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bcl646-TestCollatz.py
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bcl646-TestCollatz.py
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#!/usr/bin/env python3
"""
Tests for Collatz.py.
"""
# pylint: disable=missing-docstring, invalid-name
# -------------------------------
# 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, collatz_cycles
# -----------
# TestCollatz
# -----------
class TestCollatz(TestCase):
# ----
# read
# ----
def test_read_1(self):
s = "1 10\n"
i, j = collatz_read(s)
self.assertEqual(i, 1)
self.assertEqual(j, 10)
def test_read_2(self):
s = "99999 999999\n"
i, j = collatz_read(s)
self.assertEqual(i, 99999)
self.assertEqual(j, 999999)
def test_read_3(self):
s = "1 1\n"
i, j = collatz_read(s)
self.assertEqual(i, 1)
self.assertEqual(j, 1)
# ------
# cycles
# ------
def test_cycles_1(self):
i = collatz_cycles(1)
self.assertEqual(i, 1)
def test_cycles_2(self):
i = collatz_cycles(10)
self.assertEqual(i, 7)
def test_cycles_3(self):
i = collatz_cycles(999999)
self.assertEqual(i, 259)
# ----
# eval
# ----
def test_eval_1(self):
v = collatz_eval(1, 10)
self.assertEqual(v, 20)
def test_eval_2(self):
v = collatz_eval(100, 200)
self.assertEqual(v, 125)
def test_eval_3(self):
v = collatz_eval(201, 210)
self.assertEqual(v, 89)
def test_eval_4(self):
v = collatz_eval(900, 1000)
self.assertEqual(v, 174)
def test_eval_5(self):
v = collatz_eval(1, 1)
self.assertEqual(v, 1)
def test_eval_6(self):
v = collatz_eval(1, 99999)
self.assertEqual(v, 351)
# -----
# print
# -----
def test_print_1(self):
w = StringIO()
collatz_print(w, 1, 10, 20)
self.assertEqual(w.getvalue(), "1 10 20\n")
def test_print_2(self):
w = StringIO()
collatz_print(w, 1, 1, 1)
self.assertEqual(w.getvalue(), "1 1 1\n")
def test_print_3(self):
w = StringIO()
collatz_print(w, 111111, 222222, 333333)
self.assertEqual(w.getvalue(), "111111 222222 333333\n")
# -----
# solve
# -----
def test_solve_1(self):
r = StringIO("1 1\n")
w = StringIO()
collatz_solve(r, w)
self.assertEqual(w.getvalue(), "1 1 1\n")
def test_solve_2(self):
r = StringIO("1 10\n100 200\n201 210\n900 1000\n")
w = StringIO()
collatz_solve(r, w)
self.assertEqual(
w.getvalue(), "1 10 20\n100 200 125\n201 210 89\n900 1000 174\n")
def test_solve_3(self):
r = StringIO("")
w = StringIO()
collatz_solve(r, w)
self.assertEqual(w.getvalue(), "")
# ----
# main
# ----
if __name__ == "__main__":
main()