Polish

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/elasticsearch/ElasticSearchRestHealthContributorAutoConfiguration.java

@@ -45,7 +45,6 @@ import org.springframework.context.annotation.Configuration;
 @ConditionalOnBean(RestClient.class)
 @ConditionalOnEnabledHealthIndicator("elasticsearch")
 @AutoConfigureAfter(RestClientAutoConfiguration.class)
-@SuppressWarnings("deprecation")
 public class ElasticSearchRestHealthContributorAutoConfiguration
 		extends CompositeHealthContributorConfiguration<ElasticsearchRestHealthIndicator, RestClient> {
 

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/security/reactive/EndpointRequest.java

@@ -164,11 +164,11 @@ public final class EndpointRequest {
 		}
 
 		private EndpointServerWebExchangeMatcher(Class<?>[] endpoints, boolean includeLinks) {
-			this(Arrays.asList(endpoints), Collections.emptyList(), includeLinks);
+			this(Arrays.asList((Object[]) endpoints), Collections.emptyList(), includeLinks);
 		}
 
 		private EndpointServerWebExchangeMatcher(String[] endpoints, boolean includeLinks) {
-			this(Arrays.asList(endpoints), Collections.emptyList(), includeLinks);
+			this(Arrays.asList((Object[]) endpoints), Collections.emptyList(), includeLinks);
 		}
 
 		private EndpointServerWebExchangeMatcher(List<Object> includes, List<Object> excludes, boolean includeLinks) {

spring-boot-project/spring-boot-actuator-autoconfigure/src/main/java/org/springframework/boot/actuate/autoconfigure/security/servlet/EndpointRequest.java

@@ -196,11 +196,11 @@ public final class EndpointRequest {
 		}
 
 		private EndpointRequestMatcher(Class<?>[] endpoints, boolean includeLinks) {
-			this(Arrays.asList(endpoints), Collections.emptyList(), includeLinks);
+			this(Arrays.asList((Object[]) endpoints), Collections.emptyList(), includeLinks);
 		}
 
 		private EndpointRequestMatcher(String[] endpoints, boolean includeLinks) {
-			this(Arrays.asList(endpoints), Collections.emptyList(), includeLinks);
+			this(Arrays.asList((Object[]) endpoints), Collections.emptyList(), includeLinks);
 		}
 
 		private EndpointRequestMatcher(List<Object> includes, List<Object> excludes, boolean includeLinks) {

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/context/properties/ConfigurationPropertiesReportEndpoint.java

@@ -186,7 +186,7 @@ public class ConfigurationPropertiesReportEndpoint implements ApplicationContext
 	 * @param prefix the prefix
 	 * @return the serialized instance
 	 */
-	@SuppressWarnings({ "unchecked", "rawtypes" })
+	@SuppressWarnings({ "unchecked" })
 	private Map<String, Object> safeSerialize(ObjectMapper mapper, Object bean, String prefix) {
 		try {
 			return new HashMap<>(mapper.convertValue(bean, Map.class));

spring-boot-project/spring-boot-actuator/src/main/java/org/springframework/boot/actuate/endpoint/web/jersey/JerseyEndpointResourceFactory.java

@@ -162,12 +162,10 @@ public class JerseyEndpointResourceFactory {
 			}
 		}
 
+		@SuppressWarnings("unchecked")
 		private Map<String, Object> extractBodyArguments(ContainerRequestContext data) {
 			Map<String, Object> entity = ((ContainerRequest) data).readEntity(Map.class);
-			if (entity == null) {
-				return Collections.emptyMap();
-			}
-			return entity;
+			return (entity != null) ? entity : Collections.emptyMap();
 		}
 
 		private Map<String, Object> extractPathParameters(ContainerRequestContext requestContext) {

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/couchbase/ClusterEnvironmentBuilderCustomizer.java

@@ -20,8 +20,10 @@ import com.couchbase.client.java.env.ClusterEnvironment;
 
