def execute_get_subset_raises_error_when_index_not_in_range(
self, batch_index: int):
full_query = 'Select * from t1;'
query = Query('test_uri', full_query,
QueryExecutionSettings(ExecutionPlanOptions(), None),
QueryEvents())
with self.assertRaises(IndexError) as context_manager:
query.get_subset(batch_index, 0, 10)
self.assertEquals(
'Batch index cannot be less than 0 or greater than the number of batches',
context_manager.exception.args[0])
def test_get_subset(self):
full_query = 'Select * from t1;'
query = Query('test_uri', full_query,
QueryExecutionSettings(ExecutionPlanOptions(), None),
QueryEvents())
expected_subset = []
mock_batch = mock.MagicMock()
mock_batch.get_subset = mock.Mock(return_value=expected_subset)
query._batches = [mock_batch]
subset = query.get_subset(0, 0, 10)
self.assertEqual(expected_subset, subset)
mock_batch.get_subset.assert_called_once_with(0, 10)