How many tests were implemented and launched in your previous project?

The number of implemented and launched tests depends on the project and its requirements. In my previous project, there were about 150 unit tests covering the main business logic, and around 30 integration tests to verify component interactions.

For example, in Python using pytest, the tests looked like this:

import pytest

def add(a, b):
    return a + b


def test_add():
    assert add(2, 3) == 5

It's important not only to the quantity of tests but also their quality — how well they cover critical parts of the code and help detect errors early.