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//usr/lib/python2.4/test/test_file.py
import sys import os from array import array from weakref import proxy from test.test_support import verify, TESTFN, TestFailed from UserList import UserList # verify weak references f = file(TESTFN, 'w') p = proxy(f) p.write('teststring') verify(f.tell(), p.tell()) f.close() f = None try: p.tell() except ReferenceError: pass else: raise TestFailed('file proxy still exists when the file is gone') # verify expected attributes exist f = file(TESTFN, 'w') softspace = f.softspace f.name # merely shouldn't blow up f.mode # ditto f.closed # ditto # verify softspace is writable f.softspace = softspace # merely shouldn't blow up # verify the others aren't for attr in 'name', 'mode', 'closed': try: setattr(f, attr, 'oops') except TypeError: pass else: raise TestFailed('expected TypeError setting file attr %r' % attr) f.close() # verify writelines with instance sequence l = UserList(['1', '2']) f = open(TESTFN, 'wb') f.writelines(l) f.close() f = open(TESTFN, 'rb') buf = f.read() f.close() verify(buf == '12') # verify readinto a = array('c', 'x'*10) f = open(TESTFN, 'rb') n = f.readinto(a) f.close() verify(buf == a.tostring()[:n]) # verify writelines with integers f = open(TESTFN, 'wb') try: f.writelines([1, 2, 3]) except TypeError: pass else: print "writelines accepted sequence of integers" f.close() # verify writelines with integers in UserList f = open(TESTFN, 'wb') l = UserList([1,2,3]) try: f.writelines(l) except TypeError: pass else: print "writelines accepted sequence of integers" f.close() # verify writelines with non-string object class NonString: pass f = open(TESTFN, 'wb') try: f.writelines([NonString(), NonString()]) except TypeError: pass else: print "writelines accepted sequence of non-string objects" f.close() # verify that we get a sensible error message for bad mode argument bad_mode = "qwerty" try: open(TESTFN, bad_mode) except IOError, msg: if msg[0] != 0: s = str(msg) if s.find(TESTFN) != -1 or s.find(bad_mode) == -1: print "bad error message for invalid mode: %s" % s # if msg[0] == 0, we're probably on Windows where there may be # no obvious way to discover why open() failed. else: print "no error for invalid mode: %s" % bad_mode f = open(TESTFN) if f.name != TESTFN: raise TestFailed, 'file.name should be "%s"' % TESTFN if f.isatty(): raise TestFailed, 'file.isatty() should be false' if f.closed: raise TestFailed, 'file.closed should be false' try: f.readinto("") except TypeError: pass else: raise TestFailed, 'file.readinto("") should raise a TypeError' f.close() if not f.closed: raise TestFailed, 'file.closed should be true' # make sure that explicitly setting the buffer size doesn't cause # misbehaviour especially with repeated close() calls for s in (-1, 0, 1, 512): try: f = open(TESTFN, 'w', s) f.write(str(s)) f.close() f.close() f = open(TESTFN, 'r', s) d = int(f.read()) f.close() f.close() except IOError, msg: raise TestFailed, 'error setting buffer size %d: %s' % (s, str(msg)) if d != s: raise TestFailed, 'readback failure using buffer size %d' methods = ['fileno', 'flush', 'isatty', 'next', 'read', 'readinto', 'readline', 'readlines', 'seek', 'tell', 'truncate', 'write', 'xreadlines', '__iter__'] if sys.platform.startswith('atheos'): methods.remove('truncate') for methodname in methods: method = getattr(f, methodname) try: method() except ValueError: pass else: raise TestFailed, 'file.%s() on a closed file should raise a ValueError' % methodname try: f.writelines([]) except ValueError: pass else: raise TestFailed, 'file.writelines([]) on a closed file should raise a ValueError' os.unlink(TESTFN) def bug801631(): # SF bug <http://www.python.org/sf/801631> # "file.truncate fault on windows" f = file(TESTFN, 'wb') f.write('12345678901') # 11 bytes f.close() f = file(TESTFN,'rb+') data = f.read(5) if data != '12345': raise TestFailed("Read on file opened for update failed %r" % data) if f.tell() != 5: raise TestFailed("File pos after read wrong %d" % f.tell()) f.truncate() if f.tell() != 5: raise TestFailed("File pos after ftruncate wrong %d" % f.tell()) f.close() size = os.path.getsize(TESTFN) if size != 5: raise TestFailed("File size after ftruncate wrong %d" % size) try: bug801631() finally: os.unlink(TESTFN)