osm_common/tests/test_dbmemory.py

# Copyright 2018 Whitestack, LLC
# Copyright 2018 Telefonica S.A.
#
# Licensed under the Apache License, Version 2.0 (the "License"); you may
# not use this file except in compliance with the License. You may obtain
# a copy of the License at
#
#         http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License 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.
#
# For those usages not covered by the Apache License, Version 2.0 please
# contact: esousa@whitestack.com or alfonso.tiernosepulveda@telefonica.com
##

import http
import logging
import pytest
import unittest
from unittest.mock import Mock

from unittest.mock import MagicMock
from osm_common.dbbase import DbException
from osm_common.dbmemory import DbMemory

__author__ = 'Eduardo Sousa <eduardosousa@av.it.pt>'


@pytest.fixture(scope="function", params=[True, False])
def db_memory(request):
    db = DbMemory(lock=request.param)
    return db


@pytest.fixture(scope="function", params=[True, False])
def db_memory_with_data(request):
    db = DbMemory(lock=request.param)

    db.create("test", {"_id": 1, "data": 1})
    db.create("test", {"_id": 2, "data": 2})
    db.create("test", {"_id": 3, "data": 3})

    return db


@pytest.fixture(scope="function")
def db_memory_with_many_data(request):
    db = DbMemory(lock=False)

    db.create_list("test", [
        {"_id": 1, "data": {"data2": {"data3": 1}}, "list": [{"a": 1}], "text": "sometext"},
        {"_id": 2, "data": {"data2": {"data3": 2}}, "list": [{"a": 2}]},
        {"_id": 3, "data": {"data2": {"data3": 3}}, "list": [{"a": 3}]},
        {"_id": 4, "data": {"data2": {"data3": 4}}, "list": [{"a": 4}, {"a": 0}]},
        {"_id": 5, "data": {"data2": {"data3": 5}}, "list": [{"a": 5}]},
        {"_id": 6, "data": {"data2": {"data3": 6}}, "list": [{"0": {"a": 1}}]},
        {"_id": 7, "data": {"data2": {"data3": 7}}, "0": {"a": 0}},
        {"_id": 8, "list": [{"a": 3, "b": 0, "c": [{"a": 3, "b": 1}, {"a": 0, "b": "v"}]}, {"a": 0, "b": 1}]},
    ])
    return db


def empty_exception_message():
    return 'database exception '


def get_one_exception_message(db_filter):
    return "database exception Not found entry with filter='{}'".format(db_filter)


def get_one_multiple_exception_message(db_filter):
    return "database exception Found more than one entry with filter='{}'".format(db_filter)


def del_one_exception_message(db_filter):
    return "database exception Not found entry with filter='{}'".format(db_filter)


def replace_exception_message(value):
    return "database exception Not found entry with _id='{}'".format(value)


def test_constructor():
    db = DbMemory()
    assert db.logger == logging.getLogger('db')
    assert db.db == {}


def test_constructor_with_logger():
    logger_name = 'db_local'
    db = DbMemory(logger_name=logger_name)
    assert db.logger == logging.getLogger(logger_name)
    assert db.db == {}


def test_db_connect():
    logger_name = 'db_local'
    config = {'logger_name': logger_name}
    db = DbMemory()
    db.db_connect(config)
    assert db.logger == logging.getLogger(logger_name)
    assert db.db == {}


def test_db_disconnect(db_memory):
    db_memory.db_disconnect()


@pytest.mark.parametrize("table, db_filter", [
    ("test", {}),
    ("test", {"_id": 1}),
    ("test", {"data": 1}),
    ("test", {"_id": 1, "data": 1})])
def test_get_list_with_empty_db(db_memory, table, db_filter):
    result = db_memory.get_list(table, db_filter)
    assert len(result) == 0


