2 files changed, 28 insertions, 0 deletions
diff --git a/Lib/test/test_dbm.py b/Lib/test/test_dbm.py
index f21eebc..e3924d8 100644
--- a/Lib/test/test_dbm.py
+++ b/Lib/test/test_dbm.py
@@ -155,6 +155,21 @@ class AnyDBMTestCase:
             self.assertNotIn(b'xxx', d)
             self.assertRaises(KeyError, lambda: d[b'xxx'])
 
+    def test_clear(self):
+        with dbm.open(_fname, 'c') as d:
+            self.assertEqual(d.keys(), [])
+            a = [(b'a', b'b'), (b'12345678910', b'019237410982340912840198242')]
+            for k, v in a:
+                d[k] = v
+            for k, _ in a:
+                self.assertIn(k, d)
+            self.assertEqual(len(d), len(a))
+
+            d.clear()
+            self.assertEqual(len(d), 0)
+            for k, _ in a:
+                self.assertNotIn(k, d)
+
     def setUp(self):
         self.addCleanup(setattr, dbm, '_defaultmod', dbm._defaultmod)
         dbm._defaultmod = self.module
diff --git a/Lib/test/test_dbm_ndbm.py b/Lib/test/test_dbm_ndbm.py
index 8f37e3c..e0f31c9 100644
--- a/Lib/test/test_dbm_ndbm.py
+++ b/Lib/test/test_dbm_ndbm.py
@@ -147,6 +147,19 @@ class DbmTestCase(unittest.TestCase):
             db['a'] = 'b'
         self.assertRaises(dbm.ndbm.error, bool, db)
 
+    def test_clear(self):
+        kvs = [('foo', 'bar'), ('1234', '5678')]
+        with dbm.ndbm.open(self.filename, 'c') as db:
+            for k, v in kvs:
+                db[k] = v
+                self.assertIn(k, db)
+            self.assertEqual(len(db), len(kvs))
+
+            db.clear()
+            for k, v in kvs:
+                self.assertNotIn(k, db)
+            self.assertEqual(len(db), 0)
+
 
 if __name__ == '__main__':
     unittest.main()