 /**
  * Callback interface that can be implemented by beans wishing to customize the
- * {@link ClusterEnvironment} via a {@link ClusterEnvironment.Builder} whilst retaining
- * default auto-configuration.whilst retaining default auto-configuration.
+ * {@link ClusterEnvironment} via a
+ * {@link com.couchbase.client.java.env.ClusterEnvironment.Builder
+ * ClusterEnvironment.Builder} whilst retaining default auto-configuration.whilst
+ * retaining default auto-configuration.
  *
  * @author Stephane Nicoll
  * @since 2.3.0
@@ -30,7 +32,8 @@ import com.couchbase.client.java.env.ClusterEnvironment;
 public interface ClusterEnvironmentBuilderCustomizer {
 
 	/**
-	 * Customize the {@link ClusterEnvironment.Builder}.
+	 * Customize the {@link com.couchbase.client.java.env.ClusterEnvironment.Builder
+	 * ClusterEnvironment.Builder}.
 	 * @param builder the builder to customize
 	 */
 	void customize(ClusterEnvironment.Builder builder);

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/mongo/MongoClientFactorySupport.java

@@ -33,6 +33,7 @@ import org.springframework.util.Assert;
 /**
  * Base class for setup that is common to MongoDB client factories.
  *
+ * @param <T> the mongo client type
  * @author Christoph Strobl
  * @author Scott Frederick
  * @since 2.3.0

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/r2dbc/ConnectionFactoryBuilder.java

@@ -136,8 +136,8 @@ public final class ConnectionFactoryBuilder {
 	static class ConnectionFactoryOptionsInitializer {
 
 		/**
-		 * Initialize a {@link ConnectionFactoryOptions.Builder} using the specified
-		 * properties.
+		 * Initialize a {@link io.r2dbc.spi.ConnectionFactoryOptions.Builder
+		 * ConnectionFactoryOptions.Builder} using the specified properties.
 		 * @param properties the properties to use to initialize the builder
 		 * @param embeddedDatabaseConnection the embedded connection to use as a fallback
 		 * @return an initialized builder

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/embedded/UndertowWebServerFactoryCustomizer.java

@@ -169,6 +169,7 @@ public class UndertowWebServerFactoryCustomizer
 			return (value) -> this.factory.addBuilderCustomizers((builder) -> builder.setSocketOption(option, value));
 		}
 
+		@SuppressWarnings("unchecked")
 		<T> Consumer<Map<String, String>> forEach(Function<Option<T>, Consumer<T>> function) {
 			return (map) -> map.forEach((key, value) -> {
 				Option<T> option = (Option<T>) NAME_LOOKUP.get(getCanonicalName(key));

spring-boot-project/spring-boot-autoconfigure/src/main/java/org/springframework/boot/autoconfigure/web/format/WebConversionService.java

@@ -19,9 +19,6 @@ package org.springframework.boot.autoconfigure.web.format;
 import java.time.format.DateTimeFormatter;
 import java.time.format.ResolverStyle;
 
-import org.apache.commons.logging.Log;
-import org.apache.commons.logging.LogFactory;
-
 import org.springframework.format.datetime.DateFormatter;
 import org.springframework.format.datetime.DateFormatterRegistrar;
 import org.springframework.format.datetime.standard.DateTimeFormatterRegistrar;
@@ -49,8 +46,6 @@ public class WebConversionService extends DefaultFormattingConversionService {
 	private static final boolean JSR_354_PRESENT = ClassUtils.isPresent("javax.money.MonetaryAmount",
 			WebConversionService.class.getClassLoader());
 
-	private static final Log logger = LogFactory.getLog(WebConversionService.class);
-
 	private final String dateFormat;
 
 	/**

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/couchbase/CouchbaseContainer.java

@@ -64,6 +64,7 @@ import static org.testcontainers.shaded.org.apache.commons.codec.binary.Base64.e
  * Temporary copy of TestContainers's Couchbase support until it works against Couchbase
  * SDK v3.
  */
+@SuppressWarnings("resource")
 class CouchbaseContainer extends GenericContainer<CouchbaseContainer> {
 
 	public static final String VERSION = "5.5.1";
@@ -198,7 +199,6 @@ class CouchbaseContainer extends GenericContainer<CouchbaseContainer> {
 	}
 