@pytest.mark.parametrize("table, db_filter, expected_data", [
    ("test", {}, [{"_id": 1, "data": 1}, {"_id": 2, "data": 2}, {"_id": 3, "data": 3}]),
    ("test", {"_id": 1}, [{"_id": 1, "data": 1}]),
    ("test", {"data": 1}, [{"_id": 1, "data": 1}]),
    ("test", {"_id": 1, "data": 1}, [{"_id": 1, "data": 1}]),
    ("test", {"_id": 2}, [{"_id": 2, "data": 2}]),
    ("test", {"data": 2}, [{"_id": 2, "data": 2}]),
    ("test", {"_id": 2, "data": 2}, [{"_id": 2, "data": 2}]),
    ("test", {"_id": 4}, []),
    ("test", {"data": 4}, []),
    ("test", {"_id": 4, "data": 4}, []),
    ("test_table", {}, []),
    ("test_table", {"_id": 1}, []),
    ("test_table", {"data": 1}, []),
    ("test_table", {"_id": 1, "data": 1}, [])])
def test_get_list_with_non_empty_db(db_memory_with_data, table, db_filter, expected_data):
    result = db_memory_with_data.get_list(table, db_filter)
    assert len(result) == len(expected_data)
    for data in expected_data:
        assert data in result


def test_get_list_exception(db_memory_with_data):
    table = 'test'
    db_filter = {}
    db_memory_with_data._find = MagicMock(side_effect=Exception())
    with pytest.raises(DbException) as excinfo:
        db_memory_with_data.get_list(table, db_filter)
    assert str(excinfo.value) == empty_exception_message()
    assert excinfo.value.http_code == http.HTTPStatus.NOT_FOUND


@pytest.mark.parametrize("table, db_filter, expected_data", [
    ("test", {"_id": 1}, {"_id": 1, "data": 1}),
    ("test", {"_id": 2}, {"_id": 2, "data": 2}),
    ("test", {"_id": 3}, {"_id": 3, "data": 3}),
    ("test", {"data": 1}, {"_id": 1, "data": 1}),
    ("test", {"data": 2}, {"_id": 2, "data": 2}),
    ("test", {"data": 3}, {"_id": 3, "data": 3}),
    ("test", {"_id": 1, "data": 1}, {"_id": 1, "data": 1}),
    ("test", {"_id": 2, "data": 2}, {"_id": 2, "data": 2}),
    ("test", {"_id": 3, "data": 3}, {"_id": 3, "data": 3})])
def test_get_one(db_memory_with_data, table, db_filter, expected_data):
    result = db_memory_with_data.get_one(table, db_filter)
    assert result == expected_data
    assert len(db_memory_with_data.db) == 1
    assert table in db_memory_with_data.db
    assert len(db_memory_with_data.db[table]) == 3
    assert result in db_memory_with_data.db[table]


@pytest.mark.parametrize("db_filter, expected_ids", [
    ({}, [1, 2, 3, 4, 5, 6, 7, 8]),
    ({"_id": 1}, [1]),
    ({"data.data2.data3": 2}, [2]),
    ({"data.data2.data3.eq": 2}, [2]),
    ({"data.data2.data3.neq": 2}, [1, 3, 4, 5, 6, 7, 8]),
    ({"data.data2.data3": [2, 3]}, [2, 3]),
    ({"data.data2.data3.gt": 4}, [5, 6, 7]),
    ({"data.data2.data3.gte": 4}, [4, 5, 6, 7]),
    ({"data.data2.data3.lt": 4}, [1, 2, 3]),
    ({"data.data2.data3.lte": 4}, [1, 2, 3, 4]),
    ({"data.data2.data3.lte": 4.5}, [1, 2, 3, 4]),
    ({"data.data2.data3.gt": "text"}, []),
    ({"text.eq": "sometext"}, [1]),
    ({"text.neq": "sometext"}, [2, 3, 4, 5, 6, 7, 8]),
    ({"text.eq": "somet"}, []),
    ({"text.gte": "a"}, [1]),
    ({"text.gte": "somet"}, [1]),
    ({"text.gte": "sometext"}, [1]),
    ({"text.lt": "somet"}, []),
    ({"data.data2.data3": 2, "data.data2.data4": None}, [2]),
    ({"data.data2.data3": 2, "data.data2.data4": 5}, []),
    ({"data.data2.data3": 4}, [4]),
    ({"data.data2.data3": [3, 4, "e"]}, [3, 4]),
    ({"data.data2.data3": None}, [8]),
    ({"data.data2": "4"}, []),
    ({"list.0.a": 1}, [1, 6]),
    ({"list.ANYINDEX.a": 1}, [1]),
    ({"list.a": 3, "list.b": 1}, [8]),
    ({"list.ANYINDEX.a": 3, "list.ANYINDEX.b": 1}, []),
    ({"list.ANYINDEX.a": 3, "list.ANYINDEX.c.a": 3}, [8]),
    ({"list.ANYINDEX.a": 3, "list.ANYINDEX.b": 0}, [8]),
    ({"list.ANYINDEX.a": 3, "list.ANYINDEX.c.ANYINDEX.a": 0, "list.ANYINDEX.c.ANYINDEX.b": "v"}, [8]),
    ({"list.ANYINDEX.a": 3, "list.ANYINDEX.c.ANYINDEX.a": 0, "list.ANYINDEX.c.ANYINDEX.b": 1}, []),
    ({"list.c.b": 1}, [8]),
    ({"list.c.b": None}, [1, 2, 3, 4, 5, 6, 7]),
    # ({"data.data2.data3": 4}, []),
    # ({"data.data2.data3": 4}, []),
])
def test_get_list(db_memory_with_many_data, db_filter, expected_ids):
    result = db_memory_with_many_data.get_list("test", db_filter)
    assert isinstance(result, list)
    result_ids = [item["_id"] for item in result]
    assert len(result) == len(expected_ids), "for db_filter={} result={} expected_ids={}".format(db_filter, result,
                                                                                                 result_ids)
    assert result_ids == expected_ids
    for i in range(len(result)):
        assert result[i] in db_memory_with_many_data.db["test"]

