import unittest
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import os
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from test.test_support import TESTFN, run_unittest, unlink, import_module
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gdbm = import_module('gdbm')
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filename = TESTFN
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class TestGdbm(unittest.TestCase):
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def setUp(self):
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self.g = None
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def tearDown(self):
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if self.g is not None:
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self.g.close()
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unlink(filename)
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def test_key_methods(self):
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self.g = gdbm.open(filename, 'c')
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self.assertEqual(self.g.keys(), [])
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self.g['a'] = 'b'
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self.g['12345678910'] = '019237410982340912840198242'
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key_set = set(self.g.keys())
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self.assertEqual(key_set, frozenset(['a', '12345678910']))
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self.assertTrue(self.g.has_key('a'))
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key = self.g.firstkey()
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while key:
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self.assertIn(key, key_set)
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key_set.remove(key)
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key = self.g.nextkey(key)
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self.assertRaises(KeyError, lambda: self.g['xxx'])
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def test_error_conditions(self):
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# Try to open a non-existent database.
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unlink(filename)
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self.assertRaises(gdbm.error, gdbm.open, filename, 'r')
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# Try to access a closed database.
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self.g = gdbm.open(filename, 'c')
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self.g.close()
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self.assertRaises(gdbm.error, lambda: self.g['a'])
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# try pass an invalid open flag
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self.assertRaises(gdbm.error, lambda: gdbm.open(filename, 'rx').close())
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def test_flags(self):
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# Test the flag parameter open() by trying all supported flag modes.
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all = set(gdbm.open_flags)
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# Test standard flags (presumably "crwn").
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modes = all - set('fsu')
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for mode in sorted(modes):
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self.g = gdbm.open(filename, mode)
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self.g.close()
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# Test additional flags (presumably "fsu").
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flags = all - set('crwn')
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for mode in modes:
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for flag in flags:
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self.g = gdbm.open(filename, mode + flag)
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self.g.close()
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def test_reorganize(self):
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self.g = gdbm.open(filename, 'c')
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size0 = os.path.getsize(filename)
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self.g['x'] = 'x' * 10000
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size1 = os.path.getsize(filename)
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self.assertTrue(size0 < size1)
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del self.g['x']
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# 'size' is supposed to be the same even after deleting an entry.
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self.assertEqual(os.path.getsize(filename), size1)
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self.g.reorganize()
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size2 = os.path.getsize(filename)
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self.assertTrue(size1 > size2 >= size0)
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def test_main():
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run_unittest(TestGdbm)
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if __name__ == '__main__':
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test_main()
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