def test_assess_list_elem_nested_out_of_bound_should_give_error(self):
with self.assertRaises(CompileError) as context:
generate_commands("""
main () {
list[list[list[int]]] a <- [[[1], [2]]];
a[0][2] <- [1];
}
""")
self.assertTrue(
"List {} has length 2, but has been assessed with out-of-range index 2"
.format(
Expression(Type.list_of(Type.list_of(Type.int())), [[1], [2]],
ident="a[0]")) in str(context.exception))
with self.assertRaises(CompileError) as context:
generate_commands("""
main () {
list[list[list[int]]] a <- [[[1], [2]]];
a[0][1][1] <- 1;
}
""")
self.assertTrue(
"List {} has length 1, but has been assessed with out-of-range index 1"
.format(Expression(Type.list_of(Type.int()), [2],
ident="a[0][1]")) in str(context.exception))
def test_list_elem_expr_out_of_range_should_give_error(self):
with self.assertRaises(CompileError) as context:
generate_commands("""
main () {{
list[int] a <- [1, 2];
int b <- a[2];
}}
""".format(type))
self.assertTrue(
"List {} has length {}, but has been assessed with out-of-range index {}"
.format(Expression(Type.list_of(Type.int()), [1, 2], ident="a"), 2,
2) in str(context.exception))
with self.assertRaises(CompileError) as context:
generate_commands("""
main () {{
list[int] a <- [1, 2];
int b <- a[-1];
}}
""".format(type))
self.assertTrue(
"List {} has length {}, but has been assessed with out-of-range index {}"
.format(Expression(Type.list_of(Type.int()), [1, 2], ident="a"), 2,
-1) in str(context.exception))
def test_eq(self):
vector_elems1 = [
None,
VectorElem("a", Expression(Type.vector(), [1.0, 2.0, 3.0], "a"),
0),
VectorElem("b", Expression(Type.vector(), [1.0, 2.0, 3.0], "b"),
0),
VectorElem("a", Expression(Type.vector(), [2.0, 2.0, 3.0], "a"),
0),
VectorElem("a", Expression(Type.vector(), [1.0, 2.0, 3.0], "a"),
1),
VectorElem("b[1]", Expression(Type.vector(), [1.0, 2.0, 3.0], "a"),
0)
]
vector_elems2 = [
None,
VectorElem("a", Expression(Type.vector(), [1.0, 2.0, 3.0], "a"),
0),
VectorElem("b", Expression(Type.vector(), [1.0, 2.0, 3.0], "b"),
0),
VectorElem("a", Expression(Type.vector(), [2.0, 2.0, 3.0], "a"),
0),
VectorElem("a", Expression(Type.vector(), [1.0, 2.0, 3.0], "a"),
1),
VectorElem("b[1]", Expression(Type.vector(), [1.0, 2.0, 3.0], "a"),
0)
]
for i in range(len(vector_elems1)):
for j in range(len(vector_elems2)):
if i == j:
self.assertEqual(vector_elems1[i], vector_elems2[j])
else:
self.assertNotEqual(vector_elems1[i], vector_elems2[j])
def test_store(self):
st = SymbolTable()
st.store("a", Expression(Type.int(), 1))
self.assertTrue("a" in st)
self.assertEqual(Type.int(), st.get_expression("a").type)
self.assertEqual(1, st.get_expression("a").value)
self.assertRaises(AssertionError, st.store, "a",
Expression(Type.int(), 1))
def test_str(self):
st = SymbolTable()
st.store("a", Expression(Type.int(), 0))
st.store("b", Expression(Type.list_of(Type.boolean()), [True]))
expected = "SymbolTable: {\n" + \
" a -> Expression: { type: int, value: 0, ident: None }\n" + \
" b -> Expression: { type: list[boolean], value: [True], ident: None }\n" + \
"}"
self.assertEqual(expected, str(st))
def test_to_expression_should_return_correct_value(self):
expression = Expression(Type.vector(), [1.0, 2.0, 3.0], "a")
expected = Expression(Type.decimal(), 1.0)
self.assertEqual(expected,
VectorElem("a", expression, 0).to_expression())
expression = Expression(Type.vector(), [1.0, 2.0, 3.0], "b[1]")
expected = Expression(Type.decimal(), 3.0)
self.assertEqual(expected,
VectorElem("b[1]", expression, 2).to_expression())
def test_eq(self):
st1 = SymbolTable()
st2 = SymbolTable()
self.assertTrue(st1 == st2)
st1.store("a", Expression(Type.int(), 0))
self.assertFalse(st1 == st2)
