def test_dutch_flag__three_elements_sorted_ascending_pivot_middle(self):
a, pivot_index = [0, 1, 2], 1
b = dutch_flag(pivot_index, a)
assert b == [0, 1, 2]
def test_dutch_flag__array_2(self):
a, pivot_index = [2, 2, 0, 1, 1, 1], 2
b = dutch_flag(pivot_index, a)
assert b == [0, 2, 1, 2, 1, 1]
def test_dutch_flag__three_elements_sorted_ascending_pivot_start(self):
a, pivot_index = [0, 1, 2], 0
b = dutch_flag(pivot_index, a)
assert b == [0, 2, 1]
def test_dutch_flag__palindromic_array(self):
a, pivot_index = [2, 0, 1, 0, 2], 2
b = dutch_flag(pivot_index, a)
assert b == [0, 0, 1, 2, 2]
def test_dutch_flag__three_elements_sorted_descending(self):
a, pivot_index = [2, 1, 0], 1
b = dutch_flag(pivot_index, a)
assert b == [0, 1, 2]