text: # -*- coding: utf-8 -*-
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  #
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  # "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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  # under the License.
  
  import unittest
  
  from airflow.hooks.postgres_hook import PostgresHook
  from airflow.operators.postgres_to_gcs import PostgresToGoogleCloudStorageOperator
  from tests.compat import patch
  
  TABLES = {'postgres_to_gcs_operator', 'postgres_to_gcs_operator_empty'}
  
  TASK_ID = 'test-postgres-to-gcs'
  POSTGRES_CONN_ID = 'postgres_default'
  SQL = 'SELECT * FROM postgres_to_gcs_operator'
  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'
  ]
  SCHEMA_FILENAME = 'schema_test.json'
  SCHEMA_JSON = b'[{"mode": "NULLABLE", "name": "some_str", "type": "STRING"}, ' \
                b'{"mode": "NULLABLE", "name": "some_num", "type": "INTEGER"}]'
  
  
  class TestPostgresToGoogleCloudStorageOperator(unittest.TestCase):
      @classmethod
      def setUpClass(cls):
          postgres = PostgresHook()
          with postgres.get_conn() as conn:
              with conn.cursor() as cur:
                  for table in TABLES:
                      cur.execute("DROP TABLE IF EXISTS {} CASCADE;".format(table))
                      cur.execute("CREATE TABLE {}(some_str varchar, some_num integer);"
                                  .format(table))
  
                  cur.execute(
                      "INSERT INTO postgres_to_gcs_operator VALUES(%s, %s);",
                      ('mock_row_content_1', 42)
                  )
                  cur.execute(
                      "INSERT INTO postgres_to_gcs_operator VALUES(%s, %s);",
                      ('mock_row_content_2', 43)
                  )
                  cur.execute(
                      "INSERT INTO postgres_to_gcs_operator VALUES(%s, %s);",
                      ('mock_row_content_3', 44)
                  )
  
      @classmethod
      def tearDownClass(cls):
          postgres = PostgresHook()
          with postgres.get_conn() as conn:
              with conn.cursor() as cur:
                  for table in TABLES:
                      cur.execute("DROP TABLE IF EXISTS {} CASCADE;".format(table))
  
      def test_init(self):
          """Test PostgresToGoogleCloudStorageOperator instance is properly initialized."""
          op = PostgresToGoogleCloudStorageOperator(
              task_id=TASK_ID, sql=SQL, bucket=BUCKET, filename=FILENAME)
          self.assertEqual(op.task_id, TASK_ID)
          self.assertEqual(op.sql, SQL)
          self.assertEqual(op.bucket, BUCKET)
          self.assertEqual(op.filename, FILENAME)
  
      @patch('airflow.operators.sql_to_gcs.GoogleCloudStorageHook')
      def test_exec_success(self, gcs_hook_mock_class):
          """Test the execute function in case where the run is successful."""
          op = PostgresToGoogleCloudStorageOperator(
              task_id=TASK_ID,
              postgres_conn_id=POSTGRES_CONN_ID,
              sql=SQL,
              bucket=BUCKET,
              filename=FILENAME)
  
          gcs_hook_mock = gcs_hook_mock_class.return_value
  
          def _assert_upload(bucket, obj, tmp_filename, mime_type, gzip):
              self.assertEqual(BUCKET, bucket)
              self.assertEqual(FILENAME.format(0), obj)
              self.assertEqual('application/json', mime_type)
              self.assertFalse(gzip)
              with open(tmp_filename, 'rb') as file:
                  self.assertEqual(b''.join(NDJSON_LINES), file.read())
  
          gcs_hook_mock.upload.side_effect = _assert_upload
  
          op.execute(None)
  
      @patch('airflow.operators.sql_to_gcs.GoogleCloudStorageHook')
      def test_file_splitting(self, gcs_hook_mock_class):
          """Test that ndjson is split by approx_max_file_size_bytes param."""
  
          gcs_hook_mock = gcs_hook_mock_class.return_value
          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):
              self.assertEqual(BUCKET, bucket)
              self.assertEqual('application/json', mime_type)
              self.assertFalse(gzip)
              with open(tmp_filename, 'rb') as file:
                  self.assertEqual(expected_upload[obj], file.read())
  
          gcs_hook_mock.upload.side_effect = _assert_upload
  
          op = PostgresToGoogleCloudStorageOperator(
              task_id=TASK_ID,
              sql=SQL,
              bucket=BUCKET,
              filename=FILENAME,
              approx_max_file_size_bytes=len(expected_upload[FILENAME.format(0)]))
          op.execute(None)
  
      @patch('airflow.operators.sql_to_gcs.GoogleCloudStorageHook')
      def test_schema_file(self, gcs_hook_mock_class):
          """Test writing schema files."""
  
          gcs_hook_mock = gcs_hook_mock_class.return_value
  
          def _assert_upload(bucket, obj, tmp_filename, mime_type, gzip):  # pylint: disable=unused-argument
              if obj == SCHEMA_FILENAME:
                  with open(tmp_filename, 'rb') as file:
                      self.assertEqual(SCHEMA_JSON, file.read())
  
          gcs_hook_mock.upload.side_effect = _assert_upload
  
          op = PostgresToGoogleCloudStorageOperator(
              task_id=TASK_ID,
              sql=SQL,
              bucket=BUCKET,
              filename=FILENAME,
              schema_filename=SCHEMA_FILENAME)
          op.execute(None)
  
          # once for the file and once for the schema
          self.assertEqual(2, gcs_hook_mock.upload.call_count)
  