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Diffstat (limited to 'import-layers/yocto-poky/bitbake/lib/bs4/testing.py')
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1 files changed, 592 insertions, 0 deletions
diff --git a/import-layers/yocto-poky/bitbake/lib/bs4/testing.py b/import-layers/yocto-poky/bitbake/lib/bs4/testing.py new file mode 100644 index 000000000..fd4495ac5 --- /dev/null +++ b/import-layers/yocto-poky/bitbake/lib/bs4/testing.py @@ -0,0 +1,592 @@ +"""Helper classes for tests.""" + +import copy +import functools +import unittest +from unittest import TestCase +from bs4 import BeautifulSoup +from bs4.element import ( + CharsetMetaAttributeValue, + Comment, + ContentMetaAttributeValue, + Doctype, + SoupStrainer, +) + +from bs4.builder import HTMLParserTreeBuilder +default_builder = HTMLParserTreeBuilder + + +class SoupTest(unittest.TestCase): + + @property + def default_builder(self): + return default_builder() + + def soup(self, markup, **kwargs): + """Build a Beautiful Soup object from markup.""" + builder = kwargs.pop('builder', self.default_builder) + return BeautifulSoup(markup, builder=builder, **kwargs) + + def document_for(self, markup): + """Turn an HTML fragment into a document. + + The details depend on the builder. + """ + return self.default_builder.test_fragment_to_document(markup) + + def assertSoupEquals(self, to_parse, compare_parsed_to=None): + builder = self.default_builder + obj = BeautifulSoup(to_parse, builder=builder) + if compare_parsed_to is None: + compare_parsed_to = to_parse + + self.assertEqual(obj.decode(), self.document_for(compare_parsed_to)) + + +class HTMLTreeBuilderSmokeTest(object): + + """A basic test of a treebuilder's competence. + + Any HTML treebuilder, present or future, should be able to pass + these tests. With invalid markup, there's room for interpretation, + and different parsers can handle it differently. But with the + markup in these tests, there's not much room for interpretation. + """ + + def assertDoctypeHandled(self, doctype_fragment): + """Assert that a given doctype string is handled correctly.""" + doctype_str, soup = self._document_with_doctype(doctype_fragment) + + # Make sure a Doctype object was created. + doctype = soup.contents[0] + self.assertEqual(doctype.__class__, Doctype) + self.assertEqual(doctype, doctype_fragment) + self.assertEqual(str(soup)[:len(doctype_str)], doctype_str) + + # Make sure that the doctype was correctly associated with the + # parse tree and that the rest of the document parsed. + self.assertEqual(soup.p.contents[0], 'foo') + + def _document_with_doctype(self, doctype_fragment): + """Generate and parse a document with the given doctype.""" + doctype = '<!DOCTYPE %s>' % doctype_fragment + markup = doctype + '\n<p>foo</p>' + soup = self.soup(markup) + return doctype, soup + + def test_normal_doctypes(self): + """Make sure normal, everyday HTML doctypes are handled correctly.""" + self.assertDoctypeHandled("html") + self.assertDoctypeHandled( + 'html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"') + + def test_empty_doctype(self): + soup = self.soup("<!DOCTYPE>") + doctype = soup.contents[0] + self.assertEqual("", doctype.strip()) + + def test_public_doctype_with_url(self): + doctype = 'html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"' + self.assertDoctypeHandled(doctype) + + def test_system_doctype(self): + self.assertDoctypeHandled('foo SYSTEM "http://www.example.com/"') + + def test_namespaced_system_doctype(self): + # We can handle a namespaced doctype with a system ID. + self.assertDoctypeHandled('xsl:stylesheet SYSTEM "htmlent.dtd"') + + def test_namespaced_public_doctype(self): + # Test a namespaced doctype with a public id. + self.assertDoctypeHandled('xsl:stylesheet PUBLIC "htmlent.dtd"') + + def test_real_xhtml_document(self): + """A real XHTML document should come out more or less the same as it went in.""" + markup = b"""<?xml version="1.0" encoding="utf-8"?