Merge pull request #51959 from rvullriede

Closes gh-51959

* fix/logging-lifecycle-not-pauseable:
  Polish "Prevent pausing of the logging system"
  Prevent pausing of the logging system

core/spring-boot-test/build.gradle

@@ -61,6 +61,7 @@ dependencies {
 	testRuntimeOnly("org.aspectj:aspectjrt")
 	testRuntimeOnly("org.aspectj:aspectjweaver")
 	testRuntimeOnly("org.junit.vintage:junit-vintage-engine")
+	testRuntimeOnly("org.slf4j:jul-to-slf4j")
 }
 
 tasks.named("compileTestJava") {

core/spring-boot-test/src/test/java/org/springframework/boot/test/context/LoggingApplicationListenerWithContextPausingTests.java

@@ -0,0 +1,90 @@
+/*
+ * Copyright 2012-present 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 org.springframework.boot.test.context;
+
+import java.util.logging.Logger;
+
+import org.junit.jupiter.api.ClassOrderer;
+import org.junit.jupiter.api.Nested;
+import org.junit.jupiter.api.Test;
+import org.junit.jupiter.api.TestClassOrder;
+import org.junit.jupiter.api.extension.ExtendWith;
+
+import org.springframework.boot.context.logging.LoggingApplicationListener;
+import org.springframework.boot.test.context.LoggingApplicationListenerWithContextPausingTests.TestConfig;
+import org.springframework.boot.test.system.CapturedOutput;
+import org.springframework.boot.test.system.OutputCaptureExtension;
+import org.springframework.context.annotation.Configuration;
+import org.springframework.test.context.TestPropertySource;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+/**
+ * Tests for {@link LoggingApplicationListener} when the test context framework pauses a
+ * context while it's in the cache.
+ *
+ * @author Raphael Vullriede
+ */
+@SpringBootTest(classes = TestConfig.class)
+@ExtendWith(OutputCaptureExtension.class)
+@TestClassOrder(ClassOrderer.ClassName.class)
+class LoggingApplicationListenerWithContextPausingTests {
+
+	private static void assertJulOutputIsLogged(CapturedOutput output) {
+		Logger.getLogger("test").severe("Hello from JUL");
+		assertThat(output).contains("Hello from JUL");
+	}
+
+	@Nested
+	@TestPropertySource(properties = "context=one")
+	class ContextOne {
+
+		@Test
+		void test(CapturedOutput output) {
+			assertJulOutputIsLogged(output);
+		}
+
+	}
+
+	@Nested
+	@TestPropertySource(properties = "context=two")
+	class ContextTwo {
+
+		@Test
+		void test(CapturedOutput output) {
+			assertJulOutputIsLogged(output);
+		}
+
+	}
+
+	@Nested
+	@TestPropertySource(properties = "context=one")
+	class ReuseContextOne {
+
+		@Test
+		void test(CapturedOutput output) {
+			assertJulOutputIsLogged(output);
+		}
+
+	}
+
+	@Configuration(proxyBeanMethods = false)
+	static class TestConfig {
+
+	}
+
+}

core/spring-boot/src/main/java/org/springframework/boot/context/logging/LoggingApplicationListener.java

@@ -488,6 +488,11 @@ public class LoggingApplicationListener implements GenericApplicationListener {
 			return Integer.MIN_VALUE + 1;
 		}
 
+		@Override
+		public boolean isPauseable() {
+			return false;
+		}
+
 	}
 
 }