testing babel vs icu number formatting

babel_icu_test.py

def test_number_pattern_spec_examples():
    pattern = u'@@@'
    assert numbers.format_decimal(12345, pattern) == u'12300'
    assert numbers.format_decimal(0.12345, pattern) == u'0.123'
    assert numbers.format_decimal(3.14159, u'@@##') == u'3.142'
    assert numbers.format_decimal(1.23004, u'@@##') == u'1.23'

SCIENTIFICSTYLE = 3
CURRENCYSTYLE = 1
PERCENTSTYLE = 2
NUMBERSTYLE = 0

FORMAT_FUNCTIONS = {
    NUMBERSTYLE: numbers.format_decimal,
    CURRENCYSTYLE: numbers.format_currency,
    PERCENTSTYLE: numbers.format_percent,
    SCIENTIFICSTYLE: numbers.format_scientific,
}

BIG_DEC = "bigdec"
DOUBLE = "double"
INT = "int"


def test_icu_data():
    with open('/media/benselme/data/babtest.json') as data_file:
        data = json.load(data_file)
    numformat_data = data['NumberFormat']
    values = numformat_data['values']
    values[BIG_DEC] = decimal.Decimal(values[BIG_DEC])
    values[DOUBLE] = float(values[DOUBLE])
    values[INT] = int(values[INT])
    errors = []

    locales = numformat_data['locales']
    for locale, locale_data in locales.items():
        for style, style_data in locale_data.items():
            style = int(style)
            if style == SCIENTIFICSTYLE:
                continue
            format_fn = FORMAT_FUNCTIONS[int(style)]
            for val_type, icu_formatted_val in style_data.items():
                if style == CURRENCYSTYLE:
                    babel_formatted = numbers.format_currency(
                        values[val_type], icu_formatted_val['currency'],
                        locale=locale, decimal_quantization=True)
                    icu_formatted_val = icu_formatted_val['value']
                else:
                    babel_formatted = format_fn(
                        values[val_type], locale=locale,
                        decimal_quantization=True)
                if babel_formatted != icu_formatted_val:
                    errors.append(
                        f'Differs from ICU {locale}-{style}-{val_type}\n'
                        f'ICU: "{icu_formatted_val}"\n'
                        f'Babel:"{babel_formatted}"'
                    )
    if errors:
        assert False, '\n'.join(errors) + f'\n {len(errors)}'