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kdv423-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
# -------
# imports
# -------
from io import StringIO
from unittest import main, TestCase
from Collatz import collatz_read, collatz_eval, collatz_print, collatz_solve, cycle_length, naive_cycle_length
# -----------
# TestCollatz
# -----------
class TestCollatz(TestCase):
# ----
# read
# ----
def test_read_1(self):
line = "1 10\n"
start, end = collatz_read(line)
self.assertEqual(start, 1)
self.assertEqual(end, 10)
def test_read_2(self):
line = "10 1\n"
start, end = collatz_read(line)
self.assertEqual(start, 10)
self.assertEqual(end, 1)
# ----
# eval
# ----
def test_eval_1(self):
maxcycle = collatz_eval(1, 10)
self.assertEqual(maxcycle, 20)
def test_eval_2(self):
maxcycle = collatz_eval(100, 200)
self.assertEqual(maxcycle, 125)
def test_eval_3(self):
maxcycle = collatz_eval(201, 210)
self.assertEqual(maxcycle, 89)
def test_eval_4(self):
maxcycle = collatz_eval(900, 1000)
self.assertEqual(maxcycle, 174)
def test_eval_5(self):
maxcycle = collatz_eval(1, 1000000)
self.assertEqual(maxcycle, 525)
# -----
# print
# -----
def test_print_1(self):
out = StringIO()
collatz_print(out, 1, 10, 20)
self.assertEqual(out.getvalue(), "1 10 20\n")
def test_print_2(self):
out = StringIO()
collatz_print(out, 10, 1000000, 525)
self.assertEqual(out.getvalue(), "10 1000000 525\n")
# -----
# solve
# -----
def test_solve_1(self):
reader = StringIO("1 10\n100 200\n201 210\n900 1000\n")
out = StringIO()
collatz_solve(reader, out)
self.assertEqual(
out.getvalue(), "1 10 20\n100 200 125\n201 210 89\n900 1000 174\n")
def test_solve_2(self):
reader = StringIO("1 1000000\n")
out = StringIO()
collatz_solve(reader, out)
self.assertEqual(out.getvalue(), "1 1000000 525\n")
def test_solve_3(self):
reader = StringIO("100 200\n1 10\n1 1000000\n1 1\n")
out = StringIO()
collatz_solve(reader, out)
self.assertEqual(
out.getvalue(), "100 200 125\n1 10 20\n1 1000000 525\n1 1 1\n")
def test_solve_4(self):
reader = StringIO("100 1\n")
out = StringIO()
collatz_solve(reader, out)
self.assertEqual(out.getvalue(), "100 1 119\n")
# ------------
# cycle length
# ------------
def test_cycle_length_1(self):
cycle = cycle_length(10)
self.assertEqual(cycle, 7)
def test_cycle_length_2(self):
cycle = cycle_length(1)
self.assertEqual(cycle, 1)
def test_cycle_length_3(self):
cycle = cycle_length(1000000)
self.assertEqual(cycle, 153)
# ------------------
# naive cycle length
# ------------------
def test_naive_cycle_length_1(self):
cycle = naive_cycle_length(10)
self.assertEqual(cycle, 7)
def test_naive_cycle_length_2(self):
cycle = naive_cycle_length(1)
self.assertEqual(cycle, 1)
def test_naive_cycle_length_3(self):
cycle = naive_cycle_length(1000000)
self.assertEqual(cycle, 153)
# ----
# main
# ----
if __name__ == "__main__":
main()