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Diffstat (limited to 'bs4/tests/testing.py')
| -rw-r--r-- | bs4/tests/testing.py | 1118 |
1 files changed, 1118 insertions, 0 deletions
diff --git a/bs4/tests/testing.py b/bs4/tests/testing.py new file mode 100644 index 0000000..97914c0 --- /dev/null +++ b/bs4/tests/testing.py @@ -0,0 +1,1118 @@ +# encoding: utf-8 +"""Helper classes for tests.""" + +# Use of this source code is governed by the MIT license. +__license__ = "MIT" + +import pickle +import copy +import functools +import warnings +import pytest +from bs4 import BeautifulSoup +from bs4.element import ( + CharsetMetaAttributeValue, + Comment, + ContentMetaAttributeValue, + Doctype, + PYTHON_SPECIFIC_ENCODINGS, + SoupStrainer, + Script, + Stylesheet, + Tag +) + +from bs4.builder import HTMLParserTreeBuilder +default_builder = HTMLParserTreeBuilder + +BAD_DOCUMENT = """A bare string +<!DOCTYPE xsl:stylesheet SYSTEM "htmlent.dtd"> +<!DOCTYPE xsl:stylesheet PUBLIC "htmlent.dtd"> +<div><![CDATA[A CDATA section where it doesn't belong]]></div> +<div><svg><![CDATA[HTML5 does allow CDATA sections in SVG]]></svg></div> +<div>A <meta> tag</div> +<div>A <br> tag that supposedly has contents.</br></div> +<div>AT&T</div> +<div><textarea>Within a textarea, markup like <b> tags and <&<& should be treated as literal</textarea></div> +<div><script>if (i < 2) { alert("<b>Markup within script tags should be treated as literal.</b>"); }</script></div> +<div>This numeric entity is missing the final semicolon: <x t="piñata"></div> +<div><a href="http://example.com/</a> that attribute value never got closed</div> +<div><a href="foo</a>, </a><a href="bar">that attribute value was closed by the subsequent tag</a></div> +<! This document starts with a bogus declaration ><div>a</div> +<div>This document contains <!an incomplete declaration <div>(do you see it?)</div> +<div>This document ends with <!an incomplete declaration +<div><a style={height:21px;}>That attribute value was bogus</a></div> +<! DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN">The doctype is invalid because it contains extra whitespace +<div><table><td nowrap>That boolean attribute had no value</td></table></div> +<div>Here's a nonexistent entity: &#foo; (do you see it?)</div> +<div>This document ends before the entity finishes: > +<div><p>Paragraphs shouldn't contain block display elements, but this one does: <dl><dt>you see?</dt></p> +<b b="20" a="1" b="10" a="2" a="3" a="4">Multiple values for the same attribute.</b> +<div><table><tr><td>Here's a table</td></tr></table></div> +<div><table id="1"><tr><td>Here's a nested table:<table id="2"><tr><td>foo</td></tr></table></td></div> +<div>This tag contains nothing but whitespace: <b> </b></div> +<div><blockquote><p><b>This p tag is cut off by</blockquote></p>the end of the blockquote tag</div> +<div><table><div>This table contains bare markup</div></table></div> +<div><div id="1">\n <a href="link1">This link is never closed.\n</div>\n<div id="2">\n <div id="3">\n <a href="link2">This link is closed.</a>\n </div>\n</div></div> +<div>This document contains a <!DOCTYPE surprise>surprise doctype</div> +<div><a><B><Cd><EFG>Mixed case tags are folded to lowercase</efg></CD></b></A></div> +<div><our\u2603>Tag name contains Unicode characters</our\u2603></div> +<div><a \u2603="snowman">Attribute name contains Unicode characters</a></div> +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> +""" + + +class SoupTest(object): + + @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, **kwargs): + """Turn an HTML fragment into a document. + + The details depend on the builder. + """ + return self.default_builder(**kwargs).test_fragment_to_document(markup) + + def assert_soup(self, to_parse, compare_parsed_to=None): + """Parse some markup using Beautiful Soup and verify that + the output markup is as expected. + """ + builder = self.default_builder + obj = BeautifulSoup(to_parse, builder=builder) + if compare_parsed_to is None: + compare_parsed_to = to_parse + + # Verify that the documents come out the same. + assert obj.decode() == self.document_for(compare_parsed_to) + + # Also run some