def test__getitem__(self):
"""
Check the DataStore base class gets the requested item and does the
necessary magic to return the value without associated metadata.
"""
self.assertTrue(hasattr(DataStore, '__getitem__'))
ds = DataStore()
val = 'some arbitrary yet meaningless value'
ds._get_item = MagicMock(return_value=(val, None, 0.0))
result = ds['foo']
self.assertEqual(val, result)
ds._get_item.assert_called_once_with('foo')
def test_accessed(self):
"""
Check the DataStore baase class gets the requested item and return the
timestamp in position 2 of the tuple.
"""
self.assertTrue(hasattr(DataStore, 'accessed'))
ds = DataStore()
timestamp = time.time()
ds._get_item = MagicMock(return_value=(None, None, timestamp))
result = ds.accessed('foo')
self.assertEqual(timestamp, result)
ds._get_item.assert_called_once_with('foo')
def test_publisher(self):
"""
Check the DataStore base class gets the requested item and returns the
public key of the publisher associated with the item.
"""
self.assertTrue(hasattr(DataStore, 'publisher'))
ds = DataStore()
val = {
'public_key': PUBLIC_KEY
}
ds._get_item = MagicMock(return_value=(val, None, 0.0))
result = ds.publisher('foo')
self.assertEqual(PUBLIC_KEY, result)
ds._get_item.assert_called_once_with('foo')
def test_created(self):
"""
Check the DataStore base class gets the requested item and returns the
creation timestamp that the publisher has associated with the item.
"""
self.assertTrue(hasattr(DataStore, 'created'))
ds = DataStore()
timestamp = time.time()
val = {
'timestamp': timestamp
}
ds._get_item = MagicMock(return_value=(val, None, 0.0))
result = ds.created('foo')
self.assertEqual(timestamp, result)
ds._get_item.assert_called_once_with('foo')
def test_keys(self):
"""
Check the DataStore base class has a keys method.
"""
self.assertTrue(hasattr(DataStore, 'keys'))
ds = DataStore()
self.assertRaises(NotImplementedError, ds.keys)
def test_get_item(self):
"""
Check the DataStore base class has a set_item method.
"""
self.assertTrue(hasattr(DataStore, '_get_item'))
ds = DataStore()
self.assertRaises(NotImplementedError, ds._get_item, 'foo')
def test__del__(self):
"""
Check the DataStore base class has a __delitem__ method.
"""
self.assertTrue(hasattr(DataStore, '__delitem__'))
ds = DataStore()
with self.assertRaises(NotImplementedError):
del ds['item']
def test_set_item(self):
"""
Check the DataStore base class has a set_item method.
"""
self.assertTrue(hasattr(DataStore, '_set_item'))
ds = DataStore()
self.assertRaises(NotImplementedError, ds._set_item, 'foo',
'some arbitrary yet meaningless value')
def test__setitem__existing_value(self):
"""
Check the DataStore base class has a __setitem__ method.
"""
self.assertTrue(hasattr(DataStore, '__setitem__'))
ds = DataStore()
val = 'some arbitrary yet meaningless value'
timestamp = time.time()
ds._get_item = MagicMock(return_value=(val, timestamp, 0.0))
ds._set_item = MagicMock()
ds['foo'] = val
self.assertEqual(1, ds._set_item.call_count)
call_args = ds._set_item.call_args[0]
self.assertEqual('foo', call_args[0])
self.assertIsInstance(call_args[1], tuple)
self.assertEqual(val, call_args[1][0])
self.assertTrue(timestamp < call_args[1][1])
self.assertEqual(0.0, call_args[1][2])
def test__setitem__new_value(self):
"""
Check the DataStore base class has a __setitem__ method.
"""
self.assertTrue(hasattr(DataStore, '__setitem__'))
ds = DataStore()
val = 'some arbitrary yet meaningless value'
ds._set_item = MagicMock()
def side_effect(*args, **kwargs):
raise KeyError()
ds._get_item = MagicMock(side_effect=side_effect)
ds['foo'] = val
self.assertEqual(1, ds._set_item.call_count)
call_args = ds._set_item.call_args[0]
self.assertEqual('foo', call_args[0])
self.assertIsInstance(call_args[1], tuple)
self.assertEqual(val, call_args[1][0])
self.assertIsInstance(call_args[1][1], float)
self.assertEqual(call_args[1][2], 0.0)
def test_touch(self):
"""
Ensure that the touch method updates the timestamp for a referenced
item.
"""
self.assertTrue(hasattr(DataStore, 'touch'))
ds = DataStore()
timestamp = time.time()
ds._get_item = MagicMock(return_value=('bar', timestamp, timestamp))
ds._set_item = MagicMock()
ds.touch('foo')
self.assertEqual(1, ds._set_item.call_count)
args = ds._set_item.call_args_list[0][0]
self.assertEqual('foo', args[0])
self.assertEqual('bar', args[1][0])
self.assertEqual(args[1][1], timestamp)
self.assertTrue(args[1][2] > timestamp)
