The solution is based on monkeypatch fixture.
In this example myprog reads number from the file myprog_input.txt adds 2 to it and stores result in myprog_output.txt
uname -vosri
Linux 4.4.0-19041-Microsoft #1237-Microsoft Sat Sep 11 14:32:00 PST 2021 x86_64 GNU/Linux
lsb_release -a
No LSB modules are available.
Distributor ID: Ubuntu
Description: Ubuntu 20.04.3 LTS
Release: 20.04
Codename: focal
python3.11 --version
Python 3.11.7
| https://opensource.org/licenses/MIT | |
| Copyright 2021 Dmitry Messerman | |
| Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files | |
| (the "Software"), to deal in the Software without restriction, including without limitation the rights to use, copy, modify, merge, | |
| publish, distribute, sublicense, and/or sell copies of the Software, and to permit persons to whom the Software is furnished to do so, | |
| subject to the following conditions: | |
| The above copyright notice and this permission notice shall be included in all copies or substantial portions of the Software. | |
| THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, | |
| INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, | |
| FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. | |
| IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, | |
| WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, | |
| OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. |
| #!/usr/bin/python3.11 | |
| import argparse | |
| import hashlib | |
| def main(): | |
| parser = argparse.ArgumentParser(description='myprog') | |
| parser.add_argument('-i') | |
| parser.add_argument('-o') | |
| args = parser.parse_args() | |
| with open(args.i) as f: | |
| input_data=int(f.read()) | |
| output_data=input_data+2 | |
| f.close() | |
| with open(args.o,"w") as fo: | |
| fo.write(str(output_data) + '\n') | |
| fo.close() | |
| with open(args.o) as fot: | |
| bytes = fot.read().encode() # read entire file as bytes | |
| fot.close() | |
| readable_hash = hashlib.sha256(bytes).hexdigest(); | |
| return readable_hash | |
| if __name__ == '__main__': | |
| print(main()) |
| 3 |
| 5 |
| myprog.py -i myprog_input.txt -o myprog_output.txt | |
| f0b5c2c2211c8d67ed15e75e656c7862d086e9245420892a7de62cd9ec582a06 |
| #!/usr/bin/tcsh -f | |
| set script_realpath=`realpath $0` | |
| set script_path=$script_realpath:h | |
| \rm -f myprog_output.txt >& /dev/null | |
| set hash_cmd="${script_path}/myprog.py -i ${script_path}/myprog_input.txt -o myprog_output.txt" | |
| if(1 == `uname | grep ^MINGW | wc -l`) then | |
| set hash_val=`python3.10 $hash_cmd` | |
| unix2dos myprog_output.txt | |
| else | |
| set hash_val=`$hash_cmd` | |
| endif | |
| diff myprog_output.txt ${script_path}/myprog_output_expected.txt | |
| grep -w $hash_val ${script_path}/test_myprog.py | |
| pytest ${script_path}/test_myprog.py |
| assert myprog.main() == 'f0b5c2c2211c8d67ed15e75e656c7862d086e9245420892a7de62cd9ec582a06' | |
| ============================= test session starts ============================== | |
| platform linux -- Python 3.11.1, pytest-7.2.0, pluggy-1.0.0 | |
| rootdir: /home/mdmitry/github/gist/pytest_program | |
| collected 1 item | |
| test_myprog.py . [100%] | |
| ============================== 1 passed in 0.04s =============================== |
| #!/usr/bin/python3.11 | |
| import sys | |
| import myprog | |
| def test_myprog(monkeypatch): | |
| with monkeypatch.context() as m: | |
| m.setattr(sys, 'argv', ['myprog', '-i', 'myprog_input.txt', '-o', 'myprog_output.txt']) | |
| assert myprog.main() == 'f0b5c2c2211c8d67ed15e75e656c7862d086e9245420892a7de62cd9ec582a06' |