checks on the BeautifulSoup object itself: + + # Verify that every tag that was opened was eventually closed. + + # There are no tags in the open tag counter. + assert all(v==0 for v in list(obj.open_tag_counter.values())) + + # The only tag in the tag stack is the one for the root + # document. + assert [obj.ROOT_TAG_NAME] == [x.name for x in obj.tagStack] + + assertSoupEquals = assert_soup + + def assertConnectedness(self, element): + """Ensure that next_element and previous_element are properly + set for all descendants of the given element. + """ + earlier = None + for e in element.descendants: + if earlier: + assert e == earlier.next_element + assert earlier == e.previous_element + earlier = e + + def linkage_validator(self, el, _recursive_call=False): + """Ensure proper linkage throughout the document.""" + descendant = None + # Document element should have no previous element or previous sibling. + # It also shouldn't have a next sibling. + if el.parent is None: + assert el.previous_element is None,\ + "Bad previous_element\nNODE: {}\nPREV: {}\nEXPECTED: {}".format( + el, el.previous_element, None + ) + assert el.previous_sibling is None,\ + "Bad previous_sibling\nNODE: {}\nPREV: {}\nEXPECTED: {}".format( + el, el.previous_sibling, None + ) + assert el.next_sibling is None,\ + "Bad next_sibling\nNODE: {}\nNEXT: {}\nEXPECTED: {}".format( + el, el.next_sibling, None + ) + + idx = 0 + child = None + last_child = None + last_idx = len(el.contents) - 1 + for child in el.contents: + descendant = None + + # Parent should link next element to their first child + # That child should have no previous sibling + if idx == 0: + if el.parent is not None: + assert el.next_element is child,\ + "Bad next_element\nNODE: {}\nNEXT: {}\nEXPECTED: {}".format( + el, el.next_element, child + ) + assert child.previous_element is el,\ + "Bad previous_element\nNODE: {}\nPREV: {}\nEXPECTED: {}".format( + child, child.previous_element, el + ) + assert child.previous_sibling is None,\ + "Bad previous_sibling\nNODE: {}\nPREV {}\nEXPECTED: {}".format( + child, child.previous_sibling, None + ) + + # If not the first child, previous index should link as sibling to this index + # Previous element should match the last index or the last bubbled up descendant + else: + assert child.previous_sibling is el.contents[idx - 1],\ + "Bad previous_sibling\nNODE: {}\nPREV {}\nEXPECTED {}".format( + child, child.previous_sibling, el.contents[idx - 1] + ) + assert el.contents[idx - 1].next_sibling is child,\ + "Bad next_sibling\nNODE: {}\nNEXT {}\nEXPECTED {}".format( + el.contents[idx - 1], el.contents[idx - 1].next_sibling, child + ) + + if last_child is not None: + assert child.previous_element is last_child,\ + "Bad previous_element\nNODE: {}\nPREV {}\nEXPECTED {}\nCONTENTS {}".format( + child, child.previous_element, last_child, child.parent.contents + ) + assert last_child.next_element is child,\ + "Bad next_element\nNODE: {}\nNEXT {}\nEXPECTED {}".format( + last_child, last_child.next_element, child + ) + + if isinstance(child, Tag) and child.contents: + descendant = self.linkage_validator(child, True) + # A bubbled up descendant should have no next siblings + assert descendant.next_sibling is None,\ + "Bad next_sibling\nNODE: {}\nNEXT {}\nEXPECTED {}".format( + descendant, descendant.next_sibling, None + ) + + # Mark last child as either the bubbled up descendant or the current child + if descendant is not None: + last_child = descendant + else: + last_child = child + + # If last child, there are non next siblings + if idx == last_idx: + assert child.next_sibling is None,\ + "Bad next_sibling\nNODE: {}\nNEXT {}\nEXPECTED {}".format( + child, child.next_sibling, None + ) + idx += 1 + + child = descendant if descendant is not None else child + if child is None: + child = el + + if not _recursive_call and child is not None: + target = el + while True: + if target is None: + assert child.next_element is None, \ + "Bad next_element\nNODE: {}\nNEXT {}\nEXPECTED {}".format( + child, child.next_element, None + ) + break + elif target.next_sibling is not None: + assert child.next_element is target.next_sibling, \ + "Bad