@Test(expected = java.util.EmptyStackException.class)
public void test() {
Plus p = new Plus();
p.setContext(new Stack<Double>());
p.getContext().push(8.0);
p.eval();
}
@Override
public void visit(Plus plusExp) {
System.out.print("(");
if (plusExp.getLHS() != null) plusExp.getLHS().accept(this);
System.out.print(" + ");
if (plusExp.getRHS() != null) plusExp.getRHS().accept(this);
System.out.print(")");
}
public void testConcatNumberString() {
Plus plus = new Plus(new Number(2), new Text("a"));
plus.type = TextType.instance;
ExpressionVisitor expressionVisitor = new ExpressionVisitor(new SymbolTable());
Expression expression = expressionVisitor.visit(plus);
assertTrue(expression instanceof Text);
Text text = (Text) expression;
assertEquals("2a", text.text);
}
public final void testAdditionBetweenIntegersSimplification() {
Plus plus = new Plus();
plus.left = new Number(2);
plus.left.type = IntegerType.instance;
plus.right = new Number(3);
plus.right.type = IntegerType.instance;
expressionSimplificationTester(plus, Number.class, IntegerType.instance, 5, true);
}
public void testConcatCantOptimize() {
IdExpression id = new IdExpression("a");
id.type = new IdType("A");
Text text = new Text("a");
text.type = TextType.instance;
Plus plus = new Plus(text, id);
plus.type = TextType.instance;
ExpressionVisitor expressionVisitor = new ExpressionVisitor(new SymbolTable());
Expression expression = expressionVisitor.visit(plus);
assertTrue(expression instanceof Concat);
Concat concat = (Concat) expression;
assertEquals(text, concat.left);
assertEquals(id, concat.right);
}
@Override
public Expression visit(Plus plus) {
Plus result = new Plus();
if (plus.getExpr().getClass() == Choice.class) {
String name = "plus" + Integer.toString(count);
count++;
Nonterminal nt = new Nonterminal(name);
Expression exp = plus.getExpr().accept(this);
newRules.put(nt, exp);
result.setExpr(nt);
} else {
Expression exp = plus.getExpr().accept(this);
result.setExpr(exp);
}
return result;
}
public final void testZeroPlusExp() {
Plus p = new Plus();
p.type = IntegerType.instance;
operationWithZero(p, null, true, true);
}