    assert len(db_memory_with_many_data.db) == 1
    assert "test" in db_memory_with_many_data.db
    assert len(db_memory_with_many_data.db["test"]) == 8


@pytest.mark.parametrize("table, db_filter, expected_data", [
    ("test", {}, {"_id": 1, "data": 1})])
def test_get_one_with_multiple_results(db_memory_with_data, table, db_filter, expected_data):
    result = db_memory_with_data.get_one(table, db_filter, fail_on_more=False)
    assert result == expected_data
    assert len(db_memory_with_data.db) == 1
    assert table in db_memory_with_data.db
    assert len(db_memory_with_data.db[table]) == 3
    assert result in db_memory_with_data.db[table]


def test_get_one_with_multiple_results_exception(db_memory_with_data):
    table = "test"
    db_filter = {}
    with pytest.raises(DbException) as excinfo:
        db_memory_with_data.get_one(table, db_filter)
    assert str(excinfo.value) == (empty_exception_message() + get_one_multiple_exception_message(db_filter))
    # assert excinfo.value.http_code == http.HTTPStatus.CONFLICT


@pytest.mark.parametrize("table, db_filter", [
    ("test", {"_id": 4}),
    ("test", {"data": 4}),
    ("test", {"_id": 4, "data": 4}),
    ("test_table", {"_id": 4}),
    ("test_table", {"data": 4}),
    ("test_table", {"_id": 4, "data": 4})])
def test_get_one_with_non_empty_db_exception(db_memory_with_data, table, db_filter):
    with pytest.raises(DbException) as excinfo:
        db_memory_with_data.get_one(table, db_filter)
    assert str(excinfo.value) == (empty_exception_message() + get_one_exception_message(db_filter))
    assert excinfo.value.http_code == http.HTTPStatus.NOT_FOUND


@pytest.mark.parametrize("table, db_filter", [
    ("test", {"_id": 4}),
    ("test", {"data": 4}),
    ("test", {"_id": 4, "data": 4}),
    ("test_table", {"_id": 4}),
    ("test_table", {"data": 4}),
    ("test_table", {"_id": 4, "data": 4})])
def test_get_one_with_non_empty_db_none(db_memory_with_data, table, db_filter):
    result = db_memory_with_data.get_one(table, db_filter, fail_on_empty=False)
    assert result is None


@pytest.mark.parametrize("table, db_filter", [
    ("test", {"_id": 4}),
    ("test", {"data": 4}),
    ("test", {"_id": 4, "data": 4}),
    ("test_table", {"_id": 4}),
    ("test_table", {"data": 4}),
    ("test_table", {"_id": 4, "data": 4})])
def test_get_one_with_empty_db_exception(db_memory, table, db_filter):
    with pytest.raises(DbException) as excinfo:
        db_memory.get_one(table, db_filter)
    assert str(excinfo.value) == (empty_exception_message() + get_one_exception_message(db_filter))
    assert excinfo.value.http_code == http.HTTPStatus.NOT_FOUND