 	@Override
-	@SuppressWarnings({ "unchecked", "ConstantConditions" })
 	public void stop() {
 		try {
 			stopCluster();

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/kafka/KafkaAutoConfigurationTests.java

@@ -667,6 +667,7 @@ class KafkaAutoConfigurationTests {
 	@Configuration(proxyBeanMethods = false)
 	static class ConsumerFactoryConfiguration {
 
+		@SuppressWarnings("unchecked")
 		private final ConsumerFactory<String, Object> consumerFactory = mock(ConsumerFactory.class);
 
 		@Bean

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/mongo/MongoClientFactorySupportTests.java

@@ -42,6 +42,7 @@ import static org.mockito.Mockito.verify;
 /**
  * Tests for {@link MongoClientFactorySupport}.
  *
+ * @param <T> the mongo client type
  * @author Phillip Webb
  * @author Andy Wilkinson
  * @author Stephane Nicoll

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/r2dbc/R2dbcAutoConfigurationTests.java

@@ -167,10 +167,8 @@ class R2dbcAutoConfigurationTests {
 		this.contextRunner.withPropertyValues("spring.r2dbc.pool.enabled=false", "spring.r2dbc.url:r2dbc:simple://foo",
 				"spring.r2dbc.properties.test=value", "spring.r2dbc.properties.another=2").run((context) -> {
 					SimpleTestConnectionFactory connectionFactory = context.getBean(SimpleTestConnectionFactory.class);
-					assertThat((Object) connectionFactory.options.getRequiredValue(Option.valueOf("test")))
-							.isEqualTo("value");
-					assertThat((Object) connectionFactory.options.getRequiredValue(Option.valueOf("another")))
-							.isEqualTo("2");
+					assertThat(getRequiredOptionsValue(connectionFactory, "test")).isEqualTo("value");
+					assertThat(getRequiredOptionsValue(connectionFactory, "another")).isEqualTo("2");
 				});
 	}
 
@@ -181,13 +179,15 @@ class R2dbcAutoConfigurationTests {
 					assertThat(context).hasSingleBean(ConnectionFactory.class).hasSingleBean(ConnectionPool.class);
 					SimpleTestConnectionFactory connectionFactory = (SimpleTestConnectionFactory) context
 							.getBean(ConnectionPool.class).unwrap();
-					assertThat((Object) connectionFactory.options.getRequiredValue(Option.valueOf("test")))
-							.isEqualTo("value");
-					assertThat((Object) connectionFactory.options.getRequiredValue(Option.valueOf("another")))
-							.isEqualTo("2");
+					assertThat(getRequiredOptionsValue(connectionFactory, "test")).isEqualTo("value");
+					assertThat(getRequiredOptionsValue(connectionFactory, "another")).isEqualTo("2");
 				});
 	}
 
+	private Object getRequiredOptionsValue(SimpleTestConnectionFactory connectionFactory, String name) {
+		return connectionFactory.options.getRequiredValue(Option.valueOf(name));
+	}
+
 	@Test
 	void configureWithoutUrlShouldCreateEmbeddedConnectionPoolByDefault() {
 		this.contextRunner.run((context) -> assertThat(context).hasSingleBean(ConnectionFactory.class)

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/security/oauth2/resource/reactive/ReactiveOAuth2ResourceServerAutoConfigurationTests.java

@@ -350,7 +350,7 @@ class ReactiveOAuth2ResourceServerAutoConfigurationTests {
 				.run((context) -> {
 					assertThat(context).hasSingleBean(ReactiveJwtDecoder.class);
 					ReactiveJwtDecoder reactiveJwtDecoder = context.getBean(ReactiveJwtDecoder.class);
-					DelegatingOAuth2TokenValidator<Jwt> jwtValidator = (DelegatingOAuth2TokenValidator) ReflectionTestUtils
+					DelegatingOAuth2TokenValidator<Jwt> jwtValidator = (DelegatingOAuth2TokenValidator<Jwt>) ReflectionTestUtils
 							.getField(reactiveJwtDecoder, "jwtValidator");
 					Collection<OAuth2TokenValidator<Jwt>> tokenValidators = (Collection<OAuth2TokenValidator<Jwt>>) ReflectionTestUtils
 							.getField(jwtValidator, "tokenValidators");

spring-boot-project/spring-boot-autoconfigure/src/test/java/org/springframework/boot/autoconfigure/security/oauth2/resource/servlet/OAuth2ResourceServerAutoConfigurationTests.java

