def testSymbol(self):
parser = Parser('@abc')
parser.advance()
self.assertEqual('abc', parser.symbol)
parser = Parser('(abc)')
parser.advance()
self.assertEqual('abc', parser.symbol)
parser = Parser('foobar')
parser.advance()
self.assertRaises(RuntimeError, lambda: parser.symbol)
def test_parse_label(self):
parser = Parser()
lines_to_parse = ['(LABEL)']
parsed_lines = parser.parse(lines_to_parse)
self.assertEqual(parsed_lines, [Label('LABEL')])
def testHasMoreCommandsAndAdvance(self):
parser = Parser('')
self.assertFalse(parser.hasMoreCommands)
parser = Parser('hello')
self.assertEqual(None, parser.currentCommand)
self.assertTrue(parser.hasMoreCommands)
parser.advance()
self.assertFalse(parser.hasMoreCommands)
self.assertRaises(EOFError, parser.advance)
parser = Parser('// this is a comment')
self.assertFalse(parser.hasMoreCommands)
parser = Parser('foobar // this is a command')
self.assertTrue(parser.hasMoreCommands)
def test_parse_comment(self):
parser = Parser()
lines_to_parse = ['//test']
parsed_lines = parser.parse(lines_to_parse)
self.assertEqual(parsed_lines, [])
def test_parse_lines_c_instruction2(self):
parser = Parser()
lines_to_parse = ['D;JGT']
parsed_lines = parser.parse(lines_to_parse)
self.assertEqual(parsed_lines, [CInstruction('D', None, 'JGT')])
def test_parse_lines_c_instruction1(self):
parser = Parser()
lines_to_parse = ['D=M']
parsed_lines = parser.parse(lines_to_parse)
self.assertEqual(parsed_lines, [CInstruction('M', 'D', None)])
def test_parse_lines_a_instruction2(self):
parser = Parser()
lines_to_parse = ['@2']
parsed_lines = parser.parse(lines_to_parse)
self.assertEqual(parsed_lines, [AInstruction('2')])
def testDestCompJump(self):
parser = Parser('dest=comp;JMP')
parser.advance()
self.assertEqual('dest', parser.dest)
self.assertEqual('comp', parser.comp)
self.assertEqual('JMP', parser.jump)
parser = Parser('dest = comp ; JMP')
parser.advance()
self.assertEqual('dest', parser.dest)
self.assertEqual('comp', parser.comp)
self.assertEqual('JMP', parser.jump)
parser = Parser('dest=comp')
parser.advance()
self.assertEqual('dest', parser.dest)
self.assertEqual('comp', parser.comp)
self.assertEqual('null', parser.jump)
parser = Parser('comp;JMP')
parser.advance()
self.assertEqual('null', parser.dest)
self.assertEqual('comp', parser.comp)
self.assertEqual('JMP', parser.jump)
parser = Parser('comp')
parser.advance()
self.assertEqual('null', parser.dest)
self.assertEqual('comp', parser.comp)
self.assertEqual('null', parser.jump)
parser = Parser('@abc')
parser.advance()
self.assertRaises(RuntimeError, lambda: parser.dest)
self.assertRaises(RuntimeError, lambda: parser.comp)
self.assertRaises(RuntimeError, lambda: parser.jump)
def testInit(self):
Parser('')
Parser(open('./tests.py'))
def init(stream):
return Parser(stream)
