Check if the current time is in between two times.

check_time_between.py

"""
Example of checking wether the current time is between
a start and end time. This assumes no access to timespan like functions
and is why the times are integers.

Use nose to run tests with `nosetests check_time_between.py`
"""


def test_before_window():
    assert not is_in_window(1200, 1600, 1800)


def test_after_window():
    assert not is_in_window(2000, 1600, 1800)


def test_during_window():
    assert is_in_window(1700, 1600, 1800)


def test_during_window_crossover():
    assert is_in_window(1700, 1600, 100)


def test_hour_combinations():
    def check_is_in_window(start, end):
        assert is_in_window(start + 30, start, end)

    for start_hour in xrange(0, 23):
        for end_hour in xrange(0, 23):
            start = 0
            if not start_hour == 0:
                start *= 100
            end = 0
            if not end_hour == 0:
                end *= 100

            yield check_is_in_window, start, end


def is_in_window(now, start, end):
    """
    Return true if now is between start and end.

    Parameters should contain the current hour (24 hour clock) and minute as a
    single integer. For example: 1:30 AM would be 130, 3:30 PM would be 1530.
    """

    if start < end:
        return start <= now and now <= end
    else:
        return not (end < now and now < start)