def test_run_2 (self) :
cycle = collatz_run(3)
self.assert_(cycle == 8)
def test_run_3 (self) :
cycle = collatz_run(9)
self.assert_(cycle == 20)
def test_run_1 (self) :
cycle = collatz_run(1)
self.assert_(cycle == 1)
def test_run_4(self):
"""
test 4
"""
value = collatz_run(900, 1000)
self.assertEqual(value, 174)
def test_run_3(self):
"""
test 3
"""
value = collatz_run(201, 210)
self.assertEqual(value, 89)
def test_run_2(self):
"""
test 2
"""
value = collatz_run(100, 200)
self.assertEqual(value, 125)
def test_run_1(self):
"""
test 1
"""
value = collatz_run(1, 10)
self.assertEqual(value, 20)
