1# Copyright (C) 2013 Google Inc. All rights reserved.
2#
3# Redistribution and use in source and binary forms, with or without
4# modification, are permitted provided that the following conditions are
5# met:
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7#     * Redistributions of source code must retain the above copyright
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9#     * Redistributions in binary form must reproduce the above
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15# this software without specific prior written permission.
16#
17# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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27# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
28
29import unittest
30
31import datastorefile
32
33from google.appengine.ext import db
34from google.appengine.ext import testbed
35
36
37class DataStoreFileTest(unittest.TestCase):
38    def setUp(self):
39        self.testbed = testbed.Testbed()
40        self.testbed.activate()
41        self.testbed.init_datastore_v3_stub()
42
43        self.test_file = datastorefile.DataStoreFile()
44
45    def tearDown(self):
46        self.testbed.deactivate()
47
48    def testSaveLoadDeleteData(self):
49        test_data = 'x' * datastorefile.MAX_ENTRY_LEN * 3
50
51        self.assertTrue(self.test_file.save_data(test_data))
52        self.assertEqual(test_data, self.test_file.data)
53
54        self.assertEqual(test_data, self.test_file.load_data())
55        self.assertEqual(test_data, self.test_file.data)
56
57        self.test_file.delete_data()
58        self.assertFalse(self.test_file.load_data())
59
60    def testSaveData(self):
61        self.assertFalse(self.test_file.save_data(None))
62
63        too_big_data = 'x' * (datastorefile.MAX_DATA_ENTRY_PER_FILE * datastorefile.MAX_ENTRY_LEN + 1)
64        self.assertFalse(self.test_file.save_data(too_big_data))
65
66        test_data = 'x' * datastorefile.MAX_ENTRY_LEN * 5
67        self.assertTrue(self.test_file.save_data(test_data))
68        nchunks = datastorefile.DataEntry.all().count()
69        nkeys = len(self.test_file.data_keys) + len(self.test_file.new_data_keys)
70        self.assertEqual(nkeys, nchunks)
71
72    def testSaveDataKeyReuse(self):
73        test_data = 'x' * datastorefile.MAX_ENTRY_LEN * 5
74        self.assertTrue(self.test_file.save_data(test_data))
75        nchunks = datastorefile.DataEntry.all().count()
76        nkeys = len(self.test_file.data_keys) + len(self.test_file.new_data_keys)
77        self.assertEqual(nkeys, nchunks)
78
79        smaller_data = 'x' * datastorefile.MAX_ENTRY_LEN * 3
80        self.assertTrue(self.test_file.save_data(smaller_data))
81        nchunks = datastorefile.DataEntry.all().count()
82        nkeys_before = len(self.test_file.data_keys) + len(self.test_file.new_data_keys)
83        self.assertEqual(nkeys_before, nchunks)
84
85        self.assertTrue(self.test_file.save_data(smaller_data))
86        nchunks = datastorefile.DataEntry.all().count()
87        nkeys_after = len(self.test_file.data_keys) + len(self.test_file.new_data_keys)
88        self.assertEqual(nkeys_after, nchunks)
89        self.assertNotEqual(nkeys_before, nkeys_after)
90
91    def testGetChunkIndices(self):
92        data_length = datastorefile.MAX_ENTRY_LEN * 3
93        chunk_indices = self.test_file._get_chunk_indices(data_length)
94        self.assertEqual(len(chunk_indices), 3)
95        self.assertNotEqual(chunk_indices[0], chunk_indices[-1])
96
97        data_length += 1
98        chunk_indices = self.test_file._get_chunk_indices(data_length)
99        self.assertEqual(len(chunk_indices), 4)
100
101
102if __name__ == '__main__':
103    unittest.main()
104