Add unit tests for the newlines property of IncrementalNewlineDecoder.
diff --git a/Lib/test/test_io.py b/Lib/test/test_io.py
index 87e871b..33b32e0 100644
--- a/Lib/test/test_io.py
+++ b/Lib/test/test_io.py
@@ -911,6 +911,22 @@
self.assertEquals(decoder.decode(b'\xe8\xa2\x88\r'), "\u8888")
self.assertEquals(decoder.decode(b'\n'), "\n")
+ decoder = codecs.getincrementaldecoder("utf-8")()
+ decoder = io.IncrementalNewlineDecoder(decoder, translate=True)
+ self.assertEquals(decoder.newlines, None)
+ decoder.decode(b"abc\n\r")
+ self.assertEquals(decoder.newlines, '\n')
+ decoder.decode(b"\nabc")
+ self.assertEquals(decoder.newlines, ('\n', '\r\n'))
+ decoder.decode(b"abc\r")
+ self.assertEquals(decoder.newlines, ('\n', '\r\n'))
+ decoder.decode(b"abc")
+ self.assertEquals(decoder.newlines, ('\r', '\n', '\r\n'))
+ decoder.decode(b"abc\r")
+ decoder.reset()
+ self.assertEquals(decoder.decode(b"abc"), "abc")
+ self.assertEquals(decoder.newlines, None)
+
# XXX Tests for open()
class MiscIOTest(unittest.TestCase):