next_element\nNODE: {}\nNEXT {}\nEXPECTED {}".format( + child, child.next_element, target.next_sibling + ) + break + target = target.parent + + # We are done, so nothing to return + return None + else: + # Return the child to the recursive caller + return child + + +class TreeBuilderSmokeTest(object): + # Tests that are common to HTML and XML tree builders. + + def test_fuzzed_input(self): + # This test centralizes in one place the various fuzz tests + # for Beautiful Soup created by the oss-fuzz project. + + # These strings superficially resemble markup, but they + # generally can't be parsed into anything. The best we can + # hope for is that parsing these strings won't crash the + # parser. + # + # n.b. This markup is commented out because these fuzz tests + # _do_ crash the parser. However the crashes are due to bugs + # in html.parser, not Beautiful Soup -- otherwise I'd fix the + # bugs! + + bad_markup = [ + # https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=28873 + # https://github.com/guidovranken/python-library-fuzzers/blob/master/corp-html/519e5b4269a01185a0d5e76295251921da2f0700 + # https://bugs.python.org/issue37747 + # + #b'\n<![\xff\xfe\xfe\xcd\x00', + + #https://github.com/guidovranken/python-library-fuzzers/blob/master/corp-html/de32aa55785be29bbc72a1a8e06b00611fb3d9f8 + # https://bugs.python.org/issue34480 + # + #b'<![n\x00' + ] + for markup in bad_markup: + with warnings.catch_warnings(record=False): + soup = self.soup(markup) + + +class HTMLTreeBuilderSmokeTest(TreeBuilderSmokeTest): + + """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 test_empty_element_tags(self): + """Verify that all HTML4 and HTML5 empty element (aka void element) tags + are handled correctly. + """ + for name in [ + 'area', 'base', 'br', 'col', 'embed', 'hr', 'img', 'input', 'keygen', 'link', 'menuitem', 'meta', 'param', 'source', 'track', 'wbr', + 'spacer', 'frame' + ]: + soup = self.soup("") + new_tag = soup.new_tag(name) + assert new_tag.is_empty_element == True + + def test_special_string_containers(self): + soup = self.soup( + "<style>Some CSS</style><script>Some Javascript</script>" + ) + assert isinstance(soup.style.string, Stylesheet) + assert isinstance(soup.script.string, Script) + + soup = self.soup( + "<style><!--Some CSS--></style>" + ) + assert isinstance(soup.style.string, Stylesheet) + # The contents of the style tag resemble an HTML comment, but + # it's not treated as a comment. + assert soup.style.string == "<!--Some CSS-->" + assert isinstance(soup.style.string, Stylesheet) + + def test_pickle_and_unpickle_identity(self): + # Pickling a tree, then unpickling it, yields a tree identical + # to the original. + tree = self.soup("<a><b>foo</a>") + dumped = pickle.dumps(tree, 2) + loaded = pickle.loads(dumped) + assert loaded.__class__ == BeautifulSoup + assert loaded.decode() == tree.decode() + + 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] + assert doctype.__class__ == Doctype + assert doctype == doctype_fragment + assert soup.encode("utf8")[: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. + assert soup.p.contents[0] == 'foo' + + def _document_with_doctype(self, doctype_fragment, doctype_string="DOCTYPE"): + """Generate and parse a document with the given doctype.""" + doctype = '<!%s %s>' % (doctype_string, doctype_fragment) + markup = doctype + '\n<p>foo</p>' + soup = self.soup(markup) + return doctype.encode("utf8"), 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] + assert "" == doctype.strip() + + def test_mixed_case_doctype(self): + # A lowercase or mixed-case doctype becomes a Doctype. + for doctype_fragment in ("doctype", "DocType"): + doctype_str, soup = self._document_with_doctype( + "html", doctype_fragment + ) + + # Make sure a Doctype object was created and that the DOCTYPE + # is uppercase. + doctype = soup.contents[0] + assert doctype.