[Python-checkins] python/dist/src/Lib/test test_codecs.py, 1.15.2.3, 1.15.2.4

[doerwalter at users.sourceforge.net]

Update of /cvsroot/python/python/dist/src/Lib/test
In directory sc8-pr-cvs1.sourceforge.net:/tmp/cvs-serv15351/Lib/test

Modified Files:
      Tag: release24-maint
	test_codecs.py 
Log Message:
Backport checkin:
Fix for SF bug #1175396: readline() will now read one more character, if
the last character read is "\r" (and size is None, i.e. we're allowed to
call read() multiple times), so that we can return the correct line ending
(this additional character might be a "\n").

If the stream is temporarily exhausted, we might return the wrong line ending
(if the last character read is "\r" and the next one (after the byte stream
provides more data) is "\n", but at least the atcr member ensures that we
get the correct number of lines (i.e. this "\n" will not be treated as
another line ending).


Index: test_codecs.py
===================================================================
RCS file: /cvsroot/python/python/dist/src/Lib/test/test_codecs.py,v
retrieving revision 1.15.2.3
retrieving revision 1.15.2.4
diff -u -d -r1.15.2.3 -r1.15.2.4
--- test_codecs.py	14 Mar 2005 19:20:19 -0000	1.15.2.3
+++ test_codecs.py	4 Apr 2005 21:56:28 -0000	1.15.2.4
@@ -84,15 +84,88 @@
         # reader has to look ahead whether this is a lone \r or a \r\n
         for size in xrange(80):
             for lineend in u"\n \r\n \r \u2028".split():
-                s = size*u"a" + lineend + u"xxx\n"
-                self.assertEqual(
-                    getreader(s).readline(keepends=True),
-                    size*u"a" + lineend,
-                )
-                self.assertEqual(
-                    getreader(s).readline(keepends=False),
-                    size*u"a",
-                )
+                s = 10*(size*u"a" + lineend + u"xxx\n")
+                reader = getreader(s)
+                for i in xrange(10):
+                    self.assertEqual(
+                        reader.readline(keepends=True),
+                        size*u"a" + lineend,
+                    )
+                reader = getreader(s)
+                for i in xrange(10):
+                    self.assertEqual(
+                        reader.readline(keepends=False),
+                        size*u"a",
+                    )
+
+    def test_bug1175396(self):
+        s = [
+            '<%!--===================================================\r\n',
+            '    BLOG index page: show recent articles,\r\n',
+            '    today\'s articles, or articles of a specific date.\r\n',
+            '========================================================--%>\r\n',
+            '<%@inputencoding="ISO-8859-1"%>\r\n',
+            '<%@pagetemplate=TEMPLATE.y%>\r\n',
+            '<%@import=import frog.util, frog%>\r\n',
+            '<%@import=import frog.objects%>\r\n',
+            '<%@import=from frog.storageerrors import StorageError%>\r\n',
+            '<%\r\n',
+            '\r\n',
+            'import logging\r\n',
+            'log=logging.getLogger("Snakelets.logger")\r\n',
+            '\r\n',
+            '\r\n',
+            'user=self.SessionCtx.user\r\n',
+            'storageEngine=self.SessionCtx.storageEngine\r\n',
+            '\r\n',
+            '\r\n',
+            'def readArticlesFromDate(date, count=None):\r\n',
+            '    entryids=storageEngine.listBlogEntries(date)\r\n',
+            '    entryids.reverse() # descending\r\n',
+            '    if count:\r\n',
+            '        entryids=entryids[:count]\r\n',
+            '    try:\r\n',
+            '        return [ frog.objects.BlogEntry.load(storageEngine, date, Id) for Id in entryids ]\r\n',
+            '    except StorageError,x:\r\n',
+            '        log.error("Error loading articles: "+str(x))\r\n',
+            '        self.abort("cannot load articles")\r\n',
+            '\r\n',
+            'showdate=None\r\n',
+            '\r\n',
+            'arg=self.Request.getArg()\r\n',
+            'if arg=="today":\r\n',
+            '    #-------------------- TODAY\'S ARTICLES\r\n',
+            '    self.write("<h2>Today\'s articles</h2>")\r\n',
+            '    showdate = frog.util.isodatestr() \r\n',
+            '    entries = readArticlesFromDate(showdate)\r\n',
+            'elif arg=="active":\r\n',
+            '    #-------------------- ACTIVE ARTICLES redirect\r\n',
+            '    self.Yredirect("active.y")\r\n',
+            'elif arg=="login":\r\n',
+            '    #-------------------- LOGIN PAGE redirect\r\n',
+            '    self.Yredirect("login.y")\r\n',
+            'elif arg=="date":\r\n',
+            '    #-------------------- ARTICLES OF A SPECIFIC DATE\r\n',
+            '    showdate = self.Request.getParameter("date")\r\n',
+            '    self.write("<h2>Articles written on %s</h2>"% frog.util.mediumdatestr(showdate))\r\n',
+            '    entries = readArticlesFromDate(showdate)\r\n',
+            'else:\r\n',
+            '    #-------------------- RECENT ARTICLES\r\n',
+            '    self.write("<h2>Recent articles</h2>")\r\n',
+            '    dates=storageEngine.listBlogEntryDates()\r\n',
+            '    if dates:\r\n',
+            '        entries=[]\r\n',
+            '        SHOWAMOUNT=10\r\n',
+            '        for showdate in dates:\r\n',
+            '            entries.extend( readArticlesFromDate(showdate, SHOWAMOUNT-len(entries)) )\r\n',
+            '            if len(entries)>=SHOWAMOUNT:\r\n',
+            '                break\r\n',
+            '                \r\n',
+        ]
+        stream = StringIO.StringIO("".join(s).encode(self.encoding))
+        reader = codecs.getreader(self.encoding)(stream)
+        for (i, line) in enumerate(reader):
+            self.assertEqual(line, s[i])
 
     def test_readlinequeue(self):
         q = Queue()