@pytest.mark.parametrize("table, db_filter", [
    ("test", {"_id": 4}),
    ("test", {"data": 4}),
    ("test", {"_id": 4, "data": 4}),
    ("test_table", {"_id": 4}),
    ("test_table", {"data": 4}),
    ("test_table", {"_id": 4, "data": 4})])
def test_get_one_with_empty_db_none(db_memory, table, db_filter):
    result = db_memory.get_one(table, db_filter, fail_on_empty=False)
    assert result is None


def test_get_one_generic_exception(db_memory_with_data):
    table = 'test'
    db_filter = {}
    db_memory_with_data._find = MagicMock(side_effect=Exception())
    with pytest.raises(DbException) as excinfo:
        db_memory_with_data.get_one(table, db_filter)
    assert str(excinfo.value) == empty_exception_message()
    assert excinfo.value.http_code == http.HTTPStatus.NOT_FOUND


@pytest.mark.parametrize("table, db_filter, expected_data", [
    ("test", {}, []),
    ("test", {"_id": 1}, [{"_id": 2, "data": 2}, {"_id": 3, "data": 3}]),
    ("test", {"_id": 2}, [{"_id": 1, "data": 1}, {"_id": 3, "data": 3}]),
    ("test", {"_id": 1, "data": 1}, [{"_id": 2, "data": 2}, {"_id": 3, "data": 3}]),
    ("test", {"_id": 2, "data": 2}, [{"_id": 1, "data": 1}, {"_id": 3, "data": 3}])])
def test_del_list_with_non_empty_db(db_memory_with_data, table, db_filter, expected_data):
    result = db_memory_with_data.del_list(table, db_filter)
    assert result["deleted"] == (3 - len(expected_data))
    assert len(db_memory_with_data.db) == 1
    assert table in db_memory_with_data.db
    assert len(db_memory_with_data.db[table]) == len(expected_data)
    for data in expected_data:
        assert data in db_memory_with_data.db[table]


@pytest.mark.parametrize("table, db_filter", [
    ("test", {}),
    ("test", {"_id": 1}),
    ("test", {"_id": 2}),
    ("test", {"data": 1}),
    ("test", {"data": 2}),
    ("test", {"_id": 1, "data": 1}),
    ("test", {"_id": 2, "data": 2})])
def test_del_list_with_empty_db(db_memory, table, db_filter):
    result = db_memory.del_list(table, db_filter)
    assert result['deleted'] == 0


def test_del_list_generic_exception(db_memory_with_data):
    table = 'test'
    db_filter = {}
    db_memory_with_data._find = MagicMock(side_effect=Exception())
    with pytest.raises(DbException) as excinfo:
        db_memory_with_data.del_list(table, db_filter)
    assert str(excinfo.value) == empty_exception_message()
    assert excinfo.value.http_code == http.HTTPStatus.NOT_FOUND


@pytest.mark.parametrize("table, db_filter, data", [
    ("test", {}, {"_id": 1, "data": 1}),
    ("test", {"_id": 1}, {"_id": 1, "data": 1}),
    ("test", {"data": 1}, {"_id": 1, "data": 1}),
    ("test", {"_id": 1, "data": 1}, {"_id": 1, "data": 1}),
    ("test", {"_id": 2}, {"_id": 2, "data": 2}),
    ("test", {"data": 2}, {"_id": 2, "data": 2}),
    ("test", {"_id": 2, "data": 2}, {"_id": 2, "data": 2})])
def test_del_one(db_memory_with_data, table, db_filter, data):
    result = db_memory_with_data.del_one(table, db_filter)
    assert result == {"deleted": 1}
    assert len(db_memory_with_data.db) == 1
    assert table in db_memory_with_data.db
    assert len(db_memory_with_data.db[table]) == 2
    assert data not in db_memory_with_data.db[table]


@pytest.mark.parametrize("table, db_filter", [
    ("test", {}),
    ("test", {"_id": 1}),
    ("test", {"_id": 2}),
    ("test", {"data": 1}),
    ("test", {"data": 2}),
    ("test", {"_id": 1, "data": 1}),
    ("test", {"_id": 2, "data": 2}),
    ("test_table", {}),
    ("test_table", {"_id": 1}),
    ("test_table", {"_id": 2}),
    ("test_table", {"data": 1}),
    ("test_table", {"data": 2}),
    ("test_table", {"_id": 1, "data": 1}),
    ("test_table", {"_id": 2, "data": 2})])
def test_del_one_with_empty_db_exception(db_memory, table, db_filter):
    with pytest.raises(DbException) as excinfo:
        db_memory.del_one(table, db_filter)
    assert str(excinfo.value) == (empty_exception_message() + del_one_exception_message(db_filter))
    assert excinfo.value.http_code == http.HTTPStatus.NOT_FOUND


