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"""Test diskcache.persistent.Deque.""" |
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import pickle |
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import shutil |
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import tempfile |
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from unittest import mock |
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import pytest |
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import diskcache as dc |
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from diskcache.core import ENOVAL |
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def rmdir(directory): |
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try: |
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shutil.rmtree(directory) |
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except OSError: |
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pass |
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@pytest.fixture |
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def deque(): |
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deque = dc.Deque() |
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yield deque |
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rmdir(deque.directory) |
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def test_init(): |
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directory = tempfile.mkdtemp() |
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sequence = list('abcde') |
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deque = dc.Deque(sequence, None) |
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assert deque == sequence |
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rmdir(deque.directory) |
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del deque |
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rmdir(directory) |
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deque = dc.Deque(sequence, directory) |
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assert deque.directory == directory |
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assert deque == sequence |
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other = dc.Deque(directory=directory) |
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assert other == deque |
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del deque |
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del other |
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rmdir(directory) |
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def test_getsetdel(deque): |
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sequence = list('abcde') |
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assert len(deque) == 0 |
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for key in sequence: |
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deque.append(key) |
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assert len(deque) == len(sequence) |
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for index in range(len(sequence)): |
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assert deque[index] == sequence[index] |
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for index in range(len(sequence)): |
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deque[index] = index |
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for index in range(len(sequence)): |
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assert deque[index] == index |
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for index in range(len(sequence)): |
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if index % 2: |
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del deque[-1] |
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else: |
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del deque[0] |
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assert len(deque) == 0 |
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def test_append(deque): |
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deque.maxlen = 3 |
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for item in 'abcde': |
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deque.append(item) |
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assert deque == 'cde' |
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def test_appendleft(deque): |
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deque.maxlen = 3 |
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for item in 'abcde': |
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deque.appendleft(item) |
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assert deque == 'edc' |
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def test_index_positive(deque): |
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cache = mock.MagicMock() |
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cache.__len__.return_value = 3 |
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cache.iterkeys.return_value = ['a', 'b', 'c'] |
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cache.__getitem__.side_effect = [KeyError, 101, 102] |
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with mock.patch.object(deque, '_cache', cache): |
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assert deque[0] == 101 |
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def test_index_negative(deque): |
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cache = mock.MagicMock() |
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cache.__len__.return_value = 3 |
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cache.iterkeys.return_value = ['c', 'b', 'a'] |
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cache.__getitem__.side_effect = [KeyError, 101, 100] |
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with mock.patch.object(deque, '_cache', cache): |
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assert deque[-1] == 101 |
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def test_index_out_of_range(deque): |
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cache = mock.MagicMock() |
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cache.__len__.return_value = 3 |
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cache.iterkeys.return_value = ['a', 'b', 'c'] |
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cache.__getitem__.side_effect = [KeyError] * 3 |
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with mock.patch.object(deque, '_cache', cache): |
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with pytest.raises(IndexError): |
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deque[0] |
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def test_iter_keyerror(deque): |
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cache = mock.MagicMock() |
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cache.iterkeys.return_value = ['a', 'b', 'c'] |
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cache.__getitem__.side_effect = [KeyError, 101, 102] |
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with mock.patch.object(deque, '_cache', cache): |
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assert list(iter(deque)) == [101, 102] |
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def test_reversed(deque): |
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sequence = list('abcde') |
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deque += sequence |
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assert list(reversed(deque)) == list(reversed(sequence)) |
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def test_reversed_keyerror(deque): |
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cache = mock.MagicMock() |
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cache.iterkeys.return_value = ['c', 'b', 'a'] |
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cache.__getitem__.side_effect = [KeyError, 101, 100] |
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with mock.patch.object(deque, '_cache', cache): |
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assert list(reversed(deque)) == [101, 100] |
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def test_state(deque): |
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sequence = list('abcde') |
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deque.extend(sequence) |
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assert deque == sequence |
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deque.maxlen = 3 |
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assert list(deque) == sequence[-3:] |
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state = pickle.dumps(deque) |
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values = pickle.loads(state) |
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assert values == sequence[-3:] |
