Refactor use case and test case in decorators.py

[maryjess]

• Setup test files for decorators

tests/test_decorators.py 👉🏻👉🏻 pytest is used here!

# test_decorators.py
import pytest
from decorators import get_input

def test_valid_input(monkeypatch):
    monkeypatch.setattr('builtins.input', lambda _: "25")
    assert get_input("Enter your age: ") == "25"

def test_invalid_input(monkeypatch):
    monkeypatch.setattr('builtins.input', lambda _: "abc")
    with pytest.raises(ValueError):
        get_input("Enter your age: ")

• tests/test_decorators.py has the unit tests using pytest with monkeypatch to mock the input() function.