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mjx63-TestCollatz.py
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mjx63-TestCollatz.py
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"""Testing Harness for Collatz project"""
#!/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, get_cycle_length, collatz_eval, collatz_print, collatz_solve
# -----------
# TestCollatz
# -----------
class TestCollatz(TestCase):
"""Contains test methods that test each function in Collatz.py"""
# ----
# read
# ----
def test_read_1(self):
"""Test collatz_read function"""
line = "1 10\n"
i, j = collatz_read(line)
self.assertEqual(i, 1)
self.assertEqual(j, 10)
def test_read_2(self):
"""Test collatz_read function"""
line = "10 20\n"
i, j = collatz_read(line)
self.assertEqual(i, 10)
self.assertEqual(j, 20)
def test_read_3(self):
"""Test collatz_read function"""
line = "30 40\n"
i, j = collatz_read(line)
self.assertEqual(i, 30)
self.assertEqual(j, 40)
#-----------------
# get_cycle_length
#-----------------
def test_get_cycle_length_1(self):
"""Test get_cycle_length function"""
num = 30
result = get_cycle_length(num)
self.assertEqual(result, 19)
def test_get_cycle_length_2(self):
"""Test get_cycle_length function"""
num = 50
result = get_cycle_length(num)
self.assertEqual(result, 25)
def test_get_cycle_length_3(self):
"""Test get_cycle_length function"""
num = 100
result = get_cycle_length(num)
self.assertEqual(result, 26)
# ----
# eval
# ----
def test_eval_1(self):
"""Test collatz_eval function"""
value = collatz_eval(1, 10)
self.assertEqual(value, 20)
def test_eval_2(self):
"""Test collatz_eval function"""
value = collatz_eval(100, 200)
self.assertEqual(value, 125)
def test_eval_3(self):
"""Test collatz_eval function"""
value = collatz_eval(201, 210)
self.assertEqual(value, 89)
def test_eval_4(self):
"""Test collatz_eval function"""
value = collatz_eval(900, 1000)
self.assertEqual(value, 174)
# -----
# print
# -----
def test_print_1(self):
"""Test collatz_print function"""
writer = StringIO()
collatz_print(writer, 1, 10, 20)
self.assertEqual(writer.getvalue(), "1 10 20\n")
def test_print_2(self):
"""Test collatz_print function"""
writer = StringIO()
collatz_print(writer, 10, 20, 30)
self.assertEqual(writer.getvalue(), "10 20 30\n")
def test_print_3(self):
"""Test collatz_print function"""
writer = StringIO()
collatz_print(writer, 30, 40, 50)
self.assertEqual(writer.getvalue(), "30 40 50\n")
# -----
# solve
# -----
def test_solve_1(self):
"""Test collatz_solve function"""
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 collatz_solve function"""
reader = StringIO("1 1\n358346 358846\n280576 284136\n113384 134378\n")
writer = StringIO()
collatz_solve(reader, writer)
self.assertEqual(writer.getvalue(), \
"1 1 1\n358346 358846 348\n280576 284136 358\n113384 134378 349\n")
# ----
# main
# ----
if __name__ == "__main__":
main()