def test_to():
stm = Array.range(5, 8).to_stream()
assert type(stm) is Stream
assert stm.to_list() == [5, 6, 7]
def test_slice():
alist = Array.range(10, 20)
assert alist[:5] == Array.range(10, 15)
assert alist[-3:] == Array.range(17, 20)
assert alist.take(5) == Array.range(10, 15)
assert alist.drop(3) == Array.range(13, 20)
assert alist.drop(10) == Array()
assert alist.drop(20) == Array()
assert alist.takeright(3) == Array.range(17, 20)
assert alist.dropright(3) == Array.range(10, 17)
assert alist.tail() == Array.range(11, 20)
assert alist.butlast() == Array.range(10, 19)
assert alist.slice(3, 5) == Array.range(13, 15)
assert alist[3:5] == Array.range(13, 15)
def less_than_15(n):
return n < 15
assert alist.takewhile(less_than_15) == Array.range(10, 15)
assert alist.dropwhile(less_than_15) == Array.range(15, 20)
def test_init():
alist = Array([1, 2, 3])
assert alist == Array.range(1, 4)
alist = Array((1, 2, 3))
assert alist == Array.range(1, 4)