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assert values.maxlen == 3 |
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def test_compare(deque): |
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assert not (deque == {}) |
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assert not (deque == [0]) |
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assert deque != [1] |
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deque.append(0) |
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assert deque <= [0] |
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assert deque <= [1] |
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def test_indexerror_negative(deque): |
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with pytest.raises(IndexError): |
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deque[-1] |
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def test_indexerror(deque): |
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with pytest.raises(IndexError): |
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deque[0] |
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def test_repr(): |
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directory = tempfile.mkdtemp() |
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deque = dc.Deque(directory=directory) |
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assert repr(deque) == 'Deque(directory=%r)' % directory |
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def test_copy(deque): |
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sequence = list('abcde') |
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deque.extend(sequence) |
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temp = deque.copy() |
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assert deque == sequence |
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assert temp == sequence |
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def test_count(deque): |
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deque += 'abbcccddddeeeee' |
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for index, value in enumerate('abcde', 1): |
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assert deque.count(value) == index |
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def test_extend(deque): |
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sequence = list('abcde') |
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deque.extend(sequence) |
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assert deque == sequence |
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def test_extendleft(deque): |
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sequence = list('abcde') |
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deque.extendleft(sequence) |
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assert deque == list(reversed(sequence)) |
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def test_pop(deque): |
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sequence = list('abcde') |
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deque.extend(sequence) |
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while sequence: |
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assert deque.pop() == sequence.pop() |
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def test_pop_indexerror(deque): |
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with pytest.raises(IndexError): |
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deque.pop() |
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def test_popleft(deque): |
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sequence = list('abcde') |
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deque.extend(sequence) |
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while sequence: |
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value = sequence[0] |
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assert deque.popleft() == value |
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del sequence[0] |
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def test_popleft_indexerror(deque): |
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with pytest.raises(IndexError): |
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deque.popleft() |
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def test_remove(deque): |
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deque.extend('abaca') |
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deque.remove('a') |
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assert deque == 'baca' |
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deque.remove('a') |
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assert deque == 'bca' |
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deque.remove('a') |
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assert deque == 'bc' |
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def test_remove_valueerror(deque): |
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with pytest.raises(ValueError): |
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deque.remove(0) |
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def test_remove_keyerror(deque): |
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cache = mock.MagicMock() |
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cache.iterkeys.return_value = ['a', 'b', 'c'] |
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cache.__getitem__.side_effect = [KeyError, 100, 100] |
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cache.__delitem__.side_effect = [KeyError, None] |
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with mock.patch.object(deque, '_cache', cache): |
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deque.remove(100) |
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def test_reverse(deque): |
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deque += 'abcde' |
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deque.reverse() |
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assert deque == 'edcba' |
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def test_rotate_typeerror(deque): |
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with pytest.raises(TypeError): |
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deque.rotate(0.5) |
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def test_rotate(deque): |
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deque.rotate(1) |
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deque.rotate(-1) |
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deque += 'abcde' |
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deque.rotate(3) |
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assert deque == 'cdeab' |
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def test_rotate_negative(deque): |
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deque += 'abcde' |
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deque.rotate(-2) |
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assert deque == 'cdeab' |
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def test_rotate_indexerror(deque): |
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deque += 'abc' |
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cache = mock.MagicMock() |
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cache.__len__.return_value = 3 |
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cache.pull.side_effect = [(None, ENOVAL)] |
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with mock.patch.object(deque, '_cache', cache): |
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deque.rotate(1) |
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def test_rotate_indexerror_negative(deque): |
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deque += 'abc' |
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cache = mock.MagicMock() |
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cache.__len__.return_value = 3 |
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cache.pull.side_effect = [(None, ENOVAL)] |
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with mock.patch.object(deque, '_cache', cache): |
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deque.rotate(-1) |
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def test_peek(deque): |
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value = b'x' * 100_000 |
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deque.append(value) |
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assert len(deque) == 1 |
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assert deque.peek() == value |
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assert len(deque) == 1 |
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assert deque.peek() == value |
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assert len(deque) == 1 |
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