test_providers_raw_master_key_provider.py

# Copyright 2017 Amazon.com, Inc. or its affiliates. All Rights Reserved.
#
# Licensed under the Apache License, Version 2.0 (the "License"). You
# may not use this file except in compliance with the License. A copy of
# the License is located at
#
# http://aws.amazon.com/apache2.0/
#
# or in the "license" file accompanying this file. This file 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.
"""Test suite for aws_encryption_sdk.key_providers.raw.RawMasterKeyProvider"""
import attr
import pytest
from mock import MagicMock, patch, sentinel

from aws_encryption_sdk.key_providers.base import MasterKeyProvider, MasterKeyProviderConfig
from aws_encryption_sdk.key_providers.raw import RawMasterKeyProvider

from .test_values import VALUES

pytestmark = [pytest.mark.unit, pytest.mark.local]


_MOCK_RAW_MASTER_KEY = MagicMock()


@attr.s
class MockRawMasterKeyProviderConfig(MasterKeyProviderConfig):
    mock_wrapping_key = attr.ib()


class MockRawMasterKeyProvider(RawMasterKeyProvider):
    _config_class = MockRawMasterKeyProviderConfig
    provider_id = VALUES["provider_id"]

    def _get_raw_key(self, key_id):
        return self.config.mock_wrapping_key


class TestRawMasterKeyProvider(object):
    def test_parent(self):
        assert issubclass(RawMasterKeyProvider, MasterKeyProvider)

    def test_get_raw_key_enforcement(self):
        class TestProvider(RawMasterKeyProvider):
            pass

        with pytest.raises(TypeError) as excinfo:
            TestProvider()
        excinfo.match("Can't instantiate abstract class TestProvider *")

    @patch(
        "aws_encryption_sdk.key_providers.raw.RawMasterKeyConfig", return_value=sentinel.raw_master_key_config_instance
    )
    def test_new_master_key(self, mock_raw_master_key_config):
        mock_raw_master_key = MagicMock(return_value=sentinel.raw_master_key)
        mock_get_raw_key = MagicMock(return_value=sentinel.wrapping_key)

        class MockRawMasterKeyProvider2(MockRawMasterKeyProvider):
            _master_key_class = mock_raw_master_key
            _get_raw_key = mock_get_raw_key

        mock_master_key_provider = MockRawMasterKeyProvider2(mock_wrapping_key=sentinel.parent_wrapping_key)
        test = mock_master_key_provider._new_master_key(sentinel.key_info)
        mock_raw_master_key_config.assert_called_once_with(
            key_id=sentinel.key_info, provider_id=VALUES["provider_id"], wrapping_key=sentinel.wrapping_key
        )
        mock_raw_master_key.assert_called_once_with(config=sentinel.raw_master_key_config_instance)
        assert test is sentinel.raw_master_key