@pytest.mark.parametrize("table, db_filter", [
    ("test", {}),
    ("test", {"_id": 1}),
    ("test", {"_id": 2}),
    ("test", {"data": 1}),
    ("test", {"data": 2}),
    ("test", {"_id": 1, "data": 1}),
    ("test", {"_id": 2, "data": 2}),
    ("test_table", {}),
    ("test_table", {"_id": 1}),
    ("test_table", {"_id": 2}),
    ("test_table", {"data": 1}),
    ("test_table", {"data": 2}),
    ("test_table", {"_id": 1, "data": 1}),
    ("test_table", {"_id": 2, "data": 2})])
def test_del_one_with_empty_db_none(db_memory, table, db_filter):
    result = db_memory.del_one(table, db_filter, fail_on_empty=False)
    assert result is None


@pytest.mark.parametrize("table, db_filter", [
    ("test", {"_id": 4}),
    ("test", {"_id": 5}),
    ("test", {"data": 4}),
    ("test", {"data": 5}),
    ("test", {"_id": 1, "data": 2}),
    ("test", {"_id": 2, "data": 3}),
    ("test_table", {}),
    ("test_table", {"_id": 1}),
    ("test_table", {"_id": 2}),
    ("test_table", {"data": 1}),
    ("test_table", {"data": 2}),
    ("test_table", {"_id": 1, "data": 1}),
    ("test_table", {"_id": 2, "data": 2})])
def test_del_one_with_non_empty_db_exception(db_memory_with_data, table, db_filter):
    with pytest.raises(DbException) as excinfo:
        db_memory_with_data.del_one(table, db_filter)
    assert str(excinfo.value) == (empty_exception_message() + del_one_exception_message(db_filter))
    assert excinfo.value.http_code == http.HTTPStatus.NOT_FOUND


@pytest.mark.parametrize("table, db_filter", [
    ("test", {"_id": 4}),
    ("test", {"_id": 5}),
    ("test", {"data": 4}),
    ("test", {"data": 5}),
    ("test", {"_id": 1, "data": 2}),
    ("test", {"_id": 2, "data": 3}),
    ("test_table", {}),
    ("test_table", {"_id": 1}),
    ("test_table", {"_id": 2}),
    ("test_table", {"data": 1}),
    ("test_table", {"data": 2}),
    ("test_table", {"_id": 1, "data": 1}),
    ("test_table", {"_id": 2, "data": 2})])
def test_del_one_with_non_empty_db_none(db_memory_with_data, table, db_filter):
    result = db_memory_with_data.del_one(table, db_filter, fail_on_empty=False)
    assert result is None


@pytest.mark.parametrize("fail_on_empty", [
    (True),
    (False)])
def test_del_one_generic_exception(db_memory_with_data, fail_on_empty):
    table = 'test'
    db_filter = {}
    db_memory_with_data._find = MagicMock(side_effect=Exception())
    with pytest.raises(DbException) as excinfo:
        db_memory_with_data.del_one(table, db_filter, fail_on_empty=fail_on_empty)
    assert str(excinfo.value) == empty_exception_message()
    assert excinfo.value.http_code == http.HTTPStatus.NOT_FOUND


@pytest.mark.parametrize("table, _id, indata", [
    ("test", 1, {"_id": 1, "data": 42}),
    ("test", 1, {"_id": 1, "data": 42, "kk": 34}),
    ("test", 1, {"_id": 1}),
    ("test", 2, {"_id": 2, "data": 42}),
    ("test", 2, {"_id": 2, "data": 42, "kk": 34}),
    ("test", 2, {"_id": 2}),
    ("test", 3, {"_id": 3, "data": 42}),
    ("test", 3, {"_id": 3, "data": 42, "kk": 34}),
    ("test", 3, {"_id": 3})])
def test_replace(db_memory_with_data, table, _id, indata):
    result = db_memory_with_data.replace(table, _id, indata)
    assert result == {"updated": 1}
    assert len(db_memory_with_data.db) == 1
    assert table in db_memory_with_data.db
    assert len(db_memory_with_data.db[table]) == 3
    assert indata in db_memory_with_data.db[table]


