ServletEndpointManagementContextConfiguration not consistent with JerseyAutoConfiguration

[nioertel]

While upgrading from Spring Boot 2.1.0 to 2.1.1 some of our tests started failing as the ApplicationContext couldn't be loaded because of:

Caused by: org.springframework.beans.factory.NoSuchBeanDefinitionException: No qualifying bean of type 'org.springframework.boot.autoconfigure.web.servlet.JerseyApplicationPath' available
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:343)
	at org.springframework.beans.factory.support.DefaultListableBeanFactory.getBean(DefaultListableBeanFactory.java:335)
	at org.springframework.context.support.AbstractApplicationContext.getBean(AbstractApplicationContext.java:1101)
	at org.springframework.boot.actuate.autoconfigure.endpoint.web.ServletEndpointManagementContextConfiguration$JerseyServletEndpointManagementContextConfiguration.servletEndpointRegistrar(ServletEndpointManagementContextConfiguration.java:98)

I created a minimal project to reproduce the issue:

<?xml version="1.0" encoding="UTF-8"?>
<project xmlns="http://maven.apache.org/POM/4.0.0"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
	xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
	<modelVersion>4.0.0</modelVersion>

	<groupId>jersey-issue</groupId>
	<artifactId>jersey-issue</artifactId>

	<parent>
		<groupId>org.springframework.boot</groupId>
		<artifactId>spring-boot-starter-parent</artifactId>
		<version>2.1.1.RELEASE</version>
	</parent>

	<dependencies>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-actuator</artifactId>
		</dependency>
		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-jersey</artifactId>
		</dependency>

		<dependency>
			<groupId>org.springframework.boot</groupId>
			<artifactId>spring-boot-starter-test</artifactId>
			<scope>test</scope>
		</dependency>
	</dependencies>
</project>

Two classes under src/test/java:
DummyApplication.java:

package test;

import org.springframework.boot.autoconfigure.SpringBootApplication;

@SpringBootApplication
public class DummyApplication {
}

DummyTest.java:

package test;

import org.assertj.core.api.BDDAssertions;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.springframework.boot.test.context.SpringBootTest;
import org.springframework.test.context.junit4.SpringRunner;

@RunWith(SpringRunner.class)
@SpringBootTest
public class DummyTest {

	@Test
	public void dummyTest() {
		BDDAssertions.assertThat(true).isTrue();
	}

}

When downgrading to Spring Boot 2.1.0.RELEASE, the test runs green.
Running on JDK 1.8.0_112, Maven 3.5.2

[nioertel]

As there is no assurance that an actual ResourceConfig bean is present here:

@ConditionalOnClass(ResourceConfig.class)
ServletEndpointManagementContextConfiguration::JerseyServletEndpointManagementContextConfiguration

I feel it was not safe to add

JerseyApplicationPath jerseyApplicationPath = this.context
       .getBean(JerseyApplicationPath.class);

in Spring Boot 2.1.1.

[mbhave]

Since JerseyWebEndpointManagementContextConfiguration adds a ResourceConfig bean if one isn't present, this might be an ordering issue.