MoveTracker { public boolean isEmpty() { return entries.isEmpty(); } MoveTracker(); void addMove(@NotNull String sourcePath, @NotNull String destPath); boolean isEmpty(); @Nullable String getSourcePath(String destPath); @Nullable String getDestPath(String sourcePath); boolean containsMove(@Nullable String path); void clear();  }
@Test public void testIsEmpty() { assertTrue(new MoveTracker().isEmpty()); }