Quelle TestValueExpressionImpl.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.util.ArrayList;
import java.util.Collections;
import java.util.HashMap;
import java.util.List;
import java.util.Map;
import java.util.Optional;

import jakarta.el.ELContext;
import jakarta.el.ExpressionFactory;
import jakarta.el.ValueExpression;
import jakarta.el.ValueReference;

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

import org.apache.jasper.el.ELContextImpl;

public class TestValueExpressionImpl {

    @Test
    public void testGetValueReference() {
        ExpressionFactory factory = ExpressionFactory.newInstance();
        ELContext context = new ELContextImpl(factory);

        TesterBeanB beanB = new TesterBeanB();
        beanB.setName("Tomcat");
        ValueExpression var = factory.createValueExpression(beanB, TesterBeanB.class);
        context.getVariableMapper().setVariable("beanB", var);

        ValueExpression ve = factory.createValueExpression(context, "${beanB.name}", String.class);

        // First check the basics work
        String result = (String) ve.getValue(context);
        Assert.assertEquals("Tomcat", result);

        // Now check the value reference
        ValueReference vr = ve.getValueReference(context);
        Assert.assertNotNull(vr);

        Assert.assertEquals(beanB, vr.getBase());
        Assert.assertEquals("name", vr.getProperty());
    }

    @Test
    public void testGetValueReferenceVariable() {
        ExpressionFactory factory = ExpressionFactory.newInstance();
        ELContext context = new ELContextImpl(factory);

        TesterBeanB beanB = new TesterBeanB();
        beanB.setName("Tomcat");
        ValueExpression var = factory.createValueExpression(beanB, TesterBeanB.class);
        context.getVariableMapper().setVariable("beanB", var);

        ValueExpression var2 = factory.createValueExpression(context, "${beanB.name}", String.class);

        context.getVariableMapper().setVariable("foo", var2);

        ValueExpression ve = factory.createValueExpression(context, "${foo}", ValueExpression.class);

        // Now check the value reference
        ValueReference vr = ve.getValueReference(context);
        Assert.assertNotNull(vr);

        Assert.assertEquals(beanB, vr.getBase());
        Assert.assertEquals("name", vr.getProperty());
    }

    @Test
    public void testBug49345() {
        ExpressionFactory factory = ExpressionFactory.newInstance();
        ELContext context = new ELContextImpl(factory);

        TesterBeanA beanA = new TesterBeanA();
        TesterBeanB beanB = new TesterBeanB();
        beanB.setName("Tomcat");
        beanA.setBean(beanB);

        ValueExpression var = factory.createValueExpression(beanA, TesterBeanA.class);
        context.getVariableMapper().setVariable("beanA", var);

        ValueExpression ve = factory.createValueExpression(context, "${beanA.bean.name}", String.class);

        // First check the basics work
        String result = (String) ve.getValue(context);
        Assert.assertEquals("Tomcat", result);

        // Now check the value reference
        ValueReference vr = ve.getValueReference(context);
        Assert.assertNotNull(vr);

        Assert.assertEquals(beanB, vr.getBase());
        Assert.assertEquals("name", vr.getProperty());
    }

    @Test
    public void testBug50105() {
        ExpressionFactory factory = ExpressionFactory.newInstance();
        ELContext context = new ELContextImpl(factory);

        TesterEnum testEnum = TesterEnum.APPLE;

        ValueExpression var = factory.createValueExpression(testEnum, TesterEnum.class);
        context.getVariableMapper().setVariable("testEnum", var);

        // When coercing an Enum to a String, name() should always be used.
        ValueExpression ve1 = factory.createValueExpression(context, "${testEnum}", String.class);
        String result1 = (String) ve1.getValue(context);
        Assert.assertEquals("APPLE", result1);

        ValueExpression ve2 = factory.createValueExpression(context, "foo${testEnum}bar", String.class);
        String result2 = (String) ve2.getValue(context);
        Assert.assertEquals("fooAPPLEbar", result2);
    }

    @Test
    public void testBug51177ObjectMap() {
        ExpressionFactory factory = ExpressionFactory.newInstance();
        ELContext context = new ELContextImpl(factory);

        Object o1 = "String value";
        Object o2 = Integer.valueOf(32);

        Map<Object, Object> map = new HashMap<>();
        map.put("key1", o1);
        map.put("key2", o2);

        ValueExpression var = factory.createValueExpression(map, Map.class);
        context.getVariableMapper().setVariable("map", var);

        ValueExpression ve1 = factory.createValueExpression(context, "${map.key1}", Object.class);
        ve1.setValue(context, o2);
        Assert.assertEquals(o2, ve1.getValue(context));

        ValueExpression ve2 = factory.createValueExpression(context, "${map.key2}", Object.class);
        ve2.setValue(context, o1);
        Assert.assertEquals(o1, ve2.getValue(context));
    }

    @Test
    public void testBug51177ObjectList() {
        ExpressionFactory factory = ExpressionFactory.newInstance();
        ELContext context = new ELContextImpl(factory);

        Object o1 = "String value";
        Object o2 = Integer.valueOf(32);

        List<Object> list = new ArrayList<>();
        list.add(0, o1);
        list.add(1, o2);

        ValueExpression var = factory.createValueExpression(list, List.class);
        context.getVariableMapper().setVariable("list", var);

