test_internal_structures.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.
"""Unit test suite for aws_encryption_sdk.internal.structures"""
import pytest

from aws_encryption_sdk.internal.structures import (
    EncryptedData, MessageFooter, MessageFrameBody, MessageHeaderAuthentication, MessageNoFrameBody
)
from .unit_test_utils import all_invalid_kwargs, all_valid_kwargs


VALID_KWARGS = {
    EncryptedData: [
        dict(ciphertext=b'asjfoiwaj', iv=None, tag=None),
        dict(ciphertext=b'asjfoiwaj', iv=b'ajsdhfiuaweh', tag=None),
        dict(ciphertext=b'asjfoiwaj', iv=None, tag=b'aosijfoiewj'),
        dict(ciphertext=b'asjfoiwaj', iv=b'ajsdhfiuaweh', tag=b'aosijfoiewj')
    ],
    MessageHeaderAuthentication: [
        dict(iv=b'oasijfoaiwej', tag=b'aisudhfoaweij')
    ],
    MessageFrameBody: [
        dict(
            iv=b'oaijefoiajew',
            ciphertext=b'oasidjfaowiejf',
            tag=b'ecoaiwjeconadf',
            sequence_number=42523,
            final_frame=False
        )
    ],
    MessageNoFrameBody: [
        dict(
            iv=b'afioaewj',
            ciphertext=b'oasjfoeiwjfio',
            tag=b'asfowaeijf'
        )
    ],
    MessageFooter: [
        dict(signature=b'oajwefiowjaeofi')
    ]
}
INVALID_KWARGS = {
    EncryptedData: [
        dict(ciphertext=None, iv=None, tag=None)
    ]
}


@pytest.mark.parametrize('cls, kwargs', all_valid_kwargs(VALID_KWARGS))
def test_attributes_valid_kwargs(cls, kwargs):
    cls(**kwargs)


@pytest.mark.parametrize('cls, kwargs', all_invalid_kwargs(VALID_KWARGS, INVALID_KWARGS))
def test_attributes_invalid_kwargs(cls, kwargs):
    with pytest.raises(TypeError):
        cls(**kwargs)


@pytest.mark.parametrize('attribute, value', (
    (MessageNoFrameBody.sequence_number, 1),
    (MessageNoFrameBody.final_frame, True)
))
def test_static_attributes(attribute, value):
    assert attribute == value