265 lines
10 KiB
Java
265 lines
10 KiB
Java
/*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed with
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* this work for additional information regarding copyright ownership.
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* The ASF licenses this file to You under the Apache License, Version 2.0
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* (the "License"); you may not use this file except in compliance with
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* the License. You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package org.apache.el;
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import java.io.File;
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import java.util.Date;
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import javax.el.ELException;
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import javax.el.ValueExpression;
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import org.junit.Assert;
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import org.junit.Test;
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import org.apache.el.lang.ELSupport;
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import org.apache.jasper.el.ELContextImpl;
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/**
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* Tests the EL engine directly. Similar tests may be found in
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* {@link org.apache.jasper.compiler.TestAttributeParser} and
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* {@link TestELInJsp}.
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*/
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public class TestELEvaluation {
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/**
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* Test use of spaces in ternary expressions. This was primarily an EL
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* parser bug.
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*/
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@Test
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public void testBug42565() {
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Assert.assertEquals("false", evaluateExpression("${false?true:false}"));
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Assert.assertEquals("false", evaluateExpression("${false?true: false}"));
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Assert.assertEquals("false", evaluateExpression("${false?true :false}"));
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Assert.assertEquals("false", evaluateExpression("${false?true : false}"));
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Assert.assertEquals("false", evaluateExpression("${false? true:false}"));
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Assert.assertEquals("false", evaluateExpression("${false? true: false}"));
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Assert.assertEquals("false", evaluateExpression("${false? true :false}"));
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Assert.assertEquals("false", evaluateExpression("${false? true : false}"));
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Assert.assertEquals("false", evaluateExpression("${false ?true:false}"));
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Assert.assertEquals("false", evaluateExpression("${false ?true: false}"));
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Assert.assertEquals("false", evaluateExpression("${false ?true :false}"));
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Assert.assertEquals("false", evaluateExpression("${false ?true : false}"));
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Assert.assertEquals("false", evaluateExpression("${false ? true:false}"));
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Assert.assertEquals("false", evaluateExpression("${false ? true: false}"));
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Assert.assertEquals("false", evaluateExpression("${false ? true :false}"));
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Assert.assertEquals("false", evaluateExpression("${false ? true : false}"));
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}
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/**
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* Test use nested ternary expressions. This was primarily an EL parser bug.
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*/
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@Test
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public void testBug44994() {
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Assert.assertEquals("none", evaluateExpression(
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"${0 lt 0 ? 1 lt 0 ? 'many': 'one': 'none'}"));
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Assert.assertEquals("one", evaluateExpression(
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"${0 lt 1 ? 1 lt 1 ? 'many': 'one': 'none'}"));
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Assert.assertEquals("many", evaluateExpression(
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"${0 lt 2 ? 1 lt 2 ? 'many': 'one': 'none'}"));
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}
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@Test
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public void testParserBug45511() {
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// Test cases provided by OP
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Assert.assertEquals("true", evaluateExpression("${empty ('')}"));
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Assert.assertEquals("true", evaluateExpression("${empty('')}"));
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Assert.assertEquals("false", evaluateExpression("${(true) and (false)}"));
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Assert.assertEquals("false", evaluateExpression("${(true)and(false)}"));
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}
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@Test
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public void testBug48112() {
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// bug 48112
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Assert.assertEquals("{world}", evaluateExpression("${fn:trim('{world}')}"));
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}
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@Test
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public void testParserLiteralExpression() {
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// Inspired by work on bug 45451, comments from kkolinko on the dev
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// list and looking at the spec to find some edge cases
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// '\' is only an escape character inside a StringLiteral
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Assert.assertEquals("\\\\", evaluateExpression("\\\\"));
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/*
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* LiteralExpressions can only contain ${ or #{ if escaped with \
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* \ is not an escape character in any other circumstances including \\
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*/
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Assert.assertEquals("\\", evaluateExpression("\\"));
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Assert.assertEquals("$", evaluateExpression("$"));
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Assert.assertEquals("#", evaluateExpression("#"));
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Assert.assertEquals("\\$", evaluateExpression("\\$"));
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Assert.assertEquals("\\#", evaluateExpression("\\#"));
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Assert.assertEquals("\\\\$", evaluateExpression("\\\\$"));
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Assert.assertEquals("\\\\#", evaluateExpression("\\\\#"));
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Assert.assertEquals("${", evaluateExpression("\\${"));
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Assert.assertEquals("#{", evaluateExpression("\\#{"));
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Assert.assertEquals("\\${", evaluateExpression("\\\\${"));
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Assert.assertEquals("\\#{", evaluateExpression("\\\\#{"));
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// '\' is only an escape for '${' and '#{'.
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Assert.assertEquals("\\$", evaluateExpression("\\$"));
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Assert.assertEquals("${", evaluateExpression("\\${"));
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Assert.assertEquals("\\$a", evaluateExpression("\\$a"));
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Assert.assertEquals("\\a", evaluateExpression("\\a"));
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Assert.assertEquals("\\\\", evaluateExpression("\\\\"));
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}
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@Test
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public void testParserStringLiteral() {
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// Inspired by work on bug 45451, comments from kkolinko on the dev
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// list and looking at the spec to find some edge cases
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// The only characters that can be escaped inside a String literal
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// are \ " and '. # and $ are not escaped inside a String literal.
