/*
* Copyright 2012-2017 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.boot.web.servlet;
import java.io.IOException;
import javax.servlet.Filter;
import javax.servlet.FilterChain;
import javax.servlet.FilterConfig;
import javax.servlet.ServletContext;
import javax.servlet.ServletException;
import javax.servlet.ServletRequest;
import javax.servlet.ServletResponse;
import javax.servlet.http.HttpServlet;
import org.junit.Test;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Bean;
import static org.assertj.core.api.Assertions.assertThat;
/**
* Tests for {@link ServletContextInitializerBeans}.
*
* @author Andy Wilkinson
*/
public class ServletContextInitializerBeansTests {
private ConfigurableApplicationContext context;
@Test
public void servletThatImplementsServletContextInitializerIsOnlyRegisteredOnce() {
load(ServletConfiguration.class);
ServletContextInitializerBeans initializerBeans = new ServletContextInitializerBeans(
this.context.getBeanFactory());
assertThat(initializerBeans.size()).isEqualTo(1);
assertThat(initializerBeans.iterator()).hasOnlyElementsOfType(TestServlet.class);
}
@Test
public void filterThatImplementsServletContextInitializerIsOnlyRegisteredOnce() {
load(FilterConfiguration.class);
ServletContextInitializerBeans initializerBeans = new ServletContextInitializerBeans(
this.context.getBeanFactory());
assertThat(initializerBeans.size()).isEqualTo(1);
assertThat(initializerBeans.iterator()).hasOnlyElementsOfType(TestFilter.class);
}
private void load(Class<?> configuration) {
this.context = new AnnotationConfigApplicationContext(configuration);
}
static class ServletConfiguration {
@Bean
public TestServlet testServlet() {
return new TestServlet();
}
}
static class FilterConfiguration {
@Bean
public TestFilter testFilter() {
return new TestFilter();
}
}
static class TestServlet extends HttpServlet implements ServletContextInitializer {
@Override
public void onStartup(ServletContext servletContext) throws ServletException {
}
}
static class TestFilter implements Filter, ServletContextInitializer {
@Override
public void onStartup(ServletContext servletContext) throws ServletException {
}
@Override
public void init(FilterConfig filterConfig) throws ServletException {
}
@Override
public void doFilter(ServletRequest request, ServletResponse response,
FilterChain chain) throws IOException, ServletException {
}
@Override
public void destroy() {
}
}
}