="p1"]', ['p1']),
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('link[rel="stylesheet"]', ['l1']),
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('link[type="text/css"]', ['l1']),
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('link[href="blah.css"]', ['l1']),
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('link[href="no-blah.css"]', []),
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('[rel="stylesheet"]', ['l1']),
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('[type="text/css"]', ['l1']),
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('[href="blah.css"]', ['l1']),
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('[href="no-blah.css"]', []),
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('p[href="no-blah.css"]', []),
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('[href="no-blah.css"]', []),
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)
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def test_attribute_tilde(self):
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self.assert_select_multiple(
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('p[class~="class1"]', ['pmulti']),
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('p[class~="class2"]', ['pmulti']),
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('p[class~="class3"]', ['pmulti']),
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('[class~="class1"]', ['pmulti']),
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('[class~="class2"]', ['pmulti']),
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('[class~="class3"]', ['pmulti']),
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('a[rel~="friend"]', ['bob']),
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('a[rel~="met"]', ['bob']),
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('[rel~="friend"]', ['bob']),
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('[rel~="met"]', ['bob']),
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)
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def test_attribute_startswith(self):
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self.assert_select_multiple(
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('[rel^="style"]', ['l1']),
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('link[rel^="style"]', ['l1']),
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('notlink[rel^="notstyle"]', []),
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('[rel^="notstyle"]', []),
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('link[rel^="notstyle"]', []),
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('link[href^="bla"]', ['l1']),
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('a[href^="http://"]', ['bob', 'me']),
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('[href^="http://"]', ['bob', 'me']),
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('[id^="p"]', ['pmulti', 'p1']),
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('[id^="m"]', ['me', 'main']),
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('div[id^="m"]', ['main']),
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('a[id^="m"]', ['me']),
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('div[data-tag^="dashed"]', ['data1'])
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)
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def test_attribute_endswith(self):
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self.assert_select_multiple(
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('[href$=".css"]', ['l1']),
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('link[href$=".css"]', ['l1']),
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('link[id$="1"]', ['l1']),
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('[id$="1"]', ['data1', 'l1', 'p1', 'header1', 's1a1', 's2a1', 's1a2s1', 'dash1']),
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('div[id$="1"]', ['data1']),
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('[id$="noending"]', []),
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)
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def test_attribute_contains(self):
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self.assert_select_multiple(
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# From test_attribute_startswith
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('[rel*="style"]', ['l1']),
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('link[rel*="style"]', ['l1']),
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('notlink[rel*="notstyle"]', []),
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('[rel*="notstyle"]', []),
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('link[rel*="notstyle"]', []),
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('link[href*="bla"]', ['l1']),
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('[href*="http://"]', ['bob', 'me']),
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('[id*="p"]', ['pmulti', 'p1']),
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('div[id*="m"]', ['main']),
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('a[id*="m"]', ['me']),
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# From test_attribute_endswith
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('[href*=".css"]', ['l1']),
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('link[href*=".css"]', ['l1']),
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('link[id*="1"]', ['l1']),
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('[id*="1"]', ['data1', 'l1', 'p1', 'header1', 's1a1', 's1a2', 's2a1', 's1a2s1', 'dash1']),
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('div[id*="1"]', ['data1']),
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('[id*="noending"]', []),
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# New for this test
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('[href*="."]', ['bob', 'me', 'l1']),
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('a[href*="."]', ['bob', 'me']),
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('link[href*="."]', ['l1']),
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('div[id*="n"]', ['main', 'inner']),
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('div[id*="nn"]', ['inner']),
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('div[data-tag*="edval"]', ['data1'])
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)
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def test_attribute_exact_or_hypen(self):
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self.assert_select_multiple(
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('p[lang|="en"]', ['lang-en', 'lang-en-gb', 'lang-en-us']),
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('[lang|="en"]', ['lang-en', 'lang-en-gb', 'lang-en-us']),
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('p[lang|="fr"]', ['lang-fr']),
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('p[lang|="gb"]', []),
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)
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def test_attribute_exists(self):
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self.assert_select_multiple(
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('[rel]', ['l1', 'bob', 'me']),
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('link[rel]', ['l1']),
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('a[rel]', ['bob', 'me']),
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('[lang]', ['lang-en', 'lang-en-gb', 'lang-en-us', 'lang-fr']),
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('p[class]', ['p1', 'pmulti']),
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('[blah]', []),
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('p[blah]', []),
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('div[data-tag]', ['data1'])
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)
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def test_quoted_space_in_selector_name(self):
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html = """<div style="display: wrong">nope</div>
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<div style="display: right">yes</div>
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"""
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soup = BeautifulSoup(html, 'html.parser')
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[chosen] = soup.select('div[style="display: right"]')
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assert "yes" == chosen.string
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def test_unsupported_pseudoclass(self):
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with pytest.raises(NotImplementedError):
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self.soup.select("a:no-such-pseudoclass")
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|
||
|
|
with pytest.raises(SelectorSyntaxError):
|
||
|
|
self.soup.select("a:nth-of-type(a)")
|
||
|
|
|
||
|
|
def test_nth_of_type(self):
|
||
|
|
# Try to select first paragraph
|
||
|
|
els = self.soup.select('div#inner p:nth-of-type(1)')
|
||
|
|
assert len(els) == 1
|
||
|
|
assert els[0].string == 'Some text'
|
||
|
|
|
||
|
|
# Try to select third paragraph
|
||
|
|
els = self.soup.select('div#inner p:nth-of-type(3)')
|
||
|
|
assert len(els) == 1
|
||
|
|
assert els[0].string == 'Another'
|
||
|
|
|
||
|
|
# Try to select (non-existent!) fourth paragraph
|
||
|
|
els = self.soup.select('div#inner p:nth-of-type(4)')
