LoggingSystemTests Class — spring-boot Architecture

Source Code

core/spring-boot/src/test/java/org/springframework/boot/logging/LoggingSystemTests.java lines 37–94

class LoggingSystemTests {

	@AfterEach
	void clearSystemProperty() {
		System.clearProperty(LoggingSystem.SYSTEM_PROPERTY);
	}

	@Test
	void logbackIsTheDefaultLoggingSystem() {
		assertThat(LoggingSystem.get(getClass().getClassLoader())).isInstanceOf(LogbackLoggingSystem.class);
	}

	@Test
	@ClassPathExclusions("logback-*.jar")
	void log4j2IsUsedInTheAbsenceOfLogback() {
		assertThat(LoggingSystem.get(getClass().getClassLoader())).isInstanceOf(Log4J2LoggingSystem.class);
	}

	@Test
	@ClassPathExclusions({ "logback-*.jar", "log4j-*.jar" })
	void julIsUsedInTheAbsenceOfLogbackAndLog4j2() {
		assertThat(LoggingSystem.get(getClass().getClassLoader())).isInstanceOf(JavaLoggingSystem.class);
	}

	@Test
	void loggingSystemCanBeDisabled() {
		System.setProperty(LoggingSystem.SYSTEM_PROPERTY, LoggingSystem.NONE);
		LoggingSystem loggingSystem = LoggingSystem.get(getClass().getClassLoader());
		assertThat(loggingSystem).isInstanceOf(NoOpLoggingSystem.class);
	}

	@Test
	void getLoggerConfigurationIsUnsupported() {
		assertThatExceptionOfType(UnsupportedOperationException.class)
			.isThrownBy(() -> new StubLoggingSystem().getLoggerConfiguration("test-logger-name"));
	}

	@Test
	void listLoggerConfigurationsIsUnsupported() {
		assertThatExceptionOfType(UnsupportedOperationException.class)
			.isThrownBy(() -> new StubLoggingSystem().getLoggerConfigurations());
	}

	private static final class StubLoggingSystem extends LoggingSystem {

		@Override
		public void beforeInitialize() {
			// Stub implementation
		}

		@Override
		public void setLogLevel(@Nullable String loggerName, @Nullable LogLevel level) {
			// Stub implementation
		}

	}

}