def test_heap_sort_with_heap_construction():
heap = Heap([1, 9, 7, 4, 3, 8])
expected = [1, 3, 4, 7, 8, 9]
output = heap.heap_sort()
assert output == expected
def test_heap_sort_with_full_heap():
heap = Heap([9, 4, 8, 1, 3, 7])
expected = [1, 3, 4, 7, 8, 9]
output = heap.heap_sort()
assert output == expected
def test_heap_sort_one_element_heap():
heap = Heap([9])
expected = [9]
output = heap.heap_sort()
assert output == expected
def test_heap_sort_with_already_sorted():
heap = Heap([1, 3, 4, 7, 8, 9])
expected = [1, 3, 4, 7, 8, 9]
output = heap.heap_sort()
assert output == expected
def test_heap_sort_empty_heap():
heap = Heap()
expected = []
output = heap.heap_sort()
assert output == expected