st2.store("a", Expression(Type.int(), 0))
self.assertTrue(st1 == st2)
self.assertNotEqual(SymbolTable(), None)
def visitList(self, ctx: xDroneParser.ListContext) -> Expression:
exprs = [self.visit(expr) for expr in ctx.expr()]
if len(exprs) == 0:
return Expression(Type.empty_list(), [])
if not all(e.type == exprs[0].type for e in exprs):
raise CompileError(
"Elements in list {} should have the same type".format(
[str(e) for e in exprs]))
return Expression(Type.list_of(exprs[0].type),
[e.value for e in exprs])
def test_list_with_inconsistent_type_should_give_error(self):
with self.assertRaises(CompileError) as context:
generate_commands("""
main () {
list[int] a <- [1, 1.0];
}
""")
self.assertTrue(
"Elements in list {} should have the same type".format([
str(Expression(Type.int(), 1, None)),
str(Expression(Type.decimal(), 1.0, None))
]) in str(context.exception))
def visitInsert(self, ctx: xDroneParser.InsertContext) -> None:
list = self.visit(ctx.expr(0))
if not isinstance(list.type, ListType):
raise CompileError(
"Expression {} should have type list, but is {}".format(
list, list.type))
if ctx.AT():
index = self.visit(ctx.expr(1))
value = self.visit(ctx.expr(2))
else:
index = Expression(Type.int(), len(list.value))
value = self.visit(ctx.expr(1))
if index.type != Type.int():
raise CompileError(
"Expression {} should have type int, but is {}".format(
index, index.type))
if index.value > len(list.value) or index.value < 0:
raise CompileError(
"List {} has length {}, but has been inserted at out-of-range index {}"
.format(list, len(list.value), index.value))
if not isinstance(list.type,
EmptyList) and value.type != list.type.elem_type:
raise CompileError(
"List {} has been declared as {}, but inserted with element type {}"
.format(list, list.type, value.type))
self._insert_nested_ident(list.ident, value, index.value)
def test_list_elem_assign_with_wrong_index_should_give_error(self):
types = [
Type.decimal(),
Type.string(),
Type.boolean(),
Type.vector(),
Type.drone(),
Type.list_of(Type.int()),
Type.list_of(Type.decimal()),
Type.list_of(Type.list_of(Type.int()))
]
for type in types:
with self.assertRaises(CompileError) as context:
generate_commands("""
main () {{
{} a;
list[int] b;
b[a] <- 1;
}}
""".format(type))
self.assertTrue(
"Expression {} should have type int, but is {}".format(
Expression(type, type.default_value, ident="a"),
type.type_name) in str(context.exception))
def test_list_insert_with_wrong_type_value_should_give_error(self):
types = [
Type.int(),
Type.decimal(),
Type.string(),
Type.boolean(),
Type.vector(),
Type.drone(),
Type.list_of(Type.int()),
Type.list_of(Type.decimal()),
Type.list_of(Type.list_of(Type.int()))
]
for t1 in types:
for t2 in types:
if t1 == t2:
continue
with self.assertRaises(CompileError) as context:
generate_commands("""
main () {{
{} a;
list[{}] b;
b.insert(a);
}}
""".format(t1, t2))
self.assertTrue(
"List {} has been declared as {}, but inserted with element type {}"
.format(Expression(Type.list_of(t2), [], ident="b"),
Type.list_of(t2), t1) in str(context.exception))
def visitSize(self, ctx: xDroneParser.SizeContext) -> Expression:
expr = self.visit(ctx.expr())
if not isinstance(expr.type, ListType):
raise CompileError(
"Expression {} should have type list, but is {}".format(
expr, expr.type))
return Expression(Type.int(), len(expr.value))
def test_list_should_return_correct_value(self):
actual = SymbolTable()
generate_commands("""
main () {
list[int] a <- [];
list[boolean] b <- [true, false];
}
""",
symbol_table=actual)
expected = SymbolTable()
expected.store("a", Expression(Type.list_of(Type.int()), [],
ident="a"))
expected.store(
"b",
Expression(Type.list_of(Type.boolean()), [True, False], ident="b"))
