def test_order():
r = registers.Registers()
s = stack.Stack(r)
s.push(1)
s.push(2)
s.push(3)
assert s.pop() == 3
assert s.pop() == 2
assert s.pop() == 1
def init_kernel(stdin=None):
r = ram.RAM(256)
# Fill up RAM with 1's to be certain that 0 termination works
r.load([1] * 256)
s = stack.Stack(registers.Registers())
k = kernel.Kernel(r, s)
if stdin:
k.filenumber_mapping[0] = io.StringIO(stdin)
return k
def test_changing_sp():
r = registers.Registers()
s = stack.Stack(r)
assert r.sp == 0
s.push(0)
assert r.sp == 1
s.push(1)
assert r.sp == 2
s.pop()
assert r.sp == 1
s.pop()
assert r.sp == 0
def test_init():
r = registers.Registers()
for i in range(4):
assert r.get(i) == 0
def test_persistence():
r = registers.Registers()
r.set(0b00, 26)
assert r.get(0b00) == 26
def test_str():
r = registers.Registers()
for i in range(4):
r.set(i, i)
assert str(r) == "[0, 1, 2, 3] IP=0, SP=0"
def test_push_pop():
r = registers.Registers()
s = stack.Stack(r)
s.push(12)
assert s.pop() == 12