#1291: copy test_resource.py from the 2.6 trunk, to fix a test failure.

The 2.6 version also converts to unittest, but it seems to work fine under 2.5.

Lib/test/test_resource.py

-import os
+import unittest
+from test import test_support
+
 import resource
+import time
 
-from test.test_support import TESTFN, unlink
+# This test is checking a few specific problem spots with the resource module.
 
-# This test is checking a few specific problem spots.  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.
+class ResourceTest(unittest.TestCase):
 
-try:
-    cur, max = resource.getrlimit(resource.RLIMIT_FSIZE)
-except AttributeError:
-    pass
-else:
-    print resource.RLIM_INFINITY == max
-    resource.setrlimit(resource.RLIMIT_FSIZE, (cur, max))
+    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)
 
-# Now 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.
+    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.
+            # 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 flushing 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()
+                    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)
 
-try:
-    try:
-        resource.setrlimit(resource.RLIMIT_FSIZE, (1024, max))
-        limit_set = 1
-    except ValueError:
-        limit_set = 0
-    f = open(TESTFN, "wb")
-    try:
-        f.write("X" * 1024)
+    def test_fsize_toobig(self):
+        # Be sure that setrlimit is checking for really large values
+        too_big = 10L**50
         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 flushing 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()
-        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))
-    unlink(TESTFN)
+            (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)
 
-# And be sure that setrlimit is checking for really large values
-too_big = 10L**50
-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
+if __name__ == "__main__":
+    test_main()