def test_LessThanDay():
assert less_than_day(32) == "32 seconds ago"
assert less_than_day(100) == "a minute ago"
assert less_than_day(2645) == "44 minutes ago"
assert less_than_day(5200) == "an hour ago"
assert less_than_day(68500) == "19 hours ago"
assert less_than_day(86401) == None
def test_seconds_friendly_message():
assert (less_than_day(15) == "15 seconds ago")
def test_more_hours_friendly_message():
assert (less_than_day(82800) == "23 hours ago")
def test_hours_friendly_message():
assert (less_than_day(7300) == "2 hours ago")
def test_hour_friendly_message():
assert (less_than_day(7000) == "an hour ago")
def test_minutes_friendly_message():
assert (less_than_day(300) == "5 minutes ago")
def tests_minuteminutes_friendly_message():
assert (less_than_day(120) == "2 minutes ago")
def test_minute_friendly_message():
assert (less_than_day(100) == "a minute ago")
def test_secondsminute_friendly_message():
assert (less_than_day(60) == "a minute ago")