final SymbolTable st = new SymbolTable();
SizzleParser.ReInit(new StringReader(source));
TestTypeCheckingVisitor.typeChecker.visit(SizzleParser.Start(), st);
Assert.assertEquals("my_bool is not an alias for bool", new SizzleName(new SizzleBool()), st.getType("my_bool"));
final ArrayList<SizzleType> members = new ArrayList<SizzleType>(Arrays.asList(new SizzleFloat(), new SizzleFloat()));
Assert.assertEquals("Coordinates is not is not an alias for a tuple of x: float, y: float", new SizzleName(new SizzleTuple(members)),
st.getType("Coordinates"));
Assert.assertEquals("CityMap is not an alias for a mapping from string to tuple of x: float, y: float", new SizzleName(new SizzleMap(
new SizzleString(), new SizzleName(new SizzleTuple(members)))), st.getType("CityMap"));