Function test_lazy_function_executed_only_once

tests/test_opt.py:156–169

(writer)

def test_lazy_function_executed_only_once(writer):
    counter = 0

    def laziness():
        nonlocal counter
        counter += 1
        return counter

    logger.add(writer, level=10, format="{level.name} => {message}")

    logger.opt(lazy=True).info("1: {lazy} {lazy}", lazy=laziness)
    logger.opt(lazy=True).info("2: {0} {0}", laziness)

    assert writer.read() == "INFO => 1: 1 1\nINFO => 2: 2 2\n"


def test_logging_within_lazy_function(writer):