def test_equals(self):
sa = Stack()
sb = Stack()
sc = Stack()
self.assertEqual(sa, sb)
for i in range(50):
n = random.randint(1, 1000)
sa.push(n)
self.assertNotEqual(sa, sb)
while (not sa.is_empty()):
k = sa.pop()
sb.push(k)
sc.push(k)
self.assertEqual(sb, sc)
while (not sb.is_empty()):
k = sb.pop()
sa.push(k)
while (not sc.is_empty()):
k = sc.pop()
sb.push(k)
self.assertEqual(sa, sb)
def test_push(self):
s = Stack()
self.assertTrue(s.is_empty())
s.push('a')
self.assertFalse(s.is_empty())
for i in range(50):
n = random.randint(0, 1000)
s.push(n)
self.assertEqual(s.peek(), n)
def test_is_empty(self):
s = Stack()
self.assertTrue(s.is_empty())
for i in range(10):
s.push(i)
self.assertFalse(s.is_empty())
for i in range(10):
s.pop()
self.assertTrue(s.is_empty())
def test_str(self):
s = Stack()
self.assertEqual(str(s), '')
for i in range(5):
s.push(i)
self.assertEqual(str(s), '4\n3\n2\n1\n0')
s.pop()
s.pop()
self.assertEqual(str(s), '2\n1\n0')
s.pop()
s.push(300)
s.push(10)
self.assertEqual(str(s), '10\n300\n1\n0')
while (not s.is_empty()):
s.pop()
n = random.randint(1, 365)
s.push(n)
self.assertEqual(str(s), str(n))