add test cases and run the program with more parameters

This helps better detect potential issues. such as address access errors,
command execution errors, and whether the command runs as expected, etc.

Author: prownd

tests/run

@@ -22,10 +22,11 @@ t() {
         fi
 }
 
-echo 1..3
+echo 1..4
 t ./systemd-bootchart -o "$d" -n 2 -r
 t ./systemd-bootchart -o "$d" -n 10 -r
 t ./systemd-bootchart -o "$d" -n 10 -r -p
+t ./systemd-bootchart -o "$d" -F -f 10 -n 10 -p -e --per-cpu
 
 if [ $test_failures -ne 0 ]; then
         echo "# Failed $test_failures out of $test_runs tests"