feat(agent): scrape linked pages to ground answers in real content
Adds `_fetch_page_content()`, which downloads a URL with a browser-like User-Agent and uses BeautifulSoup with the lxml parser to strip scripts, navigation, and other non-content markup, returning up to 3000 characters of readable text. The response validator now also compares generated replies against this scraped text, flagging named entities and claims that do not appear in the retrieved page content. Dependencies: adds beautifulsoup4==4.12.3 and pins lxml==5.3.0 for parser compatibility.
This commit is contained in:
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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):
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self.soup.select("a:nth-of-type(a)")
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def test_nth_of_type(self):
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# Try to select first paragraph
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els = self.soup.select('div#inner p:nth-of-type(1)')
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assert len(els) == 1
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assert els[0].string == 'Some text'
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# Try to select third paragraph
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els = self.soup.select('div#inner p:nth-of-type(3)')
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assert len(els) == 1
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assert els[0].string == 'Another'
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# Try to select (non-existent!) fourth paragraph
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els = self.soup.select('div#inner p:nth-of-type(4)')
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assert len(els) == 0
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# Zero will select no tags.
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els = self.soup.select('div p:nth-of-type(0)')
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assert len(els) == 0
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def test_nth_of_type_direct_descendant(self):
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els = self.soup.select('div#inner > p:nth-of-type(1)')
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assert len(els) == 1
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assert els[0].string == 'Some text'
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def test_id_child_selector_nth_of_type(self):
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self.assert_selects('#inner > p:nth-of-type(2)', ['p1'])
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def test_select_on_element(self):
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# Other tests operate on the tree; this operates on an element
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# within the tree.
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inner = self.soup.find("div", id="main")
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selected = inner.select("div")
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# The <div id="inner"> tag was selected. The <div id="footer">
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# tag was not.
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self.assert_selects_ids(selected, ['inner', 'data1'])
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def test_overspecified_child_id(self):
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self.assert_selects(".fancy #inner", ['inner'])
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self.assert_selects(".normal #inner", [])
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def test_adjacent_sibling_selector(self):
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self.assert_selects('#p1 + h2', ['header2'])
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self.assert_selects('#p1 + h2 + p', ['pmulti'])
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self.assert_selects('#p1 + #header2 + .class1', ['pmulti'])
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assert [] == self.soup.select('#p1 + p')
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def test_general_sibling_selector(self):
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self.assert_selects('#p1 ~ h2', ['header2', 'header3'])
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self.assert_selects('#p1 ~ #header2', ['header2'])
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self.assert_selects('#p1 ~ h2 + a', ['me'])
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self.assert_selects('#p1 ~ h2 + [rel="me"]', ['me'])
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assert [] == self.soup.select('#inner ~ h2')
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def test_dangling_combinator(self):
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with pytest.raises(SelectorSyntaxError):
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self.soup.select('h1 >')
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|
||||
def test_sibling_combinator_wont_select_same_tag_twice(self):
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self.assert_selects('p[lang] ~ p', ['lang-en-gb', 'lang-en-us', 'lang-fr'])
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|
||||
# Test the selector grouping operator (the comma)
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def test_multiple_select(self):
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self.assert_selects('x, y', ['xid', 'yid'])
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||||
|
||||
def test_multiple_select_with_no_space(self):
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self.assert_selects('x,y', ['xid', 'yid'])
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||||
|
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def test_multiple_select_with_more_space(self):
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self.assert_selects('x, y', ['xid', 'yid'])
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||||
def test_multiple_select_duplicated(self):
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self.assert_selects('x, x', ['xid'])
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||||
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||||
def test_multiple_select_sibling(self):
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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")
|
||||
Reference in New Issue
Block a user