Create the dbm package from PEP 3108. #2881.

1 files changed, 185 insertions, 0 deletions

diff --git a/Lib/test/test_dbm_dumb.py b/Lib/test/test_dbm_dumb.py
new file mode 100644
index 0000000..9bdc240
--- /dev/null
+++ b/Lib/test/test_dbm_dumb.py
@@ -0,0 +1,185 @@
+#! /usr/bin/env python
+"""Test script for the dumbdbm module
+   Original by Roger E. Masse
+"""
+
+import io
+import os
+import unittest
+import dbm.dumb as dumbdbm
+from test import support
+
+_fname = support.TESTFN
+
+def _delete_files():
+    for ext in [".dir", ".dat", ".bak"]:
+        try:
+            os.unlink(_fname + ext)
+        except OSError:
+            pass
+
+class DumbDBMTestCase(unittest.TestCase):
+    _dict = {'0': b'',
+             'a': b'Python:',
+             'b': b'Programming',
+             'c': b'the',
+             'd': b'way',
+             'f': b'Guido',
+             'g': b'intended',
+             }
+
+    def __init__(self, *args):
+        unittest.TestCase.__init__(self, *args)
+
+    def test_dumbdbm_creation(self):
+        f = dumbdbm.open(_fname, 'c')
+        self.assertEqual(list(f.keys()), [])
+        for key in self._dict:
+            f[key.encode("ascii")] = self._dict[key]
+        self.read_helper(f)
+        f.close()
+
+    def test_dumbdbm_creation_mode(self):
+        # On platforms without chmod, don't do anything.
+        if not (hasattr(os, 'chmod') and hasattr(os, 'umask')):
+            return
+
+        try:
+            old_umask = os.umask(0o002)
+            f = dumbdbm.open(_fname, 'c', 0o637)
+            f.close()
+        finally:
+            os.umask(old_umask)
+
+        expected_mode = 0o635
+        if os.name != 'posix':
+            # Windows only supports setting the read-only attribute.
+            # This shouldn't fail, but doesn't work like Unix either.
+            expected_mode = 0o666
+
+        import stat
+        st = os.stat(_fname + '.dat')
+        self.assertEqual(stat.S_IMODE(st.st_mode), expected_mode)
+        st = os.stat(_fname + '.dir')
+        self.assertEqual(stat.S_IMODE(st.st_mode), expected_mode)
+
+    def test_close_twice(self):
+        f = dumbdbm.open(_fname)
+        f[b'a'] = b'b'
+        self.assertEqual(f[b'a'], b'b')
+        f.close()
+        f.close()
+
+    def test_dumbdbm_modification(self):
+        self.init_db()
+        f = dumbdbm.open(_fname, 'w')
+        self._dict['g'] = f[b'g'] = b"indented"
+        self.read_helper(f)
+        f.close()
+
+    def test_dumbdbm_read(self):
+        self.init_db()
+        f = dumbdbm.open(_fname, 'r')
+        self.read_helper(f)
+        f.close()
+
+    def test_dumbdbm_keys(self):
+        self.init_db()
+        f = dumbdbm.open(_fname)
+        keys = self.keys_helper(f)
+        f.close()
+
+    def test_write_contains(self):
+        f = dumbdbm.open(_fname)
+        f[b'1'] = b'hello'
+        self.assertTrue(b'1' in f)
+        f.close()
+
+    def test_write_write_read(self):
+        # test for bug #482460
+        f = dumbdbm.open(_fname)
+        f[b'1'] = b'hello'
+        f[b'1'] = b'hello2'
+        f.close()
+        f = dumbdbm.open(_fname)
+        self.assertEqual(f[b'1'], b'hello2')
+        f.close()
+
+    def test_line_endings(self):
+        # test for bug #1172763: dumbdbm would die if the line endings
+        # weren't what was expected.
+        f = dumbdbm.open(_fname)
+        f[b'1'] = b'hello'
+        f[b'2'] = b'hello2'
+        f.close()
+
+        # Mangle the file by changing the line separator to Windows or Unix
+        data = io.open(_fname + '.dir', 'rb').read()
+        if os.linesep == '\n':
+            data = data.replace(b'\n', b'\r\n')
+        else:
+            data = data.replace(b'\r\n', b'\n')
+        io.open(_fname + '.dir', 'wb').write(data)
+
+        f = dumbdbm.open(_fname)
+        self.assertEqual(f[b'1'], b'hello')
+        self.assertEqual(f[b'2'], b'hello2')
+
+
+    def read_helper(self, f):
+        keys = self.keys_helper(f)
+        for key in self._dict:
+            self.assertEqual(self._dict[key], f[key.encode("ascii")])
+
+    def init_db(self):
+        f = dumbdbm.open(_fname, 'w')
+        for k in self._dict:
+            f[k.encode("ascii")] = self._dict[k]
+        f.close()
+
+    def keys_helper(self, f):
+        keys = sorted(k.decode("ascii") for k in f.keys())
+        dkeys = sorted(self._dict.keys())
+        self.assertEqual(keys, dkeys)
+        return keys
+
+    # Perform randomized operations.  This doesn't make assumptions about
+    # what *might* fail.
+    def test_random(self):
+        import random
+        d = {}  # mirror the database
+        for dummy in range(5):
+            f = dumbdbm.open(_fname)
+            for dummy in range(100):
+                k = random.choice('abcdefghijklm')
+                if random.random() < 0.2:
+                    if k in d:
+                        del d[k]
+                        del f[k.encode("ascii")]
+                else:
+                    v = random.choice((b'a', b'b', b'c')) * random.randrange(10000)
+                    d[k] = v
+                    f[k.encode("ascii")] = v
+                    self.assertEqual(f[k.encode("ascii")], v)
+            f.close()
+
+            f = dumbdbm.open(_fname)
+            expected = sorted((k.encode("latin-1"), v) for k, v in d.items())
+            got = sorted(f.items())
+            self.assertEqual(expected, got)
+            f.close()
+
+    def tearDown(self):
+        _delete_files()
+
+    def setUp(self):
+        _delete_files()
+
+def test_main():
+    try:
+        support.run_unittest(DumbDBMTestCase)
+    finally:
+        _delete_files()
+
+if __name__ == "__main__":
+    test_main()