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sam4862-TestCollatz.py
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sam4862-TestCollatz.py
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#!/usr/bin/env python3
"""This is a python file"""
# -------------------------------
# projects/collatz/TestCollatz.py
# Copyright (C) 2016
# Glenn P. Downing
# -------------------------------
# https://docs.python.org/3.4/reference/simple_stmts.html#grammar-token-assert_stmt
# -------
# imports
# -------
from io import StringIO
from unittest import main, TestCase
from Collatz import collatz_read, collatz_eval, collatz_print, collatz_solve, cycle_length
# -----------
# TestCollatz
# -----------
class TestCollatz(TestCase):
"""Tests"""
# ----
# read
# ----
def test_read_1(self):
"""Does read work?"""
stream = "1 10\n"
i, j = collatz_read(stream)
self.assertEqual(i, 1)
self.assertEqual(j, 10)
def test_read_2(self):
"""Does read work?"""
stream = "3 5\n"
i, j = collatz_read(stream)
self.assertEqual(i, 3)
self.assertEqual(j, 5)
def test_read_3(self):
"""Does read work?"""
stream = "100 500\n"
i, j = collatz_read(stream)
self.assertEqual(i, 100)
self.assertEqual(j, 500)
# ----
# eval
# ----
def test_eval_1(self):
"""Does eval work?"""
val = collatz_eval(1, 10)
self.assertEqual(val, 20)
def test_eval_2(self):
"""Does eval work?"""
val = collatz_eval(100, 200)
self.assertEqual(val, 125)
def test_eval_3(self):
"""Does eval work?"""
val = collatz_eval(201, 210)
self.assertEqual(val, 89)
def test_eval_4(self):
"""Does eval work?"""
val = collatz_eval(900, 1000)
self.assertEqual(val, 174)
# -----
# print
# -----
def test_print1(self):
"""Does print work?"""
write = StringIO()
collatz_print(write, 1, 10, 20)
self.assertEqual(write.getvalue(), "1 10 20\n")
def test_print2(self):
"""Does print work?"""
write = StringIO()
collatz_print(write, 100, 200, 125)
self.assertEqual(write.getvalue(), "100 200 125\n")
def test_print3(self):
"""Does print work?"""
write = StringIO()
collatz_print(write, 201, 210, 89)
self.assertEqual(write.getvalue(), "201 210 89\n")
# -----
# solve
# -----
def test_solve_1(self):
"""Does solve work?"""
read = StringIO("1 10\n100 200\n201 210\n900 1000\n")
write = StringIO()
collatz_solve(read, write)
self.assertEqual(
write.getvalue(), "1 10 20\n100 200 125\n201 210 89\n900 1000 174\n")
def test_solve_2(self):
"""Does solve work?"""
read = StringIO("492 2460\n951 2853\n324 1296\n")
write = StringIO()
collatz_solve(read, write)
self.assertEqual(
write.getvalue(), "492 2460 183\n951 2853 209\n324 1296 182\n")
def test_solve_3(self):
"""Does solve work?"""
read = StringIO("2772 693\n")
write = StringIO()
collatz_solve(read, write)
self.assertEqual(write.getvalue(), "2772 693 209\n")
# ------------
# cycle length
# ------------
def test_cycle_1(self):
"""Does cycle length work?"""
num = 5
cylen = cycle_length(1, num)
self.assertEqual(cylen, 6)
def test_cycle_2(self):
"""Does cycle length work?"""
num = 10
cylen = cycle_length(1, num)
self.assertEqual(cylen, 7)
def test_cycle_3(self):
"""Does cycle length work?"""
num = 25
cylen = cycle_length(1, num)
self.assertEqual(cylen, 24)
# ----
# main
# ----
if __name__ == "__main__":
main()