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Assert.assertEquals("\\", evaluateExpression("${'\\\\'}"));
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Assert.assertEquals("\\", evaluateExpression("${\"\\\\\"}"));
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Assert.assertEquals("\\\"'$#", evaluateExpression("${'\\\\\\\"\\'$#'}"));
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Assert.assertEquals("\\\"'$#", evaluateExpression("${\"\\\\\\\"\\'$#\"}"));
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// Trying to quote # or $ should throw an error
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Exception e = null;
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try {
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evaluateExpression("${'\\$'}");
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} catch (ELException el) {
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e = el;
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}
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Assert.assertNotNull(e);
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Assert.assertEquals("\\$", evaluateExpression("${'\\\\$'}"));
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Assert.assertEquals("\\\\$", evaluateExpression("${'\\\\\\\\$'}"));
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// Can use ''' inside '"' when quoting with '"' and vice versa without
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// escaping
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Assert.assertEquals("\\\"", evaluateExpression("${'\\\\\"'}"));
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Assert.assertEquals("\"\\", evaluateExpression("${'\"\\\\'}"));
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Assert.assertEquals("\\'", evaluateExpression("${'\\\\\\''}"));
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Assert.assertEquals("'\\", evaluateExpression("${'\\'\\\\'}"));
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Assert.assertEquals("\\'", evaluateExpression("${\"\\\\'\"}"));
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Assert.assertEquals("'\\", evaluateExpression("${\"'\\\\\"}"));
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Assert.assertEquals("\\\"", evaluateExpression("${\"\\\\\\\"\"}"));
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Assert.assertEquals("\"\\", evaluateExpression("${\"\\\"\\\\\"}"));
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}
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@Test
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public void testMultipleEscaping() throws Exception {
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Assert.assertEquals("''", evaluateExpression("${\"\'\'\"}"));
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}
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private void compareBoth(String msg, int expected, Object o1, Object o2){
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int i1 = ELSupport.compare(null, o1, o2);
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int i2 = ELSupport.compare(null, o2, o1);
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Assert.assertEquals(msg,expected, i1);
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Assert.assertEquals(msg,expected, -i2);
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}
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@Test
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public void testElSupportCompare(){
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compareBoth("Nulls should compare equal", 0, null, null);
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compareBoth("Null should compare equal to \"\"", 0, "", null);
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compareBoth("Null should be less than File()",-1, null, new File(""));
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compareBoth("Null should be less than Date()",-1, null, new Date());
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compareBoth("Date(0) should be less than Date(1)",-1, new Date(0), new Date(1));
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try {
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compareBoth("Should not compare",0, new Date(), new File(""));
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Assert.fail("Expecting ClassCastException");
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} catch (ClassCastException expected) {
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// Expected
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}
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Assert.assertTrue(null == null);
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}
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/**
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* Test mixing ${...} and #{...} in the same expression.
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*/
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@Test
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public void testMixedTypes() {
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// Mixing types should throw an error
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Exception e = null;
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try {
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evaluateExpression("${1+1}#{1+1}");
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} catch (ELException el) {
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e = el;
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}
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Assert.assertNotNull(e);
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}
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@Test
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public void testEscape01() {
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Assert.assertEquals("$${", evaluateExpression("$\\${"));
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}
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@Test
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public void testBug49081a() {
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Assert.assertEquals("$2", evaluateExpression("$${1+1}"));
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}
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@Test
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public void testBug49081b() {
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Assert.assertEquals("#2", evaluateExpression("##{1+1}"));
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}
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@Test
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public void testBug49081c() {
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Assert.assertEquals("#2", evaluateExpression("#${1+1}"));
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}
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@Test
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public void testBug49081d() {
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Assert.assertEquals("$2", evaluateExpression("$#{1+1}"));
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}
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@Test
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public void testBug60431a() {
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Assert.assertEquals("OK", evaluateExpression("${fn:concat('O','K')}"));
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}
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@Test
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public void testBug60431b() {
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Assert.assertEquals("OK", evaluateExpression("${fn:concat(fn:toArray('O','K'))}"));
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}
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@Test
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public void testBug60431c() {
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Assert.assertEquals("", evaluateExpression("${fn:concat()}"));
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}
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@Test
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public void testBug60431d() {
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Assert.assertEquals("OK", evaluateExpression("${fn:concat2('OK')}"));
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}
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@Test
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public void testBug60431e() {
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Assert.assertEquals("RUOK", evaluateExpression("${fn:concat2('RU', fn:toArray('O','K'))}"));
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}
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// ************************************************************************
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private String evaluateExpression(String expression) {
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ExpressionFactoryImpl exprFactory = new ExpressionFactoryImpl();
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ELContextImpl ctx = new ELContextImpl(exprFactory);
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ctx.setFunctionMapper(new TesterFunctions.FMapper());
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ValueExpression ve = exprFactory.createValueExpression(ctx, expression,
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String.class);
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return (String) ve.getValue(ctx);
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}
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}
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