$ ./pymacro -h
usage: pymacro [-h] [-m MACROS_FILE] [-i INPUT] [-o OUTPUT]

optional arguments:
  -h, --help            show this help message and exit
  -m MACROS_FILE, --macros-file MACROS_FILE
                        File where macros are stored (default: macros)
  -i INPUT, --input INPUT
                        File to be processed. (default: -)
  -o OUTPUT, --output OUTPUT
                        Path of output (default: -)

testing

Run test.sh. A diff is run on the actual output against what should have come out according to the spec. There should be no output if everything is working as expected.