Quelle TestELEvaluation.java Sprache: JAVA

/*
* 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;

import java.io.File;
import java.util.Date;

import jakarta.el.ELException;
import jakarta.el.ValueExpression;

import org.junit.Assert;
import org.junit.Test;

import org.apache.el.lang.ELSupport;
import org.apache.jasper.el.ELContextImpl;

/**
* Tests the EL engine directly. Similar tests may be found in {@link org.apache.jasper.compiler.TestAttributeParser}
* and {@link TestELInJsp}.
*/
public class TestELEvaluation {

    /**
     * Test use of spaces in ternary expressions. This was primarily an EL parser bug.
     */
    @Test
    public void testBug42565() {
        Assert.assertEquals("false", evaluateExpression("${false?true:false}"));
        Assert.assertEquals("false", evaluateExpression("${false?true: false}"));
        Assert.assertEquals("false", evaluateExpression("${false?true :false}"));
        Assert.assertEquals("false", evaluateExpression("${false?true : false}"));
        Assert.assertEquals("false", evaluateExpression("${false? true:false}"));
        Assert.assertEquals("false", evaluateExpression("${false? true: false}"));
        Assert.assertEquals("false", evaluateExpression("${false? true :false}"));
        Assert.assertEquals("false", evaluateExpression("${false? true : false}"));
        Assert.assertEquals("false", evaluateExpression("${false ?true:false}"));
        Assert.assertEquals("false", evaluateExpression("${false ?true: false}"));
        Assert.assertEquals("false", evaluateExpression("${false ?true :false}"));
        Assert.assertEquals("false", evaluateExpression("${false ?true : false}"));
        Assert.assertEquals("false", evaluateExpression("${false ? true:false}"));
        Assert.assertEquals("false", evaluateExpression("${false ? true: false}"));
        Assert.assertEquals("false", evaluateExpression("${false ? true :false}"));
        Assert.assertEquals("false", evaluateExpression("${false ? true : false}"));
    }

    /**
     * Test use nested ternary expressions. This was primarily an EL parser bug.
     */
    @Test
    public void testBug44994() {
        Assert.assertEquals("none", evaluateExpression("${0 lt 0 ? 1 lt 0 ? 'many': 'one': 'none'}"));
        Assert.assertEquals("one", evaluateExpression("${0 lt 1 ? 1 lt 1 ? 'many': 'one': 'none'}"));
        Assert.assertEquals("many", evaluateExpression("${0 lt 2 ? 1 lt 2 ? 'many': 'one': 'none'}"));
    }

    @Test
    public void testParserBug45511() {
        // Test cases provided by OP
        Assert.assertEquals("true", evaluateExpression("${empty ('')}"));
        Assert.assertEquals("true", evaluateExpression("${empty('')}"));
        Assert.assertEquals("false", evaluateExpression("${(true) and (false)}"));
        Assert.assertEquals("false", evaluateExpression("${(true)and(false)}"));
    }

    @Test
    public void testBug48112() {
        // bug 48112
        Assert.assertEquals("{world}", evaluateExpression("${fn:trim('{world}')}"));
    }

    @Test
    public void testParserLiteralExpression() {
        // Inspired by work on bug 45451, comments from kkolinko on the dev
        // list and looking at the spec to find some edge cases

        // '\' is only an escape character inside a StringLiteral
        Assert.assertEquals("\\\\", evaluateExpression("\\\\"));

        /*
         * LiteralExpressions can only contain ${ or #{ if escaped with \ \ is not an escape character in any other
         * circumstances including \\
         */
        Assert.assertEquals("\\", evaluateExpression("\\"));
        Assert.assertEquals("$", evaluateExpression("$"));
        Assert.assertEquals("#", evaluateExpression("#"));
        Assert.assertEquals("\\$", evaluateExpression("\\$"));
        Assert.assertEquals("\\#", evaluateExpression("\\#"));
        Assert.assertEquals("\\\\$", evaluateExpression("\\\\$"));
        Assert.assertEquals("\\\\#", evaluateExpression("\\\\#"));
        Assert.assertEquals("${", evaluateExpression("\\${"));
        Assert.assertEquals("#{", evaluateExpression("\\#{"));
        Assert.assertEquals("\\${", evaluateExpression("\\\\${"));
        Assert.assertEquals("\\#{", evaluateExpression("\\\\#{"));

        // '\' is only an escape for '${' and '#{'.
        Assert.assertEquals("\\$", evaluateExpression("\\$"));
        Assert.assertEquals("${", evaluateExpression("\\${"));
        Assert.assertEquals("\\$a", evaluateExpression("\\$a"));
        Assert.assertEquals("\\a", evaluateExpression("\\a"));
        Assert.assertEquals("\\\\", evaluateExpression("\\\\"));
    }

    @Test
    public void testParserStringLiteral() {
        // Inspired by work on bug 45451, comments from kkolinko on the dev
        // list and looking at the spec to find some edge cases

        // The only characters that can be escaped inside a String literal
        // are \ " and '. # and $ are not escaped inside a String literal.
        Assert.assertEquals("\\", evaluateExpression("${'\\\\'}"));
        Assert.assertEquals("\\", evaluateExpression("${\"\\\\\"}"));
        Assert.assertEquals("\\\"'$#", evaluateExpression("${'\\\\\\\"\\'$#'}"));
        Assert.assertEquals("\\\"'$#", evaluateExpression("${\"\\\\\\\"\\'$#\"}"));