@pytest.mark.parametrize("table, _id, indata", [
    ("test", 1, {"_id": 1, "data": 42}),
    ("test", 2, {"_id": 2}),
    ("test", 3, {"_id": 3})])
def test_replace_without_data_exception(db_memory, table, _id, indata):
    with pytest.raises(DbException) as excinfo:
        db_memory.replace(table, _id, indata, fail_on_empty=True)
    assert str(excinfo.value) == (replace_exception_message(_id))
    assert excinfo.value.http_code == http.HTTPStatus.NOT_FOUND


@pytest.mark.parametrize("table, _id, indata", [
    ("test", 1, {"_id": 1, "data": 42}),
    ("test", 2, {"_id": 2}),
    ("test", 3, {"_id": 3})])
def test_replace_without_data_none(db_memory, table, _id, indata):
    result = db_memory.replace(table, _id, indata, fail_on_empty=False)
    assert result is None


@pytest.mark.parametrize("table, _id, indata", [
    ("test", 11, {"_id": 11, "data": 42}),
    ("test", 12, {"_id": 12}),
    ("test", 33, {"_id": 33})])
def test_replace_with_data_exception(db_memory_with_data, table, _id, indata):
    with pytest.raises(DbException) as excinfo:
        db_memory_with_data.replace(table, _id, indata, fail_on_empty=True)
    assert str(excinfo.value) == (replace_exception_message(_id))
    assert excinfo.value.http_code == http.HTTPStatus.NOT_FOUND


@pytest.mark.parametrize("table, _id, indata", [
    ("test", 11, {"_id": 11, "data": 42}),
    ("test", 12, {"_id": 12}),
    ("test", 33, {"_id": 33})])
def test_replace_with_data_none(db_memory_with_data, table, _id, indata):
    result = db_memory_with_data.replace(table, _id, indata, fail_on_empty=False)
    assert result is None


@pytest.mark.parametrize("fail_on_empty", [
    True,
    False])
def test_replace_generic_exception(db_memory_with_data, fail_on_empty):
    table = 'test'
    _id = {}
    indata = {'_id': 1, 'data': 1}
    db_memory_with_data._find = MagicMock(side_effect=Exception())
    with pytest.raises(DbException) as excinfo:
        db_memory_with_data.replace(table, _id, indata, fail_on_empty=fail_on_empty)
    assert str(excinfo.value) == empty_exception_message()
    assert excinfo.value.http_code == http.HTTPStatus.NOT_FOUND


@pytest.mark.parametrize("table, id, data", [
    ("test", "1", {"data": 1}),
    ("test", "1", {"data": 2}),
    ("test", "2", {"data": 1}),
    ("test", "2", {"data": 2}),
    ("test_table", "1", {"data": 1}),
    ("test_table", "1", {"data": 2}),
    ("test_table", "2", {"data": 1}),
    ("test_table", "2", {"data": 2}),
    ("test", "1", {"data_1": 1, "data_2": 2}),
    ("test", "1", {"data_1": 2, "data_2": 1}),
    ("test", "2", {"data_1": 1, "data_2": 2}),
    ("test", "2", {"data_1": 2, "data_2": 1}),
    ("test_table", "1", {"data_1": 1, "data_2": 2}),
    ("test_table", "1", {"data_1": 2, "data_2": 1}),
    ("test_table", "2", {"data_1": 1, "data_2": 2}),
    ("test_table", "2", {"data_1": 2, "data_2": 1})])
def test_create_with_empty_db_with_id(db_memory, table, id, data):
    data_to_insert = data
    data_to_insert['_id'] = id
    returned_id = db_memory.create(table, data_to_insert)
    assert returned_id == id
    assert len(db_memory.db) == 1
    assert table in db_memory.db
    assert len(db_memory.db[table]) == 1
    assert data_to_insert in db_memory.db[table]