> +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"> +<html xmlns="http://www.w3.org/1999/xhtml"> +<head><title>Hello.</title></head> +<body>Goodbye.</body> +</html>""" + soup = self.soup(markup) + self.assertEqual( + soup.encode("utf-8").replace(b"\n", b""), + markup.replace(b"\n", b"")) + + def test_deepcopy(self): + """Make sure you can copy the tree builder. + + This is important because the builder is part of a + BeautifulSoup object, and we want to be able to copy that. + """ + copy.deepcopy(self.default_builder) + + def test_p_tag_is_never_empty_element(self): + """A <p> tag is never designated as an empty-element tag. + + Even if the markup shows it as an empty-element tag, it + shouldn't be presented that way. + """ + soup = self.soup("<p/>") + self.assertFalse(soup.p.is_empty_element) + self.assertEqual(str(soup.p), "<p></p>") + + def test_unclosed_tags_get_closed(self): + """A tag that's not closed by the end of the document should be closed. + + This applies to all tags except empty-element tags. + """ + self.assertSoupEquals("<p>", "<p></p>") + self.assertSoupEquals("<b>", "<b></b>") + + self.assertSoupEquals("<br>", "<br/>") + + def test_br_is_always_empty_element_tag(self): + """A <br> tag is designated as an empty-element tag. + + Some parsers treat <br></br> as one <br/> tag, some parsers as + two tags, but it should always be an empty-element tag. + """ + soup = self.soup("<br></br>") + self.assertTrue(soup.br.is_empty_element) + self.assertEqual(str(soup.br), "<br/>") + + def test_nested_formatting_elements(self): + self.assertSoupEquals("<em><em></em></em>") + + def test_comment(self): + # Comments are represented as Comment objects. + markup = "<p>foo<!--foobar-->baz</p>" + self.assertSoupEquals(markup) + + soup = self.soup(markup) + comment = soup.find(text="foobar") + self.assertEqual(comment.__class__, Comment) + + # The comment is properly integrated into the tree. + foo = soup.find(text="foo") + self.assertEqual(comment, foo.next_element) + baz = soup.find(text="baz") + self.assertEqual(comment, baz.previous_element) + + def test_preserved_whitespace_in_pre_and_textarea(self): + """Whitespace must be preserved in <pre> and <textarea> tags.""" + self.assertSoupEquals("<pre> </pre>") + self.assertSoupEquals("<textarea> woo </textarea>") + + def test_nested_inline_elements(self): + """Inline elements can be nested indefinitely.""" + b_tag = "<b>Inside a B tag</b>" + self.assertSoupEquals(b_tag) + + nested_b_tag = "<p>A <i>nested <b>tag</b></i></p>" + self.assertSoupEquals(nested_b_tag) + + double_nested_b_tag = "<p>A <a>doubly <i>nested <b>tag</b></i></a></p>" + self.assertSoupEquals(nested_b_tag) + + def test_nested_block_level_elements(self): + """Block elements can be nested.""" + soup = self.soup('<blockquote><p><b>Foo</b></p></blockquote>') + blockquote = soup.blockquote + self.assertEqual(blockquote.p.b.string, 'Foo') + self.assertEqual(blockquote.b.string, 'Foo') + + def test_correctly_nested_tables(self): + """One table can go inside another one.""" + markup = ('<table id="1">' + '<tr>' + "<td>Here's another table:" + '<table id="2">' + '<tr><td>foo</td></tr>' + '</table></td>') + + self.assertSoupEquals( + markup, + '<table id="1"><tr><td>Here\'s another table:' + '<table id="2"><tr><td>foo</td></tr></table>' + '</td></tr></table>') + + self.assertSoupEquals( + "<table><thead><tr><td>Foo</td></tr></thead>" + "<tbody><tr><td>Bar</td></tr></tbody>" + "<tfoot><tr><td>Baz</td></tr></tfoot></table>") + + def