#!/usr/bin/python3
# -*- coding: utf-8 -*-
"""
Basic assertions are the simplest form of testing.
They are native python, and are easily debuggable.
"""

from typing import List


# %% testing with mere standard assert
def sum_arr(x: List[float]) -> float:
    """
    simple sum.
    If you want to debug these with a debugger,
    you can set a breakpoint within the function you want to test,
    or just step into the function in main.
    """
    return sum(x)


# These tests will crash if your program is not right
# One of these is wrong; which one?
# Put your tests in their own main (or their own file),
# and run it occasionally, or automatically in gitlab-CI.
if __name__ == "__main__":
    assert sum_arr([1, 2, 3]) == 6, "Should be 6"
    assert sum_arr([-1, -2, -2]) == -5, "Should be -5"
    # This test is wrong (the function is good):
    assert sum_arr([1, 2, 2]) == 6, "Should be 5"