def test_get_running_pid_not_integer(tmpdir):
"""Assert function returns None when the content is not an Integer"""
pid_file = tmpdir.join('sopel.pid')
pid_file.write('')
result = get_running_pid(pid_file.strpath)
assert result is None
pid_file.write('abcdefg')
result = get_running_pid(pid_file.strpath)
assert result is None
def test_get_running_pid(tmpdir):
"""Assert function retrieves an integer from a given filename"""
pid_file = tmpdir.join('sopel.pid')
pid_file.write('7814')
result = get_running_pid(pid_file.strpath)
assert result == 7814
def test_get_running_pid_no_file(tmpdir):
"""Assert function returns None when there is no such file"""
pid_file = tmpdir.join('sopel.pid')
result = get_running_pid(pid_file.strpath)
assert result is None