Issue #8260: The read(), readline() and readlines() methods of
codecs.StreamReader returned incomplete data when were called after
readline() or read(size). Based on patch by Amaury Forgeot d'Arc.
diff --git a/Lib/test/test_codecs.py b/Lib/test/test_codecs.py
index c9a2515..d0f96af 100644
--- a/Lib/test/test_codecs.py
+++ b/Lib/test/test_codecs.py
@@ -124,6 +124,40 @@
size*u"a",
)
+ def test_mixed_readline_and_read(self):
+ lines = ["Humpty Dumpty sat on a wall,\n",
+ "Humpty Dumpty had a great fall.\r\n",
+ "All the king's horses and all the king's men\r",
+ "Couldn't put Humpty together again."]
+ data = ''.join(lines)
+ def getreader():
+ stream = StringIO.StringIO(data.encode(self.encoding))
+ return codecs.getreader(self.encoding)(stream)
+
+ # Issue #8260: Test readline() followed by read()
+ f = getreader()
+ self.assertEqual(f.readline(), lines[0])
+ self.assertEqual(f.read(), ''.join(lines[1:]))
+ self.assertEqual(f.read(), '')
+
+ # Issue #16636: Test readline() followed by readlines()
+ f = getreader()
+ self.assertEqual(f.readline(), lines[0])
+ self.assertEqual(f.readlines(), lines[1:])
+ self.assertEqual(f.read(), '')
+
+ # Test read() followed by read()
+ f = getreader()
+ self.assertEqual(f.read(size=40, chars=5), data[:5])
+ self.assertEqual(f.read(), data[5:])
+ self.assertEqual(f.read(), '')
+
+ # Issue #12446: Test read() followed by readlines()
+ f = getreader()
+ self.assertEqual(f.read(size=40, chars=5), data[:5])
+ self.assertEqual(f.readlines(), [lines[0][5:]] + lines[1:])
+ self.assertEqual(f.read(), '')
+
def test_bug1175396(self):
s = [
'<%!--===================================================\r\n',