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96 lines
1.9 KiB
Python
96 lines
1.9 KiB
Python
"""
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Unit Tests for the Linked Lists implementations
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@jlengrand
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2013/12
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"""
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from ll import SingleListItem
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from ll import SingleLinkedList
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import unittest
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class test_single_linked_list_item(unittest.TestCase):
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def test_item(self):
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a = 12
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t = SingleListItem(12)
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self.assertEqual(a, t.value)
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def test_has_next(self):
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a = 12
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t = SingleListItem(12)
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self.assertEqual(False, t.has_next())
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b = SingleListItem(13, t)
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self.assertEqual(True, b.has_next())
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class test_single_linked_list(unittest.TestCase):
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def test_add(self):
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a = 12
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sl = SingleLinkedList()
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sl.add(a)
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self.assertEqual(1, len(sl))
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sl.add(a)
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self.assertEqual(2, len(sl))
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def test_delete_item(self):
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sl = SingleLinkedList()
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sl.add(1)
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sl.add(2)
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sl.add(3)
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self.assertEqual(3, len(sl))
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self.assertEqual(1, sl._root.value)
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self.assertRaises(Exception, lambda x : sl.delete_item(4))
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sl.delete_item()
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self.assertEqual(2, len(sl))
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self.assertEqual(2, sl._root.value)
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sl.add(4)
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sl.add(5)
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sl.add(6)
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sl.delete_item(len(sl) - 1)
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self.assertEqual("2, 3, 4, 5", sl.__str__())
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sl.delete_item(1)
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self.assertEqual("2, 4, 5", sl.__str__())
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sl.delete_item()
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self.assertEqual("4, 5", sl.__str__())
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def test_delete(self):
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sl = SingleLinkedList()
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sl.add(2)
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sl.add(1)
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sl.add(3)
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self.assertEqual(3, len(sl))
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self.assertEqual(2, sl._root.value)
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self.assertRaises(Exception, lambda x: sl.delete(4))
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sl.delete(1)
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self.assertEqual("2, 3", sl.__str__())
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sl.delete(2)
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self.assertEqual("3", sl.__str__())
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sl.delete(3)
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self.assertEqual("Empty List", sl.__str__())
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self.assertEqual(0, len(sl))
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if __name__ == "__main__":
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unittest.main()
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