def test_populate_queue(self, mock_queue, mock_session, mock_executor):
mock_session.return_value = None
mock_queue.return_value = mock_queue
mock_page = {'NextPageToken': None, 'Values': []}
mock_session._fetch_page.return_value = {'Page': mock_page}
mock_queue.full.return_value = False
read_ahead_cursor = ReadAheadCursor(MOCK_STATEMENT_RESULT,
mock_session, MOCK_TRANSACTION_ID,
MOCK_READ_AHEAD, mock_executor)
read_ahead_cursor._queue = mock_queue
read_ahead_cursor._populate_queue()
mock_session._fetch_page.assert_called_once_with(
MOCK_TRANSACTION_ID, MOCK_STATEMENT_RESULT.get('NextPageToken'))
mock_queue.put.assert_called_once_with(mock_page, timeout=0.05)
def test_populate_queue_client_error(self, mock_session, mock_logger_debug,
mock_executor):
mock_logger_debug.return_value = None
mock_session.return_value = None
mock_session._fetch_page.side_effect = ClientError(
MOCK_CLIENT_ERROR_MESSAGE, MOCK_MESSAGE)
read_ahead_cursor = ReadAheadCursor(MOCK_STATEMENT_RESULT,
mock_session, MOCK_TRANSACTION_ID,
MOCK_READ_AHEAD, mock_executor)
read_ahead_cursor._queue = Queue(1)
read_ahead_cursor._queue.put('value to be removed')
read_ahead_cursor._populate_queue()
mock_logger_debug.assert_called_once()
self.assertIsInstance(read_ahead_cursor._queue.get(), ClientError)
self.assertEqual(read_ahead_cursor._queue.qsize(), 0)
def test_populate_queue(self, mock_queue, mock_session, mock_executor):
mock_session.return_value = None
mock_queue.return_value = mock_queue
mock_session._fetch_page.return_value = MOCK_FETCH_PAGE_RESULT_WITHOUT_TOKEN
mock_queue.full.return_value = False
read_ahead_cursor = ReadAheadCursor(MOCK_STATEMENT_RESULT,
mock_session, MOCK_TRANSACTION_ID,
MOCK_READ_AHEAD, mock_executor)
read_ahead_cursor._queue = mock_queue
read_ahead_cursor._populate_queue()
next_page_token = MOCK_STATEMENT_RESULT.get('FirstPage').get(
'NextPageToken')
mock_session._fetch_page.assert_called_once_with(
MOCK_TRANSACTION_ID, next_page_token)
mock_queue.put.assert_called_once_with(
MOCK_FETCH_PAGE_RESULT_WITHOUT_TOKEN, timeout=0.05)
def test_read_ahead_queue_with_query_stats(self, mock_session,
mock_executor):
mock_statement_result_1 = generate_statement_result(
1, 2, 3, MOCK_TOKEN, True)
mock_statement_result_2 = generate_statement_result(
1, 2, 3, MOCK_TOKEN, False)
mock_statement_result_3 = generate_statement_result(
1, 2, 3, None, False)
def fetch_page(txn_id, token):
statement_results = [
mock_statement_result_2, mock_statement_result_3
]
statement_result = statement_results[fetch_page.page_num]
fetch_page.page_num += 1
return statement_result
fetch_page.page_num = 0
mock_session.return_value = None
mock_session._fetch_page.side_effect = fetch_page
mock_read_ahead = 3
read_ahead_cursor = ReadAheadCursor(mock_statement_result_1,
mock_session, MOCK_TRANSACTION_ID,
mock_read_ahead, mock_executor)
read_ahead_cursor._value_holder_to_ion_value = MagicMock(
name='_value_holder_to_ion_value')
read_ahead_cursor._populate_queue()
# Queue should be populated with the next two pages
self.assertEqual(read_ahead_cursor._queue.qsize(), mock_read_ahead - 1)
# Even if queue is populated with the next two pages, query stats should only total the first page here
assert_query_stats(self, read_ahead_cursor, 1, 2, 3)
read_ahead_cursor._next_page()
# Query stats should only total the first page and second page here
assert_query_stats(self, read_ahead_cursor, 2, 4, 6)
read_ahead_cursor._next_page()
# Query stats should total all three pages
assert_query_stats(self, read_ahead_cursor, 3, 6, 9)
def test_populate_queue_result_closed_error(self, mock_session,
mock_logger_debug,
mock_executor):
def close_parent_txn(txn_id, token):
read_ahead_cursor._is_open = False
return MOCK_STATEMENT_RESULT
mock_logger_debug.return_value = None
mock_session.return_value = None
mock_session._fetch_page.side_effect = close_parent_txn
read_ahead_cursor = ReadAheadCursor(MOCK_STATEMENT_RESULT,
mock_session, MOCK_TRANSACTION_ID,
MOCK_READ_AHEAD, mock_executor)
read_ahead_cursor._queue = Queue(1)
read_ahead_cursor._queue.put('value to be removed')
read_ahead_cursor._populate_queue()
self.assertEqual(mock_logger_debug.call_count, 2)
self.assertIsInstance(read_ahead_cursor._queue.get(),
ResultClosedError)
self.assertEqual(read_ahead_cursor._queue.qsize(), 0)