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test_utils_datastructures.py
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# -*- coding: utf-8 -*-
#
# This file is part of Invenio.
# Copyright (C) 2013, 2014 CERN.
#
# Invenio is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License as
# published by the Free Software Foundation; either version 2 of the
# License, or (at your option) any later version.
#
# Invenio is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with Invenio; if not, write to the Free Software Foundation, Inc.,
# 59 Temple Place, Suite 330, Boston, MA 02111-1307, USA.
"""
Test unit for the miscutil/datastructures module.
"""
from operator import delitem, setitem
from werkzeug.datastructures import MultiDict
from invenio.utils.datastructures import LazyDict, LaziestDict, SmartDict, DotableDict, flatten_multidict
from invenio.testsuite import make_test_suite, run_test_suite, InvenioTestCase
class CallCounter(object):
"""Counts number of calls."""
def __init__(self, populate):
self.counter = 0
self.populate = populate
def __call__(self, *args, **kwargs):
self.counter = self.counter + 1
return self.populate(*args, **kwargs)
class TestLazyDictionaries(InvenioTestCase):
"""
Lazy dictionaries TestSuite.
"""
def test___setitem(self):
lazy_dict = LazyDict()
lazy_dict.__setitem__('foo', 'bar')
lazy_dict.__setitem__('foo2', 'bar2')
lazy_dict.__setitem__('foo3', 'bar3')
self.assertEqual(lazy_dict['foo'], 'bar')
self.assertEqual(lazy_dict['foo3'], 'bar3')
self.assertEqual(lazy_dict['foo2'], 'bar2')
def testa___delitem(self):
populate = CallCounter(lambda: {'foo': 'bar', 1: 11, 'empty': None})
lazy_dict = LazyDict(populate)
self.assertEqual(lazy_dict['foo'], 'bar')
del lazy_dict['foo']
self.assertRaises(KeyError, lambda: lazy_dict['foo'])
def test___delitem_on_empty_dict(self):
lazy_dict = LazyDict()
self.assertRaises(KeyError, delitem, lazy_dict, "foo")
def test___getattr_on_empty_dict(self):
lazy_dict = LazyDict()
self.assertRaises(AttributeError, lambda: lazy_dict.fooattr)
def test___iter(self):
populate = CallCounter(lambda: {'foo': 'bar', 1: 11, 'empty': None})
lazy_dict = LazyDict(populate)
iterator = iter(lazy_dict)
self.assertEqual(iterator.next(), 1)
self.assertEqual(iterator.next(), 'foo')
self.assertEqual(iterator.next(), 'empty')
self.assertRaises(StopIteration, iterator.next)
def test_iteritems(self):
populate = CallCounter(lambda: {'foo': 'bar', 1: 11, 'empty': None})
lazy_dict = LazyDict(populate)
iterator = lazy_dict.iteritems()
k, v = iterator.next()
self.assertEqual(k, 1)
self.assertEqual(v, 11)
k, v = iterator.next()
self.assertEqual(k, 'foo')
self.assertEqual(v, 'bar')
k, v = iterator.next()
self.assertEqual(k, 'empty')
self.assertEqual(v, None)
self.assertRaises(StopIteration, iterator.next)
def test_iterkeys(self):
populate = CallCounter(lambda: {'foo': 'bar', 1: 11, 'empty': None})
lazy_dict = LazyDict(populate)
iterator = lazy_dict.iterkeys()
self.assertEqual(iterator.next(), 1)
self.assertEqual(iterator.next(), 'foo')
self.assertEqual(iterator.next(), 'empty')
self.assertRaises(StopIteration, iterator.next)
def test_itervalues(self):
populate = CallCounter(lambda: {'foo': 'bar', 1: 11, 'empty': None})
lazy_dict = LazyDict(populate)
iterator = lazy_dict.itervalues()
self.assertEqual(iterator.next(), 11)
self.assertEqual(iterator.next(), 'bar')
self.assertEqual(iterator.next(), None)
self.assertRaises(StopIteration, iterator.next)
def test_lazy_dictionary(self):
"""Checks content of lazy dictionary and number of evaluations."""
