/indra/lib/python/indra/util/iterators_test.py

"""\
@file iterators_test.py
@brief Test cases for iterators module.

$LicenseInfo:firstyear=2008&license=mit$

Copyright (c) 2008-2009, Linden Research, Inc.

Permission is hereby granted, free of charge, to any person obtaining a copy
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The above copyright notice and this permission notice shall be included in
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"""

import unittest

from indra.util.iterators import iter_chunks

class TestIterChunks(unittest.TestCase):
    """Unittests for iter_chunks"""
    def test_bad_agg_size(self):
        rows = [1,2,3,4]
        self.assertRaises(ValueError, iter_chunks, rows, 0)
        self.assertRaises(ValueError, iter_chunks, rows, -1)

        try:
            for i in iter_chunks(rows, 0):
                pass
        except ValueError:
            pass
        else:
            self.fail()
        
        try:
            result = list(iter_chunks(rows, 0))
        except ValueError:
            pass
        else:
            self.fail()
    def test_empty(self):
        rows = []
        result = list(iter_chunks(rows))
        self.assertEqual(result, [])
    def test_small(self):
        rows = [[1]]
        result = list(iter_chunks(rows, 2))
        self.assertEqual(result, [[[1]]])
    def test_size(self):
        rows = [[1],[2]]
        result = list(iter_chunks(rows, 2))
        self.assertEqual(result, [[[1],[2]]])
    def test_multi_agg(self):
        rows = [[1],[2],[3],[4],[5]]
        result = list(iter_chunks(rows, 2))
        self.assertEqual(result, [[[1],[2]],[[3],[4]],[[5]]])

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