Test suite: Add tests for undefined page range limits

Originally pdftopdf from cups-filters doesn't support page range with
undefined upper limit (f.e. '5-'), but I found out these page ranges
aren't checked in CUPS test suite neither.

It would be great if we could cover the use case in test suite to
prevent possible regressions in the future.

CHANGES.md

@@ -78,6 +78,7 @@ CUPS v2.4-b1 (Pending)
   `ListenBackLog`, `LPDConfigFile`, `KeepAliveTimeout`, `RIPCache`, and
   `SMBConfigFile` directives in `cupsd.conf` and `cups-files.conf`.
 - Stubbed out deprecated `httpMD5` functions.
+- Add test for undefined page ranges during printing.
 
 
 CUPS v2.3.3op2 (February 1, 2021)

test/5.5-lp.sh

@@ -45,6 +45,30 @@ else
 fi
 echo ""
 
+echo "LP Page ranges Test - undefined low page limit"
+echo ""
+echo "    lp -d Test1 -P -5 testfile.pdf"
+$runcups $VALGRIND ../systemv/lp -d Test1 -P -5 ../examples/testfile.pdf 2>&1
+if test $? != 0; then
+	echo "    FAILED"
+	exit 1
+else
+	echo "    PASSED"
+fi
+echo ""
+
+echo "LP Page ranges Test - undefined upper page limit"
+echo ""
+echo "    lp -d Test1 -P 5- -o job-sheets=classified,classified testfile.pdf"
+$runcups $VALGRIND ../systemv/lp -d Test1 -P 5- ../examples/testfile.pdf 2>&1
+if test $? != 0; then
+	echo "    FAILED"
+	exit 1
+else
+	echo "    PASSED"
+fi
+echo ""
+
 echo "LP Flood Test ($1 times in parallel)"
 echo ""
 echo "    lp -d Test1 testfile.jpg"

test/run-stp-tests.sh

@@ -999,7 +999,10 @@ fi
 
 # Pages printed on Test1 (within 1 page for timing-dependent cancel issues)
 count=`$GREP '^Test1 ' $BASE/log/page_log | awk 'BEGIN{count=0}{count=count+$7}END{print count}'`
-expected=`expr $pjobs \* 2 + 34`
+# expected numbers of pages from page ranges tests:
+# - 5 pages for the job with a lower limit undefined (-5)
+# - 4 pages for the job with a upper limit undefined (5-)
+expected=`expr $pjobs \* 2 + 34 + 5 + 4`
 expected2=`expr $expected + 2`
 if test $count -lt $expected -a $count -gt $expected2; then
 	echo "FAIL: Printer 'Test1' produced $count page(s), expected $expected."
@@ -1040,9 +1043,13 @@ fi
 # - 1 request for setting cupsSNMP/IPPSupplies to False - CUPS-Add-Modify-Printer
 # - 1 request for deleting the queue - CUPS-Delete-Printer
 
+# Number of requests related to undefined page range limits - total 4 in 'expected'
+# 2 requests (Create-Job, Send-Document) * number of jobs (2 - one for undefined
+# low limit, one for undefined upper limit)
+
 # Requests logged
 count=`wc -l $BASE/log/access_log | awk '{print $1}'`
-expected=`expr 35 + 18 + 30 + $pjobs \* 8 + $pprinters \* $pjobs \* 4 + 2 + 2 + 5`
+expected=`expr 35 + 18 + 30 + $pjobs \* 8 + $pprinters \* $pjobs \* 4 + 2 + 2 + 5 + 4`
 if test $count != $expected; then
 	echo "FAIL: $count requests logged, expected $expected."
 	echo "    <p>FAIL: $count requests logged, expected $expected.</p>" >>$strfile