forked from budang/collatz-tests
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TestCollatz.py
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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
# -----------
# TestCollatz
# -----------
class TestCollatz(TestCase):
"""
class for testing Collatz.py
"""
# ----
# read
# ----
def test_read_1(self):
""" test reading capability """
string = "1 10\n"
start, end = collatz_read(string)
self.assertEqual(start, 1)
self.assertEqual(end, 10)
def test_read_2(self):
""" test reading capability """
string = "4 16\n"
start, end = collatz_read(string)
self.assertEqual(start, 4)
self.assertEqual(end, 16)
def test_read_3(self):
""" test reading capability """
string = "87 936\n"
start, end = collatz_read(string)
self.assertEqual(start, 87)
self.assertEqual(end, 936)
# ----
# eval
# ----
def test_eval_1(self):
""" test evaluating capability """
max_cycle = collatz_eval(1, 10)
self.assertEqual(max_cycle, 20)
def test_eval_2(self):
""" test evaluating capability """
max_cycle = collatz_eval(100, 200)
self.assertEqual(max_cycle, 125)
def test_eval_3(self):
""" test evaluating capability """
max_cycle = collatz_eval(201, 210)
self.assertEqual(max_cycle, 89)
def test_eval_4(self):
""" test evaluating capability """
max_cycle = collatz_eval(900, 1000)
self.assertEqual(max_cycle, 174)
def test_eval_5(self):
""" test evaluating capability """
max_cycle = collatz_eval(1, 1)
self.assertEqual(max_cycle, 1)
def test_eval_6(self):
""" test evaluating capability """
max_cycle = collatz_eval(999999, 1)
self.assertEqual(max_cycle, 525)
def test_eval_7(self):
""" test evaluating capability """
max_cycle = collatz_eval(10, 10)
self.assertEqual(max_cycle, 7)
def test_eval_8(self):
""" test evaluating capability """
max_cycle = collatz_eval(9, 6)
self.assertEqual(max_cycle, 20)
def test_eval_9(self):
""" test evaluating capability """
max_cycle = collatz_eval(1, 1000)
self.assertEqual(max_cycle, 179)
def test_eval_10(self):
""" test evaluating capability """
max_cycle = collatz_eval(6, 6)
self.assertEqual(max_cycle, 9)
def test_eval_11(self):
""" test evaluating capability """
max_cycle = collatz_eval(27, 27)
self.assertEqual(max_cycle, 112)
# -----
# print
# -----
def test_print_1(self):
""" test printing capability """
writer = StringIO()
collatz_print(writer, 1, 10, 20)
self.assertEqual(writer.getvalue(), "1 10 20\n")
def test_print_2(self):
""" test printing capability """
writer = StringIO()
collatz_print(writer, 6, 6, 9)
self.assertEqual(writer.getvalue(), "6 6 9\n")
def test_print_3(self):
""" test printing capability """
writer = StringIO()
collatz_print(writer, 108, 108, 114)
self.assertEqual(writer.getvalue(), "108 108 114\n")
# -----
# solve
# -----
def test_solve_1(self):
""" test solving capability """
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):
""" test solving capability """
reader = StringIO("1 1\n2 2\n3 3\n5 5\n10 10\n9 9\n7 7\n6 6\n")
writer = StringIO()
collatz_solve(reader, writer)
self.assertEqual(
writer.getvalue(), "1 1 1\n2 2 2\n3 3 8\n5 5 6\n10 10 7\n9 9 20\n7 7 17\n6 6 9\n")
def test_solve_3(self):
""" test solving capability """
reader = StringIO("100 171\n201 210\n900 1000\n")
writer = StringIO()
collatz_solve(reader, writer)
self.assertEqual(
writer.getvalue(), "100 171 125\n201 210 89\n900 1000 174\n")
# ----
# main
# ----
if __name__ == "__main__":
main()