test_deeply_nested_multivalued_attribute(self): + # html5lib can set the attributes of the same tag many times + # as it rearranges the tree. This has caused problems with + # multivalued attributes. + markup = '<table><div><div class="css"></div></div></table>' + soup = self.soup(markup) + self.assertEqual(["css"], soup.div.div['class']) + + def test_angle_brackets_in_attribute_values_are_escaped(self): + self.assertSoupEquals('<a b="<a>"></a>', '<a b="<a>"></a>') + + def test_entities_in_attributes_converted_to_unicode(self): + expect = u'<p id="pi\N{LATIN SMALL LETTER N WITH TILDE}ata"></p>' + self.assertSoupEquals('<p id="piñata"></p>', expect) + self.assertSoupEquals('<p id="piñata"></p>', expect) + self.assertSoupEquals('<p id="piñata"></p>', expect) + self.assertSoupEquals('<p id="piñata"></p>', expect) + + def test_entities_in_text_converted_to_unicode(self): + expect = u'<p>pi\N{LATIN SMALL LETTER N WITH TILDE}ata</p>' + self.assertSoupEquals("<p>piñata</p>", expect) + self.assertSoupEquals("<p>piñata</p>", expect) + self.assertSoupEquals("<p>piñata</p>", expect) + self.assertSoupEquals("<p>piñata</p>", expect) + + def test_quot_entity_converted_to_quotation_mark(self): + self.assertSoupEquals("<p>I said "good day!"</p>", + '<p>I said "good day!"</p>') + + def test_out_of_range_entity(self): + expect = u"\N{REPLACEMENT CHARACTER}" + self.assertSoupEquals("�", expect) + self.assertSoupEquals("�", expect) + self.assertSoupEquals("�", expect) + + def test_multipart_strings(self): + "Mostly to prevent a recurrence of a bug in the html5lib treebuilder." + soup = self.soup("<html><h2>\nfoo</h2><p></p></html>") + self.assertEqual("p", soup.h2.string.next_element.name) + self.assertEqual("p", soup.p.name) + + def test_basic_namespaces(self): + """Parsers don't need to *understand* namespaces, but at the + very least they should not choke on namespaces or lose + data.""" + + markup = b'<html xmlns="http://www.w3.org/1999/xhtml" xmlns:mathml="http://www.w3.org/1998/Math/MathML" xmlns:svg="http://www.w3.org/2000/svg"><head></head><body><mathml:msqrt>4</mathml:msqrt><b svg:fill="red"></b></body></html>' + soup = self.soup(markup) + self.assertEqual(markup, soup.encode()) + html = soup.html + self.assertEqual('http://www.w3.org/1999/xhtml', soup.html['xmlns']) + self.assertEqual( + 'http://www.w3.org/1998/Math/MathML', soup.html['xmlns:mathml']) + self.assertEqual( + 'http://www.w3.org/2000/svg', soup.html['xmlns:svg']) + + def test_multivalued_attribute_value_becomes_list(self): + markup = b'<a class="foo bar">' + soup = self.soup(markup) + self.assertEqual(['foo', 'bar'], soup.a['class']) + + # + # Generally speaking, tests below this point are more tests of + # Beautiful Soup than tests of the tree builders. But parsers are + # weird, so we run these tests separately for every tree builder + # to detect any differences between them. + # + + def test_can_parse_unicode_document(self): + # A seemingly innocuous document... but it's in Unicode! And + # it contains characters that can't be represented in the + # encoding found in the declaration! The horror! + markup = u'<html><head><meta encoding="euc-jp"></head><body>Sacr\N{LATIN SMALL LETTER E WITH ACUTE} bleu!