Spring Framework example source code file (OptionsTagTests.java)

This example Spring Framework source code file (OptionsTagTests.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

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The Spring Framework OptionsTagTests.java source code

/*
 * Copyright 2002-2008 the original author or authors.
 *
 * Licensed 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.springframework.web.servlet.tags.form;

import java.beans.PropertyEditor;
import java.io.StringReader;
import java.util.ArrayList;
import java.util.HashMap;
import java.util.List;
import java.util.Map;

import javax.servlet.http.HttpServletRequest;
import javax.servlet.jsp.tagext.Tag;

import org.dom4j.Document;
import org.dom4j.Element;
import org.dom4j.io.SAXReader;

import org.springframework.beans.TestBean;
import org.springframework.mock.web.MockHttpServletRequest;
import org.springframework.mock.web.MockPageContext;
import org.springframework.validation.BeanPropertyBindingResult;
import org.springframework.validation.BindingResult;
import org.springframework.validation.Errors;
import org.springframework.web.servlet.support.BindStatus;
import org.springframework.web.servlet.support.RequestContext;
import org.springframework.web.servlet.tags.RequestContextAwareTag;

/**
 * @author Rob Harrop
 * @author Juergen Hoeller
 */
public class OptionsTagTests extends AbstractHtmlElementTagTests {

	private static final String COMMAND_NAME = "testBean";

	private OptionsTag tag;

	protected void onSetUp() {
		this.tag = new OptionsTag() {
			protected TagWriter createTagWriter() {
				return new TagWriter(getWriter());
			}
		};
		this.tag.setParent(new SelectTag());
		this.tag.setPageContext(getPageContext());
	}

	public void testWithCollection() throws Exception {
		getPageContext().setAttribute(
				SelectTag.LIST_VALUE_PAGE_ATTRIBUTE, new BindStatus(getRequestContext(), "testBean.country", false));

		this.tag.setItems("${countries}");
		this.tag.setItemValue("isoCode");
		this.tag.setItemLabel("name");
		this.tag.setId("myOption");
		this.tag.setCssClass("myClass");
		this.tag.setOnclick("CLICK");
		int result = this.tag.doStartTag();
		assertEquals(Tag.EVAL_PAGE, result);
		String output = getOutput();
		output = "<doc>" + output + "";

		SAXReader reader = new SAXReader();
		Document document = reader.read(new StringReader(output));
		Element rootElement = document.getRootElement();

		List children = rootElement.elements();
		assertEquals("Incorrect number of children", 4, children.size());

		Element element = (Element) rootElement.selectSingleNode("option[@value = 'UK']");
		assertEquals("UK node not selected", "selected", element.attribute("selected").getValue());
		assertEquals("myOption3", element.attribute("id").getValue());
		assertEquals("myClass", element.attribute("class").getValue());
		assertEquals("CLICK", element.attribute("onclick").getValue());
	}

	public void testWithCollectionAndCustomEditor() throws Exception {
		PropertyEditor propertyEditor = new SimpleFloatEditor();

		TestBean target = new TestBean();
		target.setMyFloat(new Float("12.34"));

		BeanPropertyBindingResult errors = new BeanPropertyBindingResult(target, COMMAND_NAME);
		errors.getPropertyAccessor().registerCustomEditor(Float.class, propertyEditor);
		exposeBindingResult(errors);

		getPageContext().setAttribute(
				SelectTag.LIST_VALUE_PAGE_ATTRIBUTE, new BindStatus(getRequestContext(), "testBean.myFloat", false));

		this.tag.setItems("${floats}");
		int result = this.tag.doStartTag();
		assertEquals(Tag.EVAL_PAGE, result);
		String output = getOutput();
		output = "<doc>" + output + "";

		SAXReader reader = new SAXReader();
		Document document = reader.read(new StringReader(output));
		Element rootElement = document.getRootElement();

		List children = rootElement.elements();
		assertEquals("Incorrect number of children", 6, children.size());

		Element element = (Element) rootElement.selectSingleNode("option[text() = '12.34f']");
		assertNotNull("Option node should not be null", element);
		assertEquals("12.34 node not selected", "selected", element.attribute("selected").getValue());
		assertNull("No id rendered", element.attribute("id"));

		element = (Element) rootElement.selectSingleNode("option[text() = '12.35f']");
		assertNotNull("Option node should not be null", element);
		assertNull("12.35 node incorrectly selected", element.attribute("selected"));
		assertNull("No id rendered", element.attribute("id"));
	}

	public void testWithItemsNullReference() throws Exception {
		getPageContext().getRequest().removeAttribute("countries");
		getPageContext().setAttribute(
				SelectTag.LIST_VALUE_PAGE_ATTRIBUTE, new BindStatus(getRequestContext(), "testBean.country", false));

		this.tag.setItems("${countries}");
		this.tag.setItemValue("isoCode");
		this.tag.setItemLabel("name");
		int result = this.tag.doStartTag();
		assertEquals(Tag.EVAL_PAGE, result);
		String output = getOutput();
		output = "<doc>" + output + "";

		SAXReader reader = new SAXReader();
		Document document = reader.read(new StringReader(output));
		Element rootElement = document.getRootElement();

		List children = rootElement.elements();
		assertEquals("Incorrect number of children", 0, children.size());
	}

	public void testWithoutItems() throws Exception {
		getPageContext().setAttribute(
				SelectTag.LIST_VALUE_PAGE_ATTRIBUTE, new BindStatus(getRequestContext(), "testBean.country", false));

		this.tag.setItemValue("isoCode");
		this.tag.setItemLabel("name");
		int result = this.tag.doStartTag();
		assertEquals(Tag.EVAL_PAGE, result);
		String output = getOutput();
		output = "<doc>" + output + "";

		SAXReader reader = new SAXReader();
		Document document = reader.read(new StringReader(output));
		Element rootElement = document.getRootElement();

		List children = rootElement.elements();
		assertEquals("Incorrect number of children", 0, children.size());
	}

	protected void extendRequest(MockHttpServletRequest request) {
		TestBean bean = new TestBean();
		bean.setName("foo");
		bean.setCountry("UK");
		bean.setMyFloat(new Float("12.34"));
		request.setAttribute(COMMAND_NAME, bean);
		request.setAttribute("countries", Country.getCountries());

		List floats = new ArrayList();
		floats.add(new Float("12.30"));
		floats.add(new Float("12.31"));
		floats.add(new Float("12.32"));
		floats.add(new Float("12.33"));
		floats.add(new Float("12.34"));
		floats.add(new Float("12.35"));

		request.setAttribute("floats", floats);
	}

	protected void exposeBindingResult(Errors errors) {
		// wrap errors in a Model
		Map model = new HashMap();
		model.put(BindingResult.MODEL_KEY_PREFIX + COMMAND_NAME, errors);

		// replace the request context with one containing the errors
		MockPageContext pageContext = getPageContext();
		RequestContext context = new RequestContext((HttpServletRequest) pageContext.getRequest(), model);
		pageContext.setAttribute(RequestContextAwareTag.REQUEST_CONTEXT_PAGE_ATTRIBUTE, context);
	}

}