__class__ == Doctype + assert doctype == "html" + assert soup.encode("utf8")[:len(doctype_str)] == b"<!DOCTYPE html>" + + # Make sure that the doctype was correctly associated with the + # parse tree and that the rest of the document parsed. + assert soup.p.contents[0] == 'foo' + + 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) + assert soup.encode("utf-8").replace(b"\n", b"") == markup.replace(b"\n", b"") + + def test_namespaced_html(self): + """When a namespaced XML document is parsed as HTML it should + be treated as HTML with weird tag names. + """ + markup = b"""<ns1:foo>content</ns1:foo><ns1:foo/><ns2:foo/>""" + soup = self.soup(markup) + assert 2 == len(soup.find_all("ns1:foo")) + + def test_processing_instruction(self): + # We test both Unicode and bytestring to verify that + # process_markup correctly sets processing_instruction_class + # even when the markup is already Unicode and there is no + # need to process anything. + markup = """<?PITarget PIContent?>""" + soup = self.soup(markup) + assert markup == soup.decode() + + markup = b"""<?PITarget PIContent?>""" + soup = self.soup(markup) + assert markup == soup.encode("utf8") + + 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/>") + assert not soup.p.is_empty_element + assert 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.assert_soup("<p>", "<p></p>") + self.assert_soup("<b>", "<b></b>") + + self.assert_soup("<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>") + assert soup.br.is_empty_element + assert str(soup.br) == "<br/>" + + def test_nested_formatting_elements(self): + self.assert_soup("<em><em></em></em>") + + def test_double_head(self): + html = '''<!DOCTYPE html> +<html> +<head> +<title>Ordinary HEAD element test</title> +</head> +<script type="text/javascript"> +alert("Help!"); +</script> +<body> +Hello, world! +</body> +</html> +''' + soup = self.soup(html) + assert "text/javascript" == soup.find('script')['type'] + + def test_comment(self): + # Comments are represented as Comment objects. + markup = "<p>foo<!--foobar-->baz</p>" + self.assert_soup(markup) + + soup = self.soup(markup) + comment = soup.find(text="foobar") + assert comment.__class__ == Comment + + # The comment is properly integrated into the tree. + foo = soup.find(text="foo") + assert comment == foo.next_element + baz = soup.find(text="baz") + assert comment == baz.previous_element + + def test_preserved_whitespace_in_pre_and_textarea(self): + """Whitespace must be preserved in <pre> and <textarea> tags, + even if that would mean not prettifying the markup. + """ + pre_markup = "<pre> </pre>" + textarea_markup = "<textarea> woo\nwoo </textarea>" + self.assert_soup(pre_markup) + self.assert_soup(textarea_markup) + + soup = self.soup(pre_markup) + assert soup.pre.prettify() == pre_markup + + soup = self.soup(textarea_markup) + assert soup.textarea.prettify() == textarea_markup + + soup = self.soup("<textarea></textarea>") + assert soup.textarea.prettify() == "<textarea></textarea>" + + def test_nested_inline_elements(self): + """Inline elements can be nested indefinitely.""" + b_tag = "<b>Inside a B tag</b>" + self.assert_soup(b_tag) + + nested_b_tag = "<p>A <i>nested <b>tag</b></i></p>" + self.assert_soup(nested_b_tag) + + double_nested_b_tag = "<p>A <a>doubly <i>nested <b>tag</b></i></a></p>" + self.assert_soup(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 + assert blockquote.p.b.string == 'Foo' + assert 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.assert_soup( + markup, + '<table id="1"><tr><td>Here\'s another table:' + '<table id="2"><tr><td>foo</td></tr></table>' + '</td></tr></table>') + + self.assert_soup( + "<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_multivalued_attribute_with_whitespace(self): + # Whitespace separating the values of a multi-valued attribute + # should be ignored. + + markup = '<div class=" foo bar "></a>' + soup = self.soup(markup) + assert ['foo', 'bar'] == soup.div['class'] + + # If you search by the literal name of the class it's like the whitespace + # wasn't there. + assert soup.div == soup.find('div', class_="foo bar") + + 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) + assert ["css"] == soup.div.div['class'] + + def test_multivalued_attribute_on_html(self): + # html5lib uses a different API to set the attributes ot the + # <html> tag. This has caused problems with multivalued + # attributes. + markup = '<html class="a b"></html>' + soup = self.soup(markup) + assert ["a", "b"] == soup.html['class'] + + def test_angle_brackets_in_attribute_values_are_escaped(self): + self.assert_soup('<a b="<a>"></a>', '<a b="<a>"></a>') + + def test_strings_resembling_character_entity_references(self): + # "&T" and "&p" look like incomplete character entities, but they are + # not. + self.assert_soup( + "<p>• AT&T is in the s&p 500</p>", + "<p>\u2022 AT&T is in the s&p 500</p>" + ) + + def test_apos_entity(self): + self.assert_soup( + "<p>Bob's Bar</p>", + "<p>Bob's Bar</p>", + ) + + def test_entities_in_foreign_document_encoding(self): + # “ and ” are invalid numeric entities referencing + # Windows-1252 characters. - references a character common + # to Windows-1252 and Unicode, and ☃ references a + # character only found in Unicode. + # + # All of these entities should be converted to Unicode + # characters. + markup = "<p>“Hello” -☃</p>" + soup = self.soup(markup) + assert "“Hello” -☃" == soup.p.string + + def test_entities_in_attributes_converted_to_unicode(self): + expect = '<p id="pi\N{LATIN SMALL LETTER N WITH TILDE}ata"></p>' + self.assert_soup('<p id="piñata"></p>', expect) + self.assert_soup('<p id="piñata"></p>', expect) + self.assert_soup('<p id="piñata"></p>', expect) + self.assert_soup('<p id="piñata"></p>', expect) + + def test_entities_in_text_converted_to_unicode(self): + expect = '<p>pi\N{LATIN SMALL LETTER N WITH TILDE}ata</p>' + self.assert_soup("<p>piñata</p>", expect) + self.assert_soup("<p>piñata</p>", expect) + self.assert_soup("<p>piñata</p>", expect) + self.assert_soup("<p>piñata</p>", expect) + + def test_quot_entity_converted_to_quotation_mark(self): + self.assert_soup("<p>I said "good day!"</p>", + '<p>I said "good day!"</p>') + + def test_out_of_range_entity(self): + expect = "\N{REPLACEMENT CHARACTER}" + self.assert_soup("�", expect) + self.assert_soup("�", expect) + self.assert_soup("�", 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>") + assert "p" == soup.h2.string.next_element.name + assert "p" == soup.p.name + self.assertConnectedness(soup) + + def test_empty_element_tags(self): + """Verify consistent handling of empty-element tags, + no matter how they come in through the markup. + """ + self.assert_soup('<br/><br/><br/>', "<br/><br/><br/>") + self.assert_soup('<br /><br /><br />', "<br/><br/><br/>") + + def test_head_tag_between_head_and_body(self): + "Prevent recurrence of a bug in the html5lib treebuilder." + content = """<html><head></head> + <link></link> + <body>foo</body> +</html> +""" + soup = self.soup(content) + assert soup.html.body is not None + self.assertConnectedness(soup) + + def test_multiple_copies_of_a_tag(self): + "Prevent recurrence of a bug in the html5lib treebuilder." + content = """<!DOCTYPE html> +<html> + <body> + <article id="a" > + <div><a href="1"></div> + <footer> + <a href="2"></a> + </footer> + </article> + </body> +</html> +""" + soup = self.soup(content) + self.assertConnectedness(soup.article) + + 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) + assert markup == soup.encode() + html = soup.html + assert 'http://www.w3.org/1999/xhtml' == soup.html['xmlns'] + assert 'http://www.w3.org/1998/Math/MathML' == soup.html['xmlns:mathml'] + assert '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) + assert ['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 = '<html><head><meta encoding="euc-jp"></head><body>Sacr\N{LATIN SMALL LETTER E WITH ACUTE} bleu!</body>' + soup = self.soup(markup) + assert '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) + assert soup.decode() == "<b>bold</b>" + + def test_single_quote_attribute_values_become_double_quotes(self): + self.assert_soup("<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.assert_soup(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.assert_soup( + soup.foo.decode(), + """<foo attr="Brawls happen at "Bob\'s Bar"">a</foo>""") + + def test_ampersand_in_attribute_value_gets_escaped(self): + self.assert_soup('<this is="really messed up & stuff"></this>', + '<this is="really messed up & stuff"></this>') + + self.assert_soup( + '<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.assert_soup('<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 = "<p><<sacr\N{LATIN SMALL LETTER E WITH ACUTE} bleu!