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freddrakefreddrake
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Add a unit test for sgmllib (needs work, but has already caught problems).
Based on the test for the HTMLParser module.
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‎Lib/test/test_sgmllib.py‎

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import pprint
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import sgmllib
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import test_support
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import unittest
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class EventCollector(sgmllib.SGMLParser):
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def __init__(self):
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self.events = []
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self.append = self.events.append
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sgmllib.SGMLParser.__init__(self)
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def get_events(self):
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# Normalize the list of events so that buffer artefacts don't
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# separate runs of contiguous characters.
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L = []
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prevtype = None
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for event in self.events:
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type = event[0]
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if type == prevtype == "data":
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L[-1] = ("data", L[-1][1] + event[1])
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else:
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L.append(event)
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prevtype = type
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self.events = L
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return L
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# structure markup
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def unknown_starttag(self, tag, attrs):
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self.append(("starttag", tag, attrs))
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def unknown_endtag(self, tag):
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self.append(("endtag", tag))
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# all other markup
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def handle_comment(self, data):
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self.append(("comment", data))
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def handle_charref(self, data):
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self.append(("charref", data))
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def handle_data(self, data):
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self.append(("data", data))
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def handle_decl(self, decl):
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self.append(("decl", decl))
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def handle_entityref(self, data):
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self.append(("entityref", data))
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def handle_pi(self, data):
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self.append(("pi", data))
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class CDATAEventCollector(EventCollector):
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def start_cdata(self, attrs):
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self.append(("starttag", "cdata", attrs))
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self.setliteral()
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class SGMLParserTestCase(unittest.TestCase):
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collector = EventCollector
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def check_events(self, source, expected_events):
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parser = self.collector()
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for s in source:
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parser.feed(s)
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parser.close()
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events = parser.get_events()
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if events != expected_events:
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self.fail("received events did not match expected events\n"
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"Expected:\n" + pprint.pformat(expected_events) +
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"\nReceived:\n" + pprint.pformat(events))
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def check_parse_error(self, source):
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parser = EventCollector()
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try:
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parser.feed(source)
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parser.close()
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except sgmllib.SGMLParseError:
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pass
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else:
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self.fail("expected SGMLParseError for %r\nReceived:\n%s"
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% (source, pprint.pformat(parser.get_events())))
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def test_underscore_in_attrname(self):
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# SF bug #436621
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"""Make sure attribute names with underscores are accepted"""
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self.check_events("<a has_under _under>", [
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("starttag", "a", [("has_under", "has_under"),
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("_under", "_under")]),
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])
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def test_underscore_in_tagname(self):
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# SF bug #436621
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"""Make sure tag names with underscores are accepted"""
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self.check_events("<has_under></has_under>", [
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("starttag", "has_under", []),
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("endtag", "has_under"),
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])
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def test_quotes_in_unquoted_attrs(self):
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# SF bug #436621
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"""Be sure quotes in unquoted attributes are made part of the value"""
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self.check_events("<a href=foo'bar\"baz>", [
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("starttag", "a", [("href", "foo'bar\"baz")]),
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])
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def test_xhtml_empty_tag(self):
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"""Handling of XHTML-style empty start tags"""
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self.check_events("<br />text<i></i>", [
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("starttag", "br", []),
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("data", "text"),
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("starttag", "i", []),
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("endtag", "i"),
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])
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def test_processing_instruction_only(self):
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self.check_events("<?processing instruction>", [
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("pi", "processing instruction"),
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])
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def test_bad_nesting(self):
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self.check_events("<a><b></a></b>", [
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("starttag", "a", []),
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("starttag", "b", []),
