import java.util.Collections;
import java.util.Set;
+import static junit.framework.Assert.assertFalse;
+import static junit.framework.Assert.assertTrue;
import static org.hamcrest.CoreMatchers.is;
-import static org.junit.Assert.*;
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertThat;
public class FileStorageAdapterTest {