Guard reactive Cloud Foundry health extension

Move the reactive Cloud Foundry health endpoint extension into a
health-specific configuration guarded by @ConditionalOnClass. When
spring-boot-health is absent, scanning the outer configuration attempts
to resolve ReactiveHealthEndpointWebExtension and causes context refresh
to fail.

See gh-50916

Signed-off-by: Lee JiWon <dlwldnjs1009@gmail.com>

module/spring-boot-cloudfoundry/src/main/java/org/springframework/boot/cloudfoundry/autoconfigure/actuate/endpoint/reactive/CloudFoundryReactiveActuatorAutoConfiguration.java

@@ -83,15 +83,6 @@ public final class CloudFoundryReactiveActuatorAutoConfiguration {
 
 	private static final String BASE_PATH = "/cloudfoundryapplication";
 
-	@Bean
-	@ConditionalOnMissingBean
-	@ConditionalOnAvailableEndpoint
-	@ConditionalOnBean({ HealthEndpoint.class, ReactiveHealthEndpointWebExtension.class })
-	CloudFoundryReactiveHealthEndpointWebExtension cloudFoundryReactiveHealthEndpointWebExtension(
-			ReactiveHealthEndpointWebExtension reactiveHealthEndpointWebExtension) {
-		return new CloudFoundryReactiveHealthEndpointWebExtension(reactiveHealthEndpointWebExtension);
-	}
-
 	@Bean
 	@ConditionalOnMissingBean
 	@ConditionalOnAvailableEndpoint
@@ -151,6 +142,21 @@ public final class CloudFoundryReactiveActuatorAutoConfiguration {
 		return corsConfiguration;
 	}
 
+	@Configuration(proxyBeanMethods = false)
+	@ConditionalOnClass(HealthEndpoint.class)
+	static class HealthConfiguration {
+
+		@Bean
+		@ConditionalOnMissingBean
+		@ConditionalOnAvailableEndpoint
+		@ConditionalOnBean({ HealthEndpoint.class, ReactiveHealthEndpointWebExtension.class })
+		CloudFoundryReactiveHealthEndpointWebExtension cloudFoundryReactiveHealthEndpointWebExtension(
+				ReactiveHealthEndpointWebExtension reactiveHealthEndpointWebExtension) {
+			return new CloudFoundryReactiveHealthEndpointWebExtension(reactiveHealthEndpointWebExtension);
+		}
+
+	}
+
 	@Configuration(proxyBeanMethods = false)
 	@ConditionalOnClass(MatcherSecurityWebFilterChain.class)
 	static class IgnoredPathsSecurityConfiguration {

module/spring-boot-cloudfoundry/src/test/java/org/springframework/boot/cloudfoundry/autoconfigure/actuate/endpoint/reactive/CloudFoundryReactiveActuatorAutoConfigurationTests.java

@@ -59,6 +59,7 @@ import org.springframework.boot.ssl.SslBundle;
 import org.springframework.boot.ssl.jks.JksSslStoreBundle;
 import org.springframework.boot.ssl.jks.JksSslStoreDetails;
 import org.springframework.boot.test.context.runner.ReactiveWebApplicationContextRunner;
+import org.springframework.boot.testsupport.classpath.ClassPathExclusions;
 import org.springframework.boot.testsupport.classpath.resources.WithPackageResources;
 import org.springframework.boot.testsupport.classpath.resources.WithResource;
 import org.springframework.boot.webclient.WebClientCustomizer;
@@ -108,6 +109,17 @@ class CloudFoundryReactiveActuatorAutoConfigurationTests {
 				ProjectInfoAutoConfiguration.class, CloudFoundryReactiveActuatorAutoConfiguration.class))
 		.withUserConfiguration(UserDetailsServiceConfiguration.class);
 
+	private final ReactiveWebApplicationContextRunner withoutHealthContextRunner = new ReactiveWebApplicationContextRunner()
+		.withConfiguration(
+				AutoConfigurations.of(ReactiveWebSecurityAutoConfiguration.class, WebFluxAutoConfiguration.class,
+						JacksonAutoConfiguration.class, HttpMessageConvertersAutoConfiguration.class,
+						PropertyPlaceholderAutoConfiguration.class, WebClientCustomizerConfig.class,
+						WebClientAutoConfiguration.class, ManagementContextAutoConfiguration.class,
+						EndpointAutoConfiguration.class, WebEndpointAutoConfiguration.class,
+						InfoContributorAutoConfiguration.class, InfoEndpointAutoConfiguration.class,
+						ProjectInfoAutoConfiguration.class, CloudFoundryReactiveActuatorAutoConfiguration.class))
+		.withUserConfiguration(UserDetailsServiceConfiguration.class);
+
 	private static final String BASE_PATH = "/cloudfoundryapplication";
 
 	@AfterEach
@@ -115,6 +127,15 @@ class CloudFoundryReactiveActuatorAutoConfigurationTests {
 		HttpResources.reset();
 	}
 
+	@Test
+	@ClassPathExclusions(packages = "org.springframework.boot.health.actuate.endpoint")
+	void refreshSucceedsWithoutHealth() {
+		this.withoutHealthContextRunner
+			.withPropertyValues("VCAP_APPLICATION:---", "vcap.application.application_id:my-app-id",
+					"vcap.application.cf_api:https://my-cloud-controller.com")
+			.run((context) -> assertThat(context).hasNotFailed());
+	}
+
 	@Test
 	void cloudFoundryPlatformActive() {
 		this.contextRunner