@@ -338,7 +338,7 @@ class OAuth2ResourceServerAutoConfigurationTests {
 				.run((context) -> {
 					assertThat(context).hasSingleBean(JwtDecoder.class);
 					JwtDecoder jwtDecoder = context.getBean(JwtDecoder.class);
-					DelegatingOAuth2TokenValidator<Jwt> jwtValidator = (DelegatingOAuth2TokenValidator) ReflectionTestUtils
+					DelegatingOAuth2TokenValidator<Jwt> jwtValidator = (DelegatingOAuth2TokenValidator<Jwt>) ReflectionTestUtils
 							.getField(jwtDecoder, "jwtValidator");
 					Collection<OAuth2TokenValidator<Jwt>> tokenValidators = (Collection<OAuth2TokenValidator<Jwt>>) ReflectionTestUtils
 							.getField(jwtValidator, "tokenValidators");

spring-boot-project/spring-boot-test/src/main/java/org/springframework/boot/test/context/runner/AbstractApplicationContextRunner.java

@@ -376,6 +376,7 @@ public abstract class AbstractApplicationContextRunner<SELF extends AbstractAppl
 	 * @param consumer the consumer of the created {@link ApplicationContext}
 	 * @return this instance
 	 */
+	@SuppressWarnings("unchecked")
 	public SELF run(ContextConsumer<? super A> consumer) {
 		withContextClassLoader(this.classLoader, () -> this.systemProperties.applyToSystemProperties(() -> {
 			try (A context = createAssertableContext()) {

spring-boot-project/spring-boot-test/src/main/java/org/springframework/boot/test/system/OutputCaptureRule.java

@@ -20,7 +20,7 @@ import java.util.ArrayList;
 import java.util.List;
 
 import org.hamcrest.Matcher;
-import org.junit.Assert;
+import org.hamcrest.MatcherAssert;
 import org.junit.Rule;
 import org.junit.rules.TestRule;
 import org.junit.runner.Description;
@@ -70,7 +70,7 @@ public class OutputCaptureRule implements TestRule, CapturedOutput {
 					try {
 						if (!OutputCaptureRule.this.matchers.isEmpty()) {
 							String output = OutputCaptureRule.this.delegate.toString();
-							Assert.assertThat(output, allOf(OutputCaptureRule.this.matchers));
+							MatcherAssert.assertThat(output, allOf(OutputCaptureRule.this.matchers));
 						}
 					}
 					finally {

spring-boot-project/spring-boot-tools/spring-boot-configuration-processor/src/test/java/org/springframework/boot/configurationsample/generic/GenericBuilderProperties.java

@@ -30,6 +30,7 @@ public class GenericBuilderProperties<T extends GenericBuilderProperties<T>> {
 		return this.number;
 	}
 
+	@SuppressWarnings("unchecked")
 	public T setNumber(int number) {
 		this.number = number;
 		return (T) this;

spring-boot-project/spring-boot-tools/spring-boot-configuration-processor/src/test/java/org/springframework/boot/configurationsample/method/SingleConstructorMethodConfig.java

@@ -24,6 +24,7 @@ import org.springframework.boot.configurationsample.ConfigurationProperties;
  *
  * @author Stephane Nicoll
  */
+@SuppressWarnings("unused")
 public class SingleConstructorMethodConfig {
 
 	@ConfigurationProperties(prefix = "foo")

spring-boot-project/spring-boot-tools/spring-boot-configuration-processor/src/test/java/org/springframework/boot/configurationsample/specific/TwoConstructorsClassConstructorBindingExample.java

