def test_jump_lt_zero(self):
line = 'D=A;JLT'
instruction = assembler.parse_c_instruction(line)
expected_jump_code = '100'
self.assertEqual(expected_jump_code, instruction[13:])
def test_no_jump(self):
line = 'D=A'
instruction = assembler.parse_c_instruction(line)
expected_jump_code = '000'
self.assertEqual(expected_jump_code, instruction[13:])
def test_unconditional_jump(self):
line = 'D=A;JMP'
instruction = assembler.parse_c_instruction(line)
expected_jump_code = '111'
self.assertEqual(expected_jump_code, instruction[13:])
def test_store_md(self):
line = 'MD=0;JMP'
instruction = assembler.parse_c_instruction(line)
expected_dest_code = '011'
self.assertEqual(expected_dest_code, instruction[10:13])
def test_store_nowhere(self):
line = '0;JMP'
instruction = assembler.parse_c_instruction(line)
expected_dest_code = '000'
self.assertEqual(expected_dest_code, instruction[10:13])
def test_m_minus_d(self):
line = 'D=A-D;JNE'
instruction = assembler.parse_c_instruction(line)
expected_comp_code = '000111'
self.assertEqual(expected_comp_code, instruction[4:10])
def test_a_and_d(self):
line = 'M=A&D;JLE'
instruction = assembler.parse_c_instruction(line)
expected_comp_code = '000000'
self.assertEqual(expected_comp_code, instruction[4:10])
def test_a_flag_default(self):
line = 'D=1'
instruction = assembler.parse_c_instruction(line)
expected_a_flag = '0'
self.assertEqual(expected_a_flag, instruction[3])
def test_a_flag_a(self):
line = 'D=D+M'
instruction = assembler.parse_c_instruction(line)
expected_a_flag = '1'
self.assertEqual(expected_a_flag, instruction[3])
def test_op_code(self):
line = 'AMD=0;JMP'
instruction = assembler.parse_c_instruction(line)
expected_op_code = '111'
self.assertEqual(expected_op_code, instruction[:3])