Create the dbm package from PEP 3108. #2881.

1 files changed, 81 insertions, 0 deletions

diff --git a/Lib/test/test_dbm_gnu.py b/Lib/test/test_dbm_gnu.py
new file mode 100755
index 0000000..eddb970
--- /dev/null
+++ b/Lib/test/test_dbm_gnu.py
@@ -0,0 +1,81 @@
+import dbm.gnu as gdbm
+import unittest
+import os
+from test.support import verbose, TESTFN, run_unittest, unlink
+
+
+filename = TESTFN
+
+class TestGdbm(unittest.TestCase):
+    def setUp(self):
+        self.g = None
+
+    def tearDown(self):
+        if self.g is not None:
+            self.g.close()
+        unlink(filename)
+
+    def test_key_methods(self):
+        self.g = gdbm.open(filename, 'c')
+        self.assertEqual(self.g.keys(), [])
+        self.g['a'] = 'b'
+        self.g['12345678910'] = '019237410982340912840198242'
+        key_set = set(self.g.keys())
+        self.assertEqual(key_set, set([b'a', b'12345678910']))
+        self.assert_(b'a' in self.g)
+        key = self.g.firstkey()
+        while key:
+            self.assert_(key in key_set)
+            key_set.remove(key)
+            key = self.g.nextkey(key)
+        self.assertRaises(KeyError, lambda: self.g['xxx'])
+
+    def test_error_conditions(self):
+        # Try to open a non-existent database.
+        unlink(filename)
+        self.assertRaises(gdbm.error, gdbm.open, filename, 'r')
+        # Try to access a closed database.
+        self.g = gdbm.open(filename, 'c')
+        self.g.close()
+        self.assertRaises(gdbm.error, lambda: self.g['a'])
+        # try pass an invalid open flag
+        self.assertRaises(gdbm.error, lambda: gdbm.open(filename, 'rx').close())
+
+    def test_flags(self):
+        # Test the flag parameter open() by trying all supported flag modes.
+        all = set(gdbm.open_flags)
+        # Test standard flags (presumably "crwn").
+        modes = all - set('fsu')
+        for mode in modes:
+            self.g = gdbm.open(filename, mode)
+            self.g.close()
+
+        # Test additional flags (presumably "fsu").
+        flags = all - set('crwn')
+        for mode in modes:
+            for flag in flags:
+                self.g = gdbm.open(filename, mode + flag)
+                self.g.close()
+
+    def test_reorganize(self):
+        self.g = gdbm.open(filename, 'c')
+        size0 = os.path.getsize(filename)
+
+        self.g['x'] = 'x' * 10000
+        size1 = os.path.getsize(filename)
+        self.assert_(size0 < size1)
+
+        del self.g['x']
+        # 'size' is supposed to be the same even after deleting an entry.
+        self.assertEqual(os.path.getsize(filename), size1)
+
+        self.g.reorganize()
+        size2 = os.path.getsize(filename)
+        self.assert_(size1 > size2 >= size0)
+
+
+def test_main():
+    run_unittest(TestGdbm)
+
+if __name__ == '__main__':
+    test_main()