LiamHecht commented on code in PR #75559: URL: https://github.com/apache/airflow/pull/75559#discussion_r4458289187
########## providers/google/tests/unit/google/cloud/transfers/test_presto_to_gcs.py: ########## @@ -0,0 +1,337 @@ +# +# Licensed to the Apache Software Foundation (ASF) under one +# or more contributor license agreements. See the NOTICE file +# distributed with this work for additional information +# regarding copyright ownership. The ASF licenses this file +# to you under the Apache License, Version 2.0 (the +# "License"); you may not use this file except in compliance +# with the License. You may obtain a copy of the License at +# +# http://www.apache.org/licenses/LICENSE-2.0 +# +# Unless required by applicable law or agreed to in writing, +# software distributed under the License is distributed on an +# "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY +# KIND, either express or implied. See the License for the +# specific language governing permissions and limitations +# under the License. +from __future__ import annotations + +from itertools import chain, repeat +from unittest.mock import MagicMock, patch + +import pytest +from prestodb.dbapi import Cursor as PrestoCursor + +from airflow.providers.google.cloud.transfers.presto_to_gcs import ( + PrestoToGCSOperator, + _PrestoToGCSPrestoCursorAdapter, +) + +TASK_ID = "test-presto-to-gcs" +PRESTO_CONN_ID = "my-presto-conn" +GCP_CONN_ID = "my-gcp-conn" +IMPERSONATION_CHAIN = ["ACCOUNT_1", "ACCOUNT_2", "ACCOUNT_3"] +SQL = "SELECT * FROM memory.default.test_multiple_types" +BUCKET = "gs://test" +FILENAME = "test_{}.ndjson" + +NDJSON_LINES = [ + b'{"some_num": 42, "some_str": "mock_row_content_1"}\n', + b'{"some_num": 43, "some_str": "mock_row_content_2"}\n', + b'{"some_num": 44, "some_str": "mock_row_content_3"}\n', +] +CSV_LINES = [ + b"some_num,some_str\r\n", + b"42,mock_row_content_1\r\n", + b"43,mock_row_content_2\r\n", + b"44,mock_row_content_3\r\n", +] +SCHEMA_FILENAME = "schema_test.json" +SCHEMA_JSON = b'[{"name": "some_num", "type": "INT64"}, {"name": "some_str", "type": "STRING"}]' + +ROWS = [ + [42, "mock_row_content_1"], + [43, "mock_row_content_2"], + [44, "mock_row_content_3"], +] + + +def _setup_mock_cursor(mock_presto_hook, str_type="VARCHAR"): + mock_cursor = mock_presto_hook.return_value.get_conn.return_value.cursor + mock_cursor.return_value.description = [ + ("some_num", "INTEGER", None, None, None, None, None), + ("some_str", str_type, None, None, None, None, None), + ] + mock_cursor.return_value.fetchone.side_effect = [*ROWS, None] + return mock_cursor + + +class TestPrestoToGCSPrestoCursorAdapter: + @pytest.fixture + def cursor(self): + cursor = MagicMock(spec=PrestoCursor) + cursor.fetchone.side_effect = chain(ROWS, repeat(None)) + cursor.arraysize = 2 + return cursor + + def test_description_peeks_first_row_without_consuming_it(self, cursor): + adapter = _PrestoToGCSPrestoCursorAdapter(cursor) + + assert adapter.description is cursor.description + assert adapter.initialized + assert cursor.fetchone.call_count == 1 + assert adapter.fetchone() == ROWS[0] + assert cursor.fetchone.call_count == 1 + + def test_description_does_not_peek_twice(self, cursor): + adapter = _PrestoToGCSPrestoCursorAdapter(cursor) + + adapter.description + adapter.description + + assert cursor.fetchone.call_count == 1 + + def test_peekone(self, cursor): + adapter = _PrestoToGCSPrestoCursorAdapter(cursor) + + assert adapter.peekone() == ROWS[0] + assert adapter.fetchone() == ROWS[0] + assert adapter.fetchone() == ROWS[1] + + def test_fetchmany_uses_arraysize_by_default(self, cursor): + adapter = _PrestoToGCSPrestoCursorAdapter(cursor) + + assert