def test_is_empty(self):
fifo = FIFOQueue()
self.assertTrue(fifo.is_empty(), "New queue should be empty")
fifo.add(1)
self.assertFalse(fifo.is_empty(), "Queue with added element shouldn't be empty")
fifo.pop()
self.assertTrue(fifo.is_empty(), "When all elements removed from a queue it should be empty")
def test_pop_add(self):
fifo = FIFOQueue()
fifo.add(1)
fifo.add(2)
fifo.add(3)
self.assertEqual(3, fifo.length())
self.assertEqual(1, fifo.pop())
self.assertEqual(2, fifo.pop())
self.assertEqual(3, fifo.pop())
def test_pop_add(self):
fifo = FIFOQueue()
fifo.add(1)
fifo.add(2)
fifo.add(3)
self.assertEqual(3, fifo.length())
self.assertEqual(1, fifo.pop())
self.assertEqual(2, fifo.pop())
self.assertEqual(3, fifo.pop())
def test_is_empty(self):
fifo = FIFOQueue()
self.assertTrue(fifo.is_empty(), "New queue should be empty")
fifo.add(1)
self.assertFalse(fifo.is_empty(),
"Queue with added element shouldn't be empty")
fifo.pop()
self.assertTrue(
fifo.is_empty(),
"When all elements removed from a queue it should be empty")
def test_remove(self):
fifo = FIFOQueue()
fifo.add(1)
fifo.add(2)
fifo.add(3)
self.assertFalse(fifo.remove(5))
self.assertTrue(fifo.remove(2))
self.assertEqual(2, fifo.length())
self.assertEqual(1, fifo.pop())
self.assertEqual(3, fifo.pop())
def test_remove(self):
fifo = FIFOQueue()
fifo.add(1)
fifo.add(2)
fifo.add(3)
self.assertFalse(fifo.remove(5))
self.assertTrue(fifo.remove(2))
self.assertEqual(2, fifo.length())
self.assertEqual(1, fifo.pop())
self.assertEqual(3, fifo.pop())
