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nfjones-TestCollatz.py
executable file
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nfjones-TestCollatz.py
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#!/usr/bin/env python
# -------------------------------
# projects/collatz/TestCollatz.py
# Copyright (C) 2013
# 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, unittest
from Collatz import collatz_read, collatz_eval, collatz_print, collatz_solve
# -----------
# 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_reverse (self) :
r = StringIO.StringIO("10 1\n")
a = [0, 0]
b = collatz_read(r, a)
self.assert_(b == True)
self.assert_(a[0] == 10)
self.assert_(a[1] == 1)
def test_read_null (self) :
r = StringIO.StringIO("")
a = [0, 0]
b = collatz_read(r, a)
self.assert_(b == False)
def test_read_multiple (self) :
a = [0, 0]
b = [0, 0]
c = [0, 0]
r = StringIO.StringIO("300 357\n")
d = collatz_read(r, a)
self.assert_(d == True)
self.assert_(a[0] == 300)
self.assert_(a[1] == 357)
r = StringIO.StringIO("678 1000\n")
d = collatz_read(r, b)
self.assert_(d == True)
self.assert_(b[0] == 678)
self.assert_(b[1] == 1000)
r = StringIO.StringIO("1 1000000\n")
d = collatz_read(r, c)
self.assert_(d == True)
self.assert_(c[0] == 1)
self.assert_(c[1] == 1000000)
# ----
# 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):
v = collatz_eval(263, 563)
self.assert_(v == 144)
def test_eval_6(self):
v = collatz_eval(468, 3678)
self.assert_(v == 217)
def test_eval_ascending(self):
v = collatz_eval(200, 300)
self.assert_(v == 128)
def test_eval_descending(self):
v = collatz_eval(300, 200)
self.assert_(v == 128)
def test_eval_singleton(self):
v = collatz_eval(233, 233)
self.assert_(v == 84)
# -----
# 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_null (self) :
w = StringIO.StringIO()
collatz_print(w, '', '', '')
self.assert_(w.getvalue() == " \n")
def test_print_multiple (self) :
w = StringIO.StringIO()
collatz_print(w, 1, 10, 20)
self.assert_(w.getvalue() == "1 10 20\n")
w = StringIO.StringIO()
collatz_print(w, 27, 456, 144)
self.assert_(w.getvalue() == "27 456 144\n")
w = StringIO.StringIO()
collatz_print(w, 356, 100000, 351)
self.assert_(w.getvalue() == "356 100000 351\n")
def test_print_reverse (self) :
w = StringIO.StringIO()
collatz_print(w, 10, 1, 20)
self.assert_(w.getvalue() == "10 1 20\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_single (self) :
r = StringIO.StringIO("256 1000\n")
w = StringIO.StringIO()
collatz_solve(r, w)
self.assert_(w.getvalue() == "256 1000 179\n")
def test_solve_reverse (self) :
r = StringIO.StringIO("1000 256\n")
w = StringIO.StringIO()
collatz_solve(r, w)
self.assert_(w.getvalue() == "1000 256 179\n")
def test_solve_full_range (self) :
r = StringIO.StringIO("1 1000000\n")
w = StringIO.StringIO()
collatz_solve(r, w)
self.assert_(w.getvalue() == "1 1000000 525\n")
# ----
# main
# ----
print "TestCollatz.py"
unittest.main()
print "Done."