__pycache__/

import datetime

import functools

import json

class Rate:

    FIELDS = [

        'base',

        'disclaimer',

        'license',

        'rates',

        'timestamp',

    ]

    @classmethod

    def walk_fields(cls, get_field, transform_prefix):

        for fieldname in cls.FIELDS:

            value = get_field(fieldname)

            if value is not None:

                try:

                    transformer = getattr(cls, '{}_{}'.format(transform_prefix, fieldname))

                except AttributeError:

                    pass

                else:

                    value = transformer(value)

            yield (fieldname, value)

    def __init__(self, base, rates, **kwargs):

        for key, value in self.walk_fields(kwargs.get, 'deserialize'):

            setattr(self, key, value)

        self.base = base

        self.rates = rates

    @classmethod

    def deserialize_timestamp(cls, value):

        return datetime.datetime.fromtimestamp(value)

    @classmethod

    def serialize_timestamp(cls, value):

        return int(value.timestamp())

    @classmethod

    def from_json_file(cls, json_file):

        response = json.load(json_file)

        return cls(**response)

    def serialize(self):

        return dict(self.walk_fields(functools.partial(getattr, self), 'serialize'))

import pathlib

TEST_DIR = pathlib.Path(__file__).parent

def relpath(path):

    return TEST_DIR / pathlib.Path(path)

{

    "disclaimer": "https://openexchangerates.org/terms/",

    "license": "https://openexchangerates.org/license/",

    "timestamp": 982342800,

    "base": "USD",

    "rates": {

        "AED": 3.67246,

        "ALL": 144.529793,

        "ANG": 1.79

    }

}

import datetime

import io

import json

from . import relpath

import oxrlib.rate

import pytest

@pytest.fixture

def historical1_rate():

    with open(relpath('historical1.json').as_posix()) as rate_file:

        return oxrlib.rate.Rate.from_json_file(rate_file)

def test_rate_from_json(historical1_rate):

    assert historical1_rate.base == 'USD'

    assert historical1_rate.timestamp == datetime.datetime(2001, 2, 16, 12, 0, 0)

def test_serialize(historical1_rate):

    with open(relpath('historical1.json').as_posix()) as rate_file:

        expected = json.load(rate_file)

    assert expected == historical1_rate.serialize()