"""Solution 17.3.1 — Sum of an empty list

Chapter 17: Testing — Everyday Programming

Bug type: Logical

The function correctly returns 0 for an empty list, but the test asserts
1, so the edge-case check fails. The fix corrects the expected value to
0.

Exercise: ex_17_3_1.py
"""

def total(numbers):
    running = 0
    for n in numbers:
        running += n
    return running

def test_total_empty():
    assert total([]) == 0