Kattis Demos with Unit Testing

Demo solutions with unit testing for some problems from https://open.kattis.com

Requirements

• Linux/Mac/WSL (Windows Subsystem Layer) bash terminal is preferred along with language specific tools (compiler/interpreter, etc.) properly installed

• On Windows g++ compiler is required to compile and run C and C++ code from command prompt

  • g++ compiler for Windows can be downloaded from https://nuwen.net/mingw.html; extract it into C:\ drive as shown in the instructions here: https://nuwen.net/mingw.html#install

• pytest Python3 package for testing Python3 solutions

pip3 install -U pytest
pip3 install -U mypy

Programming Languages

• demos are provided in the following several languages
• follow the instruction based on your language and operating system

C++

• open a terminal on Mac/Linux/WSL or cmd prompt on Windows
• change working directory to a problem folder, e.g.

  cd cold/C++

• compile using g++ or use provided Makefile

  g++ -std=c++14 cold.cpp
  make

• run unit testing; user provided test cases
• on Mac/Linux, either run the program with test argument or use the provided Makefile

  ./a.out test
  make unit_test

• on Windows:

  a.exe test

• run kattis provided sample test cases e.g. if 1.in and 1.ans are sample test files:
• on Mac/Linux/WSL Terminal

  cat 1.in | ./a.out | diff - 1.ans
  make kattis_test

• on Windows cmd prompt:

  > type 1.in | a.exe > out1.txt
  > FC out1.txt 1.ans

Python3

• open a terminal on Mac/Linux/WSL or cmd prompt on Windows
• change working directory to a problem folder, e.g.,

  cd cold/python3

• run unit tests; user provided test cases
• several different ways...

  python3 cold.py test
  python3 test_cold.py
  python3 test_unit_cold.py
  pytest # make sure pytest is installed
  python3 -m unittest

Testing Python OOP solutions

• open terminal
• change current working directory to OOP folder inside problem/python3 folder
• run the following commands

  mypy --strict <module>.py
  mypy --strict test_<module>.py
  pytest
  python3 -m unittest
  python3 test_<module>.py

• run kattis provided sample test cases e.g. if 1.in and 1.ans are sample test files

  cat 1.in | python3 cold.py | diff - 1.ans

• on Windows cmd prompt

  type 1.in | python3 cold.py > out1.txt
  FC out1.txt 1.ans

NodeJS

• open a terminal on Mac/Linux/WSL or cmd prompt on Windows
• change working directory to a problem folder
• run unit testing with your own test cases
• uses Jest Unit Testing Framework
• run the following commands on a Terminal

  cd cold
  npm install
  npm run jest
  npm run kattis_test

• run kattis provided sample test cases e.g. if 1.in and 1.ans are sample test files
• on Mac/Linux Terminal

  cat 1.in | node cold.js | diff - 1.ans

• on Windows cmd prompt:

  type 1.in | node cold.js > out1.txt
  FC out1.txt 1.ans

C

• open a terminal on Mac/Linux/WSL or cmd prompt on Windows
• change working directory to a problem folder, e.g.

  cd cold

• compile using gcc

  gcc cold.c

• run unit testing; user provided test cases
• write and use a Makefile as demonstrated in C++ section

  ./a.out test

• run kattis provided sample test cases e.g. if 1.in and 1.ans are sample test files
• on Mac/Linux Terminal:

  cat 1.in | ./a.out | diff - 1.ans

• on Windows cmd prompt

  type 1.in | a.out > out1.txt
  FC out1.txt 1.ans

Java

• See each problem folder