# 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') and \ not sys.platform.startswith('sunos'): # 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 # "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()