Unit test for string input with custom string handling policy.
Unit test for string input with custom string handling policy.

Change-Id: I51e8fbe83e94ba66a0e2ef63aacf080ba0e50a9c

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