TestThreadSafeAppender.java

public class TestThreadSafeAppender {
	@BeforeEach
	public void clearLoggingStatements() {
		ThreadSafeAppender.clearEvents();
	}

	@Test
	public void testAssertingLoggingStatementsA() {
		LogProducingService service = new LogProducingService();
		service.writeSomeLoggingStatements("A");
		assertThat(ThreadSafeAppender.getEvents()).extracting("message").containsOnly("Let's assert some logs! A");
	}

	@Test
	public void testAssertingLoggingStatementsB() {
		LogProducingService service = new LogProducingService();
		service.writeSomeLoggingStatements("B");
		assertThat(ThreadSafeAppender.getEvents()).extracting("message").containsOnly("Let's assert some logs! B");
	}
}