fix: Test failures

Signed-off-by: Piotr P. Karwasz <[email protected]>

Author: ppkarwasz

core/spring-boot/src/main/java/org/springframework/boot/logging/log4j2/Log4J2LoggingSystem.java

@@ -185,7 +185,7 @@ private boolean isLog4jLogManagerInstalled() {
 	}
 
 	private boolean isLog4jBridgeHandlerAvailable() {
-		return isClassAvailable(Log4J2RuntimeHints.LOG4J_BRIDGE_HANDLER);
+		return ClassUtils.isPresent(Log4J2RuntimeHints.LOG4J_BRIDGE_HANDLER, getClassLoader());
 	}
 
 	private void removeLog4jBridgeHandler() {

core/spring-boot/src/test/java/org/springframework/boot/logging/log4j2/Log4J2LoggingSystemTests.java

@@ -309,15 +309,15 @@ void configLocationsWithJacksonDatabind() {
 
 	@Test
 	void configLocationsWithJacksonDataformatYaml() {
-		this.loggingSystem.availableClasses("com.fasterxml.jackson.dataformat.yaml.YAMLParser");
+		this.loggingSystem.availableClasses("com.fasterxml.jackson.dataformat.yaml.YAMLMapper");
 		assertThat(this.loggingSystem.getStandardConfigLocations()).containsExactly("log4j2-test.properties",
 				"log4j2-test.yaml", "log4j2-test.yml", "log4j2-test.xml", "log4j2.properties", "log4j2.yaml",
 				"log4j2.yml", "log4j2.xml");
 	}
 
 	@Test
 	void configLocationsWithJacksonDatabindAndDataformatYaml() {
-		this.loggingSystem.availableClasses("com.fasterxml.jackson.dataformat.yaml.YAMLParser",
+		this.loggingSystem.availableClasses("com.fasterxml.jackson.dataformat.yaml.YAMLMapper",
 				ObjectMapper.class.getName());
 		assertThat(this.loggingSystem.getStandardConfigLocations()).containsExactly("log4j2-test.properties",
 				"log4j2-test.yaml", "log4j2-test.yml", "log4j2-test.json", "log4j2-test.jsn", "log4j2-test.xml",