Provide links for actuators at / when using a separate management port

See gh-17418

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-actuator/src/test/java/smoketest/actuator/ManagementDifferentPortSampleActuatorApplicationTests.java

@@ -0,0 +1,37 @@
+package smoketest.actuator;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.actuate.autoconfigure.web.server.LocalManagementPort;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.boot.web.server.LocalServerPort;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT,
+		properties = { "management.endpoints.web.base-path=/","management.server.port=0"})
+public class ManagementDifferentPortSampleActuatorApplicationTests {
+
+	@LocalServerPort
+	private int port;
+
+	@LocalManagementPort
+	private int managementPort;
+
+	@Test
+	void testDifferentServerPort(){
+		if(this.managementPort != this.port) {
+			ResponseEntity<String> entity = new TestRestTemplate("user", getPassword())
+					.getForEntity("http://localhost:" + this.managementPort + "/", String.class);
+			assertThat(entity.getStatusCode()).isEqualTo(HttpStatus.OK);
+			assertThat(entity.getBody()).contains("\"_links\"");
+		}
+	}
+
+	private String getPassword(){
+		return "password";
+	}
+
+}

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-jersey/src/test/java/smoketest/jersey/JerseyDifferentPortSampleActuatorApplicationTests.java

@@ -0,0 +1,35 @@
+package smoketest.jersey;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.actuate.autoconfigure.web.server.LocalManagementPort;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.boot.web.server.LocalServerPort;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT, properties = {"management.server.port=0","management.endpoints.web.base-path=/"})
+public class JerseyDifferentPortSampleActuatorApplicationTests {
+
+	@LocalManagementPort
+	private int managementPort;
+
+	@LocalServerPort
+	private int port;
+
+	@Test
+	void testDifferentServerPort(){
+		if(this.managementPort != this.port) {
+			ResponseEntity<String> entity = new TestRestTemplate("user", getPassword())
+					.getForEntity("http://localhost:" + this.managementPort + "/", String.class);
+			assertThat(entity.getStatusCode()).isEqualTo(HttpStatus.OK);
+			assertThat(entity.getBody()).contains("\"_links\"");
+		}
+	}
+
+	private String getPassword(){
+		return "password";
+	}
+}

spring-boot-tests/spring-boot-smoke-tests/spring-boot-smoke-test-webflux/src/test/java/smoketest/webflux/WebFluxDifferentPortSampleActuatorApplicationTests.java

@@ -0,0 +1,35 @@
+package smoketest.webflux;
+
+import org.junit.jupiter.api.Test;
+import org.springframework.boot.actuate.autoconfigure.web.server.LocalManagementPort;
+import org.springframework.boot.test.context.SpringBootTest;
+import org.springframework.boot.test.web.client.TestRestTemplate;
+import org.springframework.boot.web.server.LocalServerPort;
+import org.springframework.http.HttpStatus;
+import org.springframework.http.ResponseEntity;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+@SpringBootTest(webEnvironment = SpringBootTest.WebEnvironment.RANDOM_PORT, properties = {"management.server.port=0","management.endpoints.web.base-path=/"})
+public class WebFluxDifferentPortSampleActuatorApplicationTests {
+
+	@LocalManagementPort
+	private int managementPort;
+
+	@LocalServerPort
+	private int port;
+
+	@Test
+	void testDifferentServerPort(){
+		if(this.managementPort != this.port) {
+			ResponseEntity<String> entity = new TestRestTemplate("user", getPassword())
+					.getForEntity("http://localhost:" + this.managementPort + "/", String.class);
+			assertThat(entity.getStatusCode()).isEqualTo(HttpStatus.OK);
+			assertThat(entity.getBody()).contains("\"_links\"");
+		}
+	}
+
+	private String getPassword(){
+		return "password";
+	}
+}