| # Adapted from test_file.py by Daniel Stutzbach |
| |
| import sys |
| import os |
| import unittest |
| from array import array |
| from weakref import proxy |
| |
| from test.support import TESTFN, findfile, run_unittest |
| from collections import UserList |
| |
| import _fileio |
| |
| class AutoFileTests(unittest.TestCase): |
| # file tests for which a test file is automatically set up |
| |
| def setUp(self): |
| self.f = _fileio._FileIO(TESTFN, 'w') |
| |
| def tearDown(self): |
| if self.f: |
| self.f.close() |
| os.remove(TESTFN) |
| |
| def testWeakRefs(self): |
| # verify weak references |
| p = proxy(self.f) |
| p.write(bytes(range(10))) |
| self.assertEquals(self.f.tell(), p.tell()) |
| self.f.close() |
| self.f = None |
| self.assertRaises(ReferenceError, getattr, p, 'tell') |
| |
| def testSeekTell(self): |
| self.f.write(bytes(range(20))) |
| self.assertEquals(self.f.tell(), 20) |
| self.f.seek(0) |
| self.assertEquals(self.f.tell(), 0) |
| self.f.seek(10) |
| self.assertEquals(self.f.tell(), 10) |
| self.f.seek(5, 1) |
| self.assertEquals(self.f.tell(), 15) |
| self.f.seek(-5, 1) |
| self.assertEquals(self.f.tell(), 10) |
| self.f.seek(-5, 2) |
| self.assertEquals(self.f.tell(), 15) |
| |
| def testAttributes(self): |
| # verify expected attributes exist |
| f = self.f |
| |
| self.assertEquals(f.mode, "w") |
| self.assertEquals(f.closed, False) |
| |
| # verify the attributes are readonly |
| for attr in 'mode', 'closed': |
| self.assertRaises((AttributeError, TypeError), |
| setattr, f, attr, 'oops') |
| |
| def testReadinto(self): |
| # verify readinto |
| self.f.write(bytes([1, 2])) |
| self.f.close() |
| a = array('b', b'x'*10) |
| self.f = _fileio._FileIO(TESTFN, 'r') |
| n = self.f.readinto(a) |
| self.assertEquals(array('b', [1, 2]), a[:n]) |
| |
| def testRepr(self): |
| self.assertEquals(repr(self.f), |
| "_fileio._FileIO(%d, %s)" % (self.f.fileno(), |
| repr(self.f.mode))) |
| |
| def testErrors(self): |
| f = self.f |
| self.assert_(not f.isatty()) |
| self.assert_(not f.closed) |
| #self.assertEquals(f.name, TESTFN) |
| self.assertRaises(ValueError, f.read, 10) # Open for reading |
| f.close() |
| self.assert_(f.closed) |
| f = _fileio._FileIO(TESTFN, 'r') |
| self.assertRaises(TypeError, f.readinto, "") |
| self.assert_(not f.closed) |
| f.close() |
| self.assert_(f.closed) |
| |
| def testMethods(self): |
| methods = ['fileno', 'isatty', 'read', 'readinto', |
| 'seek', 'tell', 'truncate', 'write', 'seekable', |
| 'readable', 'writable'] |
| if sys.platform.startswith('atheos'): |
| methods.remove('truncate') |
| |
| self.f.close() |
| self.assert_(self.f.closed) |
| |
| for methodname in methods: |
| method = getattr(self.f, methodname) |
| # should raise on closed file |
| self.assertRaises(ValueError, method) |
| |
| |
| class OtherFileTests(unittest.TestCase): |
| |
| def testAbles(self): |
| try: |
| f = _fileio._FileIO(TESTFN, "w") |
| self.assertEquals(f.readable(), False) |
| self.assertEquals(f.writable(), True) |
| self.assertEquals(f.seekable(), True) |
| f.close() |
| |
| f = _fileio._FileIO(TESTFN, "r") |
| self.assertEquals(f.readable(), True) |
| self.assertEquals(f.writable(), False) |
| self.assertEquals(f.seekable(), True) |
| f.close() |
| |
| f = _fileio._FileIO(TESTFN, "a+") |
