def do_playground(request):
code = request.POST["code"]
a = Assembler()
rom, errors = a.assemble(code)
# Save this in the database.
ACR = AssemblyChallengeResponse()
try:
ACR.student = Student.from_request(request)
except exceptions.ObjectDoesNotExist:
pass
ACR.code = code
ACR.save()
# Either run the game in the browser or download it.
request.session["rom"] = rom
if "run" in request.POST or len(errors) > 0:
return render(request, "assembler_playground.html", {"source_code": request.POST["code"], "errors": errors})
else:
return get_rom(request)
def setUp(self):
self.A = Assembler()
class TestAssembler(TestCase):
def setUp(self):
self.A = Assembler()
# When multiple lines are passed to the parser, they are broken into
# four-tuples.
def test_parse_lines(self):
tokens = self.A.parse("""
; This line is a comment
; As is this one. All five lines should be completely empty.
; This one too lol
""")
self.assertEquals( 5, len(tokens) )
for l,o,a,orig in tokens:
self.assertEquals( (a,b,c), (None,None,None))
# When lines are passed to the parser, capital letters are made to lowercase
def test_parse_labels(self):
l,o,a,orig = self.A.parse("TeST: FoO; comment")[0]
self.assertEquals( l, "test" )
self.assertEquals( o, "foo" )
self.assertEquals( a, None )
# When lines are passed to the parser, whitespace is stripped from arguments
def test_parse_lines(self):
l,o,a,orig = self.A.parse("TEST:FOO arg + arg - 3 ; car")[0]
self.assertEquals( l, "test" )
self.assertEquals( o, "foo" )
self.assertEquals( a, "arg+arg-3" )
# When lines are passed to the parser, the original line is saved in the
# fourth element of the tuple.
def test_parse_lines(self):
l,o,a,orig = self.A.parse("This is a test; original")[0]
self.assertEquals( l, None )
self.assertEquals( o, "this" )
self.assertEquals( a, "isatest" )
self.assertEquals( orig, "(code) Line 1: This is a test; original" )
# This method tests all ten of the addressing modes based on the format of
# the argument. For special cases, like LDX and STX, those are converted
# internally.
def test_addrmode(self):
M_IMPLIED = 0
M_REGISTER = 1
M_IMMEDIATE = 2
M_ZEROPAGE = 3
M_ZEROPAGE_X = 4
M_ABSOLUTE = 5
M_ABSOLUTE_X = 6
M_ABSOLUTE_Y = 7
M_INDIRECT_X = 8
M_INDIRECT_Y = 9
# All of the following are legal constructs.
self.assertEquals( self.A.addrmode(None), (M_IMPLIED, None) )
self.assertEquals( self.A.addrmode(""), (M_IMPLIED, None) )
self.assertEquals( self.A.addrmode("a"), (M_REGISTER, None) )
self.assertEquals( self.A.addrmode("#label"), (M_IMMEDIATE, "label") )
self.assertEquals( self.A.addrmode("#$42"), (M_IMMEDIATE, "$42") )
self.assertEquals( self.A.addrmode("#$4242"), (M_IMMEDIATE, "$4242") )
self.assertEquals( self.A.addrmode("$42"), (M_ZEROPAGE, "$42") )
self.assertEquals( self.A.addrmode(">$4242"), (M_ZEROPAGE, ">$4242") )
self.assertEquals( self.A.addrmode("-5"), (M_ZEROPAGE, "-5") )
self.assertEquals( self.A.addrmode(">label"), (M_ZEROPAGE, ">label") )
self.assertEquals( self.A.addrmode(">label,x"), (M_ZEROPAGE_X, ">label") )
self.assertEquals( self.A.addrmode("label"), (M_ABSOLUTE, "label") )
self.assertEquals( self.A.addrmode("$4242"), (M_ABSOLUTE, "$4242") )
self.assertEquals( self.A.addrmode("$4242,x"), (M_ABSOLUTE_X, "$4242") )
self.assertEquals( self.A.addrmode("$4242,y"), (M_ABSOLUTE_Y, "$4242") )
self.assertEquals( self.A.addrmode("$42,y"), (M_ABSOLUTE_Y, "$42") )
self.assertEquals( self.A.addrmode("($42,x)"), (M_INDIRECT_X, "$42") )
self.assertEquals( self.A.addrmode("($42),y"), (M_INDIRECT_Y, "$42") )
# This tests how some errors are taken care of - the addrmode function
# does not complain, it simply pretends that the thing is a number and
# tries to parse it.
self.assertEquals( self.A.addrmode("($42,y)"), (M_ABSOLUTE, "($42,y)") )
# This tests the number parsing system. Numbers support the most basic
# arithmetic: addition and subtraction, and don't support anything fancy
# like parens or multiplication.
def test_nums(self):
self.A.labels["test"] = 100
self.A.labels["*"] = 42
self.assertEquals( self.A.num("0x42"), 0x42 )
self.assertEquals( self.A.num("0x42+0x42"), 0x84 )
self.assertEquals( self.A.num("0x42+0x42+0x1"), 0x85 )
self.assertEquals( self.A.num("0x42-0x42"), 0 )
self.assertEquals( self.A.num("0x42-0x42+0x1"), 1 )
self.assertEquals( self.A.num("-0x42"), 0xffbe ) #negative
self.assertEquals( self.A.num("-test"), 0xff9c ) #negative
self.assertEquals( self.A.num(">0x1234"), 0x34 )
self.assertEquals( self.A.num("<0x1234"), 0x12 )
self.assertEquals( self.A.num("test+*"), 142 )
# This tests parsing hex, binary, octal, and decimal numbers.
def test_parsenum(self):
self.A.labels["test"] = 100
self.A.labels["*"] = 42
self.assertEquals( self.A.parsenum("0x42"), 0x42 )
self.assertEquals( self.A.parsenum("$42"), 0x42 )
self.assertEquals( self.A.parsenum("042"), 042 )
self.assertEquals( self.A.parsenum("@42"), 042 )
self.assertEquals( self.A.parsenum("42"), 42 )
self.assertEquals( self.A.parsenum("0b1001"), 0b1001 )
self.assertEquals( self.A.parsenum("%1001"), 0b1001 )
self.assertEquals( self.A.parsenum("test"), 100 )
self.assertEquals( self.A.parsenum("*"), 42 )
self.assertEquals( self.A.parsenum("fake"), 0 )
self.assertEquals( self.A.errors[0], "[Unknown label: 'fake'] ")
