Function test_number

python/ccxt/test/base/test_number.py:27–342

()

from ccxt.base.precise import Precise  # noqa E402

def test_number():
    exchange = ccxt.Exchange({
        'id': 'regirock',
    })
    # ----------------------------------------------------------------------------
    # numberToString
    assert exchange.number_to_string(-7.8e-7) == '-0.00000078'
    assert exchange.number_to_string(7.8e-7) == '0.00000078'
    assert exchange.number_to_string(-0.0000017805) == '-0.0000017805'
    assert exchange.number_to_string(0.0000017805) == '0.0000017805'
    assert exchange.number_to_string(-7.0005e+27) == '-7000500000000000000000000000'
    assert exchange.number_to_string(7.0005e+27) == '7000500000000000000000000000'
    assert exchange.number_to_string(-7.9e+27) == '-7900000000000000000000000000'
    assert exchange.number_to_string(7e+27) == '7000000000000000000000000000'
    assert exchange.number_to_string(7.9e+27) == '7900000000000000000000000000'
    assert exchange.number_to_string(-12.345) == '-12.345'
    assert exchange.number_to_string(12.345) == '12.345'
    assert exchange.number_to_string(0) == '0'
    assert exchange.number_to_string(7.35946e+21) == '7359460000000000000000'
    assert exchange.number_to_string(1e-8) == '0.00000001'
    assert exchange.number_to_string(1e-7) == '0.0000001'
    assert exchange.number_to_string(-1e-7) == '-0.0000001'
    # ----------------------------------------------------------------------------
    # testDecimalToPrecisionTruncationToNDigitsAfterDot
    assert exchange.decimal_to_precision('12.3456000', TRUNCATE, 100, DECIMAL_PLACES) == '12.3456'
    assert exchange.decimal_to_precision('12.3456', TRUNCATE, 100, DECIMAL_PLACES) == '12.3456'
    assert exchange.decimal_to_precision('12.3456', TRUNCATE, 4, DECIMAL_PLACES) == '12.3456'
    assert exchange.decimal_to_precision('12.3456', TRUNCATE, 3, DECIMAL_PLACES) == '12.345'
    assert exchange.decimal_to_precision('12.3456', TRUNCATE, 2, DECIMAL_PLACES) == '12.34'
    assert exchange.decimal_to_precision('12.3456', TRUNCATE, 1, DECIMAL_PLACES) == '12.3'
    assert exchange.decimal_to_precision('12.3456', TRUNCATE, 0, DECIMAL_PLACES) == '12'
    # ['12.3456',    TRUNCATE,  -1, DECIMAL_PLACES,  '10'],   # not yet supported
    # ['123.456',    TRUNCATE,  -2, DECIMAL_PLACES,  '120'],  # not yet supported
    # ['123.456',    TRUNCATE,  -3, DECIMAL_PLACES,  '100'],  # not yet supported
    assert exchange.decimal_to_precision('0.0000001', TRUNCATE, 8, DECIMAL_PLACES) == '0.0000001'
    assert exchange.decimal_to_precision('0.00000001', TRUNCATE, 8, DECIMAL_PLACES) == '0.00000001'
    assert exchange.decimal_to_precision('0.000000000', TRUNCATE, 9, DECIMAL_PLACES, PAD_WITH_ZERO) == '0.000000000'
    assert exchange.decimal_to_precision('0.000000001', TRUNCATE, 9, DECIMAL_PLACES, PAD_WITH_ZERO) == '0.000000001'
    assert exchange.decimal_to_precision('12.3456', TRUNCATE, -1, DECIMAL_PLACES) == '10'
    assert exchange.decimal_to_precision('123.456', TRUNCATE, -1, DECIMAL_PLACES) == '120'
    assert exchange.decimal_to_precision('123.456', TRUNCATE, -2, DECIMAL_PLACES) == '100'
    assert exchange.decimal_to_precision('9.99999', TRUNCATE, -1, DECIMAL_PLACES) == '0'
    assert exchange.decimal_to_precision('99.9999', TRUNCATE, -1, DECIMAL_PLACES) == '90'
    assert exchange.decimal_to_precision('99.9999', TRUNCATE, -2, DECIMAL_PLACES) == '0'
    assert exchange.decimal_to_precision('0', TRUNCATE, 0, DECIMAL_PLACES) == '0'
    assert exchange.decimal_to_precision('-0.9', TRUNCATE, 0, DECIMAL_PLACES) == '0'
    # ----------------------------------------------------------------------------
    # testDecimalToPrecisionTruncationToNSignificantDigits
    assert exchange.decimal_to_precision('0.000123456700', TRUNCATE, 100, SIGNIFICANT_DIGITS) == '0.0001234567'
    assert exchange.decimal_to_precision('0.0001234567', TRUNCATE, 100, SIGNIFICANT_DIGITS) == '0.0001234567'
    assert exchange.decimal_to_precision('0.0001234567', TRUNCATE, 7, SIGNIFICANT_DIGITS) == '0.0001234567'
    assert exchange.decimal_to_precision('0.000123456', TRUNCATE, 6, SIGNIFICANT_DIGITS) == '0.000123456'
    assert exchange.decimal_to_precision('0.000123456', TRUNCATE, 5, SIGNIFICANT_DIGITS) == '0.00012345'
    assert exchange.decimal_to_precision('0.000123456', TRUNCATE, 2, SIGNIFICANT_DIGITS) == '0.00012'
    assert exchange.decimal_to_precision('0.000123456', TRUNCATE, 1, SIGNIFICANT_DIGITS) == '0.0001'
    assert exchange.decimal_to_precision('123.0000987654', TRUNCATE, 10, SIGNIFICANT_DIGITS, PAD_WITH_ZERO) == '123.0000987'
    assert exchange.decimal_to_precision('123.0000987654', TRUNCATE, 8, SIGNIFICANT_DIGITS) == '123.00009'
    assert exchange.decimal_to_precision('123.0000987654', TRUNCATE, 7, SIGNIFICANT_DIGITS, PAD_WITH_ZERO) == '123.0000'