''' Tests for ordr2.models.meta '''

import pytest


# tests for JsonEncoder

def test_json_encoder_bind_value():
    ''' test encoding to database for a given value '''
    from ordr2.models.meta import JsonEncoder

    encoder = JsonEncoder()
    result = encoder.process_bind_param({'a': 'b'}, None)

    assert result == '{"a": "b"}'


def test_json_encoder_bind_none():
    ''' test encoding to database if the given value is None '''
    from ordr2.models.meta import JsonEncoder

    encoder = JsonEncoder()
    result = encoder.process_bind_param(None, None)

    assert result is None


def test_json_encoder_result_value():
    ''' test encoding from database for a stored value '''
    from ordr2.models.meta import JsonEncoder

    json_string = '{"a": "b"}'
    encoder = JsonEncoder()
    result = encoder.process_result_value(json_string, None)

    assert result == {'a': 'b'}


def test_json_encoder_result_none():
    ''' test encoding from database if the stored value is None '''
    from ordr2.models.meta import JsonEncoder

    encoder = JsonEncoder()
    result = encoder.process_result_value(None, None)

    assert result is None