| /* |
| * 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 javax.el.ELContext; |
| import javax.el.ELManager; |
| import javax.el.ELProcessor; |
| import javax.el.ExpressionFactory; |
| import javax.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)); |
| } |
| } |