forked from hychyc071/cs373-collatz-tests
/
eh7984-TestCollatz.py
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/
eh7984-TestCollatz.py
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#!/usr/bin/env python
# -------------------------------
# projects/collatz/TestCollatz.py
# Copyright (C) 2011
# Glenn P. Downing
# -------------------------------
"""
To test the program:
% python TestCollatz.py > TestCollatz.py.out
% chmod ugo+x TestCollatz.py
% TestCollatz.py > TestCollatz.py.out
"""
# -------
# imports
# -------
import StringIO
import unittest
from Collatz import collatz_read, collatz_eval, collatz_print, collatz_solve, collatz_cycle_length, collatz_print_first
# -----------
# TestCollatz
# -----------
class TestCollatz (unittest.TestCase) :
# ----
# read
# ----
def test_read_1 (self) :
r = StringIO.StringIO("1 10\n")
a = [0, 0]
b = collatz_read(r, a)
self.assert_(b == True)
self.assert_(a[0] == 1)
self.assert_(a[1] == 10)
def test_read_2 (self) :
r = StringIO.StringIO("20 10\n")
a = [0, 0]
b = collatz_read(r, a)
self.assert_(b == True)
self.assert_(a[0] == 20)
self.assert_(a[1] == 10)
def test_read_3 (self) :
r = StringIO.StringIO("")
a = [0, 0]
b = collatz_read(r, a)
self.assert_(b == False)
self.assert_(a[0] == 0)
self.assert_(a[1] == 0)
# ------------
# cycle length
# ------------
def test_cycle_length_1 (self) :
cache = [0 for x in range(1000000)]
v = collatz_cycle_length(1, cache)
self.assert_(v == 1)
def test_cycle_length_2 (self) :
cache = [0 for x in range(1000000)]
v = collatz_cycle_length(5, cache)
self.assert_(v == 6)
def test_cycle_length_3 (self) :
cache = [0 for x in range(1000000)]
v = collatz_cycle_length(16, cache)
self.assert_(v == 5)
# ----
# eval
# ----
def test_eval_1 (self) :
v = collatz_eval(1, 10)
self.assert_(v == 20)
def test_eval_2 (self) :
v = collatz_eval(100, 200)
self.assert_(v == 125)
def test_eval_3 (self) :
v = collatz_eval(201, 210)
self.assert_(v == 89)
def test_eval_4 (self) :
v = collatz_eval(900, 1000)
self.assert_(v == 174)
def test_eval_4 (self) :
lower = [978922, 584797, 348915, 431238, 155191, 581959, 543387, 1]
upper = [405170, 634441, 157051, 273274, 12293, 959469, 604788, 999999]
answer = [525, 509, 443, 449, 375, 525, 452, 525]
for x in range (len(answer)) :
a = collatz_eval(lower[x], upper[x])
self.assert_(a == answer[x])
# -----
# print
# -----
def test_print_1 (self) :
w = StringIO.StringIO()
collatz_print(w, 1, 10, 20)
self.assert_(w.getvalue() == "\n1 10 20")
def test_print_2 (self) :
w = StringIO.StringIO()
collatz_print(w, 20, 30, 40)
self.assert_(w.getvalue() == "\n20 30 40")
def test_print_3 (self) :
w = StringIO.StringIO()
collatz_print(w, 100, 10, 20)
self.assert_(w.getvalue() == "\n100 10 20")
# -----------
# print first
# -----------
def test_print_first_1 (self) :
w = StringIO.StringIO()
collatz_print_first(w, 1, 10, 20)
self.assert_(w.getvalue() == "1 10 20")
def test_print_first_2 (self) :
w = StringIO.StringIO()
collatz_print_first(w, 20, 30, 40)
self.assert_(w.getvalue() == "20 30 40")
def test_print_first_3 (self) :
w = StringIO.StringIO()
collatz_print_first(w, 100, 10, 20)
self.assert_(w.getvalue() == "100 10 20")
# -----
# solve
# -----
def test_solve_1 (self) :
r = StringIO.StringIO("1 10\n100 200\n201 210\n900 1000\n")
w = StringIO.StringIO()
collatz_solve(r, w)
self.assert_(w.getvalue() == "1 10 20\n100 200 125\n201 210 89\n900 1000 174")
def test_solve_2 (self) :
r = StringIO.StringIO("444915 961057\n771596 768855\n398674 42676\n")
w = StringIO.StringIO()
collatz_solve(r, w)
self.assert_(w.getvalue() == "444915 961057 525\n771596 768855 393\n398674 42676 443")
def test_solve_3 (self) :
r = StringIO.StringIO("95508 7437\n231887 82208\n")
w = StringIO.StringIO()
collatz_solve(r, w)
self.assert_(w.getvalue() == "95508 7437 351\n231887 82208 443")
# ----
# main
# ----
print "TestCollatz.py"
unittest.main()
print "Done."