        // Trying to quote # or $ should throw an error
        Exception e = null;
        try {
            evaluateExpression("${'\\$'}");
        } catch (ELException el) {
            e = el;
        }
        Assert.assertNotNull(e);

        Assert.assertEquals("\\$", evaluateExpression("${'\\\\$'}"));
        Assert.assertEquals("\\\\$", evaluateExpression("${'\\\\\\\\$'}"));

        // Can use ''' inside '"' when quoting with '"' and vice versa without
        // escaping
        Assert.assertEquals("\\\"", evaluateExpression("${'\\\\\"'}"));
        Assert.assertEquals("\"\\", evaluateExpression("${'\"\\\\'}"));
        Assert.assertEquals("\\'", evaluateExpression("${'\\\\\\''}"));
        Assert.assertEquals("'\\", evaluateExpression("${'\\'\\\\'}"));
        Assert.assertEquals("\\'", evaluateExpression("${\"\\\\'\"}"));
        Assert.assertEquals("'\\", evaluateExpression("${\"'\\\\\"}"));
        Assert.assertEquals("\\\"", evaluateExpression("${\"\\\\\\\"\"}"));
        Assert.assertEquals("\"\\", evaluateExpression("${\"\\\"\\\\\"}"));
    }

    @Test
    public void testMultipleEscaping() throws Exception {
        Assert.assertEquals("''", evaluateExpression("${\"\'\'\"}"));
    }

    private void compareBoth(String msg, int expected, Object o1, Object o2) {
        int i1 = ELSupport.compare(null, o1, o2);
        int i2 = ELSupport.compare(null, o2, o1);
        Assert.assertEquals(msg, expected, i1);
        Assert.assertEquals(msg, expected, -i2);
    }

    @Test
    public void testElSupportCompare() {
        compareBoth("Nulls should compare equal", 0, null, null);
        compareBoth("Null should compare equal to \"\"", 0, "", null);
        compareBoth("Null should be less than File()", -1, null, new File(""));
        compareBoth("Null should be less than Date()", -1, null, new Date());
        compareBoth("Date(0) should be less than Date(1)", -1, new Date(0), new Date(1));
        try {
            compareBoth("Should not compare", 0, new Date(), new File(""));
            Assert.fail("Expecting ClassCastException");
        } catch (ClassCastException expected) {
            // Expected
        }
        Assert.assertTrue(null == null);
    }

    /**
     * Test mixing ${...} and #{...} in the same expression.
     */
    @Test
    public void testMixedTypes() {
        // Mixing types should throw an error
        Exception e = null;
        try {
            evaluateExpression("${1+1}#{1+1}");
        } catch (ELException el) {
            e = el;
        }
        Assert.assertNotNull(e);
    }

    @Test
    public void testEscape01() {
        Assert.assertEquals("$${", evaluateExpression("$\\${"));
    }

    @Test
    public void testBug49081a() {
        Assert.assertEquals("$2", evaluateExpression("$${1+1}"));
    }

    @Test
    public void testBug49081b() {
        Assert.assertEquals("#2", evaluateExpression("##{1+1}"));
    }

    @Test
    public void testBug49081c() {
        Assert.assertEquals("#2", evaluateExpression("#${1+1}"));
    }

    @Test
    public void testBug49081d() {
        Assert.assertEquals("$2", evaluateExpression("$#{1+1}"));
    }

    @Test
    public void testBug60431a() {
        Assert.assertEquals("OK", evaluateExpression("${fn:concat('O','K')}"));
    }

    @Test
    public void testBug60431b() {
        Assert.assertEquals("OK", evaluateExpression("${fn:concat(fn:toArray('O','K'))}"));
    }

    @Test
    public void testBug60431c() {
        Assert.assertEquals("", evaluateExpression("${fn:concat()}"));
    }

    @Test
    public void testBug60431d() {
        Assert.assertEquals("OK", evaluateExpression("${fn:concat2('OK')}"));
    }

    @Test
    public void testBug60431e() {
        Assert.assertEquals("RUOK", evaluateExpression("${fn:concat2('RU', fn:toArray('O','K'))}"));
    }

    // ************************************************************************

    private String evaluateExpression(String expression) {
        ExpressionFactoryImpl exprFactory = new ExpressionFactoryImpl();
        ELContextImpl ctx = new ELContextImpl(exprFactory);
        ctx.setFunctionMapper(new TesterFunctions.FMapper());
        ValueExpression ve = exprFactory.createValueExpression(ctx, expression, String.class);
        return (String) ve.getValue(ctx);
    }
}

quality99%

¤ Dauer der Verarbeitung: 0.11 Sekunden (vorverarbeitet) ¤

Wurzel

Suchen

Beweissystem der NASA

Beweissystem Isabelle

NIST Cobol Testsuite

Cephes Mathematical Library

Wiener Entwicklungsmethode

Haftungshinweis

Die Informationen auf dieser Webseite wurden nach bestem Wissen sorgfältig zusammengestellt. Es wird jedoch weder Vollständigkeit, noch Richtigkeit, noch Qualität der bereit gestellten Informationen zugesichert.

Bemerkung:

Die farbliche Syntaxdarstellung ist noch experimentell.