Restore some tests for histogram fitting
Restore some tests for histogram fitting

zzxuanyuan/root-compressor-dummy,zzxuanyuan/root-compressor-dummy,zzxuanyuan/root-compressor-dummy,zzxuanyuan/root-compressor-dummy,zzxuanyuan/root-compressor-dummy,zzxuanyuan/root-compressor-dummy,zzxuanyuan/root-compressor-dummy,zzxuanyuan/root-compressor-dummy,zzxuanyuan/root-compressor-dummy,zzxuanyuan/root-compressor-dummy,zzxuanyuan/root-compressor-dummy