# THIS FILE IS PART OF THE CYLC WORKFLOW ENGINE.
# Copyright (C) NIWA & British Crown (Met Office) & Contributors.
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <http://www.gnu.org/licenses/>.

from subprocess import Popen, PIPE

from cylc.flow.pipe_poller import pipe_poller


def test_pipe_poller_str():
    proc = Popen(['echo', 'Hello World!'], stdout=PIPE, text=True)
    (stdout,) = pipe_poller(proc, proc.stdout)
    assert proc.returncode == 0
    assert stdout == 'Hello World!\n'


def test_pipe_poller_bytes():
    proc = Popen(['echo', 'Hello World!'], stdout=PIPE, text=False)
    (stdout,) = pipe_poller(proc, proc.stdout)
    assert proc.returncode == 0
    assert stdout == b'Hello World!\n'