|
||
|
|
assert len(els) == 0
|
||
|
|
|
||
|
|
# Zero will select no tags.
|
||
|
|
els = self.soup.select('div p:nth-of-type(0)')
|
||
|
|
assert len(els) == 0
|
||
|
|
|
||
|
|
def test_nth_of_type_direct_descendant(self):
|
||
|
|
els = self.soup.select('div#inner > p:nth-of-type(1)')
|
||
|
|
assert len(els) == 1
|
||
|
|
assert els[0].string == 'Some text'
|
||
|
|
|
||
|
|
def test_id_child_selector_nth_of_type(self):
|
||
|
|
self.assert_selects('#inner > p:nth-of-type(2)', ['p1'])
|
||
|
|
|
||
|
|
def test_select_on_element(self):
|
||
|
|
# Other tests operate on the tree; this operates on an element
|
||
|
|
# within the tree.
|
||
|
|
inner = self.soup.find("div", id="main")
|
||
|
|
selected = inner.select("div")
|
||
|
|
# The <div id="inner"> tag was selected. The <div id="footer">
|
||
|
|
# tag was not.
|
||
|
|
self.assert_selects_ids(selected, ['inner', 'data1'])
|
||
|
|
|
||
|
|
def test_overspecified_child_id(self):
|
||
|
|
self.assert_selects(".fancy #inner", ['inner'])
|
||
|
|
self.assert_selects(".normal #inner", [])
|
||
|
|
|
||
|
|
def test_adjacent_sibling_selector(self):
|
||
|
|
self.assert_selects('#p1 + h2', ['header2'])
|
||
|
|
self.assert_selects('#p1 + h2 + p', ['pmulti'])
|
||
|
|
self.assert_selects('#p1 + #header2 + .class1', ['pmulti'])
|
||
|
|
assert [] == self.soup.select('#p1 + p')
|
||
|
|
|
||
|
|
def test_general_sibling_selector(self):
|
||
|
|
self.assert_selects('#p1 ~ h2', ['header2', 'header3'])
|
||
|
|
self.assert_selects('#p1 ~ #header2', ['header2'])
|
||
|
|
self.assert_selects('#p1 ~ h2 + a', ['me'])
|
||
|
|
self.assert_selects('#p1 ~ h2 + [rel="me"]', ['me'])
|
||
|
|
assert [] == self.soup.select('#inner ~ h2')
|
||
|
|
|
||
|
|
def test_dangling_combinator(self):
|
||
|
|
with pytest.raises(SelectorSyntaxError):
|
||
|
|
self.soup.select('h1 >')
|
||
|
|
|
||
|
|
def test_sibling_combinator_wont_select_same_tag_twice(self):
|
||
|
|
self.assert_selects('p[lang] ~ p', ['lang-en-gb', 'lang-en-us', 'lang-fr'])
|
||
|
|
|
||
|
|
# Test the selector grouping operator (the comma)
|
||
|
|
def test_multiple_select(self):
|
||
|
|
self.assert_selects('x, y', ['xid', 'yid'])
|
||
|
|
|
||
|
|
def test_multiple_select_with_no_space(self):
|
||
|
|
self.assert_selects('x,y', ['xid', 'yid'])
|
||
|
|
|
||
|
|
def test_multiple_select_with_more_space(self):
|
||
|
|
self.assert_selects('x, y', ['xid', 'yid'])
|
||
|
|
|
||
|
|
def test_multiple_select_duplicated(self):
|
||
|
|
self.assert_selects('x, x', ['xid'])
|
||
|
|
|
||
|
|
def test_multiple_select_sibling(self):
|
||
|
|
self.assert_selects('x, y ~ p[lang=fr]', ['xid', 'lang-fr'])
|
||
|
|
|
||
|
|
def test_multiple_select_tag_and_direct_descendant(self):
|
||
|
|
self.assert_selects('x, y > z', ['xid', 'zidb'])
|
||
|
|
|
||
|
|
def test_multiple_select_direct_descendant_and_tags(self):
|
