fdo#76032: Write test for this.

Change-Id: Iec8d32a4e53d2d5d3cdc9767c2ede7654fe2bdd6
fdo#76032: This row index is 1-based whereas our own mnRow is 0-based.

Change-Id: I098d300532bef164bef0d40ebf62a6848bc19cb8