"""Tests for HTMLParser.py.""" import HTMLParser import pprint import unittest from test import test_support class EventCollector(HTMLParser.HTMLParser): def __init__(self): self.events = [] self.append = self.events.append HTMLParser.HTMLParser.__init__(self) def get_events(self): # Normalize the list of events so that buffer artefacts don't # separate runs of contiguous characters. L = [] prevtype = None for event in self.events: type = event[0] if type == prevtype == "data": L[-1] = ("data", L[-1][1] + event[1]) else: L.append(event) prevtype = type self.events = L return L # structure markup def handle_starttag(self, tag, attrs): self.append(("starttag", tag, attrs)) def handle_startendtag(self, tag, attrs): self.append(("startendtag", tag, attrs)) def handle_endtag(self, tag): self.append(("endtag", tag)) # all other markup def handle_comment(self, data): self.append(("comment", data)) def handle_charref(self, data): self.append(("charref", data)) def handle_data(self, data): self.append(("data", data)) def handle_decl(self, data): self.append(("decl", data)) def handle_entityref(self, data): self.append(("entityref", data)) def handle_pi(self, data): self.append(("pi", data)) def unknown_decl(self, decl): self.append(("unknown decl", decl)) class EventCollectorExtra(EventCollector): def handle_starttag(self, tag, attrs): EventCollector.handle_starttag(self, tag, attrs) self.append(("starttag_text", self.get_starttag_text())) class TestCaseBase(unittest.TestCase): def _run_check(self, source, expected_events, collector=EventCollector): parser = collector() for s in source: parser.feed(s) parser.close() events = parser.get_events() if events != expected_events: self.fail("received events did not match expected events\n" "Expected:\n" + pprint.pformat(expected_events) + "\nReceived:\n" + pprint.pformat(events)) def _run_check_extra(self, source, events): self._run_check(source, events, EventCollectorExtra) def _parse_error(self, source): def parse(source=source): parser = HTMLParser.HTMLParser() parser.feed(source) parser.close() self.assertRaises(HTMLParser.HTMLParseError, parse) class HTMLParserTestCase(TestCaseBase): def test_processing_instruction_only(self): self._run_check("", [ ("pi", "processing instruction"), ]) self._run_check("", [ ("pi", "processing instruction ?"), ]) def test_simple_html(self): self._run_check(""" &entity;

", [ ("startendtag", "p", []), ]) self._run_check("

", [ ("starttag", "p", []), ("endtag", "p"), ]) self._run_check("

", [ ("starttag", "p", []), ("startendtag", "img", [("src", "foo")]), ("endtag", "p"), ]) def test_invalid_end_tags(self): # A collection of broken end tags.
is used as separator. # see http://www.w3.org/TR/html5/tokenization.html#end-tag-open-state # and #13993 html = ('

' '

') expected = [('starttag', 'br', []), # < is part of the name, / is discarded, p is an attribute ('endtag', 'label<'), ('starttag', 'br', []), # text and attributes are discarded ('endtag', 'div'), ('starttag', 'br', []), # comment because the first char after is ignored ('starttag', 'br', [])] self._run_check(html, expected) def test_broken_invalid_end_tag(self): # This is technically wrong (the "> shouldn't be included in the 'data') # but is probably not worth fixing it (in addition to all the cases of # the previous test, it would require a full attribute parsing). # see #13993 html = 'This confuses the parser' expected = [('starttag', 'b', []), ('data', 'This'), ('endtag', 'b'), ('data', '"> confuses the parser')] self._run_check(html, expected) def test_get_starttag_text(self): s = """""" self._run_check_extra(s, [ ("starttag", "foo:bar", [("one", "1"), ("two", "2")]), ("starttag_text", s)]) def test_cdata_content(self): contents = [ ' ¬-an-entity-ref;', "", '

', 'foo = "";', 'foo = "";', 'foo = <\n/script> ', '', ('\n//<\\/s\'+\'cript>\');\n//]]>'), '\n\n', 'foo = "";', u'', # these two should be invalid according to the HTML 5 spec, # section 8.1.2.2 #'foo = ', #'foo = ', ] elements = ['script', 'style', 'SCRIPT', 'STYLE', 'Script', 'Style'] for content in contents: for element in elements: element_lower = element.lower() s = u'<{element}>{content}'.format(element=element, content=content) self._run_check(s, [("starttag", element_lower, []), ("data", content), ("endtag", element_lower)]) def test_cdata_with_closing_tags(self): # see issue #13358 # make sure that HTMLParser calls handle_data only once for each CDATA. # The normal event collector normalizes the events in get_events, # so we override it to return the original list of events. class Collector(EventCollector): def get_events(self): return self.events content = """ ¬-an-entity-ref;

& '' !""" for element in [' script', 'script ', ' script ', '\nscript', 'script\n', '\nscript\n']: s = u'