"sha000:c0b0e000f0f00fc0000da0def00000f00000a00d00000e0000d0b0f0c0c0000b"   dgst, err = cc0.Checksum(context.TODO(), ref, "abc/foo", false)  require.NoError(t, err)  require.Equal(t, data0Expected, string(dgst))   dgst, err = cc0.Checksum(context.TODO(), ref, "ln", false)  require.NoError(t, err)  require.Equal(t, data0Expected, string(dgst))   dgst, err = cc0.Checksum(context.TODO(), ref, "ln0", false)  require.NoError(t, err)  require.Equal(t, dgstFileData0, dgst) }  func TestChecksum