Polish 'Fail fast when base path and an endpoint mapping are set to '/''

See gh-45251

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

@@ -1,27 +0,0 @@
-package smoketest.actuator;
-
-import org.junit.jupiter.api.Test;
-
-import org.springframework.beans.factory.BeanCreationException;
-import org.springframework.boot.SpringApplication;
-
-import static org.assertj.core.api.Assertions.assertThatThrownBy;
-
-/**
- * Verifies that an exception is thrown when management and server endpoint paths
- * conflict.
- *
- * @author Yongjun Hong
- */
-class ManagementEndpointConflictSmokeTest {
-
-	@Test
-	void shouldThrowExceptionWhenManagementAndServerPathsConflict() {
-		assertThatThrownBy(() -> {
-			SpringApplication.run(SampleActuatorApplication.class, "--management.endpoints.web.base-path=/",
-					"--management.endpoints.web.path-mapping.health=/");
-		}).isInstanceOf(BeanCreationException.class)
-			.hasMessageContaining("Management endpoints and endpoint path are both mapped to '/'");
-	}
-
-}

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

@@ -0,0 +1,42 @@
+/*
+ * Copyright 2012-2025 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 smoketest.actuator;
+
+import org.junit.jupiter.api.Test;
+
+import org.springframework.beans.factory.BeanCreationException;
+import org.springframework.boot.SpringApplication;
+
+import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
+
+/**
+ * Verifies that an exception is thrown when management and server endpoint paths
+ * conflict.
+ *
+ * @author Yongjun Hong
+ */
+class ManagementEndpointConflictSmokeTests {
+
+	@Test
+	void shouldThrowExceptionWhenManagementAndServerPathsConflict() {
+		assertThatExceptionOfType(BeanCreationException.class)
+			.isThrownBy(() -> SpringApplication.run(SampleActuatorApplication.class,
+					"--management.endpoints.web.base-path=/", "--management.endpoints.web.path-mapping.health=/"))
+			.withMessageContaining("Management base path and the 'health' actuator endpoint are both mapped to '/'");
+	}
+
+}