@@ -24,6 +24,7 @@ import org.springframework.boot.configurationsample.MetaConstructorBinding;
  * @author Stephane Nicoll
  */
 @MetaConstructorBinding
+@SuppressWarnings("unused")
 public class TwoConstructorsClassConstructorBindingExample {
 
 	private String name;

spring-boot-project/spring-boot-tools/spring-boot-maven-plugin/src/main/java/org/springframework/boot/maven/AbstractRunMojo.java

@@ -240,10 +240,6 @@ public abstract class AbstractRunMojo extends AbstractDependencyFilterMojo {
 				|| (this.systemPropertyVariables != null && !this.systemPropertyVariables.isEmpty());
 	}
 
-	private boolean hasEnvVariables() {
-		return (this.environmentVariables != null && !this.environmentVariables.isEmpty());
-	}
-
 	private boolean hasWorkingDirectorySet() {
 		return this.workingDirectory != null;
 	}

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/json/JacksonJsonParserTests.java

@@ -41,6 +41,7 @@ class JacksonJsonParserTests extends AbstractJsonParserTests {
 	}
 
 	@Test
+	@SuppressWarnings("unchecked")
 	void instanceWithSpecificObjectMapper() throws IOException {
 		ObjectMapper objectMapper = spy(new ObjectMapper());
 		new JacksonJsonParser(objectMapper).parseMap("{}");

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/logging/logback/LogbackConfigurationTests.java

@@ -77,7 +77,7 @@ class LogbackConfigurationTests {
 		Appender<ILoggingEvent> appender = context.getLogger("ROOT").getAppender("FILE");
 		assertThat(appender).isInstanceOf(RollingFileAppender.class);
 		RollingPolicy rollingPolicy = ((RollingFileAppender<?>) appender).getRollingPolicy();
-		String fileNamePattern = ((SizeAndTimeBasedRollingPolicy) rollingPolicy).getFileNamePattern();
+		String fileNamePattern = ((SizeAndTimeBasedRollingPolicy<?>) rollingPolicy).getFileNamePattern();
 		assertThat(fileNamePattern).endsWith("spring.log.%d{yyyy-MM-dd}.%i.gz");
 	}
 
@@ -90,7 +90,7 @@ class LogbackConfigurationTests {
 		Appender<ILoggingEvent> appender = context.getLogger("ROOT").getAppender("FILE");
 		assertThat(appender).isInstanceOf(RollingFileAppender.class);
 		RollingPolicy rollingPolicy = ((RollingFileAppender<?>) appender).getRollingPolicy();
-		String fileNamePattern = ((SizeAndTimeBasedRollingPolicy) rollingPolicy).getFileNamePattern();
+		String fileNamePattern = ((SizeAndTimeBasedRollingPolicy<?>) rollingPolicy).getFileNamePattern();
 		assertThat(fileNamePattern).endsWith("my.log.%d{yyyyMMdd}.%i.gz");
 	}
 

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/embedded/tomcat/TomcatReactiveWebServerFactoryTests.java

@@ -37,6 +37,7 @@ import org.apache.catalina.startup.Tomcat;
 import org.apache.catalina.valves.RemoteIpValve;
 import org.apache.coyote.ProtocolHandler;
 import org.apache.coyote.http11.AbstractHttp11Protocol;
+import org.assertj.core.api.ThrowableAssert.ThrowingCallable;
 import org.junit.jupiter.api.Disabled;
 import org.junit.jupiter.api.Test;
 import org.mockito.ArgumentCaptor;
@@ -46,7 +47,6 @@ import org.springframework.boot.web.reactive.server.AbstractReactiveWebServerFac
 import org.springframework.boot.web.reactive.server.AbstractReactiveWebServerFactoryTests;
 import org.springframework.boot.web.server.PortInUseException;
 import org.springframework.boot.web.server.Shutdown;
-import org.springframework.boot.web.server.Ssl;
 import org.springframework.boot.web.server.WebServerException;
 import org.springframework.http.server.reactive.HttpHandler;
 import org.springframework.util.SocketUtils;
@@ -55,7 +55,6 @@ import org.springframework.web.reactive.function.client.WebClient;
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
 import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;
-import static org.assertj.core.api.Assertions.assertThatThrownBy;
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.Mockito.inOrder;
 import static org.mockito.Mockito.mock;
@@ -75,14 +74,16 @@ class TomcatReactiveWebServerFactoryTests extends AbstractReactiveWebServerFacto
 		return new TomcatReactiveWebServerFactory(0);
 	}
 
