"""Test data.iter_postings function"""
# Copyright © 2020  Brett Smith
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU Affero General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU Affero General Public License for more details.
#
# You should have received a copy of the GNU Affero General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

import pytest

from . import testutil

from conservancy_beancount import data

@pytest.fixture
def simple_txn(index=None, key=None):
    return testutil.Transaction(note='txn note', postings=[
        ('Assets:Cash', 5),
        ('Income:Donations', -5, {'note': 'donation love', 'extra': 'Extra'}),
    ])

def test_iter_postings(simple_txn):
    for source, post in zip(simple_txn.postings, data.iter_postings(simple_txn)):
        assert all(source[x] == post[x] for x in range(len(source) - 1))
        assert isinstance(post.account, data.Account)
        assert post.meta['note']  # Only works with PostingMeta

def test_setting_metadata_propagates_to_source(simple_txn):
    for index, post in enumerate(data.iter_postings(simple_txn)):
        post.meta['edited'] = str(index)
    for index, post in enumerate(simple_txn.postings):
        assert post.meta['edited'] == str(index)
        assert not isinstance(post.meta, data.PostingMeta)

def test_deleting_metadata_propagates_to_source(simple_txn):
    posts = list(data.iter_postings(simple_txn))
    del posts[1].meta['extra']
    assert 'extra' not in simple_txn.postings[1].meta