spring OptionTagEnumTests 源码

spring OptionTagEnumTests 代码

文件路径：/spring-webmvc/src/test/java/org/springframework/web/servlet/tags/form/OptionTagEnumTests.java

/*
 * Copyright 2002-2019 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
 *
 *      https://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 jakarta.servlet.jsp.tagext.BodyTag;
import jakarta.servlet.jsp.tagext.Tag;
import org.junit.jupiter.api.Test;

import org.springframework.beans.testfixture.beans.CustomEnum;
import org.springframework.beans.testfixture.beans.GenericBean;
import org.springframework.web.servlet.support.BindStatus;

import static org.assertj.core.api.Assertions.assertThat;

/**
 * @author Juergen Hoeller
 */
public class OptionTagEnumTests extends AbstractHtmlElementTagTests {

	private OptionTag tag;

	private SelectTag parentTag;

	@Override
	@SuppressWarnings("serial")
	protected void onSetUp() {
		this.tag = new OptionTag() {
			@Override
			protected TagWriter createTagWriter() {
				return new TagWriter(getWriter());
			}
		};
		this.parentTag = new SelectTag() {
			@Override
			public String getName() {
				// Should not be used other than to delegate to
				// RequestDataValueDataProcessor
				return "testName";
			}
		};
		this.tag.setParent(this.parentTag);
		this.tag.setPageContext(getPageContext());
	}

	@Test
	@SuppressWarnings("rawtypes")
	public void withJavaEnum() throws Exception {
		GenericBean testBean = new GenericBean();
		testBean.setCustomEnum(CustomEnum.VALUE_1);
		getPageContext().getRequest().setAttribute("testBean", testBean);
		String selectName = "testBean.customEnum";
		getPageContext().setAttribute(SelectTag.LIST_VALUE_PAGE_ATTRIBUTE,
				new BindStatus(getRequestContext(), selectName, false));

		this.tag.setValue("VALUE_1");

		int result = this.tag.doStartTag();
		assertThat(result).isEqualTo(BodyTag.EVAL_BODY_BUFFERED);
		result = this.tag.doEndTag();
		assertThat(result).isEqualTo(Tag.EVAL_PAGE);

		String output = getWriter().toString();

		assertOptionTagOpened(output);
		assertOptionTagClosed(output);
		assertContainsAttribute(output, "value", "VALUE_1");
		assertContainsAttribute(output, "selected", "selected");
	}

	private void assertOptionTagOpened(String output) {
		assertThat(output.startsWith("<option")).isTrue();
	}

	private void assertOptionTagClosed(String output) {
		assertThat(output.endsWith("</option>")).isTrue();
	}

}

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