def testPrependPeek(self):
linkedList = LinkedList()
linkedList.append("debut")
for i in range(5):
linkedList.prepend(i)
self.assertEqual(linkedList.check(), i)
self.assertFalse(linkedList.isEmpty())
self.assertEqual(linkedList.size(), i + 2)
listSize = linkedList.size()
for i in range(4, -1, -1):
self.assertEqual(linkedList.peek(), i)
self.assertFalse(linkedList.isEmpty())
listSize -= 1
self.assertEqual(linkedList.size(), listSize)
self.assertEqual(linkedList.peek(), "debut")
self.assertTrue(linkedList.isEmpty())
self.assertEqual(linkedList.size(), 0)
self.assertRaises(ValueError, linkedList.check)
self.assertRaises(ValueError, linkedList.peek)
class LinkedListTest(unittest.TestCase):
def setUp(self):
self.linkedList = LinkedList()
# Test __init__()
def test_a_Init(self):
self.assertTrue(self.linkedList.first == None)
self.assertTrue(self.linkedList.n == 0)
# Test __init__() -> IsEmpty() -> size() -> check() -> peek() -> append() -> size() -> check() -> peek()
def test_b_IsEmptyThenAppendThenIsNotEmpty(self):
self.assertTrue(self.linkedList.isEmpty())
self.assertEqual(self.linkedList.size(), 0)
self.assertRaises(ValueError, self.linkedList.check)
self.assertRaises(ValueError, self.linkedList.peek)
self.linkedList.append('test')
self.assertFalse(self.linkedList.isEmpty())
self.assertEqual(self.linkedList.size(), 1)
self.assertEqual(self.linkedList.check().value, 'test')
self.assertEqual(self.linkedList.peek().value, 'test')
self.assertTrue(self.linkedList.isEmpty())
self.assertEqual(self.linkedList.size(), 0)
self.linkedList.append('test1')
self.linkedList.append('test2')
self.linkedList.append('test3')
self.assertFalse(self.linkedList.isEmpty())
self.assertEqual(self.linkedList.size(), 3)
self.assertEqual(self.linkedList.check().value, 'test1')
self.assertEqual(self.linkedList.peek().value, 'test1')
self.assertEqual(self.linkedList.size(), 2)
self.assertEqual(self.linkedList.peek().value, 'test2')
self.assertEqual(self.linkedList.size(), 1)
self.assertEqual(self.linkedList.peek().value, 'test3')
self.assertEqual(self.linkedList.size(), 0)
self.assertTrue(self.linkedList.isEmpty())
# Test __init__() -> IsEmpty() -> Prepend() -> Prepend() -> check() -> peek()
def test_c_Prepend(self):
self.assertTrue(self.linkedList.isEmpty())
self.linkedList.prepend('test1')
self.linkedList.prepend('test2')
self.assertEqual(self.linkedList.check().value, 'test2')
self.assertEqual(self.linkedList.peek().value, 'test2')
self.assertEqual(self.linkedList.peek().value, 'test1')
self.assertTrue(self.linkedList.isEmpty())
def test_02_should_prepend_new_element_to_first_position(self):
testList = LinkedList()
testList.prepend(5)
testList.prepend(6)
self.assertEqual(testList.first.value, 6)
self.assertEqual(testList.n, 2)
def test_02_should_prepend_new_element_with_an_empty_list(self):
testList = LinkedList()
testList.prepend(5)
self.assertEqual(testList.first.value, 5)
def test_02_should_prepend_new_element_to_first_position(self):
testList = LinkedList()
testList.prepend(5)
testList.prepend(6)
self.assertEqual(testList.list[0], 6)
self.assertEqual(testList.size(), 2)