Mock a batch file OPEN and provide a fake STATUS CODE

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       TESTSUITE 'Batch program handles file not found condition correctly' 

       TESTCASE 'Verify processing when input file is not found' 
           MOCK INPUT-FILE
               ON OPEN
                   MOVE STATUS-FILE-NOT-FOUND TO FILE-STATUS
           END-MOCK
           PERFORM PARAGRAPH-UNDER-TEST
           EXPECT WS-ERROR-MESSAGE TO BE 'FILE INPUT-FILE NOT FOUND'