8.3 טסטים פתרון

# calculator.py
class Calculator:
    def add(self, x, y):
        return x + y

    def subtract(self, x, y):
        return x - y

    def multiply(self, x, y):
        return x * y

    def divide(self, x, y):
        if y == 0:
            raise ValueError("Cannot divide by zero!")
        return x / y

# test_calculator.py
import pytest
from calculator import Calculator

@pytest.fixture
def calculator():
    return Calculator()

def test_add(calculator):
    assert calculator.add(1, 2) == 3
    assert calculator.add(-1, 1) == 0
    assert calculator.add(0, 0) == 0

def test_subtract(calculator):
    assert calculator.subtract(5, 2) == 3
    assert calculator.subtract(1, -1) == 2
    assert calculator.subtract(0, 0) == 0

def test_multiply(calculator):
    assert calculator.multiply(2, 3) == 6
    assert calculator.multiply(-2, 3) == -6
    assert calculator.multiply(0, 5) == 0

def test_divide(calculator):
    assert calculator.divide(6, 2) == 3
    assert calculator.divide(5, 2) == 2.5
    with pytest.raises(ValueError):
        calculator.divide(1, 0)

python -m pytest