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andyhsu-TestCollatz.py
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andyhsu-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_cycles, collatz_cache_init, collatz_eval, collatz_print, collatz_solve
# -----------
# TestCollatz
# -----------
class TestCollatz (unittest.TestCase) :
# ----
# read
# ----
def test_read_1 (self) : # Accepted string
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) : # Excessive string
r = StringIO.StringIO("15 12 junk junk morejunk\n")
a = [0, 0]
b = collatz_read(r, a)
self.assert_(b == True)
self.assert_(a[0] == 15)
self.assert_(a[1] == 12)
def test_read_4 (self) : # Empty string
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)
# ------
# cycles
# ------
def test_cycles_1 (self) : # No cache
cache = [0]
cachelen = 0
v = collatz_cycles(cache, cachelen, 1)
self.assert_(v == 1)
def test_cycles_2 (self) : # Using cache
cache = [0, 1, 2, 0, 3, 0, 0, 0, 4]
cachelen = 9
v = collatz_cycles(cache, cachelen, 5)
self.assert_(v == 6)
def test_cycles_3 (self) : # Normal
cache = [0, 1, 2, 0, 3, 0, 0, 0, 4]
cachelen = 9
v = collatz_cycles(cache, cachelen, 7)
self.assert_(v == 17)
def test_cycles_4 (self) : # Extensive calculation
cache = [0, 1, 2, 0, 3, 0, 0, 0, 4]
cachelen = 9
v = collatz_cycles(cache, cachelen, 27)
self.assert_(v == 112)
def test_cycles_5 (self) : # Extensive calculation
cache = [0, 1, 2, 0, 3, 0, 0, 0, 4]
cachelen = 9
v = collatz_cycles(cache, cachelen, 60975)
self.assert_(v == 335)
def test_cycles_6 (self) : # Extensive calculation
cache = [0, 1, 2, 0, 3, 0, 0, 0, 4]
cachelen = 9
v = collatz_cycles(cache, cachelen, 704511)
self.assert_(v == 243)
# ----------
# cache_init
# ----------
def test_cache_init_1 (self) :
n = 1
v = collatz_cache_init(n)
self.assert_(v == [0])
def test_cache_init_2 (self) :
n = 10
v = collatz_cache_init(n)
self.assert_(v == [0, 1, 2, 0, 3, 0, 0, 0, 4, 0])
def test_cache_init_3 (self) :
n = 4
v = collatz_cache_init(n)
self.assert_(v == [0, 1, 2, 0])
# ----
# 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_5 (self) : # Size 1 range
v = collatz_eval(10, 10)
self.assert_(v == 7)
def test_eval_6 (self) : # Reverse range
v = collatz_eval(200, 100)
self.assert_(v == 125)
def test_eval_7 (self) : # Size 1 again
v = collatz_eval(27, 27)
self.assert_(v == 112)
def test_eval_8 (self) : # Reverse range
v = collatz_eval(1000, 900)
self.assert_(v == 174)
# -----
# print
# -----
def test_print_1 (self) :
w = StringIO.StringIO()
collatz_print(w, 1, 10, 20)
self.assert_(w.getvalue() == "1 10 20\n")
def test_print_2 (self) :
w = StringIO.StringIO()
collatz_print(w, "i", "like", "turtles")
self.assert_(w.getvalue() == "i like turtles\n")
def test_print_3 (self) :
w = StringIO.StringIO()
collatz_print(w, 25, 1, 20)
self.assert_(w.getvalue() == "25 1 20\n")
def test_print_4 (self) :
w = StringIO.StringIO()
collatz_print(w, 90000000000000, 10, 2101540)
self.assert_(w.getvalue() == "90000000000000 10 2101540\n")
# -----
# 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\n")
def test_solve_2 (self) : # Empty input
r = StringIO.StringIO("")
w = StringIO.StringIO()
collatz_solve(r, w)
self.assert_(w.getvalue() == "")
def test_solve_3 (self) :
r = StringIO.StringIO("999999 999999\n999999 1\n")
w = StringIO.StringIO()
collatz_solve(r, w)
self.assert_(w.getvalue() == "999999 999999 259\n999999 1 525\n")
def test_solve_4 (self) : # 1's only
r = StringIO.StringIO("1 1\n")
w = StringIO.StringIO()
collatz_solve(r, w)
self.assert_(w.getvalue() == "1 1 1\n")
# ----
# main
# ----
print "TestCollatz.py"
unittest.main()
print "Done."