populate = CallCounter(lambda: {'foo': 'bar', 1: 11, 'empty': None})
lazy_dict = LazyDict(populate)
self.assertEqual(populate.counter, 0)
self.assertEqual(lazy_dict['foo'], 'bar')
self.assertEqual(populate.counter, 1)
self.assertEqual(lazy_dict[1], 11)
self.assertEqual(populate.counter, 1)
self.assertEqual(lazy_dict['empty'], None)
self.assertEqual(populate.counter, 1)
# clear the cache
lazy_dict.expunge()
self.assertEqual(lazy_dict['foo'], 'bar')
self.assertEqual(populate.counter, 2)
del lazy_dict['foo']
self.assertEqual(populate.counter, 2)
assert 'foo' not in lazy_dict
def test_laziest_dictionary(self):
populate = CallCounter(
lambda k: {'foo': 'bar', 1: 11, 'empty': None}[k]
)
laziest_dict = LaziestDict(populate)
self.assertEqual(populate.counter, 0)
self.assertEqual(laziest_dict['foo'], 'bar')
self.assertEqual(laziest_dict.keys(), ['foo'])
self.assertEqual(populate.counter, 1)
self.assertEqual(laziest_dict[1], 11)
self.assertEqual(laziest_dict.keys(), [1, 'foo'])
self.assertEqual(populate.counter, 2)
self.assertEqual(laziest_dict['empty'], None)
self.assertEqual(laziest_dict.keys(), [1, 'foo', 'empty'])
self.assertEqual(populate.counter, 3)
# cached result will not cause new call
self.assertEqual(laziest_dict['foo'], 'bar')
self.assertEqual(populate.counter, 3)
# not existing key cause new call (even multiple times)
self.assertEqual(laziest_dict.get('does not exists', -1), -1)
self.assertEqual(populate.counter, 4)
self.assertEqual(laziest_dict.get('does not exists'), None)
self.assertEqual(populate.counter, 5)
def test_laziest__contains(self):
populate = CallCounter(
lambda k: {'foo': 'bar', 1: 11, 'empty': None}[k]
)
laziest_dict = LaziestDict(populate)
self.assertTrue('foo' in laziest_dict)
self.assertFalse('foo2' in laziest_dict)
laziest_dict2 = LaziestDict()
self.assertFalse('foo2' in laziest_dict2)
class TestSmartDict(InvenioTestCase):
"""
Smart Dictionary TestSuite
"""
def test_smart_dict(self):
d = SmartDict()
d['foo'] = {'a': 'world', 'b': 'hello'}
d['a'] = [{'b': 1}, {'b': 2}, {'b': 3}]
self.assertEqual(d.keys(), ['a', 'foo'])
self.assertTrue('foo.a' in d)
del d['foo']
self.assertEqual(d.keys(), ['a'])
self.assertEqual(d['a'], [{'b': 1}, {'b': 2}, {'b': 3}])
self.assertEqual(d['a[0]'], {'b': 1})
self.assertEqual(d['a.b'], [1, 2, 3])
self.assertEqual(d['a[1:]'], [{'b': 2}, {'b': 3}])
d.set('a', {'b': 4}, extend=True)
self.assertEqual(d['a'], [{'b': 1}, {'b': 2}, {'b': 3}, {'b': 4}])
d.set('a', [{'b': 1}, {'b': 2}, {'b': 3}], extend=False)
self.assertEqual(d['a'], [{'b': 1}, {'b': 2}, {'b': 3}])
self.assertEqual(d.get('does not exists'), None)
d = SmartDict()
d.set('a.b.c[n]', 'foo', True)
self.assertEqual(d['a.b.c'], ['foo'])
d.set('a.b.c[n]', 'bar', True)
self.assertEqual(d['a.b.c'], ['foo', 'bar'])
d.set('a.b.c', ['foo'], False)
self.assertEqual(d['a.b.c'], ['foo'])
def test_smart__contains(self):
d = SmartDict()
d['foo'] = {'a': 'world', 'b': 'hello'}
d['a'] = [{'b': 1}, {'b': 2}, {'b': 3}]
self.assertFalse('.' in d)
self.assertFalse('[' in d)
def test_smart_insert_special_chars(self):
d = SmartDict({'a': 'world', 'b': 'hello'})
self.assertRaises(KeyError, setitem, d, ".", "dot")
self.assertRaises(KeyError, setitem, d, "[", "open bracket")
self.assertRaises(KeyError, setitem, d, "]", "close bracket")
def test_smart_iter(self):
d = SmartDict()
d['foo'] = {'a': 'world', 'b': 'hello'}
d['a'] = [{'b': 1}, {'b': 2}, {'b': 3}]
iterator = iter(d)
self.assertEqual(iterator.next(), 'a')
self.assertEqual(iterator.next(), 'foo')
