Fix checkstyle violations

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/web/annotation/ControllerEndpointDiscovererTests.java

@@ -122,9 +122,8 @@ class ControllerEndpointDiscovererTests {
 
 	@Test
 	void getEndpointWhenEndpointHasOperationsShouldThrowException() {
-		this.contextRunner.withUserConfiguration(TestControllerWithOperation.class)
-				.run(assertDiscoverer((discoverer) -> assertThatIllegalStateException()
-						.isThrownBy(discoverer::getEndpoints)
+		this.contextRunner.withUserConfiguration(TestControllerWithOperation.class).run(
+				assertDiscoverer((discoverer) -> assertThatIllegalStateException().isThrownBy(discoverer::getEndpoints)
 						.withMessageContaining("ControllerEndpoints must not declare operations")));
 	}
 

spring-boot-project/spring-boot-actuator/src/test/java/org/springframework/boot/actuate/endpoint/web/annotation/ServletEndpointDiscovererTests.java

@@ -105,9 +105,8 @@ class ServletEndpointDiscovererTests {
 
 	@Test
 	void getEndpointWhenEndpointHasOperationsShouldThrowException() {
-		this.contextRunner.withUserConfiguration(TestServletEndpointWithOperation.class)
-				.run(assertDiscoverer((discoverer) -> assertThatIllegalStateException()
-						.isThrownBy(discoverer::getEndpoints)
+		this.contextRunner.withUserConfiguration(TestServletEndpointWithOperation.class).run(
+				assertDiscoverer((discoverer) -> assertThatIllegalStateException().isThrownBy(discoverer::getEndpoints)
 						.withMessageContaining("ServletEndpoints must not declare operations")));
 	}
 

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/packagestest/one/FirstConfiguration.java

@@ -16,7 +16,6 @@
 
 package org.springframework.boot.autoconfigure.packagestest.one;
 
-import org.springframework.boot.autoconfigure.AutoConfigurationPackagesTests;
 import org.springframework.boot.autoconfigure.AutoConfigurationPackagesTests.TestRegistrar;
 import org.springframework.context.annotation.Configuration;
 import org.springframework.context.annotation.Import;

spring-boot-tests/spring-boot-integration-tests/spring-boot-server-tests/src/test/java/org/springframework/boot/context/embedded/EmbeddedServerContainerInvocationContextProvider.java

@@ -5,7 +5,7 @@
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
- *      http://www.apache.org/licenses/LICENSE-2.0
+ *      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,
@@ -75,15 +75,17 @@ class EmbeddedServerContainerInvocationContextProvider
 		EmbeddedServletContainerTest annotation = context.getRequiredTestClass()
 				.getAnnotation(EmbeddedServletContainerTest.class);
 		return CONTAINERS.stream()
-				.map((container) -> new ApplicationBuilder(this.tempDir, annotation.packaging(), container))
-				.flatMap((builder) -> {
-					return Stream.of(annotation.launchers())
-							.map((launcherClass) -> ReflectionUtils.newInstance(launcherClass, builder, buildOutput))
-							.map((launcher) -> new EmbeddedServletContainerInvocationContext(
-									StringUtils.capitalize(builder.getContainer()) + ": "
-											+ launcher.getDescription(builder.getPackaging()),
-									launcher));
-				});
+				.map((container) -> new ApplicationBuilder(this.tempDir, annotation.packaging(),
+						container))
+				.flatMap(
+						(builder) -> Stream
+								.of(annotation.launchers()).map(
+										(launcherClass) -> ReflectionUtils.newInstance(launcherClass, builder,
+												buildOutput))
+								.map((launcher) -> new EmbeddedServletContainerInvocationContext(
+										StringUtils.capitalize(builder.getContainer()) + ": "
+												+ launcher.getDescription(builder.getPackaging()),
+										launcher)));
 	}
 
 	@Override
@@ -135,7 +137,7 @@ class EmbeddedServerContainerInvocationContextProvider
 
 	}
 
-	private static class RestTemplateParameterResolver implements ParameterResolver {
+	private static final class RestTemplateParameterResolver implements ParameterResolver {
 
 		private final AbstractApplicationLauncher launcher;
 

spring-boot-tests/spring-boot-integration-tests/spring-boot-server-tests/src/test/java/org/springframework/boot/context/embedded/EmbeddedServletContainerTest.java

@@ -5,7 +5,7 @@
  * you may not use this file except in compliance with the License.
  * You may obtain a copy of the License at
  *
- *      http://www.apache.org/licenses/LICENSE-2.0
+ *      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,
@@ -16,19 +16,20 @@
 
 package org.springframework.boot.context.embedded;
 
+import java.lang.annotation.ElementType;
 import java.lang.annotation.Retention;
+import java.lang.annotation.RetentionPolicy;
 import java.lang.annotation.Target;
 
 import org.junit.jupiter.api.extension.ExtendWith;
 
-import static java.lang.annotation.ElementType.TYPE;
-import static java.lang.annotation.RetentionPolicy.RUNTIME;
-
 /**
- * @author awilkinson
+ * Annotation used to configure servlet container tests.
+ *
+ * @author Andy Wilkinson
  */
-@Retention(RUNTIME)
-@Target(TYPE)
+@Retention(RetentionPolicy.RUNTIME)
+@Target(ElementType.TYPE)
 @ExtendWith(EmbeddedServerContainerInvocationContextProvider.class)
 public @interface EmbeddedServletContainerTest {
 

src/checkstyle/checkstyle-suppressions.xml

@@ -3,6 +3,7 @@
 		"-//Checkstyle//DTD SuppressionFilter Configuration 1.2//EN"
 		"https://checkstyle.org/dtds/suppressions_1_2.dtd">
 <suppressions>
+	<suppress files="[\\/]src[\\/]test[\\/]" checks="RedundantModifier" />
 	<suppress files="SpringApplicationTests\.java" checks="FinalClass" />
 	<suppress files=".+Configuration\.java" checks="HideUtilityClassConstructor" />
 	<suppress files=".+Application\.java" checks="HideUtilityClassConstructor" />

src/checkstyle/nohttp-checkstyle-suppressions.xml

@@ -6,7 +6,7 @@
 	<suppress files="[\\/]transaction-logs[\\/]" checks="NoHttp" />
 	<suppress files="[\\/]target[\\/]" checks="NoHttp" />
 	<suppress files="[\\/]build.log" checks="NoHttp" />
-	<suppress files=".+\.(jar|git|ico|p12|gif|jks|jpg)" checks="NoHttp" />
+	<suppress files=".+\.(jar|git|ico|p12|gif|jks|jpg|svg)" checks="NoHttp" />
 	<suppress files="dependency-reduced-pom.xml" checks="NoHttp" />
 	<suppress files="jquery.validate.js" checks="NoHttp" />
 	<suppress files="jquery-[0-9]\.[0-9]\.[0-9].js" checks="NoHttp" />