test: Factored out normalization code into normalize.py.

1 files changed, 1 insertions, 139 deletions

diff --git a/test/spec_tests.py b/test/spec_tests.py
index 22af15f..e6ab9d5 100755
--- a/test/spec_tests.py
+++ b/test/spec_tests.py
@@ -4,12 +4,10 @@
 import sys
 from difflib import unified_diff
 import argparse
-from HTMLParser import HTMLParser, HTMLParseError
-from htmlentitydefs import name2codepoint
 import re
-import cgi
 import json
 from cmark import CMark
+from normalize import normalize_html
 
 if __name__ == "__main__":
     parser = argparse.ArgumentParser(description='Run cmark tests.')
@@ -35,142 +33,6 @@ if __name__ == "__main__":
 if not args.dump_tests:
     cmark = CMark(prog=args.program, library_dir=args.library_dir)
 
-# Normalization code, adapted from
-# https://github.com/karlcow/markdown-testsuite/
-significant_attrs = ["alt", "href", "src", "title"]
-whitespace_re = re.compile('/s+/')
-class MyHTMLParser(HTMLParser):
-    def __init__(self):
-        HTMLParser.__init__(self)
-        self.last = "starttag"
-        self.in_pre = False
-        self.output = u""
-        self.last_tag = ""
-    def handle_data(self, data):
-        after_tag = self.last == "endtag" or self.last == "starttag"
-        after_block_tag = after_tag and self.is_block_tag(self.last_tag)
-        if after_tag and self.last_tag == "br":
-            data = data.lstrip('\n')
-        data = whitespace_re.sub(' ', data)
-        if after_block_tag and not self.in_pre:
-            if self.last == "starttag":
-                data = data.lstrip()
-            elif self.last == "endtag":
-                data = data.strip()
-        self.output += data
-        self.last = "data"
-    def handle_endtag(self, tag):
-        if tag == "pre":
-            self.in_pre = False
-        if self.is_block_tag(tag):
-            self.output = self.output.rstrip()
-        self.output += "</" + tag + ">"
-        self.last_tag = tag
-        self.last = "endtag"
-    def handle_starttag(self, tag, attrs):
-        if tag == "pre":
-            self.in_pre = True
-        self.output += "<" + tag
-        # For now we don't strip out 'extra' attributes, because of
-        # raw HTML test cases.
-        # attrs = filter(lambda attr: attr[0] in significant_attrs, attrs)
-        if attrs:
-            attrs.sort()
-            for (k,v) in attrs:
-                self.output += " " + k
-                if v != None:
-                    self.output += ("=" + '"' + cgi.escape(v,quote=True) + '"')
-        self.output += ">"
-        self.last_tag = tag
-        self.last = "starttag"
-    def handle_startendtag(self, tag, attrs):
-        """Ignore closing tag for self-closing """
-        self.handle_starttag(tag, attrs)
-        self.last_tag = tag
-        self.last = "endtag"
-    def handle_comment(self, data):
-        self.output += '<!--' + data + '-->'
-        self.last = "comment"
-    def handle_decl(self, data):
-        self.output += '<!' + data + '>'
-        self.last = "decl"
-    def unknown_decl(self, data):
-        self.output += '<!' + data + '>'
-        self.last = "decl"
-    def handle_pi(self,data):
-        self.output += '<?' + data + '>'
-        self.last = "pi"
-    def handle_entityref(self, name):
-        try:
-            c = unichr(name2codepoint[name])
-        except KeyError:
-            c = None
-        self.output_char(c, '&' + name + ';')
-        self.last = "ref"
-    def handle_charref(self, name):
-        try:
-            if name.startswith("x"):
-                c = unichr(int(name[1:], 16))
-            else:
-                c = unichr(int(name))
-        except ValueError:
-                c = None
-        self.output_char(c, '&' + name + ';')
-        self.last = "ref"
-    # Helpers.
-    def output_char(self, c, fallback):
-        if c == u'<':
-            self.output += "&lt;"
-        elif c == u'>':
-            self.output += "&gt;"
-        elif c == u'&':
-            self.output += "&amp;"
-        elif c == u'"':
-            self.output += "&quot;"
-        elif c == None:
-            self.output += fallback
-        else:
-            self.output += c
-
-    def is_block_tag(self,tag):
-        return (tag in ['article', 'header', 'aside', 'hgroup', 'blockquote',
-            'hr', 'iframe', 'body', 'li', 'map', 'button', 'object', 'canvas',
-            'ol', 'caption', 'output', 'col', 'p', 'colgroup', 'pre', 'dd',
-            'progress', 'div', 'section', 'dl', 'table', 'td', 'dt',
-            'tbody', 'embed', 'textarea', 'fieldset', 'tfoot', 'figcaption',
-            'th', 'figure', 'thead', 'footer', 'tr', 'form', 'ul',
-            'h1', 'h2', 'h3', 'h4', 'h5', 'h6', 'video', 'script', 'style'])
-
-def normalize_html(html):
-    r"""
-    Return normalized form of HTML which ignores insignificant output
-    differences:
-
-    * Multiple inner whitespaces are collapsed to a single space (except
-      in pre tags).
-    * Outer whitespace (outside block-level tags) is removed.
-    * Self-closing tags are converted to open tags.
-    * Attributes are sorted and lowercased.
-    * References are converted to unicode, except that '<', '>', '&', and
-      '&' are rendered using entities.
-    """
-    html_chunk_re = re.compile("(\<!\[CDATA\[.*?\]\]\>|\<[^>]*\>|[^<]+)")
-    try:
-        parser = MyHTMLParser()
-        # We work around HTMLParser's limitations parsing CDATA
-        # by breaking the input into chunks and passing CDATA chunks
-        # through verbatim.
-        for chunk in re.finditer(html_chunk_re, html):
-            if chunk.group(0)[:8] == "<![CDATA":
-                parser.output += chunk.group(0)
-            else:
-                parser.feed(chunk.group(0).decode(encoding='UTF-8'))
-        parser.close()
-        return parser.output
-    except HTMLParseError as e:
-        sys.stderr.write("Normalization error: " + e.msg + "\n")
-        return html  # on error, return unnormalized HTML
-
 def print_test_header(headertext, example_number, start_line, end_line):
     print "Example %d (lines %d-%d) %s" % (example_number,start_line,end_line,headertext)