testeth/mocks.py

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#
# Copyright (c) 2020 The FreeBSD Foundation
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# This software1 was developed by John-Mark Gurney under sponsorship
# from the FreeBSD Foundation.
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from unittest.mock import AsyncMock, Mock

__all__ = [ 'wrap_subprocess_exec' ]

def wrap_subprocess_exec(mockobj, stdout=b'', stderr=b'', retcode=0):
	assert isinstance(stdout, bytes)
	assert isinstance(stderr, bytes)
	proc = Mock()
	proc.communicate = AsyncMock()
	proc.communicate.return_value = (stdout, stderr)
	proc.stdout.read = AsyncMock()
	proc.stdout.read.side_effect = [ stdout, b'' ]
	proc.stdin.drain = AsyncMock()
	proc.stdin.wait_closed = AsyncMock()
	proc.wait = AsyncMock()
	proc.wait.return_value = retcode
	proc.returncode = retcode
	mockobj.return_value = proc