        ValueExpression ve1 = factory.createValueExpression(context, "${list[0]}", Object.class);
        ve1.setValue(context, o2);
        Assert.assertEquals(o2, ve1.getValue(context));

        ValueExpression ve2 = factory.createValueExpression(context, "${list[1]}", Object.class);
        ve2.setValue(context, o1);
        Assert.assertEquals(o1, ve2.getValue(context));
    }

    /*
     * Test returning an empty list as a bean property.
     */
    @Test
    public void testBug51544Bean() throws Exception {
        ExpressionFactory factory = ExpressionFactory.newInstance();
        ELContext context = new ELContextImpl(factory);

        TesterBeanA beanA = new TesterBeanA();
        beanA.setValList(Collections.emptyList());

        ValueExpression var = factory.createValueExpression(beanA, TesterBeanA.class);
        context.getVariableMapper().setVariable("beanA", var);

        ValueExpression ve = factory.createValueExpression(context, "${beanA.valList.size()}", Integer.class);

        Integer result = (Integer) ve.getValue(context);
        Assert.assertEquals(Integer.valueOf(0), result);
    }

    /*
     * Test using list directly as variable.
     */
    @Test
    public void testBug51544Direct() throws Exception {
        ExpressionFactory factory = ExpressionFactory.newInstance();
        ELContext context = new ELContextImpl(factory);

        List<?> list = Collections.emptyList();

        ValueExpression var = factory.createValueExpression(list, List.class);
        context.getVariableMapper().setVariable("list", var);

        ValueExpression ve = factory.createValueExpression(context, "${list.size()}", Integer.class);

        Integer result = (Integer) ve.getValue(context);
        Assert.assertEquals(Integer.valueOf(0), result);
    }

    @Test
    public void testBug56522SetNullValue() {
        ExpressionFactory factory = ExpressionFactory.newInstance();
        ELContext context = new ELContextImpl(factory);

        TesterBeanB beanB = new TesterBeanB();
        beanB.setName("Tomcat");
        ValueExpression var = factory.createValueExpression(beanB, TesterBeanB.class);
        context.getVariableMapper().setVariable("beanB", var);

        ValueExpression ve = factory.createValueExpression(context, "${beanB.name}", String.class);

        // First check the basics work
        String result = (String) ve.getValue(context);
        Assert.assertEquals("Tomcat", result);

        // Now set the value to null
        ve.setValue(context, null);

        Assert.assertEquals("", beanB.getName());
    }

    @Test
    public void testOptional01() {
        ExpressionFactory factory = ExpressionFactory.newInstance();
        ELContext context = new ELContextImpl(factory);

        final String data = "some data";

        TesterBeanJ beanJ = new TesterBeanJ();
        TesterBeanJ beanJ2 = new TesterBeanJ();
        beanJ2.setData(data);
        beanJ.setBean(beanJ2);

        ValueExpression var = factory.createValueExpression(beanJ, TesterBeanJ.class);
        context.getVariableMapper().setVariable("beanJ", var);

        ValueExpression ve = factory.createValueExpression(context, "${beanJ.optionalBean.map(b -> b.data)}",
                Optional.class);

        @SuppressWarnings("unchecked")
        Optional<String> result = (Optional<String>) ve.getValue(context);
        Assert.assertEquals(data, result.get());
    }

    @Test
    public void testOptional02() {
        ExpressionFactory factory = ExpressionFactory.newInstance();
        ELContext context = new ELContextImpl(factory);

        TesterBeanJ beanJ = new TesterBeanJ();

        ValueExpression var = factory.createValueExpression(beanJ, TesterBeanJ.class);
        context.getVariableMapper().setVariable("beanJ", var);

        ValueExpression ve = factory.createValueExpression(context, "${beanJ.optionalBean.map(b -> b.data)}",
                Optional.class);

        @SuppressWarnings("unchecked")
        Optional<String> result = (Optional<String>) ve.getValue(context);
        Assert.assertTrue(result.isEmpty());
    }

    @Test
    public void testOptional03() {
        ExpressionFactory factory = ExpressionFactory.newInstance();
        ELContext context = new ELContextImpl(factory);

        final String data = "some data";

        TesterBeanJ beanJ = new TesterBeanJ();
        TesterBeanJ beanJ2 = new TesterBeanJ();
        beanJ2.setData(data);
        beanJ.setBean(beanJ2);

        ValueExpression var = factory.createValueExpression(beanJ, TesterBeanJ.class);
        context.getVariableMapper().setVariable("beanJ", var);

        ValueExpression ve = factory.createValueExpression(context, "${beanJ.optionalBean.get().data}", String.class);

        String result = (String) ve.getValue(context);
        Assert.assertEquals(data, result);
    }

    @Test
    public void testOptional04() {
        ExpressionFactory factory = ExpressionFactory.newInstance();
        ELContext context = new ELContextImpl(factory);

        TesterBeanJ beanJ = new TesterBeanJ();

        ValueExpression var = factory.createValueExpression(beanJ, TesterBeanJ.class);
        context.getVariableMapper().setVariable("beanJ", var);

        ValueExpression ve = factory.createValueExpression(context,
                "${beanJ.optionalBean.map(b -> b.data).orElse(null)}", String.class);

        String result = (String) ve.getValue(context);
        // Result is null but is coerced to String which makes it ""
        Assert.assertNotNull(result);
        Assert.assertTrue(result.isEmpty());
    }
}

quality98%

¤ Dauer der Verarbeitung: 0.15 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.