from creole import *
import unittest
import ffi

class PushTest(unittest.TestCase):
	def test_parse_push_reg(self):
		p = Program()
		p.parse_asm_line("push r5")
		b = p()
		self.assertEqual(b, b'\x01\xC2\x80\x00')
		ins = ffi.parse_line(b)
		self.assertEqual(ins[0], instructions["push"].opcode)
		self.assertEqual(ins[1][0], (1,5))

	def test_parse_push_catch_typecheck_push_imm(self):
		p = Program()
		with self.assertRaises(TypecheckException) as cm:
			p.parse_asm_line("push 0")
		self.assertEqual(cm.exception.argtype, ArgType.REG)
		self.assertEqual(cm.exception.sarg, '0')
		self.assertEqual(cm.exception.i, 0)
		self.assertEqual(cm.exception.opcode, 1)

	def test_parse_push_catch_typecheck_push_lab(self):
		p = Program()
		with self.assertRaises(TypecheckException) as cm:
			p.parse_asm_line("push l0")
		self.assertEqual(cm.exception.argtype, ArgType.REG)
		self.assertEqual(cm.exception.sarg, 'l0')
		self.assertEqual(cm.exception.i, 0)
		self.assertEqual(cm.exception.opcode, 1)

	def test_parse_push_catch_typecheck_argument_overflow(self):
		p = Program()
		with self.assertRaises(TypecheckLenException) as cm:
			p.parse_asm_line("push r1 r2")
		self.assertEqual(cm.exception.opcode, 1)
		self.assertEqual(cm.exception.insargs, ["r1", "r2"])
		self.assertEqual(cm.exception.argtypelen, 1)

	def test_parse_push_catch_typecheck_argument_underflow(self):
		p = Program()
		with self.assertRaises(TypecheckLenException) as cm:
			p.parse_asm_line("push")
		self.assertEqual(cm.exception.opcode, 1)
		self.assertEqual(cm.exception.insargs, [])
		self.assertEqual(cm.exception.argtypelen, 1)

	def test_large_reg(self):
		p = Program(regnum=0x8000000)
		p.parse_asm_line("PUSH r134217727")
		b = p()
		self.assertEqual(b, b'\x01\xFC\x87\xbf\xbf\xbf\xbf\x00')

class ProgramTest(unittest.TestCase):
	def test_two(self):
		p = Program()
		p.parse_asm_line("PUSH r1")
		p.parse_asm_line("ADD r1 5 6")
		b = p()
		self.assertEqual(b, b'\x01\xC2\x81\x00\x03\xC2\x81\xC0\x85\xC0\x86\x00')
	def test_label(self):
		p = Program()
		b_ex = bytes()
		p.parse_asm_line("CLB l0")
		b_ex = b_ex + b'\x07\xC0\x80\x00'
		p.parse_asm_line("pop r0")
		b_ex = b_ex + b'\x02\xC2\x80\x00'
		p.parse_asm_line("pop r1")
		b_ex = b_ex + b'\x02\xC2\x81\x00'
		p.parse_asm_line("mul r2 r0 r1")
		b_ex = b_ex + b'\x04\xC2\x82\xC2\x80\xC2\x81\x00'
		p.parse_asm_line("push r2")
		b_ex = b_ex + b'\x01\xC2\x82\x00'
		p.parse_asm_line("push r2")
		b_ex = b_ex + b'\x01\xC2\x82\x00'
		p.parse_asm_line("jl l0 r2 10")
		b_ex = b_ex + b'\x06\xC0\x80\xC2\x82\xC0\x8A\x00'
		b = p()
		self.assertEqual(b, b_ex)

	def test_parse_imm(self):
		p = Program()
		p.parse_asm_line("add r1 23 3648")
		ins = ffi.parse_line(p())
		self.assertEqual(ins[0], instructions["add"].opcode)
		self.assertEqual(ins[1][0], (1,1))
		self.assertEqual(ins[1][1], (0,23))
		self.assertEqual(ins[1][2], (0,3648))

if __name__ == "__main__":
	unittest.main()