def test_input_2_1(self):
prices = [2,1]
self.assertEqual(solution.maxProfit(prices), 0)
def test_inpit_1111(self):
prices = [1,1,1,1,1,1,1,1]
self.assertEqual(solution.maxProfit(prices),0)
def test_empty(self):
prices = []
self.assertEqual(solution.maxProfit(prices), 0)
from solution import maxProfit assert maxProfit([7, 1, 5, 3, 6, 4]) == 5 assert maxProfit([7, 6, 4, 3, 1]) == 0 assert maxProfit([1]) == 0 #empty array assert maxProfit([]) == 0