forked from cs327e-spring-2014/collatz-tests
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xw0902-TestCollatz.py
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xw0902-TestCollatz.py
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#!/usr/bin/env python
"""
To test the program:
% python TestCollatz.py > TestCollatz.out
% chmod ugo+x TestCollatz.py
% TestCollatz.py > TestCollatz.out
"""
# -------
# imports
# -------
import io
import unittest
from Collatz import collatz_read,_calc_cycle_length, collatz_eval, collatz_print, collatz_solve
# -----------
# TestCollatz
# -----------
class TestCollatz (unittest.TestCase) :
# ----
# read
# ----
# Normal test
def test_read_1(self) :
r = io.StringIO(unicode("1 10\n"))
a = [0, 0]
b = collatz_read(r, a)
i, j = a
self.assertTrue(b == True)
self.assertTrue(i == 1)
self.assertTrue(j == 10)
# Failure test- empty string
def test_read_2 (self) :
r = io.StringIO(unicode(""))
a = [0, 0]
b = collatz_read(r, a)
self.assertTrue(b == False)
# Corner test- same number
def test_read_3 (self) :
r = io.StringIO(unicode("1 1\n"))
a = [0, 0]
b = collatz_read(r, a)
i, j = a
self.assertTrue(b == True)
self.assertTrue(i == 1)
self.assertTrue(j == 1)
# Corner test- more than two numbers in a line
def test_read_4 (self) :
r = io.StringIO(unicode("1 10 50\n"))
a = [0, 0]
b = collatz_read(r, a)
i, j = a
self.assertTrue(b == True)
self.assertTrue(i == 1)
self.assertTrue(j == 10)
# ----
# _calc_cycle_length
# ----
# Normal test #1
def test_calc_1 (self) :
cycle_length = _calc_cycle_length(5)
self.assertTrue(cycle_length == 6)
# Normal test #2
def test_calc_2 (self) :
cycle_length = _calc_cycle_length(20)
self.assertTrue(cycle_length == 8)
# Corner test- boundary case
def test_calc_3 (self) :
cycle_length = _calc_cycle_length(1)
self.assertTrue(cycle_length == 1)
# ----
# eval
# ----
# Normal test #1
def test_eval_1 (self) :
v = collatz_eval(1, 10)
self.assertTrue(v == 20)
# Normal test #2
def test_eval_2 (self) :
v = collatz_eval(201, 210)
self.assertTrue(v == 89)
# Corner test- same number
def test_eval_3 (self) :
v = collatz_eval(1, 1)
self.assertTrue(v == 1)
# Corner test- reverse order
def test_eval_4 (self) :
v = collatz_eval(10, 1)
self.assertTrue(v == 20)
# -----
# print
# -----
# Normal test #1
def test_print_1 (self) :
w = io.StringIO()
collatz_print(w, 100, 200, 125)
self.assertTrue(w.getvalue() == "100 200 125\n")
# Normal test #2
def test_print_2 (self) :
w = io.StringIO()
collatz_print(w, 900, 1000, 174)
self.assertTrue(w.getvalue() == "900 1000 174\n")
# Corner test- same number
def test_print_3 (self) :
w = io.StringIO()
collatz_print(w, 1, 1, 1)
self.assertTrue(w.getvalue() == "1 1 1\n")
# Corner test- reverse order
def test_print_4 (self) :
w = io.StringIO()
collatz_print(w, 10, 1, 20)
self.assertTrue(w.getvalue() == "10 1 20\n")
# -----
# solve
# -----
# Normal test
def test_solve_1 (self) :
r = io.StringIO(unicode("1 10\n100 200\n201 210\n900 1000\n"))
w = io.StringIO()
collatz_solve(r, w)
self.assertTrue(w.getvalue() == "1 10 20\n100 200 125\n201 210 89\n900 1000 174\n")
# Corner test- same number
def test_solve_2 (self) :
r = io.StringIO(unicode("1 1\n9 9\n"))
w = io.StringIO()
collatz_solve(r, w)
self.assertTrue(w.getvalue() == "1 1 1\n9 9 20\n")
# Corner test- reverse order
def test_solve_3 (self) :
r = io.StringIO(unicode("10 1\n200 100\n"))
w = io.StringIO()
collatz_solve(r, w)
self.assertTrue(w.getvalue() == "10 1 20\n200 100 125\n")
# ----
# main
# ----
print("TestCollatz.py")
unittest.main()
print("Done.")