Issue #19925: Added tests for the spwd module. Original patch by Vajrasky Kok.

Lib/test/test_spwd.py

+import os
+import unittest
+from test import support
+
+spwd = support.import_module('spwd')
+
+
+@unittest.skipUnless(hasattr(os, 'geteuid') and os.geteuid() == 0,
+                     'root privileges required')
+class TestSpwdRoot(unittest.TestCase):
+
+    def test_getspall(self):
+        entries = spwd.getspall()
+        self.assertIsInstance(entries, list)
+        for entry in entries:
+            self.assertIsInstance(entry, spwd.struct_spwd)
+
+    def test_getspnam(self):
+        entries = spwd.getspall()
+        if not entries:
+            self.skipTest('empty shadow password database')
+        random_name = entries[0].sp_namp
+        entry = spwd.getspnam(random_name)
+        self.assertIsInstance(entry, spwd.struct_spwd)
+        self.assertEqual(entry.sp_namp, random_name)
+        self.assertEqual(entry.sp_namp, entry[0])
+        self.assertEqual(entry.sp_namp, entry.sp_nam)
+        self.assertIsInstance(entry.sp_pwdp, str)
+        self.assertEqual(entry.sp_pwdp, entry[1])
+        self.assertEqual(entry.sp_pwdp, entry.sp_pwd)
+        self.assertIsInstance(entry.sp_lstchg, int)
+        self.assertEqual(entry.sp_lstchg, entry[2])
+        self.assertIsInstance(entry.sp_min, int)
+        self.assertEqual(entry.sp_min, entry[3])
+        self.assertIsInstance(entry.sp_max, int)
+        self.assertEqual(entry.sp_max, entry[4])
+        self.assertIsInstance(entry.sp_warn, int)
+        self.assertEqual(entry.sp_warn, entry[5])
+        self.assertIsInstance(entry.sp_inact, int)
+        self.assertEqual(entry.sp_inact, entry[6])
+        self.assertIsInstance(entry.sp_expire, int)
+        self.assertEqual(entry.sp_expire, entry[7])
+        self.assertIsInstance(entry.sp_flag, int)
+        self.assertEqual(entry.sp_flag, entry[8])
+        with self.assertRaises(KeyError) as cx:
+            spwd.getspnam('invalid user name')
+        self.assertEqual(str(cx.exception), "'getspnam(): name not found'")
+        self.assertRaises(TypeError, spwd.getspnam)
+        self.assertRaises(TypeError, spwd.getspnam, 0)
+        self.assertRaises(TypeError, spwd.getspnam, random_name, 0)
+        try:
+            bytes_name = os.fsencode(random_name)
+        except UnicodeEncodeError:
+            pass
+        else:
+            self.assertRaises(TypeError, spwd.getspnam, bytes_name)
+
+
+if __name__ == "__main__":
+    unittest.main()

Misc/NEWS

@@ -30,6 +30,8 @@ Library
 Tests
 -----
 
+- Issue #19925: Added tests for the spwd module. Original patch by Vajrasky Kok.
+
 - Issue #21522: Added Tkinter tests for Listbox.itemconfigure(),
   PanedWindow.paneconfigure(), and Menu.entryconfigure().