# Chapter 8 pytest
# filename must start with "test"
# pip install pytest
# pypi.org

# change to working directory
# ps> pytest testFileName.py --resultlog=FileName.txt
# ps> pytest test_chapter8_pytest.py --resultlog=testresults.txt

import pytest  # pip install pytest

def add(x,y):
    return x + y

def test_addition():
    result = add(2,"3") # Type Error fail int + str
    assert result == 5 

def test_subtract():
    result = 5 - 4
    assert result == 1 # pass

def test_multi():
    result = 2 * "3"
    assert result == 6 # Assertion Error fail result 33 == 6

def test_div():
    result = 20 / 2
    assert result == 10 # pass