Minor tweaks to packaging tests.

- Move a tearDown method right after setUp
- Use assertRaises instead of reinventing it
- Skip a test instead of commenting it out, as a reminder

Lib/packaging/tests/test_command_build_ext.py

@@ -37,6 +37,16 @@ class BuildExtTestCase(support.TempdirManager,
         site.USER_BASE = self.mkdtemp()
         build_ext.USER_BASE = site.USER_BASE
 
+    def tearDown(self):
+        # Get everything back to normal
+        unload('xx')
+        sys.path.remove(self.tmp_dir)
+        if sys.version > "2.6":
+            site.USER_BASE = self.old_user_base
+            build_ext.USER_BASE = self.old_user_base
+
+        super(BuildExtTestCase, self).tearDown()
+
     def _fixup_command(self, cmd):
         # When Python was build with --enable-shared, -L. is not good enough
         # to find the libpython<blah>.so.  This is because regrtest runs it
@@ -103,16 +113,6 @@ class BuildExtTestCase(support.TempdirManager,
         self.assertTrue(isinstance(xx.Null(), xx.Null))
         self.assertTrue(isinstance(xx.Str(), xx.Str))
 
-    def tearDown(self):
-        # Get everything back to normal
-        unload('xx')
-        sys.path.remove(self.tmp_dir)
-        if sys.version > "2.6":
-            site.USER_BASE = self.old_user_base
-            build_ext.USER_BASE = self.old_user_base
-
-        super(BuildExtTestCase, self).tearDown()
-
     def test_solaris_enable_shared(self):
         dist = Distribution({'name': 'xx'})
         cmd = build_ext(dist)

Lib/packaging/tests/test_pypi_dist.py

@@ -239,7 +239,6 @@ class TestReleasesList(unittest.TestCase):
 
     def test_prefer_final(self):
         # Can order the distributions using prefer_final
-
         fb10 = ReleaseInfo("FooBar", "1.0")  # final distribution
         fb11a = ReleaseInfo("FooBar", "1.1a1")  # alpha
         fb12a = ReleaseInfo("FooBar", "1.2a1")  # alpha
@@ -252,22 +251,23 @@ class TestReleasesList(unittest.TestCase):
         dists.sort_releases(prefer_final=False)
         self.assertEqual(fb12b, dists[0])
 
-#    def test_prefer_source(self):
-#        # Ordering support prefer_source
-#        fb_source = Dist("FooBar", "1.0", type="source")
-#        fb_binary = Dist("FooBar", "1.0", type="binary")
-#        fb2_binary = Dist("FooBar", "2.0", type="binary")
-#        dists = ReleasesList([fb_binary, fb_source])
-#
-#        dists.sort_distributions(prefer_source=True)
-#        self.assertEqual(fb_source, dists[0])
-#
-#        dists.sort_distributions(prefer_source=False)
-#        self.assertEqual(fb_binary, dists[0])
-#
-#        dists.append(fb2_binary)
-#        dists.sort_distributions(prefer_source=True)
-#        self.assertEqual(fb2_binary, dists[0])
+    @unittest.skip('method not implemented yet')
+    def test_prefer_source(self):
+        # Ordering supports prefer_source
+        fb_source = Dist("FooBar", "1.0", type="source")
+        fb_binary = Dist("FooBar", "1.0", type="binary")
+        fb2_binary = Dist("FooBar", "2.0", type="binary")
+        dists = ReleasesList([fb_binary, fb_source])
+
+        dists.sort_distributions(prefer_source=True)
+        self.assertEqual(fb_source, dists[0])
+
+        dists.sort_distributions(prefer_source=False)
+        self.assertEqual(fb_binary, dists[0])
+
+        dists.append(fb2_binary)
+        dists.sort_distributions(prefer_source=True)
+        self.assertEqual(fb2_binary, dists[0])
 
     def test_get_last(self):
         dists = ReleasesList('Foo')

Lib/packaging/tests/test_util.py

@@ -700,14 +700,8 @@ class GlobTestCase(GlobTestCaseBase):
             '{a**a,babar}',
             '{bob,b**z}',
         ]
-        msg = "%r is not supposed to be a valid pattern"
         for pattern in invalids:
-            try:
-                iglob(pattern)
-            except ValueError:
-                continue
-            else:
-                self.fail(msg % pattern)
+            self.assertRaises(ValueError, iglob, pattern)
 
 
 class EggInfoToDistInfoTestCase(support.TempdirManager,