@pytest.mark.parametrize("table, id, data", [
    ("test", "4", {"data": 1}),
    ("test", "5", {"data": 2}),
    ("test", "4", {"data": 1}),
    ("test", "5", {"data": 2}),
    ("test_table", "4", {"data": 1}),
    ("test_table", "5", {"data": 2}),
    ("test_table", "4", {"data": 1}),
    ("test_table", "5", {"data": 2}),
    ("test", "4", {"data_1": 1, "data_2": 2}),
    ("test", "5", {"data_1": 2, "data_2": 1}),
    ("test", "4", {"data_1": 1, "data_2": 2}),
    ("test", "5", {"data_1": 2, "data_2": 1}),
    ("test_table", "4", {"data_1": 1, "data_2": 2}),
    ("test_table", "5", {"data_1": 2, "data_2": 1}),
    ("test_table", "4", {"data_1": 1, "data_2": 2}),
    ("test_table", "5", {"data_1": 2, "data_2": 1})])
def test_create_with_non_empty_db_with_id(db_memory_with_data, table, id, data):
    data_to_insert = data
    data_to_insert['_id'] = id
    returned_id = db_memory_with_data.create(table, data_to_insert)
    assert returned_id == id
    assert len(db_memory_with_data.db) == (1 if table == 'test' else 2)
    assert table in db_memory_with_data.db
    assert len(db_memory_with_data.db[table]) == (4 if table == 'test' else 1)
    assert data_to_insert in db_memory_with_data.db[table]


@pytest.mark.parametrize("table, data", [
    ("test", {"data": 1}),
    ("test", {"data": 2}),
    ("test", {"data": 1}),
    ("test", {"data": 2}),
    ("test_table", {"data": 1}),
    ("test_table", {"data": 2}),
    ("test_table", {"data": 1}),
    ("test_table", {"data": 2}),
    ("test", {"data_1": 1, "data_2": 2}),
    ("test", {"data_1": 2, "data_2": 1}),
    ("test", {"data_1": 1, "data_2": 2}),
    ("test", {"data_1": 2, "data_2": 1}),
    ("test_table", {"data_1": 1, "data_2": 2}),
    ("test_table", {"data_1": 2, "data_2": 1}),
    ("test_table", {"data_1": 1, "data_2": 2}),
    ("test_table", {"data_1": 2, "data_2": 1})])
def test_create_with_empty_db_without_id(db_memory, table, data):
    returned_id = db_memory.create(table, data)
    assert len(db_memory.db) == 1
    assert table in db_memory.db
    assert len(db_memory.db[table]) == 1
    data_inserted = data
    data_inserted['_id'] = returned_id
    assert data_inserted in db_memory.db[table]


@pytest.mark.parametrize("table, data", [
    ("test", {"data": 1}),
    ("test", {"data": 2}),
    ("test", {"data": 1}),
    ("test", {"data": 2}),
    ("test_table", {"data": 1}),
    ("test_table", {"data": 2}),
    ("test_table", {"data": 1}),
    ("test_table", {"data": 2}),
    ("test", {"data_1": 1, "data_2": 2}),
    ("test", {"data_1": 2, "data_2": 1}),
    ("test", {"data_1": 1, "data_2": 2}),
    ("test", {"data_1": 2, "data_2": 1}),
    ("test_table", {"data_1": 1, "data_2": 2}),
    ("test_table", {"data_1": 2, "data_2": 1}),
    ("test_table", {"data_1": 1, "data_2": 2}),
    ("test_table", {"data_1": 2, "data_2": 1})])
def test_create_with_non_empty_db_without_id(db_memory_with_data, table, data):
    returned_id = db_memory_with_data.create(table, data)
    assert len(db_memory_with_data.db) == (1 if table == 'test' else 2)
    assert table in db_memory_with_data.db
    assert len(db_memory_with_data.db[table]) == (4 if table == 'test' else 1)
    data_inserted = data
    data_inserted['_id'] = returned_id
    assert data_inserted in db_memory_with_data.db[table]


def test_create_with_exception(db_memory):
    table = "test"
    data = {"_id": 1, "data": 1}
    db_memory.db = MagicMock()
    db_memory.db.__contains__.side_effect = Exception()
    with pytest.raises(DbException) as excinfo:
        db_memory.create(table, data)
    assert str(excinfo.value) == empty_exception_message()
    assert excinfo.value.http_code == http.HTTPStatus.NOT_FOUND


