class TestUpheap(unittest.TestCase): def setUp(self): self.h = Heap() self.h.insert(5, 'Five') def test_once_left(self): self.h.heap.append(Node(3, 'Three')) self.h._upheap(1) self.assertEqual(self.h.heap[0].val, 'Three') self.assertEqual(self.h.heap[1].val, 'Five') def test_once_right(self): self.h.insert(8, 'Eight') self.h.heap.append(Node(3, 'Three')) self.h._upheap(2) self.assertEqual(self.h.heap[0].val, 'Three') self.assertEqual(self.h.heap[2].val, 'Five') def test_many(self): self.h.insert(3, 'Three') self.h.insert(8, 'Eight') self.h.insert(10, 'Ten') self.h.insert(13, 'Thirteen') self.h.insert(11, 'Eleven') self.h.insert(12, 'Twelve') self.h.insert(4, 'Four') self.h.heap.append(Node(2, 'Two')) self.h._upheap(len(self.h.heap) - 1) self.assertEqual(self.h.heap[0].val, 'Two')