asyncio.streams.StreamReader: Add 'at_eof()' method
diff --git a/Lib/asyncio/streams.py b/Lib/asyncio/streams.py
index 3da1d10..8fc2147 100644
--- a/Lib/asyncio/streams.py
+++ b/Lib/asyncio/streams.py
@@ -293,6 +293,10 @@
if not waiter.cancelled():
waiter.set_result(True)
+ def at_eof(self):
+ """Return True if the buffer is empty and 'feed_eof' was called."""
+ return self._eof and not self._buffer
+
def feed_data(self, data):
assert not self._eof, 'feed_data after feed_eof'
diff --git a/Lib/test/test_asyncio/test_streams.py b/Lib/test/test_asyncio/test_streams.py
index 83474a8..ee3fb45 100644
--- a/Lib/test/test_asyncio/test_streams.py
+++ b/Lib/test/test_asyncio/test_streams.py
@@ -204,6 +204,21 @@
# expected to be empty now.
self.assertEqual(b'', stream._buffer)
+ def test_at_eof(self):
+ stream = asyncio.StreamReader(loop=self.loop)
+ self.assertFalse(stream.at_eof())
+
+ stream.feed_data(b'some data\n')
+ self.assertFalse(stream.at_eof())
+
+ self.loop.run_until_complete(stream.readline())
+ self.assertFalse(stream.at_eof())
+
+ stream.feed_data(b'some data\n')
+ stream.feed_eof()
+ self.loop.run_until_complete(stream.readline())
+ self.assertTrue(stream.at_eof())
+
def test_readline_limit(self):
# Read one line. StreamReaders are fed with data after
# their 'readline' methods are called.