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ServletContextInitializerBeansTests.java
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ServletContextInitializerBeansTests.java
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/*
* Copyright 2012-2021 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.boot.web.servlet;
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 javax.servlet.http.HttpSessionIdListener;
import org.junit.jupiter.api.Test;
import org.springframework.context.ConfigurableApplicationContext;
import org.springframework.context.annotation.AnnotationConfigApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import static org.assertj.core.api.Assertions.assertThat;
/**
* Tests for {@link ServletContextInitializerBeans}.
*
* @author Andy Wilkinson
*/
class ServletContextInitializerBeansTests {
private ConfigurableApplicationContext context;
@Test
void servletThatImplementsServletContextInitializerIsOnlyRegisteredOnce() {
load(ServletConfiguration.class);
ServletContextInitializerBeans initializerBeans = new ServletContextInitializerBeans(
this.context.getBeanFactory());
assertThat(initializerBeans.size()).isEqualTo(1);
assertThat(initializerBeans.iterator()).toIterable().hasOnlyElementsOfType(TestServlet.class);
}
@Test
void filterThatImplementsServletContextInitializerIsOnlyRegisteredOnce() {
load(FilterConfiguration.class);
ServletContextInitializerBeans initializerBeans = new ServletContextInitializerBeans(
this.context.getBeanFactory());
assertThat(initializerBeans.size()).isEqualTo(1);
assertThat(initializerBeans.iterator()).toIterable().hasOnlyElementsOfType(TestFilter.class);
}
@Test
void looksForInitializerBeansOfSpecifiedType() {
load(TestConfiguration.class);
ServletContextInitializerBeans initializerBeans = new ServletContextInitializerBeans(
this.context.getBeanFactory(), TestServletContextInitializer.class);
assertThat(initializerBeans.size()).isEqualTo(1);
assertThat(initializerBeans.iterator()).toIterable().hasOnlyElementsOfType(TestServletContextInitializer.class);
}
@Test
void whenAnHttpSessionIdListenerBeanIsDefinedThenARegistrationBeanIsCreatedForIt() {
load(HttpSessionIdListenerConfiguration.class);
ServletContextInitializerBeans initializerBeans = new ServletContextInitializerBeans(
this.context.getBeanFactory());
assertThat(initializerBeans).hasSize(1);
assertThat(initializerBeans).first().isInstanceOf(ServletListenerRegistrationBean.class)
.extracting((initializer) -> ((ServletListenerRegistrationBean<?>) initializer).getListener())
.isInstanceOf(HttpSessionIdListener.class);
}
private void load(Class<?>... configuration) {
this.context = new AnnotationConfigApplicationContext(configuration);
}
@Configuration(proxyBeanMethods = false)
static class ServletConfiguration {
@Bean
TestServlet testServlet() {
return new TestServlet();
}
}
@Configuration(proxyBeanMethods = false)
static class FilterConfiguration {
@Bean
TestFilter testFilter() {
return new TestFilter();
}
}
@Configuration(proxyBeanMethods = false)
static class TestConfiguration {
@Bean
TestServletContextInitializer testServletContextInitializer() {
return new TestServletContextInitializer();
}
@Bean
OtherTestServletContextInitializer otherTestServletContextInitializer() {
return new OtherTestServletContextInitializer();
}
}
@Configuration(proxyBeanMethods = false)
static class HttpSessionIdListenerConfiguration {
@Bean
HttpSessionIdListener httpSessionIdListener() {
return (event, oldId) -> {
};
}
}
static class TestServlet extends HttpServlet implements ServletContextInitializer {
@Override
public void onStartup(ServletContext servletContext) {
}
}
static class TestFilter implements Filter, ServletContextInitializer {
@Override
public void onStartup(ServletContext servletContext) {
}
@Override
public void init(FilterConfig filterConfig) {
}
@Override
public void doFilter(ServletRequest request, ServletResponse response, FilterChain chain) {
}
@Override
public void destroy() {
}
}
static class TestServletContextInitializer implements ServletContextInitializer {
@Override
public void onStartup(ServletContext servletContext) throws ServletException {
}
}
static class OtherTestServletContextInitializer implements ServletContextInitializer {
@Override
public void onStartup(ServletContext servletContext) throws ServletException {
}
}
}