self.assertEqual(expected, actual)
def visitPlusMinus(self, ctx: xDroneParser.PlusMinusContext) -> Expression:
expr1, expr2 = self.visit(ctx.expr(0)), self.visit(ctx.expr(1))
if self._is_int_or_decimal(expr1.type) and self._is_int_or_decimal(
expr2.type):
result_type, func = self._get_int_decimal_result_type(
expr1.type, expr2.type)
if ctx.PLUS():
result_value = func(expr1.value + expr2.value)
else: # MINUS
result_value = func(expr1.value - expr2.value)
elif expr1.type == Type.vector() and expr2.type == Type.vector():
result_type = Type.vector()
if ctx.PLUS():
result_value = [
e1 + e2 for e1, e2 in zip(expr1.value, expr2.value)
]
else: # MINUS
result_value = [
e1 - e2 for e1, e2 in zip(expr1.value, expr2.value)
]
else:
raise CompileError(
"Expression {} and {} have wrong types to perform addition or subtraction"
.format(expr1, expr2))
return Expression(result_type, result_value)
def visitMultiDivide(self,
ctx: xDroneParser.MultiDivideContext) -> Expression:
expr1, expr2 = self.visit(ctx.expr(0)), self.visit(ctx.expr(1))
if self._is_int_or_decimal(expr1.type) and self._is_int_or_decimal(
expr2.type):
result_type, func = self._get_int_decimal_result_type(
expr1.type, expr2.type)
if ctx.MULTI():
result_value = func(expr1.value * expr2.value)
else: # DIV
if expr2.value == 0:
raise CompileError("Division by zero")
result_value = func(expr1.value / expr2.value)
elif self._is_int_or_decimal(
expr1.type) and expr2.type == Type.vector():
result_type = Type.vector()
if ctx.MULTI():
result_value = [expr1.value * e for e in expr2.value]
else: # DIV
raise CompileError(
"Expression {} and {} have wrong types to perform multiplication or division"
.format(expr1, expr2))
elif expr1.type == Type.vector() and self._is_int_or_decimal(
expr2.type):
result_type = Type.vector()
if ctx.MULTI():
result_value = [e * expr2.value for e in expr1.value]
else: # DIV
result_value = [e / expr2.value for e in expr1.value]
else:
raise CompileError(
"Expression {} and {} have wrong types to perform multiplication or division"
.format(expr1, expr2))
return Expression(result_type, result_value)
def visitNot(self, ctx: xDroneParser.NotContext) -> Expression:
expr = self.visit(ctx.expr())
if expr.type != Type.boolean():
raise CompileError(
"Expression {} should have type boolean, but is {}".format(
expr, expr.type))
return Expression(Type.boolean(), not expr.value)
def test_get_expression(self):
st = SymbolTable()
self.assertRaises(AssertionError, st.get_expression, "a")
st.store("a", Expression(Type.list_of(Type.int()), [1]))
self.assertEqual([1], st.get_expression("a").value)
self.assertEqual(1, st.get_expression("a").value[0])
self.assertEqual(Type.list_of(Type.int()), st.get_expression("a").type)
def visitDeclare(self, ctx: xDroneParser.DeclareContext) -> None:
type, identifier = self.visit(ctx.type_()), self.visit(ctx.ident())
ident = identifier.ident
if ident in self._get_latest_symbol_table() or ident in self.drones:
raise CompileError("Identifier {} already declared".format(ident))
self._get_latest_symbol_table().store(
ident, Expression(type, type.default_value, ident=ident))
def test_assign_list_elem_with_different_type_should_give_error(self):
types = [
Type.int(),
Type.decimal(),
Type.string(),
Type.boolean(),
Type.vector(),
Type.drone(),
Type.list_of(Type.int()),
Type.list_of(Type.list_of(Type.int()))
]
for t1 in types:
for t2 in types:
if t1 == t2:
continue
with self.assertRaises(CompileError) as context:
generate_commands("""
main () {{
{} a;
{} b;
list[{}] c <- [a];
c[0] <- b;
}}
""".format(t1, t2, t1))
self.assertTrue(
"Assigned value {} should have type {}, but is {}".format(
Expression(t2, t2.default_value, ident="b"),