| self.assertEquals(f.readable(), True) |
| self.assertEquals(f.writable(), True) |
| self.assertEquals(f.seekable(), True) |
| self.assertEquals(f.isatty(), False) |
| f.close() |
| |
| if sys.platform != "win32": |
| try: |
| f = _fileio._FileIO("/dev/tty", "a") |
| except EnvironmentError: |
| # When run in a cron job there just aren't any |
| # ttys, so skip the test. This also handles other |
| # OS'es that don't support /dev/tty. |
| pass |
| else: |
| f = _fileio._FileIO("/dev/tty", "a") |
| self.assertEquals(f.readable(), False) |
| self.assertEquals(f.writable(), True) |
| if sys.platform != "darwin" and \ |
| not sys.platform.startswith('freebsd'): |
| # Somehow /dev/tty appears seekable on some BSDs |
| self.assertEquals(f.seekable(), False) |
| self.assertEquals(f.isatty(), True) |
| f.close() |
| finally: |
| os.unlink(TESTFN) |
| |
| def testModeStrings(self): |
| # check invalid mode strings |
| for mode in ("", "aU", "wU+", "rb", "rt"): |
| try: |
| f = _fileio._FileIO(TESTFN, mode) |
| except ValueError: |
| pass |
| else: |
| f.close() |
| self.fail('%r is an invalid file mode' % mode) |
| |
| def testUnicodeOpen(self): |
| # verify repr works for unicode too |
| f = _fileio._FileIO(str(TESTFN), "w") |
| f.close() |
| os.unlink(TESTFN) |
| |
| def testBadModeArgument(self): |
| # verify that we get a sensible error message for bad mode argument |
| bad_mode = "qwerty" |
| try: |
| f = _fileio._FileIO(TESTFN, bad_mode) |
| except ValueError as msg: |
| if msg.args[0] != 0: |
| s = str(msg) |
| if s.find(TESTFN) != -1 or s.find(bad_mode) == -1: |
| self.fail("bad error message for invalid mode: %s" % s) |
| # if msg.args[0] == 0, we're probably on Windows where there may be |
| # no obvious way to discover why open() failed. |
| else: |
| f.close() |
| self.fail("no error for invalid mode: %s" % bad_mode) |
| |
| def testTruncateOnWindows(self): |
| def bug801631(): |
| # SF bug <http://www.python.org/sf/801631> |
| # "file.truncate fault on windows" |
| f = _fileio._FileIO(TESTFN, 'w') |
| f.write(bytes(range(11))) |
| f.close() |
| |
| f = _fileio._FileIO(TESTFN,'r+') |
| data = f.read(5) |
| if data != bytes(range(5)): |
| self.fail("Read on file opened for update failed %r" % data) |
| if f.tell() != 5: |
| self.fail("File pos after read wrong %d" % f.tell()) |
| |
| f.truncate() |
| if f.tell() != 5: |
| self.fail("File pos after ftruncate wrong %d" % f.tell()) |
| |
| f.close() |
| size = os.path.getsize(TESTFN) |
| if size != 5: |
| self.fail("File size after ftruncate wrong %d" % size) |
| |
| try: |
| bug801631() |
| finally: |
| os.unlink(TESTFN) |
| |
| def testAppend(self): |
| try: |
| f = open(TESTFN, 'wb') |
| f.write(b'spam') |
| f.close() |
| f = open(TESTFN, 'ab') |
| f.write(b'eggs') |
| f.close() |
| f = open(TESTFN, 'rb') |
| d = f.read() |
| f.close() |
| self.assertEqual(d, b'spameggs') |
| finally: |
| try: |
| os.unlink(TESTFN) |
| except: |
| pass |
| |
| def test_main(): |
| # Historically, these tests have been sloppy about removing TESTFN. |
| # So get rid of it no matter what. |
| try: |
| run_unittest(AutoFileTests, OtherFileTests) |
| finally: |
| if os.path.exists(TESTFN): |
| os.unlink(TESTFN) |
| |
| if __name__ == '__main__': |
| test_main() |