import pprint import sgmllib import test_support import unittest class EventCollector(sgmllib.SGMLParser): def __init__(self): self.events = [] self.append = self.events.append sgmllib.SGMLParser.__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 unknown_starttag(self, tag, attrs): self.append(("starttag", tag, attrs)) def unknown_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, decl): self.append(("decl", decl)) def handle_entityref(self, data): self.append(("entityref", data)) def handle_pi(self, data): self.append(("pi", data)) class CDATAEventCollector(EventCollector): def start_cdata(self, attrs): self.append(("starttag", "cdata", attrs)) self.setliteral() class SGMLParserTestCase(unittest.TestCase): collector = EventCollector def check_events(self, source, expected_events): parser = self.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 check_parse_error(self, source): parser = EventCollector() try: parser.feed(source) parser.close() except sgmllib.SGMLParseError: pass else: self.fail("expected SGMLParseError for %r\nReceived:\n%s" % (source, pprint.pformat(parser.get_events()))) def test_underscore_in_attrname(self): # SF bug #436621 """Make sure attribute names with underscores are accepted""" self.check_events("", [ ("starttag", "a", [("has_under", "has_under"), ("_under", "_under")]), ]) def test_underscore_in_tagname(self): # SF bug #436621 """Make sure tag names with underscores are accepted""" self.check_events("", [ ("starttag", "has_under", []), ("endtag", "has_under"), ]) def test_quotes_in_unquoted_attrs(self): # SF bug #436621 """Be sure quotes in unquoted attributes are made part of the value""" self.check_events("", [ ("starttag", "a", [("href", "foo'bar\"baz")]), ]) def test_xhtml_empty_tag(self): """Handling of XHTML-style empty start tags""" self.check_events("
text", [ ("starttag", "br", []), ("data", "text"), ("starttag", "i", []), ("endtag", "i"), ]) def test_processing_instruction_only(self): self.check_events("", [ ("pi", "processing instruction"), ]) def test_bad_nesting(self): self.check_events("
", [ ("starttag", "a", []), ("starttag", "b", []), ("endtag", "a"), ("endtag", "b"), ]) def test_attr_syntax(self): output = [ ("starttag", "a", [("b", "v"), ("c", "v"), ("d", "v"), ("e", "e")]) ] self.check_events("""""", output) self.check_events("""""", output) self.check_events("""""", output) self.check_events("""""", output) def test_attr_values(self): self.check_events("""""", [("starttag", "a", [("b", "xxx\n\txxx"), ("c", "yyy\t\nyyy"), ("d", "\txyz\n")]) ]) self.check_events("""""", [ ("starttag", "a", [("b", ""), ("c", "")]), ]) def test_attr_funky_names(self): self.check_events("""""", [ ("starttag", "a", [("a.b", "v"), ("c:d", "v"), ("e-f", "v")]), ]) def test_weird_starttags(self): self.check_events("", [ ("starttag", "a", []), ("starttag", "a", []), ]) self.check_events("", [ ("endtag", "a"), ("starttag", "a", []), ]) def test_declaration_junk_chars(self): self.check_parse_error("") def test_get_starttag_text(self): s = """""" self.check_events(s, [ ("starttag", "foobar", [("one", "1"), ("two", "2")]), ]) def test_cdata_content(self): s = (" ¬-an-entity-ref; " " ") self.collector = CDATAEventCollector self.check_events(s, [ ("starttag", "cdata", []), ("data", " ¬-an-entity-ref; "), ("endtag", "cdata"), ("starttag", "notcdata", []), ("data", " "), ("comment", " comment "), ("data", " "), ("endtag", "notcdata"), ]) s = """ """ self.check_events(s, [ ("starttag", "cdata", []), ("data", " "), ("endtag", "cdata"), ]) # XXX These tests have been disabled by prefixing their names with # an underscore. The first two exercise outstanding bugs in the # sgmllib module, and the third exhibits questionable behavior # that needs to be carefully considered before changing it. def _test_starttag_end_boundary(self): self.check_events("""""", [("starttag", "a", [("b", "<")])]) self.check_events("""""", [("starttag", "a", [("b", ">")])]) def _test_buffer_artefacts(self): output = [("starttag", "a", [("b", "<")])] self.check_events([""], output) self.check_events([""], output) self.check_events([""], output) self.check_events([""], output) self.check_events([""], output) self.check_events([""], output) output = [("starttag", "a", [("b", ">")])] self.check_events([""], output) self.check_events([""], output) self.check_events([""], output) self.check_events(["'>"], output) self.check_events([""], output) self.check_events([""], output) def _test_starttag_junk_chars(self): self.check_parse_error("<") self.check_parse_error("<>") self.check_parse_error("") self.check_parse_error("") self.check_parse_error("") self.check_parse_error("'") self.check_parse_error("