def test_copy():
x = IntArray()
for i in range(1000):
iarr.append(x, i)
y = IntArray()
for i in range(1000):
iarr.append(y, 1000 - i)
iarr.copy(x, y)
assert iarr.get(y, 0) == 0
def test_size_increase():
x = IntArray()
for i in range(1000):
iarr.append(x, 3)
def test_append():
x = IntArray()
iarr.append(x, 3)