Tools/TestResultServer/model/datastorefile_test.py

# Copyright (C) 2013 Google Inc. All rights reserved.
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import unittest

import datastorefile

from google.appengine.ext import db
from google.appengine.ext import testbed


class DataStoreFileTest(unittest.TestCase):
    def setUp(self):
        self.testbed = testbed.Testbed()
        self.testbed.activate()
        self.testbed.init_datastore_v3_stub()

        self.test_file = datastorefile.DataStoreFile()

    def tearDown(self):
        self.testbed.deactivate()

    def testSaveLoadDeleteData(self):
        test_data = 'x' * datastorefile.MAX_ENTRY_LEN * 3

        self.assertTrue(self.test_file.save_data(test_data))
        self.assertEqual(test_data, self.test_file.data)

        self.assertEqual(test_data, self.test_file.load_data())
        self.assertEqual(test_data, self.test_file.data)

        self.test_file.delete_data()
        self.assertFalse(self.test_file.load_data())

    def testSaveData(self):
        self.assertFalse(self.test_file.save_data(None))

        too_big_data = 'x' * (datastorefile.MAX_DATA_ENTRY_PER_FILE * datastorefile.MAX_ENTRY_LEN + 1)
        self.assertFalse(self.test_file.save_data(too_big_data))

        test_data = 'x' * datastorefile.MAX_ENTRY_LEN * 5
        self.assertTrue(self.test_file.save_data(test_data))
        nchunks = datastorefile.DataEntry.all().count()
        nkeys = len(self.test_file.data_keys) + len(self.test_file.new_data_keys)
        self.assertEqual(nkeys, nchunks)

    def testSaveDataKeyReuse(self):
        test_data = 'x' * datastorefile.MAX_ENTRY_LEN * 5
        self.assertTrue(self.test_file.save_data(test_data))
        nchunks = datastorefile.DataEntry.all().count()
        nkeys = len(self.test_file.data_keys) + len(self.test_file.new_data_keys)
        self.assertEqual(nkeys, nchunks)

        smaller_data = 'x' * datastorefile.MAX_ENTRY_LEN * 3
        self.assertTrue(self.test_file.save_data(smaller_data))
        nchunks = datastorefile.DataEntry.all().count()
        nkeys_before = len(self.test_file.data_keys) + len(self.test_file.new_data_keys)
        self.assertEqual(nkeys_before, nchunks)

        self.assertTrue(self.test_file.save_data(smaller_data))
        nchunks = datastorefile.DataEntry.all().count()
        nkeys_after = len(self.test_file.data_keys) + len(self.test_file.new_data_keys)
        self.assertEqual(nkeys_after, nchunks)
        self.assertNotEqual(nkeys_before, nkeys_after)

    def testGetChunkIndices(self):
        data_length = datastorefile.MAX_ENTRY_LEN * 3
        chunk_indices = self.test_file._get_chunk_indices(data_length)
        self.assertEqual(len(chunk_indices), 3)
        self.assertNotEqual(chunk_indices[0], chunk_indices[-1])

        data_length += 1
        chunk_indices = self.test_file._get_chunk_indices(data_length)
        self.assertEqual(len(chunk_indices), 4)


if __name__ == '__main__':
    unittest.main()