Add sanity-check assertion
Add sanity-check assertion

Change-Id: I119f008734e4978d6bcf5f786ae3604db5c0f8a9

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core