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Test that the file methods raise ValueError when called on a closed file. Test .isatty() Test name, closed attributes
92 lines
2.2 KiB
Python
92 lines
2.2 KiB
Python
import os
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from test_support import verify, TESTFN
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from UserList import UserList
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# verify writelines with instance sequence
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l = UserList(['1', '2'])
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f = open(TESTFN, 'wb')
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f.writelines(l)
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f.close()
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f = open(TESTFN, 'rb')
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buf = f.read()
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f.close()
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verify(buf == '12')
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# verify writelines with integers
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f = open(TESTFN, 'wb')
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try:
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f.writelines([1, 2, 3])
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except TypeError:
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pass
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else:
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print "writelines accepted sequence of integers"
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f.close()
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# verify writelines with integers in UserList
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f = open(TESTFN, 'wb')
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l = UserList([1,2,3])
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try:
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f.writelines(l)
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except TypeError:
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pass
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else:
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print "writelines accepted sequence of integers"
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f.close()
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# verify writelines with non-string object
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class NonString: pass
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f = open(TESTFN, 'wb')
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try:
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f.writelines([NonString(), NonString()])
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except TypeError:
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pass
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else:
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print "writelines accepted sequence of non-string objects"
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f.close()
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# verify that we get a sensible error message for bad mode argument
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bad_mode = "qwerty"
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try:
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open(TESTFN, bad_mode)
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except IOError, msg:
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if msg[0] != 0:
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s = str(msg)
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if s.find(TESTFN) != -1 or s.find(bad_mode) == -1:
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print "bad error message for invalid mode: %s" % s
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# if msg[0] == 0, we're probably on Windows where there may be
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# no obvious way to discover why open() failed.
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else:
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print "no error for invalid mode: %s" % bad_mode
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f = open(TESTFN)
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if f.name != TESTFN:
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raise TestError, 'file.name should be "%s"' % TESTFN
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if f.isatty():
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raise TestError, 'file.isatty() should be false'
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if f.closed:
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raise TestError, 'file.closed should be false'
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f.close()
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if not f.closed:
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raise TestError, 'file.closed should be true'
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for methodname in ['fileno', 'flush', 'isatty', 'read', 'readinto', 'readline', 'readlines', 'seek', 'tell', 'truncate', 'write', 'xreadlines' ]:
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method = getattr(f, methodname)
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try:
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method()
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except ValueError:
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pass
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else:
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raise TestError, 'file.%s() on a closed file should raise a ValueError' % methodname
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try:
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f.writelines([])
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except ValueError:
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pass
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else:
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raise TestError, 'file.writelines([]) on a closed file should raise a ValueError'
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os.unlink(TESTFN)
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