def test_read_only_cache(new_client, tmp_path):

    db_path = tmp_path / 'test.db'

    ticket_id, _, expected = EXPECTED_URLS[0]

    expected = DEFAULT_RT_URL + expected

    with new_cache(db_path) as cache1:

        rt1 = rtutil.RT(new_client, cache1)

        assert rt1.url(ticket_id) == expected

    new_client.TICKET_DATA.clear()

    db_path.chmod(0o400)

    with new_cache(db_path) as cache2:

        rt2 = rtutil.RT(new_client, cache2)

        assert rt2.url(ticket_id) == expected

        assert rt2.url(ticket_id + 1) is None

def test_results_not_found_only_in_transient_cache(new_client):

    with new_cache() as cache:

        rt1 = rtutil.RT(new_client, cache)

        rt2 = rtutil.RT(new_client, cache)

        assert not rt1.exists(9)

        new_client.TICKET_DATA['9'] = [('99', '(Unnamed)', 'text/plain', '0b')]

        assert not rt1.exists(9)

        assert rt2.exists(9)

    txn_meta = {

        'rt-id': 'rt:1',

        'contract': 'RepoLink.pdf',

        'statement': 'doc1.txt rt:1/4 doc2.txt',

    }

    txn = testutil.Transaction(**txn_meta, postings=[

        ('Income:Donations', -10, {'receipt': 'rt:2/13 donation.txt'}),

        ('Assets:Cash', 10, {'receipt': 'cash.png rt:2/14'}),

    ])

    actual = rt.txn_with_urls(txn)

    def check(source, key, ticket_id, attachment_id=None):

        url_path = EXPECTED_URLS_MAP[(ticket_id, attachment_id)]

        assert f'<{DEFAULT_RT_URL}{url_path}>' in source.meta[key]

    expected_keys = set(txn_meta)

    expected_keys.update(['filename', 'lineno'])

    assert set(actual.meta) == expected_keys

    check(actual, 'rt-id', 1)

    assert actual.meta['contract'] == txn_meta['contract']

    assert actual.meta['statement'].startswith('doc1.txt ')

    check(actual, 'statement', 1, 4)

    check(actual.postings[0], 'receipt', 2, 13)

    assert actual.postings[0].meta['receipt'].endswith(' donation.txt')

    check(actual.postings[1], 'receipt', 2, 14)

    assert actual.postings[1].meta['receipt'].startswith('cash.png ')

    # Check the original transaction is unchanged

    for key, expected in txn_meta.items():

        assert txn.meta[key] == expected

    assert txn.postings[0].meta['receipt'] == 'rt:2/13 donation.txt'

    assert txn.postings[1].meta['receipt'] == 'cash.png rt:2/14'