+	@Override
 	@Test
 	@Disabled("gh-19702")
-	void compressionOfResponseToGetRequest() {
+	protected void compressionOfResponseToGetRequest() {
 	}
 
+	@Override
 	@Test
 	@Disabled("gh-19702")
-	void compressionOfResponseToPostRequest() {
+	protected void compressionOfResponseToPostRequest() {
 	}
 
 	@Test
@@ -248,18 +249,9 @@ class TomcatReactiveWebServerFactoryTests extends AbstractReactiveWebServerFacto
 		});
 	}
 
-	@Test
-	void sslWithInvalidAliasFailsDuringStartup() {
-		String keyStore = "classpath:test.jks";
-		String keyPassword = "password";
-		AbstractReactiveWebServerFactory factory = getFactory();
-		Ssl ssl = new Ssl();
-		ssl.setKeyStore(keyStore);
-		ssl.setKeyPassword(keyPassword);
-		ssl.setKeyAlias("test-alias-404");
-		factory.setSsl(ssl);
-		assertThatThrownBy(() -> factory.getWebServer(new EchoHandler()).start())
-				.isInstanceOf(WebServerException.class);
+	@Override
+	protected void assertThatSslWithInvalidAliasCallFails(ThrowingCallable call) {
+		assertThatExceptionOfType(WebServerException.class).isThrownBy(call);
 	}
 
 	@Test

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/embedded/tomcat/TomcatServletWebServerFactoryTests.java

@@ -65,18 +65,16 @@ import org.apache.http.impl.client.HttpClients;
 import org.apache.jasper.servlet.JspServlet;
 import org.apache.tomcat.JarScanFilter;
 import org.apache.tomcat.JarScanType;
+import org.assertj.core.api.ThrowableAssert.ThrowingCallable;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.Test;
 import org.mockito.ArgumentCaptor;
 import org.mockito.InOrder;
 
 import org.springframework.boot.testsupport.system.CapturedOutput;
-import org.springframework.boot.testsupport.web.servlet.ExampleServlet;
 import org.springframework.boot.web.server.PortInUseException;
 import org.springframework.boot.web.server.Shutdown;
-import org.springframework.boot.web.server.Ssl;
 import org.springframework.boot.web.server.WebServerException;
-import org.springframework.boot.web.servlet.ServletRegistrationBean;
 import org.springframework.boot.web.servlet.server.AbstractServletWebServerFactory;
 import org.springframework.boot.web.servlet.server.AbstractServletWebServerFactoryTests;
 import org.springframework.core.io.ByteArrayResource;
@@ -93,7 +91,6 @@ import org.springframework.web.client.RestTemplate;
 import static org.assertj.core.api.Assertions.assertThat;
 import static org.assertj.core.api.Assertions.assertThatExceptionOfType;
 import static org.assertj.core.api.Assertions.assertThatIllegalArgumentException;
-import static org.assertj.core.api.Assertions.assertThatThrownBy;
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.Mockito.inOrder;
 import static org.mockito.Mockito.mock;
@@ -555,14 +552,9 @@ class TomcatServletWebServerFactoryTests extends AbstractServletWebServerFactory
 		this.webServer.start();
 	}
 
-	@Test
-	void sslWithInvalidAliasFailsDuringStartup() {
-		AbstractServletWebServerFactory factory = getFactory();
-		Ssl ssl = getSsl(null, "password", "test-alias-404", "src/test/resources/test.jks");
-		factory.setSsl(ssl);
-		ServletRegistrationBean<ExampleServlet> registration = new ServletRegistrationBean<>(
-				new ExampleServlet(true, false), "/hello");
-		assertThatThrownBy(() -> factory.getWebServer(registration).start()).isInstanceOf(WebServerException.class);
+	@Override
+	protected void assertThatSslWithInvalidAliasCallFails(ThrowingCallable call) {
+		assertThatExceptionOfType(WebServerException.class).isThrownBy(call);
 	}
 