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("endtag", "a"),
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("endtag", "b"),
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])
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def test_attr_syntax(self):
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output = [
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("starttag", "a", [("b", "v"), ("c", "v"), ("d", "v"), ("e", "e")])
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]
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self.check_events("""<a b='v' c="v" d=v e>""", output)
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self.check_events("""<a b = 'v' c = "v" d = v e>""", output)
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self.check_events("""<a\nb\n=\n'v'\nc\n=\n"v"\nd\n=\nv\ne>""", output)
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self.check_events("""<a\tb\t=\t'v'\tc\t=\t"v"\td\t=\tv\te>""", output)
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def test_attr_values(self):
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self.check_events("""<a b='xxx\n\txxx' c="yyy\t\nyyy" d='\txyz\n'>""",
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[("starttag", "a", [("b", "xxx\n\txxx"),
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("c", "yyy\t\nyyy"),
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("d", "\txyz\n")])
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])
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self.check_events("""<a b='' c="">""", [
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("starttag", "a", [("b", ""), ("c", "")]),
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])
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def test_attr_funky_names(self):
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self.check_events("""<a a.b='v' c:d=v e-f=v>""", [
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("starttag", "a", [("a.b", "v"), ("c:d", "v"), ("e-f", "v")]),
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])
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def test_weird_starttags(self):
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self.check_events("<a<a>", [
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("starttag", "a", []),
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("starttag", "a", []),
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])
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self.check_events("</a<a>", [
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("endtag", "a"),
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("starttag", "a", []),
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])
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def test_declaration_junk_chars(self):
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self.check_parse_error("<!DOCTYPE foo $ >")
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def test_get_starttag_text(self):
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s = """<foobar \n one="1"\ttwo=2 >"""
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self.check_events(s, [
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("starttag", "foobar", [("one", "1"), ("two", "2")]),
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])
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def test_cdata_content(self):
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s = ("<cdata> <!-- not a comment --> &not-an-entity-ref; </cdata>"
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"<notcdata> <!-- comment --> </notcdata>")
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self.collector = CDATAEventCollector
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self.check_events(s, [
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("starttag", "cdata", []),
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("data", " <!-- not a comment --> &not-an-entity-ref; "),
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("endtag", "cdata"),
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("starttag", "notcdata", []),
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("data", " "),
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("comment", " comment "),
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("data", " "),
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("endtag", "notcdata"),
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])
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s = """<cdata> <not a='start tag'> </cdata>"""
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self.check_events(s, [
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("starttag", "cdata", []),
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("data", " <not a='start tag'> "),
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("endtag", "cdata"),
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])
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# XXX These tests have been disabled by prefixing their names with
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# an underscore. The first two exercise outstanding bugs in the
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# sgmllib module, and the third exhibits questionable behavior
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# that needs to be carefully considered before changing it.
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def _test_starttag_end_boundary(self):
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self.check_events("""<a b='<'>""", [("starttag", "a", [("b", "<")])])
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self.check_events("""<a b='>'>""", [("starttag", "a", [("b", ">")])])
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def _test_buffer_artefacts(self):
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output = [("starttag", "a", [("b", "<")])]
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self.check_events(["<a b='<'>"], output)
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self.check_events(["<a ", "b='<'>"], output)
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self.check_events(["<a b", "='<'>"], output)
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self.check_events(["<a b=", "'<'>"], output)
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self.check_events(["<a b='<", "'>"], output)
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self.check_events(["<a b='<'", ">"], output)
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output = [("starttag", "a", [("b", ">")])]
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self.check_events(["<a b='>'>"], output)
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self.check_events(["<a ", "b='>'>"], output)
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self.check_events(["<a b", "='>'>"], output)
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self.check_events(["<a b=", "'>'>"], output)
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self.check_events(["<a b='>", "'>"], output)
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self.check_events(["<a b='>'", ">"], output)
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def _test_starttag_junk_chars(self):
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self.check_parse_error("<")
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self.check_parse_error("<>")
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self.check_parse_error("</$>")
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self.check_parse_error("</")
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self.check_parse_error("</a")
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self.check_parse_error("<$")
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self.check_parse_error("<$>")
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self.check_parse_error("<!")
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self.check_parse_error("<a $>")
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self.check_parse_error("<a")
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self.check_parse_error("<a foo='bar'")
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self.check_parse_error("<a foo='bar")
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self.check_parse_error("<a foo='>'")
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self.check_parse_error("<a foo='>")
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self.check_parse_error("<a foo=>")
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test_support.run_unittest(SGMLParserTestCase)

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