def test_std(self):
self.assertEqual(get_column_stats.get_std([1, 2, 3, 4, 5]),
statistics.pstdev([1, 2, 3, 4, 5]))
self.assertEqual(get_column_stats.get_std([0, 0, 0, 0, 0]),
statistics.pstdev([0, 0, 0, 0, 0]))
self.assertEqual(get_column_stats.get_std([-1, -2, -3, -4, -5]),
statistics.pstdev([-1, -2, -3, -4, -5]))
def test_stdev_file(self):
V = []
f = open(self.test_file_name, 'r')
for l in f:
A = [int(x) for x in l.split()]
V.append(A[int(0)])
self.assertEqual(round(get_column_stats.get_std(A), 5),
round(statistics.pstdev(A, statistics.mean(A)), 5))
f.close()
def test_stdev_file_loop(self):
for i in range(100):
self.setUp()
V = []
f = open(self.test_file_name, 'r')
for l in f:
A = [int(x) for x in l.split()]
V.append(A[int(0)])
self.assertEqual(round(get_column_stats.get_std(V), 5),
round(statistics.pstdev(V), 5))
f.close()
def test_stdev(self):
A = [random.randint(0, 1000)
for i in range(random.randint(0, 100))]
self.assertEqual(round(get_column_stats.get_std(A), 5),
round(statistics.pstdev(A, statistics.mean(A)), 5))
def test_string_stdev(self):
self.assertRaises(TypeError,
lambda: get_column_stats.get_std('hello'))
def test_null_stdev(self):
self.assertRaises(TypeError,
lambda: get_column_stats.get_std())
def test_empty_stdev(self):
self.assertRaises(ZeroDivisionError,
lambda: get_column_stats.get_std([]))