/*
* Licensed to the Apache Software Foundation (ASF) under one or more
* contributor license agreements. See the NOTICE file distributed with
* this work for additional information regarding copyright ownership.
* The ASF licenses this file to You under the Apache License, Version 2.0
* (the "License"); you may not use this file except in compliance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS,
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
package org.apache.el.parser;
import jakarta.el.ELContext;
import jakarta.el.ELManager;
import jakarta.el.ELProcessor;
import jakarta.el.ExpressionFactory;
import jakarta.el.ValueExpression;
import org.junit.Assert;
import org.junit.Test;
public class TestAstConcatenation {
/**
* Test string concatenation.
*/
@Test
public void testConcatenation01() {
ELProcessor processor = new ELProcessor();
Object result = processor.getValue("'a' += 'b'", String.class);
Assert.assertEquals("ab", result);
}
/**
* Test coercion to string then concatenation.
*/
@Test
public void testConcatenation02() {
ELProcessor processor = new ELProcessor();
Object result = processor.getValue("1 += 2", String.class);
Assert.assertEquals("12", result);
}
/**
* Test string concatenation with whitespace.
*/
@Test
public void testConcatenation03() {
ELProcessor processor = new ELProcessor();
Object result = processor.getValue("' a' += ' b '", String.class);
Assert.assertEquals(" a b ", result);
}
/**
* Test string concatenation with mixed types.
*/
@Test
public void testConcatenation04() {
ELProcessor processor = new ELProcessor();
Object result = processor.getValue("'a' += 3", String.class);
Assert.assertEquals("a3", result);
}
/**
* Test operator precedence (+ before +=).
*/
@Test
public void testPrecedence01() {
ELProcessor processor = new ELProcessor();
Object result = processor.getValue("1 + 2 += 3", String.class);
Assert.assertEquals("33", result);
}
/**
* Test operator precedence (+ before +=).
*/
@Test
public void testPrecedence02() {
ELProcessor processor = new ELProcessor();
Object result = processor.getValue("1 += 2 + 3", String.class);
Assert.assertEquals("15", result);
}
/**
* Test operator precedence (+= before >).
*/
@Test
public void testPrecedence03() {
ELProcessor processor = new ELProcessor();
Object result = processor.getValue("10 > 2 += 3", String.class);
Assert.assertEquals("false", result);
}
/**
* Test operator precedence (+= before >).
*/
@Test
public void testPrecedence04() {
ELProcessor processor = new ELProcessor();
Object result = processor.getValue("1 += 2 > 3", String.class);
Assert.assertEquals("true", result);
}
@Test
public void testGetType() {
ELProcessor processor = new ELProcessor();
ELContext context = processor.getELManager().getELContext();
ExpressionFactory factory = ELManager.getExpressionFactory();
ValueExpression ve = factory.createValueExpression(
context, "${'a' += 3}", String.class);
Assert.assertEquals(String.class, ve.getType(context));
Assert.assertEquals("a3", ve.getValue(context));
}
}