Basic-Calculator

Programming language: Python v3.10

• README.md: For the documentation
• requirements.py: The project dependencies.
  • pytest: This framework makes it easy to write small, readable tests, and can scale to support complex functional testing for applications and libraries.
• app.py: The source code our calculator app
• test.py: Contains the tests cases

Next Steps

Clone the project locally, implement the features and commit to GitHub, observe the CI results

The add method

Implementation

In app.py

class Calculator:
    def __init__(self):
        pass

    def add(self, num1, num2):
        return num1 + num2

In test.py

import pytest
from app import Calculator

# Fixture to create an instance of the Calculator class
@pytest.fixture
def calculator():
    return Calculator()

# Test case for the add method
def test_add(calculator):
    assert calculator.add(2, 3) == 5
    assert calculator.add(-1, 1) == 0
    assert calculator.add(0, 0) == 0
    assert calculator.add(-5, -7) == -12

Commit and Push

git add app.py test.py
git commit -m 'Done with the add function'
git push

The div method

Implementation

In app.py

Add the method div to the class Calculator

We will intentionally simulate a bug by omitting the error handling for division by zero.

def div(self, num1, num2):
  return num1 / num2

In test.py

# Test case for the div method
def test_div(calculator):
    assert calculator.div(4, 2) == 2
    assert calculator.div(-1, 1) == -1
    assert calculator.div(0, 5) == 0

# Test case for division by zero
def test_div_by_zero(calculator):
    with pytest.raises(ValueError):
        calculator.div(10, 0)

Commit and Push

git add app.py test.py
git commit -m 'Done with the div function'
git push