 	@Test

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/reactive/server/AbstractReactiveWebServerFactoryTests.java

@@ -43,6 +43,7 @@ import io.netty.handler.codec.http.HttpResponse;
 import io.netty.handler.ssl.SslContextBuilder;
 import io.netty.handler.ssl.SslProvider;
 import io.netty.handler.ssl.util.InsecureTrustManagerFactory;
+import org.assertj.core.api.ThrowableAssert.ThrowingCallable;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.Test;
 import reactor.core.publisher.Mono;
@@ -178,8 +179,11 @@ public abstract class AbstractReactiveWebServerFactoryTests {
 		ssl.setKeyPassword(keyPassword);
 		ssl.setKeyAlias("test-alias-404");
 		factory.setSsl(ssl);
-		assertThatThrownBy(() -> factory.getWebServer(new EchoHandler()).start())
-				.hasStackTraceContaining("Keystore does not contain specified alias 'test-alias-404'");
+		assertThatSslWithInvalidAliasCallFails(() -> factory.getWebServer(new EchoHandler()).start());
+	}
+
+	protected void assertThatSslWithInvalidAliasCallFails(ThrowingCallable call) {
+		assertThatThrownBy(call).hasStackTraceContaining("Keystore does not contain specified alias 'test-alias-404'");
 	}
 
 	protected ReactorClientHttpConnector buildTrustAllSslConnector() {
@@ -280,7 +284,7 @@ public abstract class AbstractReactiveWebServerFactoryTests {
 	}
 
 	@Test
-	void compressionOfResponseToGetRequest() {
+	protected void compressionOfResponseToGetRequest() {
 		WebClient client = prepareCompressionTest();
 		ResponseEntity<Void> response = client.get().exchange().flatMap((res) -> res.toEntity(Void.class))
 				.block(Duration.ofSeconds(30));
@@ -288,7 +292,7 @@ public abstract class AbstractReactiveWebServerFactoryTests {
 	}
 
 	@Test
-	void compressionOfResponseToPostRequest() {
+	protected void compressionOfResponseToPostRequest() {
 		WebClient client = prepareCompressionTest();
 		ResponseEntity<Void> response = client.post().exchange().flatMap((res) -> res.toEntity(Void.class))
 				.block(Duration.ofSeconds(30));

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/web/servlet/server/AbstractServletWebServerFactoryTests.java

@@ -95,6 +95,7 @@ import org.apache.http.ssl.SSLContextBuilder;
 import org.apache.http.ssl.TrustStrategy;
 import org.apache.jasper.EmbeddedServletOptions;
 import org.apache.jasper.servlet.JspServlet;
+import org.assertj.core.api.ThrowableAssert.ThrowingCallable;
 import org.junit.jupiter.api.AfterEach;
 import org.junit.jupiter.api.Assumptions;
 import org.junit.jupiter.api.Test;
@@ -469,8 +470,12 @@ public abstract class AbstractServletWebServerFactoryTests {
 		factory.setSsl(ssl);
 		ServletRegistrationBean<ExampleServlet> registration = new ServletRegistrationBean<>(
 				new ExampleServlet(true, false), "/hello");
-		assertThatThrownBy(() -> factory.getWebServer(registration).start())
-				.hasStackTraceContaining("Keystore does not contain specified alias 'test-alias-404'");
+		ThrowingCallable call = () -> factory.getWebServer(registration).start();
+		assertThatSslWithInvalidAliasCallFails(call);
+	}
+
+	protected void assertThatSslWithInvalidAliasCallFails(ThrowingCallable call) {
+		assertThatThrownBy(call).hasStackTraceContaining("Keystore does not contain specified alias 'test-alias-404'");
 	}
 
 	@Test