>></p>" + self.assert_soup(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) + assert soup.p.string == "\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>") + assert soup.a.string == "\N{NO-BREAK SPACE}" * 2 + + def test_entities_converted_on_the_way_out(self): + text = "<p><<sacré bleu!>></p>" + expected = "<p><<sacr\N{LATIN SMALL LETTER E WITH ACUTE} bleu!>></p>".encode("utf-8") + soup = self.soup(text) + assert 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 = '<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! + assert 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. + assert soup.encode("utf-8") == unicode_html.encode("utf-8") + assert 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") + # Some tree builders call it iso8859-8, others call it iso-8859-9. + # That's not a difference we really care about. + assert soup.original_encoding in ('iso8859-8', 'iso-8859-8') + assert 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'] + assert 'text/html; charset=x-sjis' == content + + # But that value is actually a ContentMetaAttributeValue object. + assert isinstance(content, ContentMetaAttributeValue) + + # And it will take on a value that reflects its current + # encoding. + assert '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'] + assert 'x-sjis' == charset + + # But that value is actually a CharsetMetaAttributeValue object. + assert isinstance(charset, CharsetMetaAttributeValue) + + # And it will take on a value that reflects its current + # encoding. + assert 'utf8' == charset.encode("utf8") + + def test_python_specific_encodings_not_used_in_charset(self): + # You can encode an HTML document using a Python-specific + # encoding, but that encoding won't be mentioned _inside_ the + # resulting document. Instead, the document will appear to + # have no encoding. + for markup in [ + b'<meta charset="utf8"></head>' + b'<meta id="encoding" charset="utf-8" />' + ]: + soup = self.soup(markup) + for encoding in PYTHON_SPECIFIC_ENCODINGS: + if encoding in ( + 'idna', 'mbcs', 'oem', 'undefined', + 'string_escape', 'string-escape' + ): + # For one reason or another, these will raise an + # exception if we actually try to use them, so don't + # bother. + continue + encoded = soup.encode(encoding) + assert b'meta charset=""' in encoded + assert encoding.encode("ascii") not in encoded + + def test_tag_with_no_attributes_can_have_attributes_added(self): + data = self.soup("<a>text</a>") + data.a['foo'] = 'bar' + assert '<a foo="bar">text</a>' == data.a.decode() + + def test_closing_tag_with_no_opening_tag(self): + # Without BeautifulSoup.open_tag_counter, the </span> tag will + # cause _popToTag to be called over and over again as we look + # for a <span> tag that wasn't there. The result is that 'text2' + # will show up outside the body of the document. + soup = self.soup("<body><div><p>text1</p></span>text2</div></body>") + assert "<body><div><p>text1</p>text2</div></body>" == soup.body.decode() + + def test_worst_case(self): + """Test the worst case (currently) for linking issues.""" + + soup = self.soup(BAD_DOCUMENT) + self.linkage_validator(soup) + + +class XMLTreeBuilderSmokeTest(TreeBuilderSmokeTest): + + def test_pickle_and_unpickle_identity(self): + # Pickling a tree, then unpickling it, yields a tree identical + # to the original. + tree = self.soup("<a><b>foo</a>") + dumped = pickle.dumps(tree, 2) + loaded = pickle.loads(dumped) + assert loaded.__class__ == BeautifulSoup + assert loaded.decode() == tree.decode() + + def test_docstring_generated(self): + soup = self.soup("<root/>") + assert soup.encode() == b'<?xml version="1.0" encoding="utf-8"?>\n<root/>' + + def test_xml_declaration(self): + markup = b"""<?xml version="1.0" encoding="utf8"?>\n<foo/>""" + soup = self.soup(markup) + assert markup == soup.encode("utf8") + + def test_python_specific_encodings_not_used_in_xml_declaration(self): + # You can encode an XML document using a Python-specific + # encoding, but that encoding won't be mentioned _inside_ the + # resulting document. + markup = b"""<?xml version="1.0"?