def test_extraction_with_single_result(self): # type: () -> None with patch.object(SQLAlchemyExtractor, '_get_connection') as mock_connection: connection = MagicMock() mock_connection.return_value = connection sql_execute = MagicMock() connection.execute = sql_execute table = {'schema': 'test_schema', 'name': 'test_table', 'description': 'a table for testing', 'cluster': self.conf['extractor.postgres_metadata.{}'.format(PostgresMetadataExtractor.CLUSTER_KEY)] } sql_execute.return_value = [ self._union( {'col_name': 'col_id1', 'col_type': 'bigint', 'col_description': 'description of id1', 'col_sort_order': 0}, table), self._union( {'col_name': 'col_id2', 'col_type': 'bigint', 'col_description': 'description of id2', 'col_sort_order': 1}, table), self._union( {'col_name': 'is_active', 'col_type': 'boolean', 'col_description': None, 'col_sort_order': 2}, table), self._union( {'col_name': 'source', 'col_type': 'varchar', 'col_description': 'description of source', 'col_sort_order': 3}, table), self._union( {'col_name': 'etl_created_at', 'col_type': 'timestamp', 'col_description': 'description of etl_created_at', 'col_sort_order': 4}, table), self._union( {'col_name': 'ds', 'col_type': 'varchar', 'col_description': None, 'col_sort_order': 5}, table) ] extractor = PostgresMetadataExtractor() extractor.init(self.conf) actual = extractor.extract() expected = TableMetadata('postgres', 'MY_CLUSTER', 'test_schema', 'test_table', 'a table for testing', [ColumnMetadata('col_id1', 'description of id1', 'bigint', 0), ColumnMetadata('col_id2', 'description of id2', 'bigint', 1), ColumnMetadata('is_active', None, 'boolean', 2), ColumnMetadata('source', 'description of source', 'varchar', 3), ColumnMetadata('etl_created_at', 'description of etl_created_at', 'timestamp', 4), ColumnMetadata('ds', None, 'varchar', 5)]) self.assertEqual(expected.__repr__(), actual.__repr__()) self.assertIsNone(extractor.extract())
def test_extraction_with_empty_query_result(self) -> None: """ Test Extraction with empty result from query """ with patch.object(SQLAlchemyExtractor, '_get_connection'): extractor = PostgresMetadataExtractor() extractor.init(self.conf) results = extractor.extract() self.assertEqual(results, None)
def test_extraction_with_multiple_result(self) -> None: with patch.object(SQLAlchemyExtractor, '_get_connection') as mock_connection: connection = MagicMock() mock_connection.return_value = connection sql_execute = MagicMock() connection.execute = sql_execute table = {'schema': 'test_schema1', 'name': 'test_table1', 'description': 'test table 1', 'cluster': self.conf[PostgresMetadataExtractor.CLUSTER_KEY] } table1 = {'schema': 'test_schema1', 'name': 'test_table2', 'description': 'test table 2', 'cluster': self.conf[PostgresMetadataExtractor.CLUSTER_KEY] } table2 = {'schema': 'test_schema2', 'name': 'test_table3', 'description': 'test table 3', 'cluster': self.conf[PostgresMetadataExtractor.CLUSTER_KEY] } sql_execute.return_value = [ self._union( {'col_name': 'col_id1', 'col_type': 'bigint', 'col_description': 'description of col_id1', 'col_sort_order': 0}, table), self._union( {'col_name': 'col_id2', 'col_type': 'bigint', 'col_description': 'description of col_id2', 'col_sort_order': 1}, table), self._union( {'col_name': 'is_active', 'col_type': 'boolean', 'col_description': None, 'col_sort_order': 2}, table), self._union( {'col_name': 'source', 'col_type': 'varchar', 'col_description': 'description of source', 'col_sort_order': 3}, table), self._union( {'col_name': 'etl_created_at', 'col_type': 'timestamp', 'col_description': 'description of etl_created_at', 'col_sort_order': 4}, table), self._union( {'col_name': 'ds', 'col_type': 'varchar', 'col_description': None, 'col_sort_order': 5}, table), self._union( {'col_name': 'col_name', 'col_type': 'varchar', 'col_description': 'description of col_name', 'col_sort_order': 0}, table1), self._union( {'col_name': 'col_name2', 'col_type': 'varchar', 'col_description': 'description of col_name2', 'col_sort_order': 1}, table1), self._union( {'col_name': 'col_id3', 'col_type': 'varchar', 'col_description': 'description of col_id3', 'col_sort_order': 0}, table2), self._union( {'col_name': 'col_name3', 'col_type': 'varchar', 'col_description': 'description of col_name3', 'col_sort_order': 1}, table2) ] extractor = PostgresMetadataExtractor() extractor.init(self.conf) expected = TableMetadata('postgres', self.conf[PostgresMetadataExtractor.CLUSTER_KEY], 'test_schema1', 'test_table1', 'test table 1', [ColumnMetadata('col_id1', 'description of col_id1', 'bigint', 0), ColumnMetadata('col_id2', 'description of col_id2', 'bigint', 1), ColumnMetadata('is_active', None, 'boolean', 2), ColumnMetadata('source', 'description of source', 'varchar', 3), ColumnMetadata('etl_created_at', 'description of etl_created_at', 'timestamp', 4), ColumnMetadata('ds', None, 'varchar', 5)]) self.assertEqual(expected.__repr__(), extractor.extract().__repr__()) expected = TableMetadata('postgres', self.conf[PostgresMetadataExtractor.CLUSTER_KEY], 'test_schema1', 'test_table2', 'test table 2', [ColumnMetadata('col_name', 'description of col_name', 'varchar', 0), ColumnMetadata('col_name2', 'description of col_name2', 'varchar', 1)]) self.assertEqual(expected.__repr__(), extractor.extract().__repr__()) expected = TableMetadata('postgres', self.conf[PostgresMetadataExtractor.CLUSTER_KEY], 'test_schema2', 'test_table3', 'test table 3', [ColumnMetadata('col_id3', 'description of col_id3', 'varchar', 0), ColumnMetadata('col_name3', 'description of col_name3', 'varchar', 1)]) self.assertEqual(expected.__repr__(), extractor.extract().__repr__()) self.assertIsNone(extractor.extract()) self.assertIsNone(extractor.extract())