I appreciate your effort but this is my confusion: The script works correctly at the command line and does not issue any warnings, despite use of the strict and warnings pragmas enabled. It is only when I try to run it using automated test tools do those warnings arise.

Example: If I simply call reduce with 1 argument at the command line, it will be pushed onto the @answer array and returned.

This tells me that the instantiation errors are in the way the test code interfaces with the code under test. I don't understand why the arguments aren't being passed to the appropriate subroutine.

If I attempt to pass a list of scalar arguments in the test code, I get syntax errors when I run: 

perl -c test_file.t

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Also:

  • 1. What should I be doing in the return statements of this particular subroutine so they are easier to test?
  • 2. Should I be testing the subroutine individually, or indirectly accessing the sub through a call to main, as it appears to be done in the Perl Testing: A Developer's Notebook example?

    • In reply to Re^4: How to write testable command line script? by thechartist
    in thread How to write testable command line script? by thechartist

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