>\n<foo/>""" + soup = self.soup(markup) + for encoding in PYTHON_SPECIFIC_ENCODINGS: + if encoding in ( + 'idna', 'mbcs', 'oem', 'undefined', + 'string_escape', 'string-escape' + ): + # For one reason or another, these will raise an + # exception if we actually try to use them, so don't + # bother. + continue + encoded = soup.encode(encoding) + assert b'<?xml version="1.0"?>' in encoded + assert encoding.encode("ascii") not in encoded + + def test_processing_instruction(self): + markup = b"""<?xml version="1.0" encoding="utf8"?>\n<?PITarget PIContent?>""" + soup = self.soup(markup) + assert markup == soup.encode("utf8") + + 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) + assert soup.encode("utf-8") == markup + + def test_nested_namespaces(self): + doc = b"""<?xml version="1.0" encoding="utf-8"?> +<!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> +<parent xmlns="http://ns1/"> +<child xmlns="http://ns2/" xmlns:ns3="http://ns3/"> +<grandchild ns3:attr="value" xmlns="http://ns4/"/> +</child> +</parent>""" + soup = self.soup(doc) + assert doc == soup.encode() + + def test_formatter_processes_script_tag_for_xml_documents(self): + doc = """ + <script type="text/javascript"> + </script> +""" + soup = BeautifulSoup(doc, "lxml-xml") + # lxml would have stripped this while parsing, but we can add + # it later. + soup.script.string = 'console.log("< < hey > > ");' + encoded = soup.encode() + assert b"< < hey > >" in encoded + + def test_can_parse_unicode_document(self): + markup = '<?xml version="1.0" encoding="euc-jp"><root>Sacr\N{LATIN SMALL LETTER E WITH ACUTE} bleu!</root>' + soup = self.soup(markup) + assert '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) + assert str(soup.rss) == markup + + def test_docstring_includes_correct_encoding(self): + soup = self.soup("<root/>") + assert 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) + assert soup.encode("utf-8") == markup + + def test_tags_are_empty_element_if_and_only_if_they_are_empty(self): + self.assert_soup("<p>", "<p/>") + self.assert_soup("<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 + assert "http://example.com/" == root['xmlns:a'] + assert "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) + assert str(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) + assert str(soup.foo) == markup + + def test_namespaced_attributes_xml_namespace(self): + markup = '<foo xml:lang="fr">bar</foo>' + soup = self.soup(markup) + assert str(soup.foo) == markup + + def test_find_by_prefixed_name(self): + doc = """<?xml version="1.0" encoding="utf-8"?> +<Document xmlns="http://example.com/ns0" + xmlns:ns1="http://example.com/ns1" + xmlns:ns2="http://example.com/ns2" + <ns1:tag>foo</ns1:tag> + <ns1:tag>bar</ns1:tag> + <ns2:tag key="value">baz</ns2:tag> +</Document> +""" + soup = self.soup(doc) + + # There are three <tag> tags. + assert 3 == len(soup.find_all('tag')) + + # But two of them are ns1:tag and one of them is ns2:tag. + assert 2 == len(soup.find_all('ns1:tag')) + assert 1 == len(soup.find_all('ns2:tag')) + + assert 1, len(soup.find_all('ns2:tag', key='value')) + assert 3, len(soup.find_all(['ns1:tag', 'ns2:tag'])) + + def test_copy_tag_preserves_namespace(self): + xml = """<?xml version="1.0" encoding="UTF-8" standalone="yes"?> +<w:document xmlns:w="http://example.com/ns0"/>""" + + soup = self.soup(xml) + tag = soup.document + duplicate = copy.copy(tag) + + # The two tags have the same namespace prefix. + assert tag.prefix == duplicate.prefix + + def test_worst_case(self): + """Test the worst case (currently) for linking issues.""" + + soup = self.soup(BAD_DOCUMENT) + self.linkage_validator(soup) + + +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) + assert "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" + assert namespace == soup.svg.namespace + assert 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' + assert namespace == soup.math.namespace + assert 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) + assert isinstance(soup.contents[0], Comment) + assert soup.contents[0] == '?xml version="1.0" encoding="utf-8"?' + assert "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 |