import unittest
from test import test_support

import os
import resource
import time

# This test is checking a few specific problem spots with the resource module.

class ResourceTest(unittest.TestCase):

    def test_args(self):
        self.assertRaises(TypeError, resource.getrlimit)
        self.assertRaises(TypeError, resource.getrlimit, 42, 42)
        self.assertRaises(TypeError, resource.setrlimit)
        self.assertRaises(TypeError, resource.setrlimit, 42, 42, 42)

    def test_fsize_ismax(self):
        try:
            (cur, max) = resource.getrlimit(resource.RLIMIT_FSIZE)
        except AttributeError:
            pass
        else:
            # RLIMIT_FSIZE should be RLIM_INFINITY, which will be a really big
            # number on a platform with large file support.  On these platforms,
            # we need to test that the get/setrlimit functions properly convert
            # the number to a C long long and that the conversion doesn't raise
            # an error.
            self.assertEqual(resource.RLIM_INFINITY, max)
            resource.setrlimit(resource.RLIMIT_FSIZE, (cur, max))

    def test_fsize_enforced(self):
        try:
            (cur, max) = resource.getrlimit(resource.RLIMIT_FSIZE)
        except AttributeError:
            pass
        else:
            # Check to see what happens when the RLIMIT_FSIZE is small.  Some
            # versions of Python were terminated by an uncaught SIGXFSZ, but
            # pythonrun.c has been fixed to ignore that exception.  If so, the
            # write() should return EFBIG when the limit is exceeded.

            # At least one platform has an unlimited RLIMIT_FSIZE and attempts
            # to change it raise ValueError instead.
            try:
                try:
                    resource.setrlimit(resource.RLIMIT_FSIZE, (1024, max))
                    limit_set = True
                except ValueError:
                    limit_set = False
                f = open(test_support.TESTFN, "wb")
                try:
                    f.write("X" * 1024)
                    try:
                        f.write("Y")
                        f.flush()
                        # On some systems (e.g., Ubuntu on hppa) the flush()
                        # doesn't always cause the exception, but the close()
                        # does eventually.  Try closing several times in
                        # an attempt to ensure the file is really synced and
                        # the exception raised.
                        for i in range(5):
                            time.sleep(.1)
                            f.flush()
                            f.close()
                    except IOError:
                        if not limit_set:
                            raise
                    if limit_set:
                        # Close will attempt to flush the byte we wrote
                        # Restore limit first to avoid getting a spurious error
                        resource.setrlimit(resource.RLIMIT_FSIZE, (cur, max))
                finally:
                    f.close()
            finally:
                if limit_set:
                    resource.setrlimit(resource.RLIMIT_FSIZE, (cur, max))
                test_support.unlink(test_support.TESTFN)

    def test_fsize_toobig(self):
        # Be sure that setrlimit is checking for really large values
        too_big = 10L**50
        try:
            (cur, max) = resource.getrlimit(resource.RLIMIT_FSIZE)
        except AttributeError:
            pass
        else:
            try:
                resource.setrlimit(resource.RLIMIT_FSIZE, (too_big, max))
            except (OverflowError, ValueError):
                pass
            try:
                resource.setrlimit(resource.RLIMIT_FSIZE, (max, too_big))
            except (OverflowError, ValueError):
                pass

    def test_getrusage(self):
        self.assertRaises(TypeError, resource.getrusage)
        self.assertRaises(TypeError, resource.getrusage, 42, 42)
        usageself = resource.getrusage(resource.RUSAGE_SELF)
        usagechildren = resource.getrusage(resource.RUSAGE_CHILDREN)
        # May not be available on all systems.
        try:
            usageboth = resource.getrusage(resource.RUSAGE_BOTH)
        except (ValueError, AttributeError):
            pass

def test_main(verbose=None):
    test_support.run_unittest(ResourceTest)

if __name__ == "__main__":
    test_main()

@@ -2365,20 +2365,21 @@
 y.  Try 
-clos
+flush
 ing seve
@@ -2644,46 +2644,8 @@
 h()%0A
-                            f.close()%0A
     

Update the comment and remove the close. If we close we can't flush anymore. We might still need to close after the for loop if flushing 6! times still doesn't cause the signal/exception.