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msp684-TestCollatz.py
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msp684-TestCollatz.py
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#!/usr/bin/env python
"""
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, is_even, lazy_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_1 (self) :
r = StringIO.StringIO("23435 5678\n")
a = [0, 0]
b = collatz_read(r, a)
self.assert_(b == True)
self.assert_(a[0] == 23435)
self.assert_(a[1] == 5678)
def test_read_2 (self) :
r = StringIO.StringIO("234234 45646\n")
a = [0, 0]
b = collatz_read(r, a)
self.assert_(b == True)
self.assert_(a[0] == 234234)
self.assert_(a[1] == 45646)
def test_read_3 (self) :
r = StringIO.StringIO("1 11\n")
a = [0, 0]
b = collatz_read(r, a)
self.assert_(b == True)
self.assert_(a[0] == 1)
self.assert_(a[1] == 11)
# ----
# 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)
# -----
# 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_1 (self) :
w = StringIO.StringIO()
collatz_print(w, 456, 789, 22)
self.assert_(w.getvalue() == "456 789 22\n")
def test_print_2 (self) :
w = StringIO.StringIO()
collatz_print(w, 666, 666, 666)
self.assert_(w.getvalue() == "666 666 666\n")
def test_print_3 (self) :
w = StringIO.StringIO()
collatz_print(w, 234, 465, 123345)
self.assert_(w.getvalue() == "234 465 123345\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_solve_2(self) :
r = StringIO.StringIO("30 40\n50 60\n")
w = StringIO.StringIO()
collatz_solve(r, w)
self.assert_(w.getvalue() == "30 40 107\n50 60 113\n")
def test_solve_3 (self) :
r = StringIO.StringIO("10000 10000\n")
w = StringIO.StringIO()
collatz_solve(r, w)
self.assert_(w.getvalue() == "10000 10000 30\n")
def test_solve_4 (self) :
r = StringIO.StringIO("123 456\n")
w = StringIO.StringIO()
collatz_solve(r, w)
self.assert_(w.getvalue() == "123 456 144\n")
# ----
# is_even
# ----
def test_is_even (self):
a = [2, 4, 6, 8, 10]
for x in a:
self.assert_(is_even(x))
def test_is_even_2 (self):
a = [101, 103, 105]
for x in a:
self.assert_(not is_even(x))
def test_is_even_3 (self):
b = 6
self.assert_(is_even(b))
b += 1
self.assert_(not is_even(b))
# ----
# lazy_cache
# ----
def test_lazy_cache (self):
l = [0]*1000001
l[1] = 1
lazy_cache(1, 10, l)
assert l[5] == 6
def test_lazy_cache_2 (self):
l = [0]*1000001
l[1] = 1
lazy_cache(10, 100, l)
assert l[50] == 25
def test_lazy_cache_3 (self):
l = [0]*1000001
l[1] = 1
lazy_cache(100, 10000, l)
assert l[5000] == 29
# ----
# main
# ----
print "TestCollatz.py"
unittest.main()
print "Done."