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import io

import pytest

import progressbar

@pytest.mark.parametrize('value,expected', [

(None, None),

('', None),

('1', True),

('y', True),

('t', True),

('yes', True),

('true', True),

('0', False),

('n', False),

('f', False),

('no', False),

('false', False),

])

def test_env_flag(value, expected, monkeypatch):

if value is not None:

monkeypatch.setenv('TEST_ENV', value)

assert progressbar.utils.env_flag('TEST_ENV') == expected

if value:

monkeypatch.setenv('TEST_ENV', value.upper())

assert progressbar.utils.env_flag('TEST_ENV') == expected

monkeypatch.undo()

def test_is_terminal(monkeypatch):

fd = io.StringIO()

monkeypatch.delenv('PROGRESSBAR_IS_TERMINAL', raising=False)

monkeypatch.delenv('JPY_PARENT_PID', raising=False)

assert progressbar.utils.is_terminal(fd) is False

assert progressbar.utils.is_terminal(fd, True) is True

assert progressbar.utils.is_terminal(fd, False) is False

monkeypatch.setenv('JPY_PARENT_PID', '123')

assert progressbar.utils.is_terminal(fd) is True

monkeypatch.delenv('JPY_PARENT_PID')

# Sanity check

assert progressbar.utils.is_terminal(fd) is False

monkeypatch.setenv('PROGRESSBAR_IS_TERMINAL', 'true')

assert progressbar.utils.is_terminal(fd) is True

monkeypatch.setenv('PROGRESSBAR_IS_TERMINAL', 'false')

assert progressbar.utils.is_terminal(fd) is False

monkeypatch.delenv('PROGRESSBAR_IS_TERMINAL')

# Sanity check

assert progressbar.utils.is_terminal(fd) is False