if function numval(distance-km) not equal 7703
string "Incorrect distance in kilometers returned - "
distance-km delimited by size
x"0" delimited by size
into errormessage
end-string
call MFU-ASSERT-FAIL-Z using errormessage
end-if
(Run All).
The failed test is rerun, and now passes.
You can incorporate code coverage into your test runs, which shows the range of execution of your source during the test run.