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Issue #15487: Add a __sizeof__ implementation for buffered I/O objects.

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Patch by Serhiy Storchaka.
This commit is contained in:
Antoine Pitrou 2012-07-29 19:04:57 +02:00
commit a264384fe6
3 changed files with 34 additions and 3 deletions
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20
Lib/test/test_io.py
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@ -802,6 +802,20 @@ class CommonBufferedTests:
buf.raw = x
class SizeofTest:
@support.cpython_only
def test_sizeof(self):
bufsize1 = 4096
bufsize2 = 8192
rawio = self.MockRawIO()
bufio = self.tp(rawio, buffer_size=bufsize1)
size = sys.getsizeof(bufio) - bufsize1
rawio = self.MockRawIO()
bufio = self.tp(rawio, buffer_size=bufsize2)
self.assertEqual(sys.getsizeof(bufio), size + bufsize2)
class BufferedReaderTest(unittest.TestCase, CommonBufferedTests):
read_mode = "rb"
@ -999,7 +1013,7 @@ class BufferedReaderTest(unittest.TestCase, CommonBufferedTests):
"failed for {}: {} != 0".format(n, rawio._extraneous_reads))
class CBufferedReaderTest(BufferedReaderTest):
class CBufferedReaderTest(BufferedReaderTest, SizeofTest):
tp = io.BufferedReader
def test_constructor(self):
@ -1260,7 +1274,7 @@ class BufferedWriterTest(unittest.TestCase, CommonBufferedTests):
self.tp(self.MockRawIO(), 8, 12)
class CBufferedWriterTest(BufferedWriterTest):
class CBufferedWriterTest(BufferedWriterTest, SizeofTest):
tp = io.BufferedWriter
def test_constructor(self):
@ -1650,7 +1664,7 @@ class BufferedRandomTest(BufferedReaderTest, BufferedWriterTest):
# You can't construct a BufferedRandom over a non-seekable stream.
test_unseekable = None
class CBufferedRandomTest(BufferedRandomTest):
class CBufferedRandomTest(BufferedRandomTest, SizeofTest):
tp = io.BufferedRandom
def test_constructor(self):