gistfile1.txt

√ adds a contact successfully with valid data
    √ does not add contact when name is missing
    √ does not add contact with duplicate phone number
    √ finds a contact by phone number
    √ returns null when searching for non-existent phone
    √ updates an existing contact
    √ returns false when updating a non-existent contact
    √ deletes an existing contact
    √ returns false when deleting non-existent contact
    √ searches contacts by keyword across name, phone, and email

sample_test.py

import importlib
import address_book
import pytest

@pytest.fixture(autouse=True)
def reset_address_book():
    # Reload module before every test to reset globals
    importlib.reload(address_book)

def test_add_contact_successfully():
    result = address_book.add_contact(
        "John Doe",
        "0700000001",
        "john@email.com",
        "Kampala"
    )

    assert result is True
    contacts = address_book.get_all_contacts()
    assert len(contacts) == 1
    assert contacts[0]["name"] == "John Doe"
    
if __name__ == "__main__":
    add_contact("John Doe", "0700000001", "john@email.com", "Kampala")
    add_contact("Jane Smith", "0700000002", "", "")
    update_contact("0700000001", "John D.", None, "Ntinda")

    print(get_all_contacts())

smapleTest.js

describe('Legacy Address Book – Characterization Tests', () => {

    beforeEach(() => {
        // Reset module state before every test
        jest.resetModules();
    });

    test('adds a contact successfully with valid data', () => {
        const book = require('./addressbook');

        const result = book.addContact(
            'John Doe',
            '0700000001',
            'john@email.com',
            'Kampala'
        );

        expect(result).toBe(true);

        const contacts = book.getAllContacts();
        expect(contacts.length).toBe(1);
        expect(contacts[0].name).toBe('John Doe');
        expect(contacts[0].phone).toBe('0700000001');
    });
})

if (require.main === module) {
    addContact('John Doe', '0700000001', 'john@email.com', 'Kampala');
    addContact("Jane Smith", "0700000002", "", "");
    updateContact("0700000001", "John D.", null, "Ntinda");

    console.log(getAllContacts());
    console.log(findContactByPhone("0700000002"));
    console.log(searchContacts("John"));
}