tests: Add unit tests for the escaping of quote characters in attribute values

scour/scour.py

@@ -647,7 +647,7 @@ def removeUnusedDefs(doc, defElem, elemsToRemove=None):
     for elem in defElem.childNodes:
         # only look at it if an element and not referenced anywhere else
         if elem.nodeType == Node.ELEMENT_NODE and (elem.getAttribute('id') == '' or
-                                   elem.getAttribute('id') not in referencedIDs):
+                                                   elem.getAttribute('id') not in referencedIDs):
             # we only inspect the children of a group in a defs if the group
             # is not referenced anywhere else
             if elem.nodeName == 'g' and elem.namespaceURI == NS['SVG']:
@@ -3597,9 +3597,7 @@ def scourString(in_string, options=None):
 
 
 # used mostly by unit tests
-# input is a filename
-# returns the minidom doc representation of the SVG
-def scourXmlFile(filename, options=None):
+def scourXmlFileAndReturnString(filename, options=None):
     # sanitize options (take missing attributes from defaults, discard unknown attributes)
     options = sanitizeOptions(options)
     # we need to make sure infilename is set correctly (otherwise relative references in the SVG won't work)
@@ -3608,7 +3606,14 @@ def scourXmlFile(filename, options=None):
     # open the file and scour it
     with open(filename, "rb") as f:
         in_string = f.read()
-    out_string = scourString(in_string, options)
+
+    return scourString(in_string, options)
+
+
+# used mostly by unit tests
+# returns the minidom doc representation of the SVG
+def scourXmlFile(filename, options=None):
+    out_string = scourXmlFileAndReturnString(filename, options)
 
     # prepare the output xml.dom.minidom object
     doc = xml.dom.minidom.parseString(out_string.encode('utf-8'))

testscour.py

@@ -30,7 +30,12 @@ import unittest
 import six
 from six.moves import map, range
 
-from scour.scour import makeWellFormed, parse_args, scourString, scourXmlFile, start, run
+from scour.scour import (
+    makeWellFormed, parse_args, scourString,
+    scourXmlFileAndReturnString, scourXmlFile,
+    start, run
+)
+
 from scour.svg_regex import svg_parser
 from scour import __version__
 
@@ -1779,7 +1784,42 @@ class XmlEntities(unittest.TestCase):
 
     def runTest(self):
         self.assertEqual(makeWellFormed('<>&'), '&lt;&gt;&amp;',
-                         'Incorrectly translated XML entities')
+                         'Incorrectly translated unquoted XML entities')
+        self.assertEqual(makeWellFormed('<>&', "'"), '&lt;&gt;&amp;',
+                         'Incorrectly translated single-quoted XML entities')
+        self.assertEqual(makeWellFormed('<>&', '"'), '&lt;&gt;&amp;',
+                         'Incorrectly translated double-quoted XML entities')
+
+        self.assertEqual(makeWellFormed("'"), "'",
+                         'Incorrectly translated unquoted single quote')
+        self.assertEqual(makeWellFormed('"'), '"',
+                         'Incorrectly translated unquoted double quote')
+
+        self.assertEqual(makeWellFormed("'", '"'), "'",
+                         'Incorrectly translated double-quoted single quote')
+        self.assertEqual(makeWellFormed('"', "'"), '"',
+                         'Incorrectly translated single-quoted double quote')
+
+        self.assertEqual(makeWellFormed("'", "'"), '&apos;',
+                         'Incorrectly translated single-quoted single quote')
+        self.assertEqual(makeWellFormed('"', '"'), '&quot;',
+                         'Incorrectly translated double-quoted double quote')
+
+
+class HandleQuotesInAttributes(unittest.TestCase):
+
+    def runTest(self):
+        output = scourXmlFileAndReturnString('unittests/entities.svg')
+        self.assertTrue('a="\'"' in output,
+                        'Failed on attribute value with non-double quote')
+        self.assertTrue("b='\"'" in output,
+                        'Failed on attribute value with non-single quote')
+        self.assertTrue("c=\"''&quot;\"" in output,
+                        'Failed on attribute value with more single quotes than double quotes')
+        self.assertTrue('d=\'""&apos;\'' in output,
+                        'Failed on attribute value with more double quotes than single quotes')
+        self.assertTrue("e=\"''&quot;&quot;\"" in output,
+                        'Failed on attribute value with the same number of double quotes as single quotes')
 
 
 class DoNotStripCommentsOutsideOfRoot(unittest.TestCase):

unittests/entities.svg

@@ -0,0 +1,8 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<svg xmlns="http://www.w3.org/2000/svg"
+ a="'"
+ b='"'
+ c="''&quot;"
+ d='""&apos;'
+ e='&apos;&apos;""'
+/>