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# -*- coding: utf-8 -*-
# The MIT License (MIT)
#
# Copyright © 2014 Tim Bielawa <timbielawa@gmail.com>
#
# Permission is hereby granted, free of charge, to any person
# obtaining a copy of this software and associated documentation files
# (the "Software"), to deal in the Software without restriction,
# including without limitation the rights to use, copy, modify, merge,
# publish, distribute, sublicense, and/or sell copies of the Software,
# and to permit persons to whom the Software is furnished to do so,
# subject to the following conditions:
#
# The above copyright notice and this permission notice shall be
# included in all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
# EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
# MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
# NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
# BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
# ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
# CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
# SOFTWARE.
"""
Test for basic math operations
"""
from . import TestCase
import bitmath
class TestBasicMath(TestCase):
def setUp(self):
self.kib_in_bytes = 1024
self.kib_in_bits = 8192
def test_type_raw_int_equality(self):
"""A bitmath type is equal to the value it's instanted with"""
kib = bitmath.KiB(1)
self.assertEqual(kib, 1)
def test_same_bitmath_types_equality(self):
"""Two same bitmath types are equal"""
self.assertEqual(bitmath.KiB(1), bitmath.KiB(1))
def test_different_bitmath_types_equality(self):
"""Two different bitmath types are equal"""
self.assertEqual(bitmath.KiB(1), bitmath.Byte(self.kib_in_bytes))
def test_add_same_type_equal_same_type(self):
"""Adding the same bitmath types is equal to result as the same type"""
kib1 = bitmath.KiB(1)
kib2 = bitmath.KiB(1)
added_two_kib = kib1 + kib2
two_kib = bitmath.KiB(2)
self.assertEqual(added_two_kib, two_kib)
def test_add_different_types_equal_bitmath_type(self):
"""Adding two different bitmath types is equal to another type of the same size"""
# One Kibibyte + 1024 Bytes = 2048 bytes = Byte(2048)
kib1 = bitmath.KiB(1)
byte1 = bitmath.Byte(1024)
added_different_types = kib1 + byte1
two_kib_in_bytes = bitmath.Byte(2048)
self.assertEqual(added_different_types, two_kib_in_bytes)
def test_adding_with_different_base_units(self):
"""Adding a bit based type with a byte based type"""
kib_sized_bit_from_bytes = bitmath.Bit(self.kib_in_bits)
kib = bitmath.KiB(1)
added = kib_sized_bit_from_bytes + kib
two_kib = bitmath.KiB(2)
self.assertEqual(added, two_kib)
def test_subtracting_with_different_base_units(self):
"""Subtracting a bit based type with a byte based type"""
kib_sized_bit_from_bytes = bitmath.Bit(self.kib_in_bits)
kib = bitmath.KiB(1)
subtracted = kib_sized_bit_from_bytes - kib
zero_kib = bitmath.KiB(0)
self.assertEqual(subtracted, zero_kib)
def test_absolute_positive_value(self):
"""abs(PositiveObject) is positive"""
self.assertEqual(bitmath.KiB(1), abs(bitmath.KiB(1)))
def test_absolute_negative_value(self):
"""abs(NegativeObject) is positive"""
self.assertEqual(bitmath.KiB(1), abs(bitmath.KiB(-1)))
def test_inversion_to_negative(self):
"""Negating a positive makes a negative"""
self.assertEqual(bitmath.KiB(-1), -bitmath.KiB(1))
def test_inversion_to_positive(self):
"""Plus'ing a negative makes a positive"""
self.assertEqual(bitmath.KiB(1), +bitmath.KiB(-1))
##################################################################
# add
def bitmath_add_bitmath_is_bitmath(self):
"""bitmath + bitmath = bitmath"""
bm1 = bitmath.KiB(1)
bm2 = bitmath.KiB(2)
result = bm1 + bm2
self.assertEqual(result, bitmath.KiB(3))
self.assertIs(type(result), bitmath.Byte)
def test_bitmath_add_number_is_number(self):
"""bitmath + number = number"""
bm1 = bitmath.KiB(1)
num1 = 2
result = bm1 + num1
self.assertEqual(result, 3.0)
self.assertIs(type(result), float)
def test_number_add_bitmath_is_number(self):
"""number + bitmath = number"""
num1 = 2
bm1 = bitmath.KiB(1)
result = num1 + bm1
self.assertEqual(result, 3.0)
self.assertIs(type(result), float)
##################################################################
# sub
def test_bitmath_sub_bitmath_is_bitmath(self):
"""bitmath - bitmath = bitmath"""
bm1 = bitmath.KiB(1)
bm2 = bitmath.KiB(2)
result = bm1 - bm2
self.assertEqual(result, bitmath.KiB(-1))
self.assertIs(type(result), bitmath.KiB)
def test_bitmath_sub_number_is_number(self):
"""bitmath - number = number"""
bm1 = bitmath.KiB(1)
num1 = 2
result = bm1 - num1
self.assertEqual(result, -1.0)
self.assertIs(type(result), float)
def test_number_sub_bitmath_is_number(self):
"""number - bitmath = number"""
num1 = 2
bm1 = bitmath.KiB(1)
result = num1 - bm1
self.assertEqual(result, 1.0)
self.assertIs(type(result), float)
##################################################################
# mul
def test_bitmath_mul_bitmath_is_bitmath(self):
"""bitmath * bitmath = bitmath"""
bm1 = bitmath.KiB(1)
bm2 = bitmath.KiB(2)
result = bm1 * bm2
self.assertEqual(result, bitmath.KiB(2048.0))
self.assertIs(type(result), bitmath.KiB)
def test_bitmath_mul_number_is_bitmath(self):
"""bitmath * number = bitmath"""
bm1 = bitmath.KiB(1)
num1 = 2
result = bm1 * num1
self.assertEqual(result, bitmath.KiB(2))
self.assertIs(type(result), bitmath.KiB)
def test_number_mul_bitmath_is_number(self):
"""number * bitmath = bitmath"""
num1 = 2
bm1 = bitmath.KiB(1)
result = num1 * bm1
self.assertEqual(result, bitmath.KiB(2.0))
self.assertIs(type(result), bitmath.KiB)
##################################################################
# div
def test_bitmath_div_bitmath_is_number(self):
"""bitmath / bitmath = number"""
bm1 = bitmath.KiB(1)
bm2 = bitmath.KiB(2)
result = bm1 / bm2
self.assertEqual(result, 0.5)
self.assertIs(type(result), float)
def test_bitmath_div_number_is_bitmath(self):
"""bitmath / number = bitmath"""
bm1 = bitmath.KiB(1)
num1 = 2
result = bm1 / num1
self.assertEqual(result, bitmath.KiB(0.5))
self.assertIs(type(result), bitmath.KiB)
def test_number_div_bitmath_is_number(self):
"""number / bitmath = number"""
num1 = 2
bm1 = bitmath.KiB(1)
result = num1 / bm1
self.assertEqual(result, 2.0)
self.assertIs(type(result), float)
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