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klz238-TestCollatz.py
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klz238-TestCollatz.py
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#!/usr/bin/env python
# -------------------------------
# projects/collatz/TestCollatz.py
# Copyright (C) 2012
# 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
from Collatz import collatz_eval_cache, collatz_precalc_cache, collatz_solve_cache
# -----------
# 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_negative (self) :
r = StringIO.StringIO("-1 50\n")
a = [0, 0]
b = False
try:
b = collatz_read(r, a)
except AssertionError, e:
self.assert_(b == False)
self.assert_(a[0] == -1)
self.assert_(a[1] == 50)
return
# We should never get here, so fail
self.assert_(b == True)
def test_read_alpha (self) :
r = StringIO.StringIO("abc $%^\n")
a = [0, 0]
b = False
try:
b = collatz_read(r, a)
except ValueError, e:
self.assert_(b == False)
self.assert_(a[0] == 0)
self.assert_(a[1] == 0)
return
# We should never get here, so fail
self.assert_(b == True)
# ----
# 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_same (self) :
v = collatz_eval(5, 5)
self.assert_(v == 6)
# ----------
# eval_cache
# ----------
def test_eval_cache_1 (self) :
cache = {1:1, 2:2, 3:8, 4:3, 5:6}
v = collatz_eval_cache(1, 10, cache)
self.assert_(v == 20)
def test_eval_cache_2 (self) :
cache = {1:1, 2:2, 3:8, 4:3, 5:6, 7:17, 15:18, 19:21, 24:11, 34:14}
v = collatz_eval_cache(20, 40, cache)
self.assert_(v == 112)
def test_eval_cache_3 (self) :
cache = {16:5, 21:8, 24:11, 40:9, 160:11, 52:12, 22:16, 30:19, 18:21, 25:24}
v = collatz_eval_cache(100, 200, cache)
self.assert_(v == 125)
# -------------
# precalc_cache
# -------------
def test_precalc_cache_1 (self) :
cache = {}
collatz_precalc_cache(1, 10, cache)
self.assert_(cache[1] == 1)
self.assert_(cache[3] == 8)
self.assert_(cache[9] == 20)
def test_precalc_cache_2 (self) :
cache = {}
collatz_precalc_cache(10, 1, cache)
self.assert_(cache[1] == 1)
self.assert_(cache[5] == 6)
self.assert_(cache[7] == 17)
def test_precalc_cache_3 (self) :
cache = {}
collatz_precalc_cache(100, 200, cache)
self.assert_(cache[106] == 13)
self.assert_(cache[134] == 29)
self.assert_(cache[159] == 55)
self.assert_(cache[189] == 107)
# -----
# print
# -----
def test_print (self) :
w = StringIO.StringIO()
collatz_print(w, 1, 10, 20)
self.assert_(w.getvalue() == "1 10 20\n")
def test_print_alpha (self) :
w = StringIO.StringIO()
collatz_print(w, 'abc', 123, "^^^")
self.assert_(w.getvalue() == "abc 123 ^^^\n")
def test_print_object (self) :
w = StringIO.StringIO()
collatz_print(w, w, -1, self)
ws = str(w)
ss = str(self)
self.assert_(w.getvalue() == (ws + " -1 " + ss + "\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) :
r = StringIO.StringIO("20 40\n1200 1500\n5000 5100\n10000 11000\n")
w = StringIO.StringIO()
collatz_solve(r, w)
self.assert_(w.getvalue() == "20 40 112\n1200 1500 177\n5000 5100 179\n10000 11000 268\n")
def test_solve_3 (self) :
r = StringIO.StringIO("149805 468357\n111816 181804\n747961 968449\n312738 923696\n")
w = StringIO.StringIO()
collatz_solve(r, w)
self.assert_(w.getvalue() == "149805 468357 449\n111816 181804 383\n747961 968449 525\n312738 923696 525\n")
# -----------
# solve_cache
# -----------
def test_solve_cache_1 (self) :
r = StringIO.StringIO("1 10\n100 200\n201 210\n900 1000\n")
w = StringIO.StringIO()
collatz_solve_cache(r, w)
self.assert_(w.getvalue() == "1 10 20\n100 200 125\n201 210 89\n900 1000 174\n")
def test_solve_cache_2 (self) :
r = StringIO.StringIO("20 40\n1200 1500\n5000 5100\n10000 11000\n")
w = StringIO.StringIO()
collatz_solve_cache(r, w)
self.assert_(w.getvalue() == "20 40 112\n1200 1500 177\n5000 5100 179\n10000 11000 268\n")
def test_solve_cache_3 (self) :
r = StringIO.StringIO("149805 468357\n111816 181804\n747961 968449\n312738 923696\n")
w = StringIO.StringIO()
collatz_solve_cache(r, w)
self.assert_(w.getvalue() == "149805 468357 449\n111816 181804 383\n747961 968449 525\n312738 923696 525\n")
# ----
# main
# ----
print "TestCollatz.py"
unittest.main()
print "Done."