||
|
|
self.assert_selects('div > x, y, z', ['xid', 'yid', 'zida', 'zidb', 'zidab', 'zidac'])
|
||
|
|
|
||
|
|
def test_multiple_select_indirect_descendant(self):
|
||
|
|
self.assert_selects('div x,y, z', ['xid', 'yid', 'zida', 'zidb', 'zidab', 'zidac'])
|
||
|
|
|
||
|
|
def test_invalid_multiple_select(self):
|
||
|
|
with pytest.raises(SelectorSyntaxError):
|
||
|
|
self.soup.select(',x, y')
|
||
|
|
with pytest.raises(SelectorSyntaxError):
|
||
|
|
self.soup.select('x,,y')
|
||
|
|
|
||
|
|
def test_multiple_select_attrs(self):
|
||
|
|
self.assert_selects('p[lang=en], p[lang=en-gb]', ['lang-en', 'lang-en-gb'])
|
||
|
|
|
||
|
|
def test_multiple_select_ids(self):
|
||
|
|
self.assert_selects('x, y > z[id=zida], z[id=zidab], z[id=zidb]', ['xid', 'zidb', 'zidab'])
|
||
|
|
|
||
|
|
def test_multiple_select_nested(self):
|
||
|
|
self.assert_selects('body > div > x, y > z', ['xid', 'zidb'])
|
||
|
|
|
||
|
|
def test_select_duplicate_elements(self):
|
||
|
|
# When markup contains duplicate elements, a multiple select
|
||
|
|
# will find all of them.
|
||
|
|
markup = '<div class="c1"/><div class="c2"/><div class="c1"/>'
|
||
|
|
soup = BeautifulSoup(markup, 'html.parser')
|
||
|
|
selected = soup.select(".c1, .c2")
|
||
|
|
assert 3 == len(selected)
|
||
|
|
|
||
|
|
# Verify that find_all finds the same elements, though because
|
||
|
|
# of an implementation detail it finds them in a different
|
||
|
|
# order.
|
||
|
|
for element in soup.find_all(class_=['c1', 'c2']):
|
||
|
|
assert element in selected
|
||
|
|
|
||
|
|
def test_closest(self):
|
||
|
|
inner = self.soup.find("div", id="inner")
|
||
|
|
closest = inner.css.closest("div[id=main]")
|
||
|
|
assert closest == self.soup.find("div", id="main")
|
||
|
|
|
||
|
|
def test_match(self):
|
||
|
|
inner = self.soup.find("div", id="inner")
|
||
|
|
main = self.soup.find("div", id="main")
|
||
|
|
assert inner.css.match("div[id=main]") == False
|
||
|
|
assert main.css.match("div[id=main]") == True
|
||
|
|
|
||
|
|
def test_iselect(self):
|
||
|
|
gen = self.soup.css.iselect("h2")
|
||
|
|
assert isinstance(gen, types.GeneratorType)
|
||
|
|
[header2, header3] = gen
|
||
|
|
assert header2['id'] == 'header2'
|
||
|
|
assert header3['id'] == 'header3'
|
||
|
|
|
||
|
|
def test_filter(self):
|
||
|
|
inner = self.soup.find("div", id="inner")
|
||
|
|
results = inner.css.filter("h2")
|
||
|
|
assert len(inner.css.filter("h2")) == 2
|
||
|
|
|
||
|
|
results = inner.css.filter("h2[id=header3]")
|
||
|
|
assert isinstance(results, ResultSet)
|
||
|
|
[result] = results
|
||
|
|
assert result['id'] == 'header3'
|
||
|
|
|
||
|
|
def test_escape(self):
|
||
|
|
m = self.soup.css.escape
|
||
|
|
assert m(".foo#bar") == '\\.foo\\#bar'
|
||
|
|
assert m("()[]{}") == '\\(\\)\\[\\]\\{\\}'
|
||
|
|
assert m(".foo") == self.soup.css.escape(".foo")
|