def test_contains(self):
instance = FrontLinkedList()
instance.add(12)
instance.add(3)
instance.add(456)
self.assertTrue(instance.contains(3))
self.assertFalse(instance.contains("test"))
def test_index_of(self):
instance = FrontLinkedList()
instance.add("first")
instance.add("middle")
instance.add("last")
self.assertEqual(2, instance.index_of("first"))
self.assertEqual(1, instance.index_of("middle"))
self.assertEqual(0, instance.index_of("last"))
def test_contains(self):
instance = FrontLinkedList()
instance.add(12)
instance.add(3)
instance.add(456)
self.assertTrue(instance.contains(3))
self.assertFalse(instance.contains("test"))
def test_add(self):
instance = FrontLinkedList()
self.assertEqual(0, instance.size())
instance.add("test1")
self.assertEqual(1, instance.size())
instance.add("test2")
self.assertEqual(2, instance.size())
def test_pop(self):
instance = FrontLinkedList()
expected = "popped"
instance.add(expected)
instance.add(4)
instance.add(3)
instance.add(2)
instance.add(1)
result = instance.pop()
self.assertFalse(instance.contains("popped"))
self.assertEqual(expected, result)
def test_add(self):
instance = FrontLinkedList()
self.assertEqual(0, instance.size())
instance.add("test1")
self.assertEqual(1, instance.size())
instance.add("test2")
self.assertEqual(2, instance.size())
def test_pop(self):
instance = FrontLinkedList()
expected = "popped"
instance.add(expected)
instance.add(4)
instance.add(3)
instance.add(2)
instance.add(1)
result = instance.pop()
self.assertFalse(instance.contains("popped"))
self.assertEqual(expected, result)
def test_remove_deletes_the_first_occurrence_from_the_front(self):
instance = FrontLinkedList()
instance.add("4")
instance.add("3")
instance.add("2")
instance.add("1")
instance.add("4")
instance.add("0")
instance.remove("4")
counter = 0
next_item = None
for item in instance:
if item.data() == "4":
counter += 1
next_item = item.next()
self.assertEqual(1, counter)
self.assertFalse(next_item)
def test_remove(self):
instance = FrontLinkedList()
for i in range(1, 6):
instance.add(i)
self.assertEqual(5, instance.size())
instance.remove(3)
self.assertEqual(4, instance.size())
for item in instance:
self.assertNotEqual(3, item.data())
def test_remove_deletes_the_first_occurrence_from_the_front(self):
instance = FrontLinkedList()
instance.add("4")
instance.add("3")
instance.add("2")
instance.add("1")
instance.add("4")
instance.add("0")
instance.remove("4")
counter = 0
next_item = None
for item in instance:
if item.data() == "4":
counter += 1
next_item = item.next()
self.assertEqual(1, counter)
self.assertFalse(next_item)
def test_remove(self):
instance = FrontLinkedList()
# No elements
instance.remove(1)
self.assertEqual(0, instance.size())
# One element, which is removed
instance.add(2)
self.assertEqual(1, instance.size())
instance.remove(2)
self.assertEqual(0, instance.size())
# One element, which is not removed
instance.add(5)
self.assertEqual(1, instance.size())
instance.remove(2)
self.assertEqual(1, instance.size())
instance.remove(5) # clear list
# Two elements
instance.add(2)
instance.add("x")
self.assertEqual(2, instance.size())
instance.remove(2)
self.assertEqual(1, instance.size())
# Many elements
for i in range(1, 6):
instance.add(i)
self.assertEqual(6, instance.size())
instance.remove("x")
self.assertEqual(5, instance.size())
for item in instance:
self.assertNotEqual("x", item.data())
def test_index_of(self):
instance = FrontLinkedList()
instance.add("first")
instance.add("middle")
instance.add("last")
self.assertEqual(2, instance.index_of("first"))
self.assertEqual(1, instance.index_of("middle"))
self.assertEqual(0, instance.index_of("last"))
self.assertEqual(-1, instance.index_of("ghost"))
def test_remove(self):
instance = FrontLinkedList()
# No elements
instance.remove(1)
self.assertEqual(0, instance.size())
# One element, which is removed
instance.add(2)
self.assertEqual(1, instance.size())
instance.remove(2)
self.assertEqual(0, instance.size())
# One element, which is not removed
instance.add(5)
self.assertEqual(1, instance.size())
instance.remove(2)
self.assertEqual(1, instance.size())
instance.remove(5) # clear list
# Two elements
instance.add(2)
instance.add("x")
self.assertEqual(2, instance.size())
instance.remove(2)
self.assertEqual(1, instance.size())
# Many elements
for i in range(1, 6):
instance.add(i)
self.assertEqual(6, instance.size())
instance.remove("x")
self.assertEqual(5, instance.size())
for item in instance:
self.assertNotEqual("x", item.data())
