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bud57-TestCollatz.py
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bud57-TestCollatz.py
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#!/usr/bin/env python3
"""Unit tests for Collatz.py"""
# -------------------------------
# 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, do_collatz
# -----------
# TestCollatz
# -----------
class TestCollatz(TestCase):
"""Unit tests for Colatz.py"""
# ----
# read
# ----
def test_read_1(self):
"""Test collatz_read"""
string = "1 10\n"
input_i, input_j = collatz_read(string)
self.assertEqual(input_i, 1)
self.assertEqual(input_j, 10)
def test_read_2(self):
"""Test collatz_read"""
string = "1000000 0\n"
input_i, input_j = collatz_read(string)
self.assertEqual(input_i, 1000000)
self.assertEqual(input_j, 0)
def test_read_3(self):
"""Test collatz_read"""
string = "800 800\n"
input_i, input_j = collatz_read(string)
self.assertEqual(input_i, 800)
self.assertEqual(input_j, 800)
# ----
# eval
# ----
def test_eval_1(self):
"""Test collatz_eval"""
val = collatz_eval(0, 1000000)
self.assertEqual(val, 525)
def test_eval_2(self):
"""Test collatz_eval"""
val = collatz_eval(64, 47)
self.assertEqual(val, 113)
def test_eval_3(self):
"""Test collatz_eval"""
val = collatz_eval(5, 5)
self.assertEqual(val, 6)
def test_eval_4(self):
"""Test collatz_eval"""
val = collatz_eval(2345, 458)
self.assertEqual(val, 183)
# ----------
# do_collatz
# ----------
def test_do_collatz_1(self):
"""Test do_collatz"""
max_len = do_collatz(23457, 23457)
self.assertEqual(max_len, 251)
def test_do_collatz_2(self):
"""Test do_collatz"""
max_len = do_collatz(980, 1002)
self.assertEqual(max_len, 143)
def test_do_collatz_3(self):
"""Test do_collatz"""
max_len = do_collatz(90900, 90914)
self.assertEqual(max_len, 271)
# -----
# print
# -----
def test_print_1(self):
"""Test collatz_print"""
writer = StringIO()
collatz_print(writer, 540460, 736383, 509)
self.assertEqual(writer.getvalue(), "540460 736383 509\n")
def test_print_2(self):
"""Test collatz_print"""
writer = StringIO()
collatz_print(writer, 487845, 812, 449)
self.assertEqual(writer.getvalue(), "487845 812 449\n")
def test_print_3(self):
"""Test collatz_print"""
writer = StringIO()
collatz_print(writer, 86, 865225, 525)
self.assertEqual(writer.getvalue(), "86 865225 525\n")
# -----
# solve
# -----
def test_solve_1(self):
"""Test collatz_solve"""
reader = StringIO("932297 769796\n 3716 526456\n 27864 9\n")
writer = StringIO()
collatz_solve(reader, writer)
self.assertEqual(writer.getvalue(),
"932297 769796 525\n3716 526456 470\n27864 9 308\n")
def test_solve_2(self):
"""Test collatz_solve"""
reader = StringIO("711851 87792\n 440021 658509\n 71258 231579\n")
writer = StringIO()
collatz_solve(reader, writer)
self.assertEqual(
writer.getvalue(), "711851 87792 509\n440021 658509 509\n71258 231579 443\n")
def test_solve_3(self):
"""Test collatz_solve"""
reader = StringIO("386724 366039\n458 4598\n135298 192870\n")
writer = StringIO()
collatz_solve(reader, writer)
self.assertEqual(
writer.getvalue(), "386724 366039 423\n458 4598 238\n135298 192870 383\n")
# ----
# main
# ----
if __name__ == "__main__":
main()