Issue #18266: test_largefile now works with unittest test discovery and
supports running only selected tests. Patch by Zachary Ware.
This commit is contained in:
Serhiy Storchaka
parent
880254e222
commit
c406a121f7
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@ -5,55 +5,50 @@ import os
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import stat
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import sys
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import unittest
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from test.support import run_unittest, TESTFN, verbose, requires, \
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unlink
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from test.support import TESTFN, requires, unlink
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import io # C implementation of io
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import _pyio as pyio # Python implementation of io
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try:
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import signal
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# The default handler for SIGXFSZ is to abort the process.
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# By ignoring it, system calls exceeding the file size resource
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# limit will raise IOError instead of crashing the interpreter.
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oldhandler = signal.signal(signal.SIGXFSZ, signal.SIG_IGN)
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except (ImportError, AttributeError):
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pass
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# create >2GB file (2GB = 2147483648 bytes)
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# size of file to create (>2GB; 2GB == 2147483648 bytes)
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size = 2500000000
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class LargeFileTest(unittest.TestCase):
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"""Test that each file function works as expected for a large
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(i.e. > 2GB, do we have to check > 4GB) files.
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NOTE: the order of execution of the test methods is important! test_seek
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must run first to create the test file. File cleanup must also be handled
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outside the test instances because of this.
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class LargeFileTest:
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"""Test that each file function works as expected for large
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(i.e. > 2GB) files.
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"""
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def test_seek(self):
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if verbose:
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print('create large file via seek (may be sparse file) ...')
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with self.open(TESTFN, 'wb') as f:
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def setUp(self):
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if os.path.exists(TESTFN):
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mode = 'r+b'
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else:
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mode = 'w+b'
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with self.open(TESTFN, mode) as f:
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current_size = os.fstat(f.fileno())[stat.ST_SIZE]
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if current_size == size+1:
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return
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if current_size == 0:
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f.write(b'z')
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f.seek(0)
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f.seek(size)
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f.write(b'a')
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f.flush()
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if verbose:
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print('check file size with os.fstat')
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self.assertEqual(os.fstat(f.fileno())[stat.ST_SIZE], size+1)
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@classmethod
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def tearDownClass(cls):
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with cls.open(TESTFN, 'wb'):
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pass
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if not os.stat(TESTFN)[stat.ST_SIZE] == 0:
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raise cls.failureException('File was not truncated by opening '
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'with mode "wb"')
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def test_osstat(self):
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if verbose:
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print('check file size with os.stat')
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self.assertEqual(os.stat(TESTFN)[stat.ST_SIZE], size+1)
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def test_seek_read(self):
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if verbose:
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print('play around with seek() and read() with the built largefile')
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with self.open(TESTFN, 'rb') as f:
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self.assertEqual(f.tell(), 0)
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self.assertEqual(f.read(1), b'z')
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@ -85,8 +80,6 @@ class LargeFileTest(unittest.TestCase):
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self.assertEqual(f.tell(), 1)
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def test_lseek(self):
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if verbose:
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print('play around with os.lseek() with the built largefile')
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with self.open(TESTFN, 'rb') as f:
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self.assertEqual(os.lseek(f.fileno(), 0, 0), 0)
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self.assertEqual(os.lseek(f.fileno(), 42, 0), 42)
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@ -100,13 +93,10 @@ class LargeFileTest(unittest.TestCase):
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self.assertEqual(f.read(1), b'a')
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def test_truncate(self):
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if verbose:
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print('try truncate')
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with self.open(TESTFN, 'r+b') as f:
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# this is already decided before start running the test suite
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# but we do it anyway for extra protection
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if not hasattr(f, 'truncate'):
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raise unittest.SkipTest("open().truncate() not available on this system")
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raise unittest.SkipTest("open().truncate() not available "
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"on this system")
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f.seek(0, 2)
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# else we've lost track of the true size
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self.assertEqual(f.tell(), size+1)
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@ -141,8 +131,16 @@ class LargeFileTest(unittest.TestCase):
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f.seek(pos)
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self.assertTrue(f.seekable())
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def setUpModule():
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try:
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import signal
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# The default handler for SIGXFSZ is to abort the process.
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# By ignoring it, system calls exceeding the file size resource
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# limit will raise OSError instead of crashing the interpreter.
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signal.signal(signal.SIGXFSZ, signal.SIG_IGN)
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except (ImportError, AttributeError):
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pass
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def test_main():
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# On Windows and Mac OSX this test comsumes large resources; It
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# takes a long time to build the >2GB file and takes >2GB of disk
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# space therefore the resource must be enabled to run this test.
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@ -158,35 +156,25 @@ def test_main():
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try:
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# 2**31 == 2147483648
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f.seek(2147483649)
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# Seeking is not enough of a test: you must write and
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# flush, too!
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# Seeking is not enough of a test: you must write and flush, too!
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f.write(b'x')
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f.flush()
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except (IOError, OverflowError):
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f.close()
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unlink(TESTFN)
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raise unittest.SkipTest("filesystem does not have largefile support")
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else:
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f.close()
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suite = unittest.TestSuite()
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for _open, prefix in [(io.open, 'C'), (pyio.open, 'Py')]:
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class TestCase(LargeFileTest):
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pass
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TestCase.open = staticmethod(_open)
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TestCase.__name__ = prefix + LargeFileTest.__name__
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suite.addTest(TestCase('test_seek'))
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suite.addTest(TestCase('test_osstat'))
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suite.addTest(TestCase('test_seek_read'))
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suite.addTest(TestCase('test_lseek'))
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with _open(TESTFN, 'wb') as f:
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if hasattr(f, 'truncate'):
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suite.addTest(TestCase('test_truncate'))
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suite.addTest(TestCase('test_seekable'))
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unlink(TESTFN)
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try:
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run_unittest(suite)
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raise unittest.SkipTest("filesystem does not have "
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"largefile support")
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finally:
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f.close()
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unlink(TESTFN)
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class CLargeFileTest(LargeFileTest, unittest.TestCase):
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open = staticmethod(io.open)
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class PyLargeFileTest(LargeFileTest, unittest.TestCase):
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open = staticmethod(pyio.open)
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def tearDownModule():
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unlink(TESTFN)
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if __name__ == '__main__':
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test_main()
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unittest.main()
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