</body>' + soup = self.soup(markup) + self.assertEqual(u'Sacr\xe9 bleu!', soup.body.string) + + def test_soupstrainer(self): + """Parsers should be able to work with SoupStrainers.""" + strainer = SoupStrainer("b") + soup = self.soup("A <b>bold</b> <meta/> <i>statement</i>", + parse_only=strainer) + self.assertEqual(soup.decode(), "<b>bold</b>") + + def test_single_quote_attribute_values_become_double_quotes(self): + self.assertSoupEquals("<foo attr='bar'></foo>", + '<foo attr="bar"></foo>') + + def test_attribute_values_with_nested_quotes_are_left_alone(self): + text = """<foo attr='bar "brawls" happen'>a</foo>""" + self.assertSoupEquals(text) + + def test_attribute_values_with_double_nested_quotes_get_quoted(self): + text = """<foo attr='bar "brawls" happen'>a</foo>""" + soup = self.soup(text) + soup.foo['attr'] = 'Brawls happen at "Bob\'s Bar"' + self.assertSoupEquals( + soup.foo.decode(), + """<foo attr="Brawls happen at "Bob\'s Bar"">a</foo>""") + + def test_ampersand_in_attribute_value_gets_escaped(self): + self.assertSoupEquals('<this is="really messed up & stuff"></this>', + '<this is="really messed up & stuff"></this>') + + self.assertSoupEquals( + '<a href="http://example.org?a=1&b=2;3">foo</a>', + '<a href="http://example.org?a=1&b=2;3">foo</a>') + + def test_escaped_ampersand_in_attribute_value_is_left_alone(self): + self.assertSoupEquals('<a href="http://example.org?a=1&b=2;3"></a>') + + def test_entities_in_strings_converted_during_parsing(self): + # Both XML and HTML entities are converted to Unicode characters + # during parsing. + text = "<p><<sacré bleu!>></p>" + expected = u"<p><<sacr\N{LATIN SMALL LETTER E WITH ACUTE} bleu!>></p>" + self.assertSoupEquals(text, expected) + + def test_smart_quotes_converted_on_the_way_in(self): + # Microsoft smart quotes are converted to Unicode characters during + # parsing. + quote = b"<p>\x91Foo\x92</p>" + soup = self.soup(quote) + self.assertEqual( + soup.p.string, + u"\N{LEFT SINGLE QUOTATION MARK}Foo\N{RIGHT SINGLE QUOTATION MARK}") + + def test_non_breaking_spaces_converted_on_the_way_in(self): + soup = self.soup("<a> </a>") + self.assertEqual(soup.a.string, u"\N{NO-BREAK SPACE}" * 2) + + def test_entities_converted_on_the_way_out(self): + text = "<p><<sacré bleu!>></p>" + expected = u"<p><<sacr\N{LATIN SMALL LETTER E WITH ACUTE} bleu!>></p>".encode("utf-8") + soup = self.soup(text) + self.assertEqual(soup.p.encode("utf-8"), expected) + + def test_real_iso_latin_document(self): + # Smoke test of interrelated functionality, using an + # easy-to-understand document. + + # Here it is in Unicode. Note that it claims to be in ISO-Latin-1. + unicode_html = u'<html><head><meta content="text/html; charset=ISO-Latin-1" http-equiv="Content-type"/></head><body><p>Sacr\N{LATIN SMALL LETTER E WITH ACUTE} bleu!</p></body></html>' + + # That's because we're going to encode it into ISO-Latin-1, and use + # that to test. + iso_latin_html = unicode_html.encode("iso-8859-1") + + # Parse the ISO-Latin-1 HTML. + soup = self.soup(iso_latin_html) + # Encode it to UTF-8. + result = soup.encode("utf-8") + + # What do we expect the result to look like? Well, it would + # look like unicode_html, except that the META tag would say + # UTF-8 instead of ISO-Latin-1. + expected = unicode_html.replace("ISO-Latin-1", "utf-8") + + # And, of course, it would be in UTF-8, not Unicode. + expected = expected.encode("utf-8") + + # Ta-da! + self.assertEqual(result, expected) + + def test_real_shift_jis_document(self): + # Smoke test to make sure the parser can handle a document in + # Shift-JIS encoding, without choking. + shift_jis_html = ( + b'<html><head></head><body><pre>' + b'\x82\xb1\x82\xea\x82\xcdShift-JIS\x82\xc5\x83R\x81[\x83f' + b'\x83B\x83\x93\x83O\x82\xb3\x82\xea\x82\xbd\x93\xfa\x96{\x8c' + b'\xea\x82\xcc\x83t\x83@\x83C\x83\x8b\x82\xc5\x82\xb7\x81B' + b'</pre></body></html>') + unicode_html = shift_jis_html.decode("shift-jis") + soup = self.soup(unicode_html) + + # Make sure the parse tree is correctly encoded to various + # encodings. + self.assertEqual(soup.encode("utf-8"), unicode_html.encode("utf-8")) + self.assertEqual(soup.encode("euc_jp"), unicode_html.encode("euc_jp")) + + def test_real_hebrew_document(self): + # A real-world test to make sure we can convert ISO-8859-9 (a + # Hebrew encoding) to UTF-8. + hebrew_document = b'<html><head><title>Hebrew (ISO 8859-8) in Visual Directionality</title></head><body><h1>Hebrew (ISO 8859-8) in Visual Directionality</h1>\xed\xe5\xec\xf9</body></html>' + soup = self.soup( + hebrew_document, from_encoding="iso8859-8") + self.assertEqual(soup.original_encoding, 'iso8859-8') + self.assertEqual( + soup.encode('utf-8'), + hebrew_document.decode("iso8859-8").encode("utf-8")) + + def test_meta_tag_reflects_current_encoding(self): + # Here's the <meta> tag saying that a document is + # encoded in Shift-JIS. + meta_tag = ('<meta content="text/html; charset=x-sjis" ' + 'http-equiv="Content-type"/>') + + # Here's a document incorporating that meta tag. + shift_jis_html = ( + '<html><head>\n%s\n' + '<meta http-equiv="Content-language" content="ja"/>' + '</head><body>Shift-JIS markup goes here.') % meta_tag + soup = self.soup(shift_jis_html) + + # Parse the document, and the charset is seemingly unaffected. + parsed_meta = soup.find('meta', {'http-equiv': 'Content-type'}) + content = parsed_meta['content'] + self.assertEqual('text/html; charset=x-sjis', content) + + # But that value is actually a ContentMetaAttributeValue object. + self.assertTrue(isinstance(content, ContentMetaAttributeValue)) + + # And it will take on a value that reflects its current + # encoding. + self.assertEqual('text/html; charset=utf8', content.encode("utf8")) + + # For the rest of the story, see TestSubstitutions in + # test_tree.py. + + def test_html5_style_meta_tag_reflects_current_encoding(self): + # Here's the <meta> tag saying that a document is + # encoded in Shift-JIS. + meta_tag = ('<meta id="encoding" charset="x-sjis" />') + + # Here's a document incorporating that meta tag. + shift_jis_html = ( + '<html><head>\n%s\n' + '<meta http-equiv="Content-language" content="ja"/>' + '</head><body>Shift-JIS markup goes here.') % meta_tag + soup = self.soup(shift_jis_html) + + # Parse the document, and the charset is seemingly unaffected. + parsed_meta = soup.find('meta', id="encoding") + charset = parsed_meta['charset'] + self.assertEqual('x-sjis', charset) + + # But that value is actually a CharsetMetaAttributeValue object. + self.assertTrue(isinstance(charset, CharsetMetaAttributeValue)) + + # And it will take on a value that reflects its current + # encoding. + self.assertEqual('utf8', charset.encode("utf8")) + + def test_tag_with_no_attributes_can_have_attributes_added(self): + data = self.soup("<a>text</a>") + data.a['foo'] = 'bar' + self.assertEqual('<a foo="bar">text</a>', data.a.decode()) + +class XMLTreeBuilderSmokeTest(object): + + def test_docstring_generated(self): + soup = self.soup("<root/>") + self.assertEqual( + soup.encode(), b'<?xml version="1.0" encoding="utf-8"?>\n<root/>') + + def test_real_xhtml_document(self): + """A real XHTML document should come out *exactly* the same as it went in.""" + markup = b"""<?xml version="1.0" encoding="utf-8"?> +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN"> +<html xmlns="http://www.w3.org/1999/xhtml"> +<head><title>Hello.</title></head> +<body>Goodbye.</body> +</html>""" + soup = self.soup(markup) + self.assertEqual( + soup.encode("utf-8"), markup) + + def test_formatter_processes_script_tag_for_xml_documents(self): + doc = """ + <script type="text/javascript"> + </script> +""" + soup = BeautifulSoup(doc, "xml") + # lxml would have stripped this while parsing, but we can add + # it later. + soup.script.string = 'console.log("< < hey > > ");' + encoded = soup.encode() + self.assertTrue(b"< < hey > >" in encoded) + + def test_can_parse_unicode_document(self): + markup = u'<?xml version="1.0" encoding="euc-jp"><root>Sacr\N{LATIN SMALL LETTER E WITH ACUTE} bleu!