# Created by Egor Kostan.
# GitHub: https://github.com/ikostan
# LinkedIn: https://www.linkedin.com/in/egor-kostan/
import allure
import pytest
import unittest
from utils.log_func import print_log
from kyu_7.easy_line.easyline import easy_line, calc_combination_per_row_item
[docs]@allure.epic('7 kyu')
@allure.parent_suite('Beginner')
@allure.suite("Fundamentals")
@allure.sub_suite("Unit Tests")
@allure.feature("Math")
@allure.story("Easy Line")
@allure.tag('FUNDAMENTALS', 'MATHEMATICS', 'ALGORITHMS', 'NUMBERS')
@allure.link(url='https://www.codewars.com/kata/'
'56e7d40129035aed6c000632/train/python',
name='Source/Kata')
class EasyLineTestCase(unittest.TestCase):
"""
We want to calculate the sum of the squares of the binomial
coefficients on a given line with a function called easyline
(or easyLine or easy-line).
Can you write a program which calculate easyline(n) where n
is the line number?
The function will take n (with: n>= 0) as parameter and will
return the sum of the squares of the binomial coefficients on line n.
"""
[docs] def test_easy_line_exception(self):
allure.dynamic.title("Testing easy_line function exception message")
allure.dynamic.severity(allure.severity_level.NORMAL)
allure.dynamic.description_html('<h3>Codewars badge:</h3>'
'<img src="https://www.codewars.com/users/myFirstCode'
'/badges/large">'
'<h3>Test Description:</h3>'
"<p>The function should raise exception for invalid n (n < 0) values.</p>")
n = -1
error_txt = 'ERROR: invalid n ({}) value. n must be >= 0'.format(n)
# Source: https://dev.to/wangonya/asserting-exceptions-with-pytest-8hl
with allure.step("Enter invalid n ({}) "
"and assert exception message: {}).".format(n, error_txt)):
with pytest.raises(ValueError) as error:
self.assertRaises(ValueError, easy_line(n))
self.assertEqual(error_txt, error.value)
[docs] def test_calc_combinations_per_row(self):
allure.dynamic.title("Testing calc_combinations_per_row function")
allure.dynamic.severity(allure.severity_level.NORMAL)
allure.dynamic.description_html('<h3>Codewars badge:</h3>'
'<img src="https://www.codewars.com/users/myFirstCode'
'/badges/large">'
'<h3>Test Description:</h3>'
"<p>The function should take row number and return Pascal's Triangle "
"combination per that row "
"coefficients on line n.</p>")
test_data = (
(0, 0, 1),
(1, 1, 1),
(2, 1, 2),
(3, 2, 3),
(4, 3, 4),
(5, 4, 5),
(6, 5, 6),
(7, 6, 7),
)
for data in test_data:
n: int = data[0]
i: int = data[1]
expected: int = data[2]
actual: int = calc_combination_per_row_item(n, i)
with allure.step("Enter row number ({}) "
"and assert expected ({}) "
"vs actual ({}).".format(n, expected, actual)):
print_log(n=n,
actual=actual,
expected=expected)
self.assertEqual(expected, actual)
[docs] def test_easy_line(self):
allure.dynamic.title("Testing easy_line function")
allure.dynamic.severity(allure.severity_level.NORMAL)
allure.dynamic.description_html('<h3>Codewars badge:</h3>'
'<img src="https://www.codewars.com/users/myFirstCode'
'/badges/large">'
'<h3>Test Description:</h3>'
"<p>The function should take n (with: n>= 0) as parameter "
"and must return the sum of the squares of the binomial "
"coefficients on line n.</p>")
test_data = (
(0, 1),
(1, 2),
(4, 70),
(7, 3432),
(13, 10400600),
(17, 2333606220),
(19, 35345263800),
(22, 2104098963720),
(24, 32247603683100),
(50, 100891344545564193334812497256)
)
for data in test_data:
n: int = data[0]
expected: int = data[1]
actual: int = easy_line(n)
with allure.step("Enter line number ({}) "
"and assert expected ({}) "
"vs actual ({}).".format(n, expected, actual)):
print_log(n=n,
actual=actual,
expected=expected)
self.assertEqual(expected, actual)