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sm38484-TestCollatz.py
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sm38484-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, eval_cycle
# -----------
# TestCollatz
# -----------
class TestCollatz (unittest.TestCase) :
# ----
# read
# ----
def test_read (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_lowerbound (self) :
r = StringIO.StringIO("1 1\n")
a = [0, 0]
b = collatz_read(r, a)
self.assert_(b == True)
self.assert_(a[0] == 1)
self.assert_(a[1] == 1)
def test_read_middle1 (self) :
r = StringIO.StringIO("499999 500000\n")
a = [0, 0]
b = collatz_read(r, a)
self.assert_(b == True)
self.assert_(a[0] == 499999)
self.assert_(a[1] == 500000)
def test_read_middle2 (self) :
r = StringIO.StringIO("500000 499999\n")
a = [0, 0]
b = collatz_read(r, a)
self.assert_(b == True)
self.assert_(a[0] == 500000)
self.assert_(a[1] == 499999)
def test_read_range (self) :
r = StringIO.StringIO("1 999999\n")
a = [0, 0]
b = collatz_read(r, a)
self.assert_(b == True)
self.assert_(a[0] == 1)
self.assert_(a[1] == 999999)
def test_read_end (self) :
r = StringIO.StringIO("999999 999999\n")
a = [0, 0]
b = collatz_read(r, a)
self.assert_(b == True)
self.assert_(a[0] == 999999)
self.assert_(a[1] == 999999)
# ----
# eval
# ----
def test_eval_1 (self) :
v = collatz_eval(1, 10)
self.assert_(v == 20)
def test_eval_one(self):
v = collatz_eval(1,1)
self.assert_(v==1)
def test_eval_two(self):
v = collatz_eval(10,1)
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_swap(self) :
v = collatz_eval(9, 2)
self.assert_(v == 20)
def test_eval_mid (self) :
v = collatz_eval(499999, 500000)
self.assert_(v == 258)
def test_eval_mid2 (self) :
v = collatz_eval(500000, 499999)
self.assert_(v == 258)
def test_eval_edgehigh (self) :
v = collatz_eval(999999, 999999)
self.assert_(v == 259)
def test_eval_edgehigh (self) :
v = collatz_eval(1, 999999)
self.assert_(v == 525)
# ----
# eval_cycle
# ----
def test_eval_cycle1 (self) :
v = eval_cycle(1)
self.assert_(v == 1)
def test_eval_cycle2 (self) :
v = eval_cycle(27)
self.assert_(v == 112)
def test_eval_cycle3 (self) :
v = eval_cycle(16)
self.assert_(v == 5)
# -----
# print
# -----
def test_print (self) :
w = StringIO.StringIO()
collatz_print(w, 1, 10, 20)
self.assert_(w.getvalue() == "1 10 20\n")\
def test_print2 (self) :
w = StringIO.StringIO()
collatz_print(w, 1, 1, 1)
self.assert_(w.getvalue() == "1 1 1\n")\
def test_print3 (self) :
w = StringIO.StringIO()
collatz_print(w, 10, 1, 20)
self.assert_(w.getvalue() == "10 1 20\n")\
def test_print4 (self) :
w = StringIO.StringIO()
collatz_print(w, 999999, 1, 525)
self.assert_(w.getvalue() == "999999 1 525\n")\
def test_print5 (self) :
w = StringIO.StringIO()
collatz_print(w, 499999, 500000, 258)
self.assert_(w.getvalue() == "499999 500000 258\n")\
def test_print6 (self) :
w = StringIO.StringIO()
collatz_print(w, 999999, 999999, 259)
self.assert_(w.getvalue() == "999999 999999 259\n")\
def test_print7 (self) :
w = StringIO.StringIO()
collatz_print(w, 900, 1000, 174)
self.assert_(w.getvalue() == "900 1000 174\n")\
# -----
# solve
# -----
def test_solve (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\n")
def test_solve2 (self) :
r = StringIO.StringIO("1 1\n1 999999\n499999 500000\n")
w = StringIO.StringIO()
collatz_solve(r, w)
self.assert_(w.getvalue() == "1 1 1\n1 999999 525\n499999 500000 258\n")
def test_solve3 (self) :
r = StringIO.StringIO("")
w = StringIO.StringIO()
collatz_solve(r, w)
self.assert_(w.getvalue() == "")
def test_solve4 (self) :
r = StringIO.StringIO("104693 814432\n409893 161478\n357275 499194\n278680 945701\n")
w = StringIO.StringIO()
collatz_solve(r, w)
self.assert_(w.getvalue() == "104693 814432 509\n409893 161478 443\n357275 499194 449\n278680 945701 525\n")
# ----
# main
# ----
print "TestCollatz.py"
unittest.main()
print "Done."