added testcase as documentation described

src/main/java/uk/org/lidalia/Slf4jUser.java

@@ -0,0 +1,15 @@
+package uk.org.lidalia;
+
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
+/**
+ * Created on 25-6-2019.
+ */
+public class Slf4jUser {
+	private static final Logger logger = LoggerFactory.getLogger(Slf4jUser.class);
+
+	public void aMethodThatLogs() {
+		logger.info("Hello World!");
+	}
+}

src/test/java/uk/org/lidalia/Slf4jUserTest.java

@@ -0,0 +1,33 @@
+package uk.org.lidalia;
+
+import org.junit.After;
+import org.junit.Test;
+import uk.org.lidalia.slf4jtest.TestLogger;
+import uk.org.lidalia.slf4jtest.TestLoggerFactory;
+
+import java.util.Collections;
+
+import static java.util.Arrays.asList;
+import static org.hamcrest.CoreMatchers.is;
+import static org.junit.Assert.*;
+import static uk.org.lidalia.slf4jtest.LoggingEvent.info;
+
+/**
+ * Created on 25-6-2019.
+ */
+public class Slf4jUserTest {
+	Slf4jUser slf4jUser = new Slf4jUser();
+	TestLogger logger = TestLoggerFactory.getTestLogger(Slf4jUser.class);
+
+	@Test
+	public void aMethodThatLogsLogsAsExpected() {
+		slf4jUser.aMethodThatLogs();
+
+		assertThat(logger.getLoggingEvents(), is(Collections.singletonList(info("Hello World!"))));
+	}
+
+	@After
+	public void clearLoggers() {
+		TestLoggerFactory.clear();
+	}
+}