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/*
* Copyright (C) 2007-2010 Júlio Vilmar Gesser.
* Copyright (C) 2011, 2013-2016 The JavaParser Team.
*
* This file is part of JavaParser.
*
* JavaParser can be used either under the terms of
* a) the GNU Lesser General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
* b) the terms of the Apache License
*
* You should have received a copy of both licenses in LICENCE.LGPL and
* LICENCE.APACHE. Please refer to those files for details.
*
* JavaParser is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Lesser General Public License for more details.
*/
package com.github.javaparser.ast.visitor;
import com.github.javaparser.JavaParser;
import com.github.javaparser.ast.NodeList;
import com.github.javaparser.ast.body.BodyDeclaration;
import com.github.javaparser.ast.body.VariableDeclarator;
import com.github.javaparser.ast.expr.Expression;
import com.github.javaparser.ast.expr.IntegerLiteralExpr;
import com.github.javaparser.ast.expr.StringLiteralExpr;
import org.junit.Test;
import static com.github.javaparser.JavaParser.parseExpression;
import static com.github.javaparser.utils.Utils.EOL;
import static org.junit.Assert.assertEquals;
public class ModifierVisitorTest {
@Test
public void makeSureParentListsCanBeModified() {
NodeList<StringLiteralExpr> list = new NodeList<>();
list.add(new StringLiteralExpr("t"));
list.add(new StringLiteralExpr("a"));
list.add(new StringLiteralExpr("b"));
list.add(new StringLiteralExpr("c"));
list.accept(new ModifierVisitor<Void>() {
@Override
public Visitable visit(final StringLiteralExpr n, final Void arg) {
String v = n.getValue();
list.addFirst(new StringLiteralExpr("extra " + v));
list.remove(new StringLiteralExpr("t"));
if (v.equals("a")) {
return new StringLiteralExpr("x");
}
if (v.equals("b")) {
return null;
}
return n;
}
}, null);
assertEquals("extra c", list.get(0).getValue());
assertEquals("extra b", list.get(1).getValue());
assertEquals("extra a", list.get(2).getValue());
assertEquals("extra t", list.get(3).getValue());
assertEquals("x", list.get(4).getValue());
assertEquals("c", list.get(5).getValue());
assertEquals(6, list.size());
}
@Test
public void binaryExprReturnsLeftExpressionWhenRightSideIsRemoved() {
Expression expression = parseExpression("1+2");
Visitable result = expression.accept(new ModifierVisitor<Void>() {
public Visitable visit(IntegerLiteralExpr integerLiteralExpr, Void arg) {
if (integerLiteralExpr.getValue().equals("1")) {
return null;
}
return integerLiteralExpr;
}
}, null);
assertEquals("2", result.toString());
}
@Test
public void binaryExprReturnsRightExpressionWhenLeftSideIsRemoved() {
final Expression expression = parseExpression("1+2");
final Visitable result = expression.accept(new ModifierVisitor<Void>() {
public Visitable visit(IntegerLiteralExpr integerLiteralExpr, Void arg) {
if (integerLiteralExpr.getValue().equals("2")) {
return null;
}
return integerLiteralExpr;
}
}, null);
assertEquals("1", result.toString());
}
@Test
public void fieldDeclarationCantSurviveWithoutVariables() {
final BodyDeclaration<?> bodyDeclaration = JavaParser.parseBodyDeclaration("int x=1;");
final Visitable result = bodyDeclaration.accept(new ModifierVisitor<Void>() {
public Visitable visit(VariableDeclarator x, Void arg) {
return null;
}
}, null);
assertEquals(null, result);
}
@Test
public void variableDeclarationCantSurviveWithoutVariables() {
final BodyDeclaration<?> bodyDeclaration = JavaParser.parseBodyDeclaration("void x() {int x=1;}");
final Visitable result = bodyDeclaration.accept(new ModifierVisitor<Void>() {
public Visitable visit(VariableDeclarator x, Void arg) {
return null;
}
}, null);
assertEquals("void x() {" + EOL + "}", result.toString());
}
}
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