adapter.fetchmany() == ROWS[:2] + assert adapter.fetchmany() == ROWS[2:] + assert adapter.fetchmany() == [] + + def test_fetchmany_with_size(self, cursor): + adapter = _PrestoToGCSPrestoCursorAdapter(cursor) + + assert adapter.fetchmany(5) == ROWS + + def test_iteration(self, cursor): + adapter = _PrestoToGCSPrestoCursorAdapter(cursor) + + assert iter(adapter) is adapter + assert list(adapter) == ROWS + + @pytest.mark.parametrize("method", ["execute", "executemany"]) + def test_execute_resets_peeked_rows(self, cursor, method): + adapter = _PrestoToGCSPrestoCursorAdapter(cursor) + adapter.peekone() + + result = getattr(adapter, method)(SQL) + + assert result is getattr(cursor, method).return_value + getattr(cursor, method).assert_called_once_with(SQL) + assert not adapter.initialized + assert adapter.rows == [] + + def test_rowcount_and_close_delegate_to_cursor(self, cursor): + adapter = _PrestoToGCSPrestoCursorAdapter(cursor) + + assert adapter.rowcount is cursor.rowcount + adapter.close() + cursor.close.assert_called_once_with() + + +class TestPrestoToGCSOperator: + def test_init(self): + """Test PrestoToGCSOperator instance is properly initialized.""" + op = PrestoToGCSOperator( + task_id=TASK_ID, + sql=SQL, + bucket=BUCKET, + filename=FILENAME, + impersonation_chain=IMPERSONATION_CHAIN, + ) + assert op.task_id == TASK_ID + assert op.sql == SQL + assert op.bucket == BUCKET + assert op.filename == FILENAME + assert op.impersonation_chain == IMPERSONATION_CHAIN + assert op.presto_conn_id == "presto_default" + assert "presto_conn_id" in op.template_fields + + @pytest.mark.parametrize( + ("field_type", "expected_type"), + [ + ("integer", "INT64"), + ("BOOLEAN", "BOOL"), + ("DECIMAL(10, 2)", "NUMERIC"), + ("VARCHAR(20)", "STRING"), + ("TIMESTAMP", "TIMESTAMP"), + ("TIMESTAMP WITH TIME ZONE", "STRING"), + ("ARRAY(INTEGER)", "STRING"), + ], + ) + def test_field_to_bigquery(self, field_type, expected_type): + op = PrestoToGCSOperator(task_id=TASK_ID, sql=SQL, bucket=BUCKET, filename=FILENAME) + + assert op.field_to_bigquery(("col", field_type)) == {"name": "col", "type": expected_type} + + def test_convert_type_returns_value_unchanged(self): + op = PrestoToGCSOperator(task_id=TASK_ID, sql=SQL, bucket=BUCKET, filename=FILENAME) + value = object() + + assert op.convert_type(value, "STRING") is value + + @patch("airflow.providers.google.cloud.transfers.presto_to_gcs.PrestoHook", autospec=True) + @patch("airflow.providers.google.cloud.transfers.sql_to_gcs.GCSHook", autospec=True) + def test_save_as_json(self, mock_gcs_hook, mock_presto_hook): + def _assert_upload(bucket, obj, tmp_filename, mime_type, gzip, metadata=None): + assert bucket == BUCKET + assert FILENAME.format(0) == obj + assert mime_type == "application/json" + assert not gzip + with open(tmp_filename, "rb") as file: + assert b"".join(NDJSON_LINES) == file.read() + + mock_gcs_hook.return_value.upload.side_effect = _assert_upload + mock_cursor = _setup_mock_cursor(mock_presto_hook) + + op = PrestoToGCSOperator( + task_id=TASK_ID, + sql=SQL, + bucket=BUCKET, + filename=FILENAME, + presto_conn_id=PRESTO_CONN_ID, + gcp_conn_id=GCP_CONN_ID, + impersonation_chain=IMPERSONATION_CHAIN, + ) + + op.execute(None) + + mock_presto_hook.assert_called_once_with(presto_conn_id=PRESTO_CONN_ID) + mock_cursor.return_value.execute.assert_called_once_with(SQL) + mock_gcs_hook.assert_called_once_with( + gcp_conn_id=GCP_CONN_ID, + impersonation_chain=IMPERSONATION_CHAIN, + ) + mock_gcs_hook.return_value.upload.assert_called_once() + + @patch("airflow.providers.google.cloud.transfers.presto_to_gcs.PrestoHook", autospec=True) + @patch("airflow.providers.google.cloud.transfers.sql_to_gcs.GCSHook", autospec=True) + def