def run_string(string):
tokens = OysterScanner(string).tokenize()
statements = OysterParser().parse(tokens)
instructions = [
Instruction(Instruction.CODE, statement)
for statement in statements.items
]
instructions.reverse()
env = populate_globals(Env(None, None))
stack = [StackFrame(instructions, env)]
cur = None
while stack:
cur = eval(stack, cur)
print "Result is", cur.__str__()
def setUp(self):
self.lexical_environment = Env(None, None)
self.calling_environment = Env(None, None)
self.local = Env(self.lexical_environment,
self.calling_environment)
class EnvironmentTests(TestCase):
def setUp(self):
self.lexical_environment = Env(None, None)
self.calling_environment = Env(None, None)
self.local = Env(self.lexical_environment,
self.calling_environment)
def test_local_set(self):
self.local.set("a", 5)
self.assertEqual(self.local.this_environment["a"], 5)
def test_local_lookup(self):
self.local.set("a", 5)
self.assertEqual(self.local.lookup("a"), 5)
def test_leaked_lookup(self):
self.calling_environment.set("a", 6)
self.local.leak("a")
self.assertEqual(self.local.lookup("a"), 6)
def test_leaked_set(self):
self.calling_environment.set("a", 6)
self.local.leak("a")
self.local.set("a", 10)
self.assertEqual(self.calling_environment.this_environment["a"], 10)
def test_lexical_environment_lookup(self):
self.lexical_environment.set("a", 15)
self.assertEqual(self.local.lookup("a"), 15)
def test_alter_set(self):
self.local.alter("a")
self.local.set("a", 20)
self.assertEqual(self.local.lookup("a"), 20)
self.assertEqual(self.lexical_environment.this_environment["a"], 20)
def test_default_lookup(self):
self.calling_environment.set("a", 6)
self.lexical_environment.set("a", 12)
self.assertEqual(self.local.lookup("a"), 12)
def setUp(self):
self.env = populate_globals(Env(None, None))
def setUp(self):
self.lexical_environment = Env(None, None)
self.calling_environment = Env(None, None)
self.local = Env(self.lexical_environment, self.calling_environment)
class EnvironmentTests(TestCase):
def setUp(self):
self.lexical_environment = Env(None, None)
self.calling_environment = Env(None, None)
self.local = Env(self.lexical_environment, self.calling_environment)
def test_local_set(self):
self.local.set("a", 5)
self.assertEqual(self.local.this_environment["a"], 5)
def test_local_lookup(self):
self.local.set("a", 5)
self.assertEqual(self.local.lookup("a"), 5)
def test_leaked_lookup(self):
self.calling_environment.set("a", 6)
self.local.leak("a")
self.assertEqual(self.local.lookup("a"), 6)
def test_leaked_set(self):
self.calling_environment.set("a", 6)
self.local.leak("a")
self.local.set("a", 10)
self.assertEqual(self.calling_environment.this_environment["a"], 10)
def test_lexical_environment_lookup(self):
self.lexical_environment.set("a", 15)
self.assertEqual(self.local.lookup("a"), 15)
def test_alter_set(self):
self.local.alter("a")
self.local.set("a", 20)
self.assertEqual(self.local.lookup("a"), 20)
self.assertEqual(self.lexical_environment.this_environment["a"], 20)
def test_default_lookup(self):
self.calling_environment.set("a", 6)
self.lexical_environment.set("a", 12)
self.assertEqual(self.local.lookup("a"), 12)