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# test_backend_devfile -- Test nxt.backend.devfile module
# Copyright (C) 2021 Nicolas Schodet
#
# 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.
from unittest.mock import Mock, call, patch
import pytest
import nxt.backend.devfile
@pytest.fixture
def mdev():
dev = Mock(
spec_set=(
"read",
"write",
"close",
)
)
return dev
@pytest.fixture
def mopen(mdev):
with patch("nxt.backend.devfile.open") as fopen:
fopen.return_value = mdev
yield fopen
@pytest.fixture
def mglob():
with patch("nxt.backend.devfile.glob") as glob:
yield glob
@pytest.fixture
def mtty():
with patch("nxt.backend.devfile.tty") as tty:
yield tty
@pytest.fixture
def mplatform():
with patch("nxt.backend.devfile.platform") as platform:
yield platform
def test_devfile(mopen, mtty, mdev):
# Instantiate backend.
backend = nxt.backend.devfile.get_backend()
# Find brick.
bricks = list(backend.find(filename="/dev/nxt", blah="blah"))
assert len(bricks) == 1
brick = bricks[0]
assert mopen.called
assert mtty.setraw.called
sock = brick._sock
# str.
assert str(sock).startswith("DevFile (/dev")
# Send.
some_bytes = bytes.fromhex("01020304")
some_len = bytes.fromhex("0400")
some_bytes_with_len = some_len + some_bytes
sock.send(some_bytes)
assert mdev.write.call_args == call(some_bytes_with_len)
# Recv.
mdev.read.side_effect = [some_len, some_bytes]
r = sock.recv()
assert r == some_bytes
assert mdev.read.called
# Close.
brick.close()
assert mdev.close.called
# Duplicated close.
sock.close()
def test_devfile_linux(mopen, mtty, mglob, mplatform):
mplatform.system.return_value = "Linux"
mglob.glob.return_value = ["/dev/rfcomm0"]
backend = nxt.backend.devfile.get_backend()
bricks = list(backend.find(blah="blah"))
assert len(bricks) == 1
assert mglob.mock_calls == [call.glob("/dev/rfcomm*")]
def test_devfile_darwin(mopen, mtty, mglob, mplatform):
mplatform.system.return_value = "Darwin"
mglob.glob.return_value = ["/dev/tty.NXT-DevB-1"]
backend = nxt.backend.devfile.get_backend()
bricks = list(backend.find(name="NXT", blah="blah"))
assert len(bricks) == 1
bricks = list(backend.find(blah="blah"))
assert len(bricks) == 1
assert mglob.mock_calls == [
call.glob("/dev/*NXT*"),
call.glob("/dev/*-DevB*"),
]
def test_devfile_other(mplatform):
mplatform.system.return_value = "MSDos"
backend = nxt.backend.devfile.get_backend()
bricks = list(backend.find(blah="blah"))
assert len(bricks) == 0
def test_devfile_cant_connect(mopen, mtty, mdev):
backend = nxt.backend.devfile.get_backend()
mopen.side_effect = [OSError]
bricks = list(backend.find(filename="/dev/nxt", blah="blah"))
assert len(bricks) == 0
@pytest.mark.nxt("devfile")
def test_devfile_real():
# Instantiate backend.
backend = nxt.backend.devfile.get_backend()
# Find brick.
bricks = list(backend.find())
assert len(bricks) > 0, "no NXT found"
brick = bricks[0]
sock = brick._sock
# str.
assert str(sock).startswith("DevFile (/dev")
# Send.
sock.send(bytes.fromhex("019b"))
# Recv.
r = sock.recv()
assert r.startswith(bytes.fromhex("029b00"))
# Close.
brick.close()
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