</root>' + soup = self.soup(markup) + self.assertEqual(u'Sacr\xe9 bleu!', soup.root.string) + + def test_popping_namespaced_tag(self): + markup = '<rss xmlns:dc="foo"><dc:creator>b</dc:creator><dc:date>2012-07-02T20:33:42Z</dc:date><dc:rights>c</dc:rights><image>d</image></rss>' + soup = self.soup(markup) + self.assertEqual( + unicode(soup.rss), markup) + + def test_docstring_includes_correct_encoding(self): + soup = self.soup("<root/>") + self.assertEqual( + soup.encode("latin1"), + b'<?xml version="1.0" encoding="latin1"?>\n<root/>') + + def test_large_xml_document(self): + """A large XML document should come out the same as it went in.""" + markup = (b'<?xml version="1.0" encoding="utf-8"?>\n<root>' + + b'0' * (2**12) + + b'</root>') + soup = self.soup(markup) + self.assertEqual(soup.encode("utf-8"), markup) + + + def test_tags_are_empty_element_if_and_only_if_they_are_empty(self): + self.assertSoupEquals("<p>", "<p/>") + self.assertSoupEquals("<p>foo</p>") + + def test_namespaces_are_preserved(self): + markup = '<root xmlns:a="http://example.com/" xmlns:b="http://example.net/"><a:foo>This tag is in the a namespace</a:foo><b:foo>This tag is in the b namespace</b:foo></root>' + soup = self.soup(markup) + root = soup.root + self.assertEqual("http://example.com/", root['xmlns:a']) + self.assertEqual("http://example.net/", root['xmlns:b']) + + def test_closing_namespaced_tag(self): + markup = '<p xmlns:dc="http://purl.org/dc/elements/1.1/"><dc:date>20010504</dc:date></p>' + soup = self.soup(markup) + self.assertEqual(unicode(soup.p), markup) + + def test_namespaced_attributes(self): + markup = '<foo xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"><bar xsi:schemaLocation="http://www.example.com"/></foo>' + soup = self.soup(markup) + self.assertEqual(unicode(soup.foo), markup) + + def test_namespaced_attributes_xml_namespace(self): + markup = '<foo xml:lang="fr">bar</foo>' + soup = self.soup(markup) + self.assertEqual(unicode(soup.foo), markup) + +class HTML5TreeBuilderSmokeTest(HTMLTreeBuilderSmokeTest): + """Smoke test for a tree builder that supports HTML5.""" + + def test_real_xhtml_document(self): + # Since XHTML is not HTML5, HTML5 parsers are not tested to handle + # XHTML documents in any particular way. + pass + + def test_html_tags_have_namespace(self): + markup = "<a>" + soup = self.soup(markup) + self.assertEqual("http://www.w3.org/1999/xhtml", soup.a.namespace) + + def test_svg_tags_have_namespace(self): + markup = '<svg><circle/></svg>' + soup = self.soup(markup) + namespace = "http://www.w3.org/2000/svg" + self.assertEqual(namespace, soup.svg.namespace) + self.assertEqual(namespace, soup.circle.namespace) + + + def test_mathml_tags_have_namespace(self): + markup = '<math><msqrt>5</msqrt></math>' + soup = self.soup(markup) + namespace = 'http://www.w3.org/1998/Math/MathML' + self.assertEqual(namespace, soup.math.namespace) + self.assertEqual(namespace, soup.msqrt.namespace) + + def test_xml_declaration_becomes_comment(self): + markup = '<?xml version="1.0" encoding="utf-8"?><html></html>' + soup = self.soup(markup) + self.assertTrue(isinstance(soup.contents[0], Comment)) + self.assertEqual(soup.contents[0], '?xml version="1.0" encoding="utf-8"?') + self.assertEqual("html", soup.contents[0].next_element.name) + +def skipIf(condition, reason): + def nothing(test, *args, **kwargs): + return None + + def decorator(test_item): + if condition: + return nothing + else: + return test_item + + return decorator |