test_save_as_json_with_file_splitting(self, mock_gcs_hook, mock_presto_hook): + """Test that ndjson is split by approx_max_file_size_bytes param.""" + expected_upload = { + FILENAME.format(0): b"".join(NDJSON_LINES[:2]), + FILENAME.format(1): NDJSON_LINES[2], + } + + def _assert_upload(bucket, obj, tmp_filename, mime_type, gzip, metadata=None): + assert bucket == BUCKET + assert mime_type == "application/json" + assert not gzip + with open(tmp_filename, "rb") as file: + assert expected_upload[obj] == file.read() + + mock_gcs_hook.return_value.upload.side_effect = _assert_upload + _setup_mock_cursor(mock_presto_hook, str_type="VARCHAR(20)") + + op = PrestoToGCSOperator( + task_id=TASK_ID, + sql=SQL, + bucket=BUCKET, + filename=FILENAME, + approx_max_file_size_bytes=len(expected_upload[FILENAME.format(0)]), + ) + + op.execute(None) + + assert mock_gcs_hook.return_value.upload.call_count == 2 + + @patch("airflow.providers.google.cloud.transfers.presto_to_gcs.PrestoHook", autospec=True) + @patch("airflow.providers.google.cloud.transfers.sql_to_gcs.GCSHook", autospec=True) + def test_save_as_csv(self, mock_gcs_hook, mock_presto_hook): + def _assert_upload(bucket, obj, tmp_filename, mime_type, gzip, metadata=None): + assert bucket == BUCKET + assert FILENAME.format(0) == obj + assert mime_type == "text/csv" + assert not gzip + with open(tmp_filename, "rb") as file: + assert b"".join(CSV_LINES) == file.read() + + mock_gcs_hook.return_value.upload.side_effect = _assert_upload + _setup_mock_cursor(mock_presto_hook) + + op = PrestoToGCSOperator( + task_id=TASK_ID, + sql=SQL, + bucket=BUCKET, + filename=FILENAME, + export_format="csv", + presto_conn_id=PRESTO_CONN_ID, + gcp_conn_id=GCP_CONN_ID, + impersonation_chain=IMPERSONATION_CHAIN, + ) + + op.execute(None) + + mock_presto_hook.assert_called_once_with(presto_conn_id=PRESTO_CONN_ID) + mock_gcs_hook.assert_called_once_with( + gcp_conn_id=GCP_CONN_ID, + impersonation_chain=IMPERSONATION_CHAIN, + ) + mock_gcs_hook.return_value.upload.assert_called_once() + + @patch("airflow.providers.google.cloud.transfers.presto_to_gcs.PrestoHook", autospec=True) + @patch("airflow.providers.google.cloud.transfers.sql_to_gcs.GCSHook", autospec=True) + def test_save_as_csv_with_file_splitting(self, mock_gcs_hook, mock_presto_hook): + """Test that csv is split by approx_max_file_size_bytes param.""" + expected_upload = { + FILENAME.format(0): b"".join(CSV_LINES[:3]), + FILENAME.format(1): b"".join([CSV_LINES[0], CSV_LINES[3]]), + } + + def _assert_upload(bucket, obj, tmp_filename, mime_type, gzip, metadata=None): + assert bucket == BUCKET + assert mime_type == "text/csv" + assert not gzip + with open(tmp_filename, "rb") as file: + assert expected_upload[obj] == file.read() + + mock_gcs_hook.return_value.upload.side_effect = _assert_upload + _setup_mock_cursor(mock_presto_hook, str_type="VARCHAR(20)") + + op = PrestoToGCSOperator( + task_id=TASK_ID, + sql=SQL, + bucket=BUCKET, + filename=FILENAME, + approx_max_file_size_bytes=len(expected_upload[FILENAME.format(0)]), + export_format="csv", + ) + + op.execute(None) + + assert mock_gcs_hook.return_value.upload.call_count == 2 + + @pytest.mark.parametrize("export_format", ["json", "csv"]) + @patch("airflow.providers.google.cloud.transfers.presto_to_gcs.PrestoHook", autospec=True) + @patch("airflow.providers.google.cloud.transfers.sql_to_gcs.GCSHook", autospec=True) + def test_save_with_schema_file(self, mock_gcs_hook, mock_presto_hook, export_format): Review Comment: Renamed to test_save_schema_file. -- This is an automated message from the Apache Git Service. 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