"""Solution 17.3.5 — Approximate division

Chapter 17: Testing — Everyday Programming

Bug type: Logical

Setting abs=0 gives pytest.approx zero tolerance, so 0.3333… never
matches 0.3333 and the test fails. Using a small tolerance (or the
default) lets the approximate comparison succeed.

Exercise: ex_17_3_5.py
"""

import pytest

def divide(a, b):
    return a / b

def test_divide():
    assert divide(1, 3) == pytest.approx(0.3333, abs=1e-4)