when(reader.getSequenceID()).thenReturn(seqId);
when(reader.getTotalUncompressedBytes()).thenReturn(Long.valueOf(sizeMb));
when(reader.length()).thenReturn(Long.valueOf(sizeMb));
when(mockSf.getPath()).thenReturn(path);
when(mockSf.excludeFromMinorCompaction()).thenReturn(false);
when(mockSf.isReference()).thenReturn(false); // TODO come back to
// this when selection takes this into account
when(mockSf.getReader()).thenReturn(reader);
String toString = Objects.toStringHelper("MockStoreFile")
.add("isReference", false)