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);
}
