import unittest


def humanbytes(bytes: int) -> str:
    """non-localized conversion of bytes to human readable strings"""
    powers = {0: 'bytes', 1: 'KB', 2: 'MB', 3: 'GB', 4: 'TB', 5: 'PB', 6: 'EB'}
    power = 1
    result = "%d bytes" % bytes
    while bytes >= 1024 ** power and power in powers:
        result = "%.3f" % (bytes / (1024 ** power))
        result = result.rstrip("0")
        result = result.rstrip(".")
        result = result + " " + powers[power]
        power = power + 1
    return result


class TestLogFileModel(unittest.TestCase):

    def test_humanbytes(self):
        inputs = {
            0: "0 bytes",
            1023: "1023 bytes",
            1024: "1 KB",
            1048575: "1023.999 KB",
            1048576: "1 MB",
        }
        for input in inputs.keys():
            actual = humanbytes(input)
            self.assertEqual(inputs[input], actual)