Convert test_nis to unittest.

Lib/test/output/test_nis

-test_nis
-nis.maps()

Lib/test/test_nis.py

-from test.test_support import verbose, TestFailed, TestSkipped
+from test.test_support import verbose, run_unittest
+import unittest
 import nis
 
-print 'nis.maps()'
-try:
+class NisTests(unittest.TestCase):
+    def test_maps(self):
+        try:
             maps = nis.maps()
-except nis.error, msg:
+        except nis.error, msg:
             # NIS is probably not active, so this test isn't useful
             if verbose:
-        raise TestFailed, msg
-    # only do this if running under the regression suite
-    raise TestSkipped, msg
-
-try:
+                self.fail("(failing because of verbose mode) %s" % msg)
+            return
+        try:
             # On some systems, this map is only accessible to the
             # super user
             maps.remove("passwd.adjunct.byname")
-except ValueError:
+        except ValueError:
             pass
 
-done = 0
-for nismap in maps:
-    if verbose:
-        print nismap
+        done = 0
+        for nismap in maps:
             mapping = nis.cat(nismap)
             for k, v in mapping.items():
-        if verbose:
-            print '    ', k, v
                 if not k:
                     continue
                 if nis.match(k, nismap) != v:
-            print "NIS match failed for key `%s' in map `%s'" % (k, nismap)
+                    self.fail("NIS match failed for key `%s' in map `%s'" % (k, nismap))
                 else:
                     # just test the one key, otherwise this test could take a
                     # very long time
@@ -37,3 +33,9 @@ for nismap in maps:
                     break
             if done:
                 break
+
+def test_main():
+    run_unittest(NisTests)
+
+if __name__ == '__main__':
+    test_main()