Merge branch '3.3.x' into 3.4.x

Closes gh-45399

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

@@ -147,7 +147,7 @@ class Log4J2LoggingSystemTests extends AbstractLoggingSystemTests {
 		Configuration configuration = this.loggingSystem.getConfiguration();
 		assertThat(output).contains("Hello world").doesNotContain("Hidden");
 		assertThat(new File(tmpDir() + "/spring.log")).exists();
-		assertThat(configuration.getConfigurationSource().getFile()).isNotNull();
+		assertThat(configuration.getConfigurationSource().getLocation()).contains("/log4j2-file.xml");
 	}
 
 	@Test

spring-boot-project/spring-boot/src/test/java/org/springframework/boot/logging/log4j2/TestLog4J2LoggingSystem.java

@@ -21,6 +21,7 @@ import java.util.Collections;
 import java.util.List;
 
 import org.apache.logging.log4j.LogManager;
+import org.apache.logging.log4j.core.LoggerContext;
 import org.apache.logging.log4j.core.config.Configuration;
 
 class TestLog4J2LoggingSystem extends Log4J2LoggingSystem {
@@ -34,7 +35,11 @@ class TestLog4J2LoggingSystem extends Log4J2LoggingSystem {
 	}
 
 	Configuration getConfiguration() {
-		return ((org.apache.logging.log4j.core.LoggerContext) LogManager.getContext(false)).getConfiguration();
+		return getLoggerContext().getConfiguration();
+	}
+
+	private LoggerContext getLoggerContext() {
+		return (LoggerContext) LogManager.getContext(false);
 	}
 
 	@Override