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nds652-TestCollatz.py
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nds652-TestCollatz.py
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#!/usr/bin/env python3
# -------------------------------
# projects/collatz/TestCollatz.py
# Copyright (C) 2016
# Glenn P. Downing
# -------------------------------
# https://docs.python.org/3.4/reference/simple_stmts.html#grammar-token-assert_stmt
"""
Module for testing Collatz.py
"""
# -------
# imports
# -------
from io import StringIO
from unittest import main, TestCase
from Collatz import collatz_read, collatz_eval, collatz_print, collatz_solve, collatz_solve_single
# -----------
# TestCollatz
# -----------
class TestCollatz(TestCase):
"""
Test class for Collaatz.py
Inherits the class TestCase so that it can use the assertEquals methods
"""
# ----
# read
# ----
def test_read(self):
"""
Unit test testing the functionality of collatz_read
:return:
"""
line = "1 10\n"
start_index, end_index = collatz_read(line)
self.assertEqual(start_index, 1)
self.assertEqual(end_index, 10)
# ----
# eval
# ----
def test_eval_1(self):
"""
Unit test for collatz_eval with range 1-10
:return:
"""
max_cycle = collatz_eval(1, 10)
self.assertEqual(max_cycle, 20)
def test_eval_2(self):
"""
Unit test for collatz_eval with range 100-200
:return:
"""
max_cycle = collatz_eval(100, 200)
self.assertEqual(max_cycle, 125)
def test_eval_3(self):
"""
Unit test for collatz_eval with range 201-210
:return:
"""
max_cycle = collatz_eval(201, 210)
self.assertEqual(max_cycle, 89)
def test_eval_4(self):
"""
Unit test for collatz_eval with range 900-1000
:return:
"""
max_cycle = collatz_eval(900, 1000)
self.assertEqual(max_cycle, 174)
def test_eval_5(self):
"""
Unit test test large range that spans across several thousands of integers
:return:
"""
max_cycle = collatz_eval(572556, 815799)
self.assertEqual(max_cycle, 509)
def test_eval_6(self):
"""
Unit test test large range that spans across several thousands of integers
:return:
"""
max_cycle = collatz_eval(815799, 572556)
self.assertEqual(max_cycle, 509)
def test_single(self):
"""
Test the single solve method
:return:
"""
cache = {}
max_cycle = collatz_solve_single(10, cache)
self.assertEqual(max_cycle, 7)
def test_single_2(self):
"""
Test the single solve method
:return:
"""
cache = {}
max_cycle = collatz_solve_single(1, cache)
self.assertEqual(max_cycle, 1)
def test_single_3(self):
"""
Test the single solve method
:return:
"""
cache = {}
max_cycle = collatz_solve_single(100, cache)
self.assertEqual(max_cycle, 26)
# -----
# print
# -----
def test_print(self):
"""
Unit test testing the printing functionality
:return:
"""
writer = StringIO()
collatz_print(writer, 1, 10, 20)
self.assertEqual(writer.getvalue(), "1 10 20\n")
def test_print_2(self):
"""
Unit test testing the printing functionality
:return:
"""
writer = StringIO()
collatz_print(writer, 100, 200, 125)
self.assertEqual(writer.getvalue(), "100 200 125\n")
def test_print_3(self):
"""
Unit test testing the printing functionality
:return:
"""
writer = StringIO()
collatz_print(writer, 201, 210, 89)
self.assertEqual(writer.getvalue(), "201 210 89\n")
# -----
# solve
# -----
def test_solve(self):
"""
Integration Test reading multiple lines, passing them to collatz_eval,
and getting a max cycle length for each range
:return:
"""
reader = StringIO("1 10\n100 200\n201 210\n900 1000\n")
writer = StringIO()
collatz_solve(reader, writer)
self.assertEqual(writer.getvalue(),
"1 10 20\n100 200 125\n201 210 89\n900 1000 174\n")
def test_solve_2(self):
"""
Integration Test reading multiple lines, passing them to collatz_eval,
and getting a max cycle length for each range
:return:
"""
reader = StringIO(" \n")
writer = StringIO()
collatz_solve(reader, writer)
self.assertEqual(writer.getvalue(),
"")
# ----
# main
# ----
if __name__ == "__main__":
main()