@pytest.mark.parametrize("db_content, update_dict, expected, message", [
    ({"a": {"none": None}}, {"a.b.num": "v"}, {"a": {"none": None, "b": {"num": "v"}}}, "create dict"),
    ({"a": {"none": None}}, {"a.none.num": "v"}, {"a": {"none": {"num": "v"}}}, "create dict over none"),
    ({"a": {"b": {"num": 4}}}, {"a.b.num": "v"}, {"a": {"b": {"num": "v"}}}, "replace_number"),
    ({"a": {"b": {"num": 4}}}, {"a.b.num.c.d": "v"}, None, "create dict over number should fail"),
    ({"a": {"b": {"num": 4}}}, {"a.b": "v"}, {"a": {"b": "v"}}, "replace dict with a string"),
    ({"a": {"b": {"num": 4}}}, {"a.b": None}, {"a": {"b": None}}, "replace dict with None"),
    ({"a": [{"b": {"num": 4}}]}, {"a.b.num": "v"}, None, "create dict over list should fail"),
    ({"a": [{"b": {"num": 4}}]}, {"a.0.b.num": "v"}, {"a": [{"b": {"num": "v"}}]}, "set list"),
    ({"a": [{"b": {"num": 4}}]}, {"a.3.b.num": "v"},
     {"a": [{"b": {"num": 4}}, None, None, {"b": {"num": "v"}}]}, "expand list"),
    ({"a": [[4]]}, {"a.0.0": "v"}, {"a": [["v"]]}, "set nested list"),
    ({"a": [[4]]}, {"a.0.2": "v"}, {"a": [[4, None, "v"]]}, "expand nested list"),
    ({"a": [[4]]}, {"a.2.2": "v"}, {"a": [[4], None, {"2": "v"}]}, "expand list and add number key")])
def test_set_one(db_memory, db_content, update_dict, expected, message):
    db_memory._find = Mock(return_value=((0, db_content), ))
    if expected is None:
        with pytest.raises(DbException) as excinfo:
            db_memory.set_one("table", {}, update_dict)
        assert (excinfo.value.http_code == http.HTTPStatus.NOT_FOUND), message
    else:
        db_memory.set_one("table", {}, update_dict)
        assert (db_content == expected), message


class TestDbMemory(unittest.TestCase):
    # TODO to delete. This is cover with pytest test_set_one.
    def test_set_one(self):
        test_set = (
            # (database content, set-content, expected database content (None=fails), message)
            ({"a": {"none": None}}, {"a.b.num": "v"}, {"a": {"none": None, "b": {"num": "v"}}}, "create dict"),
            ({"a": {"none": None}}, {"a.none.num": "v"}, {"a": {"none": {"num": "v"}}}, "create dict over none"),
            ({"a": {"b": {"num": 4}}}, {"a.b.num": "v"}, {"a": {"b": {"num": "v"}}}, "replace_number"),
            ({"a": {"b": {"num": 4}}}, {"a.b.num.c.d": "v"}, None, "create dict over number should fail"),
            ({"a": {"b": {"num": 4}}}, {"a.b": "v"}, {"a": {"b": "v"}}, "replace dict with a string"),
            ({"a": {"b": {"num": 4}}}, {"a.b": None}, {"a": {"b": None}}, "replace dict with None"),

            ({"a": [{"b": {"num": 4}}]}, {"a.b.num": "v"}, None, "create dict over list should fail"),
            ({"a": [{"b": {"num": 4}}]}, {"a.0.b.num": "v"}, {"a": [{"b": {"num": "v"}}]}, "set list"),
            ({"a": [{"b": {"num": 4}}]}, {"a.3.b.num": "v"},
             {"a": [{"b": {"num": 4}}, None, None, {"b": {"num": "v"}}]}, "expand list"),
            ({"a": [[4]]}, {"a.0.0": "v"}, {"a": [["v"]]}, "set nested list"),
            ({"a": [[4]]}, {"a.0.2": "v"}, {"a": [[4, None, "v"]]}, "expand nested list"),
            ({"a": [[4]]}, {"a.2.2": "v"}, {"a": [[4], None, {"2": "v"}]}, "expand list and add number key"),
        )
        db_men = DbMemory()
        db_men._find = Mock()
        for db_content, update_dict, expected, message in test_set:
            db_men._find.return_value = ((0, db_content), )
            if expected is None:
                self.assertRaises(DbException, db_men.set_one, "table", {}, update_dict)
            else:
                db_men.set_one("table", {}, update_dict)
                self.assertEqual(db_content, expected, message)