t1.type_name, t2.type_name) in str(context.exception))
def test_update(self):
st = SymbolTable()
self.assertRaises(AssertionError, st.update, "a", 1)
st.store("a", Expression(Type.int(), 1))
st.update("a", 2)
self.assertEqual(Type.int(), st.get_expression("a").type)
self.assertEqual(2, st.get_expression("a").value)
def test_list_elem_expr_should_return_correct_value(self):
actual = SymbolTable()
generate_commands("""
main () {
list[int] a <- [1, 2, 3];
int b <- a[0];
int c <- a[1];
int d <- a[2];
}
""",
symbol_table=actual)
expected = SymbolTable()
expected.store(
"a", Expression(Type.list_of(Type.int()), [1, 2, 3], ident="a"))
expected.store("b", Expression(Type.int(), 1, ident="b"))
expected.store("c", Expression(Type.int(), 2, ident="c"))
expected.store("d", Expression(Type.int(), 3, ident="d"))
self.assertEqual(expected, actual)
def test_vector_elem_expr_should_return_correct_value(self):
actual = SymbolTable()
generate_commands("""
main () {
vector a <- (1, -2, -3.0);
decimal b <- a.x;
decimal c <- a.y;
decimal d <- a.z;
}
""",
symbol_table=actual)
expected = SymbolTable()
expected.store("a",
Expression(Type.vector(), [1.0, -2.0, -3.0], ident="a"))
expected.store("b", Expression(Type.decimal(), 1.0, ident="b"))
expected.store("c", Expression(Type.decimal(), -2.0, ident="c"))
expected.store("d", Expression(Type.decimal(), -3.0, ident="d"))
self.assertEqual(expected, actual)
def test_for_should_keep_updates_but_discard_new_variables(self):
actual = SymbolTable()
actual_commands = generate_commands("""
main () {
int a <- 0;
int i <- 1;
for i from 1 to 5 {
int b <- 1;
a <- a + 1;
}
}
""", symbol_table=actual)
expected = SymbolTable()
expected.store("a", Expression(Type.int(), 5, ident="a"))
expected.store("i", Expression(Type.int(), 5, ident="i"))
self.assertEqual(expected, actual)
expected_commands = []
self.assertEqual(expected_commands, actual_commands)
def test_declare_and_assign_vector_should_change_symbol_table(self):
actual = SymbolTable()
generate_commands("""
main () { vector a <- (1.0, 2.0, -3.0); }
""",
symbol_table=actual)
expected = SymbolTable()
expected.store("a", Expression(Type.vector(), [1, 2, -3], ident="a"))
self.assertEqual(expected, actual)
def test_declare_and_assign_boolean_should_change_symbol_table(self):
actual = SymbolTable()
generate_commands("""
main () { boolean a <- true; }
""",
symbol_table=actual)
expected = SymbolTable()
expected.store("a", Expression(Type.boolean(), True, ident="a"))
self.assertEqual(expected, actual)
def test_declare_and_assign_string_should_change_symbol_table(self):
actual = SymbolTable()
generate_commands("""
main () { string a <- "\0a"; }
""",
symbol_table=actual)
expected = SymbolTable()
expected.store("a", Expression(Type.string(), "\0a", ident="a"))
self.assertEqual(expected, actual)
def test_declare_and_assign_decimal_should_change_symbol_table(self):
actual = SymbolTable()
generate_commands("""
main () { decimal a <- 1.0; }
""",
symbol_table=actual)
expected = SymbolTable()
expected.store("a", Expression(Type.decimal(), 1.0, ident="a"))
self.assertEqual(expected, actual)
def test_declare_drone_should_change_symbol_table(self):
actual = SymbolTable()
generate_commands("""
main () { drone a; }
""",
symbol_table=actual)
expected = SymbolTable()
expected.store("a", Expression(Type.drone(), NullDrone(), ident="a"))
self.assertEqual(expected, actual)
def test_str(self):
self.assertEqual(
"ListElem: { ident: a, " +
"container: Expression: { type: vector, value: [1.0, 2.0, 3.0], ident: a }, "
+
"index: 0, expression: Expression: { type: decimal, value: 1.0, ident: None } }",
str(
VectorElem("a", Expression(Type.vector(), [1.0, 2.0, 3.0],
"a"), 0)))
