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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 19:02:46 +02:00
parent c02e1e65c4
commit bff5df0d1c
3 changed files with 35 additions and 4 deletions
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22
Lib/test/test_io.py
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@ -748,6 +748,20 @@ 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"
@ -931,7 +945,7 @@ 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):
@ -1194,7 +1208,7 @@ 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):
@ -1582,8 +1596,8 @@ class BufferedRandomTest(BufferedReaderTest, BufferedWriterTest):
f.flush()
self.assertEqual(raw.getvalue(), b'1b\n2def\n3\n')
class CBufferedRandomTest(CBufferedReaderTest, CBufferedWriterTest, BufferedRandomTest):
class CBufferedRandomTest(CBufferedReaderTest, CBufferedWriterTest,
BufferedRandomTest, SizeofTest):
tp = io.BufferedRandom
def test_constructor(self):