Issue #18094: test_uuid no more reports skipped tests as passed.

Lib/test/test_uuid.py

-from unittest import TestCase
+import unittest
 from test import test_support
+import os
 import uuid
 
 def importable(name):
@@ -9,7 +10,7 @@ def importable(name):
     except:
         return False
 
-class TestUUID(TestCase):
+class TestUUID(unittest.TestCase):
     last_node = None
     source2node = {}
 
@@ -299,23 +300,21 @@ class TestUUID(TestCase):
         else:
             TestUUID.last_node = node
 
+    @unittest.skipUnless(os.name == 'posix', 'requires Posix')
     def test_ifconfig_getnode(self):
-        import sys
-        import os
-        if os.name == 'posix':
         node = uuid._ifconfig_getnode()
         if node is not None:
             self.check_node(node, 'ifconfig')
 
+    @unittest.skipUnless(os.name == 'nt', 'requires Windows')
     def test_ipconfig_getnode(self):
-        import os
-        if os.name == 'nt':
         node = uuid._ipconfig_getnode()
         if node is not None:
             self.check_node(node, 'ipconfig')
 
+    @unittest.skipUnless(importable('win32wnet'), 'requires win32wnet')
+    @unittest.skipUnless(importable('netbios'), 'requires netbios')
     def test_netbios_getnode(self):
-        if importable('win32wnet') and importable('netbios'):
         self.check_node(uuid._netbios_getnode(), 'netbios')
 
     def test_random_getnode(self):
@@ -324,22 +323,20 @@ class TestUUID(TestCase):
         self.assertTrue(node & 0x010000000000)
         self.assertTrue(node < (1L << 48))
 
+    @unittest.skipUnless(os.name == 'posix', 'requires Posix')
+    @unittest.skipUnless(importable('ctypes'), 'requires ctypes')
     def test_unixdll_getnode(self):
-        import sys
-        import os
-        if importable('ctypes') and os.name == 'posix':
         try: # Issues 1481, 3581: _uuid_generate_time() might be None.
             self.check_node(uuid._unixdll_getnode(), 'unixdll')
         except TypeError:
             pass
 
+    @unittest.skipUnless(os.name == 'nt', 'requires Windows')
+    @unittest.skipUnless(importable('ctypes'), 'requires ctypes')
     def test_windll_getnode(self):
-        import os
-        if importable('ctypes') and os.name == 'nt':
         self.check_node(uuid._windll_getnode(), 'windll')
 
     def test_getnode(self):
-        import sys
         node1 = uuid.getnode()
         self.check_node(node1, "getnode1")
 
@@ -349,13 +346,8 @@ class TestUUID(TestCase):
 
         self.assertEqual(node1, node2)
 
+    @unittest.skipUnless(importable('ctypes'), 'requires ctypes')
     def test_uuid1(self):
-        # uuid1 requires ctypes.
-        try:
-            import ctypes
-        except ImportError:
-            return
-
         equal = self.assertEqual
 
         # Make sure uuid1() generates UUIDs that are actually version 1.
@@ -408,13 +400,8 @@ class TestUUID(TestCase):
             equal(u, uuid.UUID(v))
             equal(str(u), v)
 
+    @unittest.skipUnless(importable('ctypes'), 'requires ctypes')
     def test_uuid4(self):
-        # uuid4 requires ctypes.
-        try:
-            import ctypes
-        except ImportError:
-            return
-
         equal = self.assertEqual
 
         # Make sure uuid4() generates UUIDs that are actually version 4.
@@ -446,12 +433,8 @@ class TestUUID(TestCase):
             equal(u, uuid.UUID(v))
             equal(str(u), v)
 
+    @unittest.skipUnless(os.name == 'posix', 'requires Posix')
     def testIssue8621(self):
-        import os
-        import sys
-        if os.name != 'posix':
-            return
-
         # On at least some versions of OSX uuid.uuid4 generates
         # the same sequence of UUIDs in the parent and any
         # children started using fork.

Misc/NEWS

@@ -58,6 +58,8 @@ IDLE
 Tests
 -----
 
+- Issue #18094: test_uuid no more reports skipped tests as passed.
+
 - Issue #11995: test_pydoc doesn't import all sys.path modules anymore.
 
 Documentation