self.assertRaises(StopIteration, iterator.next)
def test_smart_items(self):
d = SmartDict()
d['foo'] = {'a': 'world', 'b': 'hello'}
d['a'] = [{'b': 1}, {'b': 2}, {'b': 3}]
d['c.d'] = [{'e': 4}, {'f': 5}]
self.assertTrue(d.items(), [('a', [{'b': 1}, {'b': 2}, {'b': 3}]),
('c', {'d': [{'e': 4}, {'f': 5}]}),
('foo', {'a': 'world', 'b': 'hello'})])
def test_smart_iteritems(self):
d = SmartDict()
d['foo'] = {'a': 'world', 'b': 'hello'}
d['c.d'] = [{'e': 4}, {'f': 5}]
d['a'] = [{'b': 1}, {'b': 2}, {'b': 3}]
iterator = d.iteritems()
k, v = iterator.next()
self.assertEqual(k, 'a')
self.assertEqual(v, [{'b': 1}, {'b': 2}, {'b': 3}])
k, v = iterator.next()
self.assertEqual(k, 'c')
self.assertEqual(v, {'d': [{'e': 4}, {'f': 5}]})
k, v = iterator.next()
self.assertEqual(k, 'foo')
self.assertEqual(v, {'a': 'world', 'b': 'hello'})
self.assertRaises(StopIteration, iterator.next)
def test_smart_iterkeys(self):
d = SmartDict()
d['foo'] = {'a': 'world', 'b': 'hello'}
d['c.d'] = [{'e': 4}, {'f': 5}]
d['a'] = [{'b': 1}, {'b': 2}, {'b': 3}]
iterator = d.iterkeys()
self.assertEqual(iterator.next(), 'a')
self.assertEqual(iterator.next(), 'c')
self.assertEqual(iterator.next(), 'foo')
self.assertRaises(StopIteration, iterator.next)
def test_smart_itervalues(self):
d = SmartDict()
d['foo'] = {'a': 'world', 'b': 'hello'}
d['c.d'] = [{'e': 4}, {'f': 5}]
d['a'] = [{'b': 1}, {'b': 2}, {'b': 3}]
iterator = d.itervalues()
self.assertEqual(iterator.next(), [{'b': 1}, {'b': 2}, {'b': 3}])
self.assertEqual(iterator.next(), {'d': [{'e': 4}, {'f': 5}]})
self.assertEqual(iterator.next(), {'a': 'world', 'b': 'hello'})
self.assertRaises(StopIteration, iterator.next)
def test_smart_has_key(self):
d = SmartDict()
d['foo'] = {'a': 'world', 'b': 'hello'}
d['c.d'] = [{'e': 4}, {'f': 5}]
d['a'] = [{'b': 1}, {'b': 2}, {'b': 3}]
self.assertTrue('c' in d)
self.assertFalse('v' in d)
self.assertTrue('c.d' in d)
self.assertTrue('foo.b' in d)
def test_smart_repr(self):
d = SmartDict()
d['foo'] = {'a': 'world', 'b': 'hello'}
d['c.d'] = [{'e': 4}, {'f': 5}]
d['a'] = [{'b': 1}, {'b': 2}, {'b': 3}]
self.assertEqual(repr(d), "{'a': [{'b': 1}, {'b': 2}, {'b': 3}], " +
"'c': {'d': [{'e': 4}, {'f': 5}]}, " +
"'foo': {'a': 'world', 'b': 'hello'}}")
del d['c']
self.assertEqual(repr(d), "{'a': [{'b': 1}, {'b': 2}, {'b': 3}], " +
"'foo': {'a': 'world', 'b': 'hello'}}")
def test_smart_update(self):
d = SmartDict()
d2 = SmartDict()
d['foo'] = {'a': 'world', 'b': 'hello'}
d['c.d'] = [{'e': 4}, {'f': 5}]
d['a'] = [{'b': 1}, {'b': 2}, {'b': 3}]
d2['qwerty'] = {'t': 'u', 'i': 'o'}
d2['qwe.rty'] = [{'n': 34}, {'x': 3}]
d.update(d2)
d3 = SmartDict({'a': [{'b': 1}, {'b': 2}, {'b': 3}],
'c': {'d': [{'e': 4}, {'f': 5}]},
'foo': {'a': 'world', 'b': 'hello'},
'qwe': {'rty': [{'n': 34}, {'x': 3}]},
'qwerty': {'i': 'o', 't': 'u'}})
self.assertTrue(d == d3)
class TestDotableDict(InvenioTestCase):
def test_get_attr(self):
dotable = DotableDict({'a': [{'b': 3, 'c': 5}]})
self.assertEqual(dotable.a, [{'b': 3, 'c': 5}])
def test_set_attr(self):
dotable = DotableDict({'a': [{'b': 3, 'c': 5}]})
dotable.d = 42
self.assertEqual(dotable.d, 42)
class TestFlattenMultict(InvenioTestCase):
def test_flatten_multidict(self):
d = MultiDict({'a': 3, 'b': {'c': 5}})
d2 = flatten_multidict(d)
self.assertEqual(d2, {'a': 3, 'b': {'c': 5}})
TEST_SUITE = make_test_suite(TestLazyDictionaries, TestSmartDict,
TestDotableDict)
if __name__ == "__main__":
run_test_suite(TEST_SUITE)

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