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import subprocess
import pytest
import graphviz
@pytest.mark.usefixtures('unknown_platform')
def test_view_unknown_platform():
with pytest.raises(RuntimeError, match=r'platform'):
graphviz.view('nonfilepath')
def test_view_mocked(mocker, mock_platform, mock_popen, mock_startfile, quiet):
assert graphviz.view('nonfilepath', quiet=quiet) is None
if mock_platform == 'windows':
mock_startfile.assert_called_once_with('nonfilepath')
return
if quiet:
kwargs = {'stderr': subprocess.DEVNULL}
else:
kwargs = {}
if mock_platform == 'darwin':
mock_popen.assert_called_once_with(['open', 'nonfilepath'], **kwargs)
elif mock_platform in ('linux', 'freebsd'):
mock_popen.assert_called_once_with(['xdg-open', 'nonfilepath'], **kwargs)
else:
raise RuntimeError
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